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Microemulsions are thermodynamically stable, transparent, isotropic single-phase mixtures of two immiscible liquids stabilized by surfactants (and possibly other compounds). The assortment of very different microstructures behind such a univocal macroscopic definition is presented together with the experimental approaches to their determination. This tutorial review includes a necessary overview of the microemulsion phase behavior including the effect of temperature and salinity and of the features of living polymerlike micelles and living networks. Once these key learning points have been acquired, the different theoretical models proposed to rationalize the microemulsion microstructures are reviewed. The focus is on the use of these models as a rationale for the formulation of microemulsions with suitable features. Finally, current achievements and challenges of the use of microemulsions are reviewed.
Giuseppe Tartaro; Helena Mateos; Davide Schirone; Ruggero Angelico; Gerardo Palazzo. Microemulsion Microstructure(s): A Tutorial Review. Nanomaterials 2020, 10, 1657 .
AMA StyleGiuseppe Tartaro, Helena Mateos, Davide Schirone, Ruggero Angelico, Gerardo Palazzo. Microemulsion Microstructure(s): A Tutorial Review. Nanomaterials. 2020; 10 (9):1657.
Chicago/Turabian StyleGiuseppe Tartaro; Helena Mateos; Davide Schirone; Ruggero Angelico; Gerardo Palazzo. 2020. "Microemulsion Microstructure(s): A Tutorial Review." Nanomaterials 10, no. 9: 1657.
The asphalt industry’s incentive to reduce greenhouse gas emissions has increased since the 1990s due to growing concerns on environmental issues such as global warming and carbon footprint. This has stimulated the introduction of Warm Mix Asphalt (WMA) and its technologies which serve the purpose of reducing greenhouse gas emissions by reducing the mixing and compaction temperatures of asphalt mix. WMA gained popularity due to the environmental benefit it offers without compromising the properties, performance and quality of the asphalt mix. WMA is produced at significantly lower temperatures (slightly above 100 °C) and thus results in less energy consumption, fewer emissions, reduced ageing, lower mixing and compaction temperatures, cool weather paving and better workability of the mix. The latter of these benefits is attributed to the incorporation of additives into WMA. These additives can also confer even better performance of WMA in comparison to conventional Hot Mix Asphalt (HMA) methods. Even though there are recommended dosages of several WMA additives, there is no general standardized mixture design procedure and this makes it challenging to characterize the mechanism(s) of action of these additives in the warm mix. The effects of the addition of additives into WMA are known to a reasonable extent but not so much is known about the underlying interactions and phenomena which bring about the mechanism(s) by which these additives confer beneficial features into the warm mix. Additives in a certain way are being used to bridge the gap and minimize or even nullify the effect of the mixing temperature deficit involved in WMA processes while improving the general properties of the mix. This review presents WMA technologies such as wax, chemical additives and foaming processes and the mechanisms by which they function to confer desired characteristics and improve the durability of the mix. Hybrid techniques are also briefly mentioned in this paper in addition to a detailed description of the specific modes of action of popular WMA technologies such as Sasobit, Evotherm and Advera. This paper highlights the environmental and technical advantages of WMA over the conventional HMA methods and also comprehensively analyzes the mechanism(s) of action of additives in conferring desirable characteristics on WMA, which ultimately improves its durability.
Paolino Caputo; Abraham A. Abe; Valeria Loise; Michele Porto; Pietro Calandra; Ruggero Angelico; Cesare Oliviero Rossi. The Role of Additives in Warm Mix Asphalt Technology: An Insight into Their Mechanisms of Improving an Emerging Technology. Nanomaterials 2020, 10, 1202 .
AMA StylePaolino Caputo, Abraham A. Abe, Valeria Loise, Michele Porto, Pietro Calandra, Ruggero Angelico, Cesare Oliviero Rossi. The Role of Additives in Warm Mix Asphalt Technology: An Insight into Their Mechanisms of Improving an Emerging Technology. Nanomaterials. 2020; 10 (6):1202.
Chicago/Turabian StylePaolino Caputo; Abraham A. Abe; Valeria Loise; Michele Porto; Pietro Calandra; Ruggero Angelico; Cesare Oliviero Rossi. 2020. "The Role of Additives in Warm Mix Asphalt Technology: An Insight into Their Mechanisms of Improving an Emerging Technology." Nanomaterials 10, no. 6: 1202.
This paper evaluated the potentialities of a green and biocompatible rejuvenator agent (HR) in conferring an appreciable resistance against the effects caused by artificial aging on a given bitumen. Both neat and aged bitumens were analyzed and compared to analogous samples modified with HR. Control samples containing a vegetable oil as softening agent were also tested for comparison. The tested samples were subjected to a second aging cycle. Structural differences between the samples were carried out through an inverse Laplace transform of the NMR spin-echo decay (T2) and self-diffusion measurements by pulsed gradient spin echo nuclear magnetic resonance (PGSE-NMR) spectroscopy. In addition, dynamic rheological analyses were conducted to determine the dependence of the gel-sol transition temperature on both the type of additive and ageing process. The present study clearly highlighted the fact that artificial ageing, realized here by the rolling thin film oven test (RTFOT) and the pressure ageing vessel (PAV) test, induced important structural modifications. The analysis of relaxation times and self-diffusion coefficients indicated that ageing promoted the formation of molecular populations characterized by a shift of the distribution toward higher molecular weights compared to unaged bitumen. Diffusion data showed also an Arrhenius-like temperature dependence. A correlation between all the data was attempted to understand the role of the investigated additives. The eco-friendly biocompatible rejuvenator helped not only to restore the structure of the aged bitumen, but even slowed down the processes of a second aging (aiming at the first aged sample).
Valeria Loise; Paolino Caputo; Michele Porto; Bagdat Teltayev; Ruggero Angelico; Cesare Oliviero Rossi. Unravelling the role of a green rejuvenator agent in contrasting the aging effect on bitumen: A dynamics rheology, nuclear magnetic relaxometry and self-diffusion study. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2020, 603, 125182 .
AMA StyleValeria Loise, Paolino Caputo, Michele Porto, Bagdat Teltayev, Ruggero Angelico, Cesare Oliviero Rossi. Unravelling the role of a green rejuvenator agent in contrasting the aging effect on bitumen: A dynamics rheology, nuclear magnetic relaxometry and self-diffusion study. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2020; 603 ():125182.
Chicago/Turabian StyleValeria Loise; Paolino Caputo; Michele Porto; Bagdat Teltayev; Ruggero Angelico; Cesare Oliviero Rossi. 2020. "Unravelling the role of a green rejuvenator agent in contrasting the aging effect on bitumen: A dynamics rheology, nuclear magnetic relaxometry and self-diffusion study." Colloids and Surfaces A: Physicochemical and Engineering Aspects 603, no. : 125182.
Michele Porto; Paolino Caputo; Valeria Loise; Bagdat Burkhanbaiuly Teltayev; Ruggero Angelico; Pietro Calandra; Cesare Oliviero Rossi. NEW EXPERIMENTAL APPROACHES TO ANALYSE THE SUPRAMOLECULAR STRUCTURE OF REJUVENATED AGED BITUMENS. SERIES OF GEOLOGY AND TECHNICAL SCIENCES 2019, 6, 295 -301.
AMA StyleMichele Porto, Paolino Caputo, Valeria Loise, Bagdat Burkhanbaiuly Teltayev, Ruggero Angelico, Pietro Calandra, Cesare Oliviero Rossi. NEW EXPERIMENTAL APPROACHES TO ANALYSE THE SUPRAMOLECULAR STRUCTURE OF REJUVENATED AGED BITUMENS. SERIES OF GEOLOGY AND TECHNICAL SCIENCES. 2019; 6 (438):295-301.
Chicago/Turabian StyleMichele Porto; Paolino Caputo; Valeria Loise; Bagdat Burkhanbaiuly Teltayev; Ruggero Angelico; Pietro Calandra; Cesare Oliviero Rossi. 2019. "NEW EXPERIMENTAL APPROACHES TO ANALYSE THE SUPRAMOLECULAR STRUCTURE OF REJUVENATED AGED BITUMENS." SERIES OF GEOLOGY AND TECHNICAL SCIENCES 6, no. 438: 295-301.
This review aims to explore the state of the knowledge and the state-of-the-art regarding bitumen rejuvenation. In particular, attention was paid to clear things up about the rejuvenator mechanism of action. Frequently, the terms rejuvenator and flux oil, or oil (i.e., softening agent) are used as if they were synonymous. According to our knowledge, these two terms refer to substances producing different modifications to the aged bitumen: they can decrease the viscosity (softening agents), or, in addition to this, restore the original microstructure (real rejuvenators). In order to deal with the argument in its entirety, the bitumen is investigated in terms of chemical structure and microstructural features. Proper investigating tools are, therefore, needed to distinguish the different mechanisms of action of the various types of bitumen, so attention is focused on recent research and the use of different investigation techniques to distinguish between various additives. Methods based on organic synthesis can also be used to prepare ad-hoc rejuvenating molecules with higher performances. The interplay of chemical interaction, structural changes and overall effect of the additive is then presented in terms of the modern concepts of complex systems, which furnishes valid arguments to suggest X-ray scattering and Nuclear Magnetic Resonance relaxometry experiments as vanguard and forefront tools to study bitumen. Far from being a standard review, this work represents a critical analysis of the state-of-the-art taking into account for the molecular basis at the origin of the observed behavior. Furnishing a novel viewpoint for the study of bitumen based on the concepts of the complex systems in physics, it constitutes a novel approach for the study of these systems.
Valeria Loise; Paolino Caputo; Michele Porto; Pietro Calandra; Ruggero Angelico; Cesare Oliviero Rossi. A Review on Bitumen Rejuvenation: Mechanisms, Materials, Methods and Perspectives. Applied Sciences 2019, 9, 4316 .
AMA StyleValeria Loise, Paolino Caputo, Michele Porto, Pietro Calandra, Ruggero Angelico, Cesare Oliviero Rossi. A Review on Bitumen Rejuvenation: Mechanisms, Materials, Methods and Perspectives. Applied Sciences. 2019; 9 (20):4316.
Chicago/Turabian StyleValeria Loise; Paolino Caputo; Michele Porto; Pietro Calandra; Ruggero Angelico; Cesare Oliviero Rossi. 2019. "A Review on Bitumen Rejuvenation: Mechanisms, Materials, Methods and Perspectives." Applied Sciences 9, no. 20: 4316.
In soil, iron (Fe) solubility depends on complex interactions between Fe minerals and organic matter, but very little is known about plant availability of Fe present in Fe oxides associated with humic substances. For this purpose, this study investigates the effect of Fe mineral crystallinity in the presence of humic acids (HA) on Fe availability to plants. Four Fe–HA mineral coprecipitates were prepared, either in the presence or absence of oxygen, i.e., two goethite (G)‐HA samples containing large amounts of Fe as nanocrystalline goethite and ferrihydrite mixed phases, and two magnetite (M)‐HA samples containing crystalline magnetite. Bioavailability studies were conducted in hydroponic systems on cucumber plants (Cucumis sativus L.) grown under Fe deficient conditions and supplied with the Fe–HA coprecipitates containing goethite or magnetite. Results showed that plants grown in the presence of Fe–HA coprecipitates exhibited a complete recovery from Fe deficiency, albeit less efficiently than plants resupplied with Fe‐chelate fertilizer used as control (Fe‐diethylene triamine penta acetic acid, Fe‐DTPA). However, the supply with either G‐ or M–HA coprecipitates produced different effects on plants: G–HA‐treated plants showed a higher Fe content in leaves, while M–HA‐treated plants displayed a higher leaf biomass and SPAD (Soil–Plant Analysis Development) index recovery, as compared to Fe‐DTPA. The distribution of macronutrients in the leaves, as imaged by micro X‐ray fluorescence (µXRF) spectroscopy, was different in G–HA and M–HA‐treated plants. In particular, plants supplied with the poorly crystalline G–HA coprecipitate with a lower Fe/HA ratio showed features more similar to those of fully recovered plants (supplied with Fe‐DTPA). These results highlight the importance of mineral crystallinity of Fe–HA coprecipitates on Fe bioavailability and Fe uptake in hydroponic experiments. In addition, the present data demonstrate that cucumber plants can efficiently mobilize Fe, even from goethite and ferrihydrite mixed phases and magnetite, which are usually considered unavailable for plant nutrition.
Erika Di Iorio; Claudio Colombo; Ruggero Angelico; Roberto Terzano; Carlo Porfido; Fabio Valentinuzzi; Youry Pii; Tanja Mimmo; Stefano Cesco. Iron oxide‐humic acid coprecipitates as iron source for cucumber plants. Journal of Plant Nutrition and Soil Science 2019, 182, 921 -933.
AMA StyleErika Di Iorio, Claudio Colombo, Ruggero Angelico, Roberto Terzano, Carlo Porfido, Fabio Valentinuzzi, Youry Pii, Tanja Mimmo, Stefano Cesco. Iron oxide‐humic acid coprecipitates as iron source for cucumber plants. Journal of Plant Nutrition and Soil Science. 2019; 182 (6):921-933.
Chicago/Turabian StyleErika Di Iorio; Claudio Colombo; Ruggero Angelico; Roberto Terzano; Carlo Porfido; Fabio Valentinuzzi; Youry Pii; Tanja Mimmo; Stefano Cesco. 2019. "Iron oxide‐humic acid coprecipitates as iron source for cucumber plants." Journal of Plant Nutrition and Soil Science 182, no. 6: 921-933.
The interfacial behavior at the asphalt/salt solution is really important to understand and improve the road durability near sea areas or in zones where salt is added to avoid traffic problems (i.e. mountain areas in winter). Consequently, in an attempt to understand the problems, dynamic interfacial tensions between bitumen modified with selected additives and aqueous salt solutions were measured to simulate the effect of salinity on the adhesion properties of asphalt in sea areas. In addition, contact angle and boiling water tests were performed to understand better the salt effect. Three different surfactants were used in this work to obtain modified bitumen solutions: a cationic, a nonionic organosilane surfactant and a primary alkyl amine surfactant. Generally, the salt had a pejorative effect on the adhesion of the bitumen on the stones, but the presence of small amounts of organosilane surfactant looked likely to have the best performance and then it was also tested against different salt concentrations. All the dynamic interfacial results were studied and analyzed thanks to the Ward-Torday model and the Graham and Phillips approach, obtaining information about the interfacial properties of the asphalt/brine interface. Thanks to these results, the complex adhesion phenomena at the brine interface could be better understood with an improvement effect on the additives to be used to avoid the premature ageing of the road surfaces.
Noemi Baldino; Ruggero Angelico; Paolino Caputo; Domenico Gabriele; Cesare Oliviero Rossi. Effect of high water salinity on the adhesion properties of model bitumen modified with a smart additive. Construction and Building Materials 2019, 225, 642 -648.
AMA StyleNoemi Baldino, Ruggero Angelico, Paolino Caputo, Domenico Gabriele, Cesare Oliviero Rossi. Effect of high water salinity on the adhesion properties of model bitumen modified with a smart additive. Construction and Building Materials. 2019; 225 ():642-648.
Chicago/Turabian StyleNoemi Baldino; Ruggero Angelico; Paolino Caputo; Domenico Gabriele; Cesare Oliviero Rossi. 2019. "Effect of high water salinity on the adhesion properties of model bitumen modified with a smart additive." Construction and Building Materials 225, no. : 642-648.
Silymarin, a mixture of flavonolignan and flavonoid polyphenolic compounds extractable from milk thistle (Silybum marianum) seeds, has anti-oxidant, anti-inflammatory, anti-cancer and anti-viral activities potentially useful in the treatment of several liver disorders, such as chronic liver diseases, cirrhosis and hepatocellular carcinoma. Equally promising are the effects of silymarin in protecting the brain from the inflammatory and oxidative stress effects by which metabolic syndrome contributes to neurodegenerative diseases. However, although clinical trials have proved that silymarin is safe at high doses (>1500 mg/day) in humans, it suffers limiting factors such as low solubility in water (
Alfonso Di Costanzo; Ruggero Angelico. Formulation Strategies for Enhancing the Bioavailability of Silymarin: The State of the Art. Molecules 2019, 24, 2155 .
AMA StyleAlfonso Di Costanzo, Ruggero Angelico. Formulation Strategies for Enhancing the Bioavailability of Silymarin: The State of the Art. Molecules. 2019; 24 (11):2155.
Chicago/Turabian StyleAlfonso Di Costanzo; Ruggero Angelico. 2019. "Formulation Strategies for Enhancing the Bioavailability of Silymarin: The State of the Art." Molecules 24, no. 11: 2155.
Magnetite nanoparticles (NPs) were synthetized by partial oxidation of hot Fe(II) sulfate aqueous solutions upon addition of variable amounts of alkali/nitrate ions in a N2 atmosphere. The resulting NPs were extensively characterized by Scanning Electron Microscopy (SEM), X-Ray Powder Diffraction (XRPD), Dynamic Light Scattering (DLS) and Brunauer-Emmett-Teller (BET) analysis. Depending on the final pH after synthesis, partially oxidized magnetite NPs were obtained with average crystallite size ranging from 29 to 116 nm. The potential of NPs as arsenic adsorbents was investigated through batch adsorption experiments. The analysis of the adsorption isotherms performed on the basis of both Freundlich and Langmuir models, revealed that arsenic adsorption capacity was more efficient for magnetite NPs synthetized at final pH ≤ 6.56, characterized by polydisperse submicrometric aggregates with coarse macro- and mesopore distributions.
Erika Di Iorio; Claudio Colombo; Zhongqi Cheng; Giancarlo Capitani; Daniela Mele; Gennaro Ventruti; Ruggero Angelico. Characterization of magnetite nanoparticles synthetized from Fe(II)/nitrate solutions for arsenic removal from water. Journal of Environmental Chemical Engineering 2019, 7, 102986 .
AMA StyleErika Di Iorio, Claudio Colombo, Zhongqi Cheng, Giancarlo Capitani, Daniela Mele, Gennaro Ventruti, Ruggero Angelico. Characterization of magnetite nanoparticles synthetized from Fe(II)/nitrate solutions for arsenic removal from water. Journal of Environmental Chemical Engineering. 2019; 7 (2):102986.
Chicago/Turabian StyleErika Di Iorio; Claudio Colombo; Zhongqi Cheng; Giancarlo Capitani; Daniela Mele; Gennaro Ventruti; Ruggero Angelico. 2019. "Characterization of magnetite nanoparticles synthetized from Fe(II)/nitrate solutions for arsenic removal from water." Journal of Environmental Chemical Engineering 7, no. 2: 102986.
Bitumen aging is the major factor contributing to the deterioration of the road pavement. Oxidation and volatilization are generally considered as the most important phenomena affecting aging in asphalt paving mixtures. The present study was carried out to investigate whether various antioxidants provided by natural resources such as phospholipids, ascorbic acid as well as lignin from rice husk, could be used to reduce age hardening in asphalt binders. A selected bituminous material was modified by adding 2% w/w of the anti-aging natural additives and subjected to accelerated oxidative aging regimes according to the Rolling Thin Film Oven Test (RTFOT) method. The effects of aging were evaluated based on changes in sol-gel transition temperature of modified bitumens measured through Dynamic Shear Rheology (DSR). Moreover, changes of Electron Paramagnetic Resonance (EPR) spectra were monitored on the bituminous fractions asphaltene and maltene separated by solvent extraction upon oxidative aging. The phospholipids-treated binder exhibited the highest resistance to oxidation and the lowest age-hardening effect compared to the other tested anti-oxidants. The combination of EPR and DSR techniques represents a promising method for elucidating the changes in associated complex properties of bitumen fractions promoted by addition of free radical scavengers borrowed by green resources.
Cesare Oliviero Rossi; Paolino Caputo; Saltanat Ashimova; Antonio Fabozzi; Gerardino D’Errico; Ruggero Angelico. Effects of Natural Antioxidant Agents on the Bitumen Aging Process: An EPR and Rheological Investigation. Applied Sciences 2018, 8, 1405 .
AMA StyleCesare Oliviero Rossi, Paolino Caputo, Saltanat Ashimova, Antonio Fabozzi, Gerardino D’Errico, Ruggero Angelico. Effects of Natural Antioxidant Agents on the Bitumen Aging Process: An EPR and Rheological Investigation. Applied Sciences. 2018; 8 (8):1405.
Chicago/Turabian StyleCesare Oliviero Rossi; Paolino Caputo; Saltanat Ashimova; Antonio Fabozzi; Gerardino D’Errico; Ruggero Angelico. 2018. "Effects of Natural Antioxidant Agents on the Bitumen Aging Process: An EPR and Rheological Investigation." Applied Sciences 8, no. 8: 1405.
Bitumen aging is the major factor which contributes to the deterioration of the road pavement. Oxidation and volatilization are generally considered as the most important phenomena affecting aging in asphalt paving mixtures. The present study was carried to investigate whether various antioxidants provided by natural resources such as phospholipids, ascorbic acid as well as lignin from rice husk, could be used to reduce age hardening in asphalt binders. A selected bituminous material was modified by adding 2 % w/w of the anti-aging natural additives and subjected to accelerated oxidative aging regimes according to the Rolling Thin Film Oven Test (RTFOT) method. The effects of aging were evaluated based on changes in sol-gel transition temperature of modified bitumens measured through Dynamic Shear Rheology (DSR). Moreover, changes of Electron Paramagnetic Resonance (EPR) spectra were monitored on the bituminous fractions asphaltene and maltene separated by solvent extraction upon oxidative aging. The phospholipids-treated binder exhibited the highest resistance to oxidation and the lowest age-hardening effect compared to the other tested anti-oxidants. The combination of EPR and DSR techniques represents a promising method for elucidating the changes in associated complex properties of bitumen fractions promoted by addition of free radical scavengers borrowed by green resources.
Cesare Oliviero Rossi; Paolino Caputo; Saltanat Ashimova; Antonio Fabozzi; Gerardino D'errico; Ruggero Angelico. Effects of Natural Antioxidant Agents on the Bitumen Aging Process: An EPR and Rheological Investigation. 2018, 1 .
AMA StyleCesare Oliviero Rossi, Paolino Caputo, Saltanat Ashimova, Antonio Fabozzi, Gerardino D'errico, Ruggero Angelico. Effects of Natural Antioxidant Agents on the Bitumen Aging Process: An EPR and Rheological Investigation. . 2018; ():1.
Chicago/Turabian StyleCesare Oliviero Rossi; Paolino Caputo; Saltanat Ashimova; Antonio Fabozzi; Gerardino D'errico; Ruggero Angelico. 2018. "Effects of Natural Antioxidant Agents on the Bitumen Aging Process: An EPR and Rheological Investigation." , no. : 1.
Lenticular, ellipsoidal and flat tubular hematite particles were precipitated from ferric nitrate solutions in presence of minor amounts of Al, Si, Mg and organic acids (oxalic, citric and tartaric). Particle shape identification was performed using Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM). Arsenate adsorption onto hematite with different morphologies was studied in batch experiments and through vibrational spectroscopy. Three bands assigned to As(V)–O–Fe at, respectively, 920, 895 and 820 cm−1 were in agreement with sorption data indicating inner-sphere complexes. As(V) adsorption kinetics was well described by a general model for diffusion into microporous surface sites showing large difference among the studied hematite samples. The maximum As(V) adsorption occurred near pH 4.0 while at alkaline pH there was a significant decrease of adsorption as confirmed by the shift of infrared As–O stretching bands of arsenate group. A change from tetrahedral Td symmetry to more stable symmetric groups such as C3v (monodentate complex), C2v (bidentate binuclear) or C1v (edge-sharing, bidentate binuclear) was deduced for As(V) sorbed on hematite. Fast arsenate adsorption was higher on ellipsoidal hematite particle with a dominant non basal (1 1 0) face. On the contrary, electrostatic attraction interaction could explain the fast As(V) adsorption on platy morphology characterized by basal face (0 0 1). Despite the discrepancy between theoretical considerations and experimental observations, the present contribution could lead to better understanding of the role played by hematite morphology on surface complexation model to describe arsenic adsorption behavior. Diffusional mass transport models applied to As sorption systems can explain such divergence due to: (i) external mass transport across the boundary layer surrounding the particle; (ii) diffusional mass transfer within the internal structure of the adsorbent particle by a nanopore, (iii) heterogeneity of the surface site. These findings are relevant to understanding the rates of interfacial processes involving arsenate sorption that can be take into account in mass transport models used for the removal of arsenic from contaminated water or wastewaters.
Erika Di Iorio; Hyen Goo Cho; Ying Liu; Zhongqi Cheng; Ruggero Angelico; Claudio Colombo. Arsenate retention mechanisms on hematite with different morphologies evaluated using AFM, TEM measurements and vibrational spectroscopy. Geochimica et Cosmochimica Acta 2018, 237, 155 -170.
AMA StyleErika Di Iorio, Hyen Goo Cho, Ying Liu, Zhongqi Cheng, Ruggero Angelico, Claudio Colombo. Arsenate retention mechanisms on hematite with different morphologies evaluated using AFM, TEM measurements and vibrational spectroscopy. Geochimica et Cosmochimica Acta. 2018; 237 ():155-170.
Chicago/Turabian StyleErika Di Iorio; Hyen Goo Cho; Ying Liu; Zhongqi Cheng; Ruggero Angelico; Claudio Colombo. 2018. "Arsenate retention mechanisms on hematite with different morphologies evaluated using AFM, TEM measurements and vibrational spectroscopy." Geochimica et Cosmochimica Acta 237, no. : 155-170.
Cesare Oliviero Rossi; Paolino Caputo; Valeria Loise; Domenico Miriello; Bagdat Teltayev; Ruggero Angelico. Role of a food grade additive in the high temperature performance of modified bitumens. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2017, 532, 618 -624.
AMA StyleCesare Oliviero Rossi, Paolino Caputo, Valeria Loise, Domenico Miriello, Bagdat Teltayev, Ruggero Angelico. Role of a food grade additive in the high temperature performance of modified bitumens. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2017; 532 ():618-624.
Chicago/Turabian StyleCesare Oliviero Rossi; Paolino Caputo; Valeria Loise; Domenico Miriello; Bagdat Teltayev; Ruggero Angelico. 2017. "Role of a food grade additive in the high temperature performance of modified bitumens." Colloids and Surfaces A: Physicochemical and Engineering Aspects 532, no. : 618-624.
Due to the wide variation in geographic and climatic conditions, the search for high-performance bituminous materials is becoming more and more urgent to increase the useful life of pavements and reduce the enormous cost of road maintenance. Extensive research has been done by testing various bitumen modifiers, although most of them are petroleum-derived additives, such as polymers, rubbers and plastic, which in turn do not prevent oxidative aging of the binder. Thus, as an alternative to the most common polymeric rheological modifiers, selected binder additives falling in the categories of organosilane (P2KA), polyphosphoric acid (PPA) and food grade phospholipids (LCS) were homogeneously mixed to a base bitumen. The goal was to analyse the micro-morphology of the bitumens (neat and modified) subjected to different cooling rates and to find the corresponding correlations in the mechanical response domain. Therefore, microstructural investigations carried out by Atomic Force Microscopy (AFM) and fundamental rheological tests based on oscillatory dynamic rheology, were used to evaluate the effect of additives on the bitumen structure and compared with pristine binder as a reference. The tested bitumen additives have been shown to elicit different mechanical behaviours by varying the cooling rate. By comparing rheological data, analysed in the framework of the “weak gel” model, and AFM images, it was found that both P2KA and PPA altered the material structure in a different manner whereas LCS revealed superior performances, acting as “mechanical buffer” in the whole explored range of cooling rates.
Cesare Oliviero Rossi; Saltanat Ashimova; Pietro Calandra; Maria Penelope De Santo; Ruggero Angelico. Mechanical Resilience of Modified Bitumen at Different Cooling Rates: A Rheological and Atomic Force Microscopy Investigation. Applied Sciences 2017, 7, 779 .
AMA StyleCesare Oliviero Rossi, Saltanat Ashimova, Pietro Calandra, Maria Penelope De Santo, Ruggero Angelico. Mechanical Resilience of Modified Bitumen at Different Cooling Rates: A Rheological and Atomic Force Microscopy Investigation. Applied Sciences. 2017; 7 (8):779.
Chicago/Turabian StyleCesare Oliviero Rossi; Saltanat Ashimova; Pietro Calandra; Maria Penelope De Santo; Ruggero Angelico. 2017. "Mechanical Resilience of Modified Bitumen at Different Cooling Rates: A Rheological and Atomic Force Microscopy Investigation." Applied Sciences 7, no. 8: 779.
This review focuses on certain classes of organic compounds known variously in the specific literature of asphalt as adhesion promoters, antistripping agents, wetting agents, antistrips, or adhesion agents. These kinds of organic additives are currently formulated to enhance the bitumen coating of mineral aggregates and improve the workability of asphalt mixtures. In this review, the term “adhesion promoters” includes both synthetic organic compounds as well as those extracted from natural resources, mixed in trace amounts to bitumen. Their main role is to alter the interfacial energy, so that the presence of water, even in trace, does not weaken the bitumen-aggregate bond and tends to favor adhesion. The report also considers the chemical functionalities that play a predominant role in bonding, as well as the effects of surface modification of the aggregate due to the presence of adhesion promoters in pre-blended bituminous mixtures. Although bitumen is widely used in road pavement construction and the discussion is mainly addressed to the improvement of adhesion in road materials, adhesion and wetting properties can also represent a general issue in various bitumen-based industrial products.
Cesare Oliviero Rossi; Bagdat Teltayev; Ruggero Angelico. Adhesion Promoters in Bituminous Road Materials: A Review. Applied Sciences 2017, 7, 524 .
AMA StyleCesare Oliviero Rossi, Bagdat Teltayev, Ruggero Angelico. Adhesion Promoters in Bituminous Road Materials: A Review. Applied Sciences. 2017; 7 (5):524.
Chicago/Turabian StyleCesare Oliviero Rossi; Bagdat Teltayev; Ruggero Angelico. 2017. "Adhesion Promoters in Bituminous Road Materials: A Review." Applied Sciences 7, no. 5: 524.
Systems made of water, surfactant, and oil exhibit a rich variety of microstructures. Among these, the networks based on cylindrical geometries can be entangled or interconnected, depending on the formulation of the system, and represent a challenging topic. Lecithin reverse wormlike micelles (WLMs), because of the exceptionally slow dynamics of molecules and aggregates, are a system of choice for NMR studies. After a brief introduction of the pulsed field magnetic gradient (PFG)-NMR and Rheo-NMR techniques, the progress achieved in the past years in rationalizing the structure and dynamics of lecithin reverse WLMs is reviewed.
Ruggero Angelico; Sergio Murgia; Gerardo Palazzo. Chapter 3. Reverse Wormlike Micelles: A Special Focus on Nuclear Magnetic Resonance Investigations. Wormlike Micelles 2017, 31 -62.
AMA StyleRuggero Angelico, Sergio Murgia, Gerardo Palazzo. Chapter 3. Reverse Wormlike Micelles: A Special Focus on Nuclear Magnetic Resonance Investigations. Wormlike Micelles. 2017; ():31-62.
Chicago/Turabian StyleRuggero Angelico; Sergio Murgia; Gerardo Palazzo. 2017. "Chapter 3. Reverse Wormlike Micelles: A Special Focus on Nuclear Magnetic Resonance Investigations." Wormlike Micelles , no. : 31-62.
Herein, the evaluation of the effectiveness of several adhesion promoters for asphalt according to the chemical and mineralogical nature of the stone was investigated. From research in the road construction sector, the most common types of activators present on the market are classified according to the chemical nature of their active ingredient: amides, polyphosphoric acid (PPA) esters and organosilanes. Therefore, for each of these families, the adhesive properties of the corresponding modified bitumen loaded with a fixed amount of active agent, were tested on four types of stone materials. X-Ray Powder Diffractometry (XRPD), X-Ray Fluorescence (XRF) and Environmental Scanning Electron Microscope Energy Dispersive Spectroscopy (ESEM-EDS) were carried out in order to establish the chemical and mineralogical nature and identify the agglomerate structures of the selected inert rocks. Among various screened products, the organosilane-based additive showed excellent adhesive performances, independently of the chemical composition of inorganic interfaces, as confirmed by both contact angle and boil test measurements. Conversely, basic nature activators such as amides and those with an acidic nature, such as the esters of PPA, were greatly affected by the type of mineral substrate. Finally, the effect of added adhesive agents on the viscoelasticity of modified bitumen was checked in the linear regime by oscillatory rheology. Differences in the adhesive properties observed among the tested classes of amphiphilic binders were discussed in terms of difference in the sizes of their respective head groups.
Cesare Oliviero Rossi; Paolino Caputo; Noemi Baldino; Francesca Romana Lupi; Domenico Miriello; Ruggero Angelico. Effects of adhesion promoters on the contact angle of bitumen-aggregate interface. International Journal of Adhesion and Adhesives 2016, 70, 297 -303.
AMA StyleCesare Oliviero Rossi, Paolino Caputo, Noemi Baldino, Francesca Romana Lupi, Domenico Miriello, Ruggero Angelico. Effects of adhesion promoters on the contact angle of bitumen-aggregate interface. International Journal of Adhesion and Adhesives. 2016; 70 ():297-303.
Chicago/Turabian StyleCesare Oliviero Rossi; Paolino Caputo; Noemi Baldino; Francesca Romana Lupi; Domenico Miriello; Ruggero Angelico. 2016. "Effects of adhesion promoters on the contact angle of bitumen-aggregate interface." International Journal of Adhesion and Adhesives 70, no. : 297-303.
Liposomes are nanocarriers able to solubilize and deliver a wide range of hydrophobic pharmaceuticals and to increase drug bioavailability. They show a natural tendency to hepatic accumulation, and thus represent an optimal drug delivery system for the treatment of liver diseases, including chronic virus hepatitis C. Silibinin, the main and more active component of the seed extract from Silybum Marianum, is a hydrophobic flavolignan emerging as an alternative medication for the treatment of hepatitis C virus infection, as it has been shown to inhibit hepatitis C virus entry and replication. In this study we compared cellular delivery and antiviral activity of silibinin encapsulated into phytoliposomes or not, used at the aim to overcome its poor water-solubility and bioavailability. First, it was confirmed the inhibitory activity manifested by lipid-free silibinin in preventing hepatitis C virus entry into the cells. Our data clearly demonstrated that phytoliposome-encapsulated silibinin was absorbed by the cells 2.4 fold more efficiently than the free molecule and showed a three hundreds fold more potent pharmacological activity. Moreover, we surprisingly observed that phytoliposomes themselves inhibited virus entry by reducing the infectivity of viral particles. Based on these observations, phytoliposomes used in this study might be proposed as a delivery system actively contributing to the antiviral efficacy of the encapsulated drug.
Maria Ripoli; Ruggero Angelico; Pasquale Sacco; Andrea Ceglie; Alessandra Mangia. Phytoliposome-Based Silibinin Delivery System as a Promising Strategy to Prevent Hepatitis C Virus Infection. Journal of Biomedical Nanotechnology 2016, 12, 770 -780.
AMA StyleMaria Ripoli, Ruggero Angelico, Pasquale Sacco, Andrea Ceglie, Alessandra Mangia. Phytoliposome-Based Silibinin Delivery System as a Promising Strategy to Prevent Hepatitis C Virus Infection. Journal of Biomedical Nanotechnology. 2016; 12 (4):770-780.
Chicago/Turabian StyleMaria Ripoli; Ruggero Angelico; Pasquale Sacco; Andrea Ceglie; Alessandra Mangia. 2016. "Phytoliposome-Based Silibinin Delivery System as a Promising Strategy to Prevent Hepatitis C Virus Infection." Journal of Biomedical Nanotechnology 12, no. 4: 770-780.
Organogel formed by lecithin reverse wormlike micelles in the isotropic concentrated regime exhibits flow induced micro-heterogeneities detected by rheo-NMR and NMR-velocimetry.
Ruggero Angelico; L. Gentile; G. A. Ranieri; C. Oliviero Rossi. Flow-induced structures observed in a viscoelastic reverse wormlike micellar system by magnetic resonance imaging and NMR velocimetry. RSC Advances 2016, 6, 33339 -33347.
AMA StyleRuggero Angelico, L. Gentile, G. A. Ranieri, C. Oliviero Rossi. Flow-induced structures observed in a viscoelastic reverse wormlike micellar system by magnetic resonance imaging and NMR velocimetry. RSC Advances. 2016; 6 (40):33339-33347.
Chicago/Turabian StyleRuggero Angelico; L. Gentile; G. A. Ranieri; C. Oliviero Rossi. 2016. "Flow-induced structures observed in a viscoelastic reverse wormlike micellar system by magnetic resonance imaging and NMR velocimetry." RSC Advances 6, no. 40: 33339-33347.
Atomic force microscopy in contact (AFM-C) mode was used to investigate the molecular dynamics of leonardite humic acid (HA) aggregate formed at different pH values. HA nanoparticles dispersed at pH values ranging from 2 to 12 were observed on a mica surface under dry conditions. The most clearly resolved and well-resulted AFM images of single particle were obtained at pH 5, where HA appeared as supramolecular particles with a conic shape and a hole in the centre. Those observations suggested that HA formed under these conditions exhibited a pseudo-amphiphilic nature, with secluded hydrophobic domains and polar subunits in direct contact with hydrophilic mica surface. Based on molecular simulation methods, a lignin–carbohydrate complex (LCC) model was proposed to explain the HA ring-like morphology. The LCC model optimized the parameters of β-O-4 linkages between 14 units of 1–4 phenyl propanoid, and resulted in an optimized structure comprising 45–50 linear helical molecules looped spirally around a central cavity. Those results added new insights on the adsorption mechanism of HA on polar surfaces as a function of pH, which was relevant from the point of view of natural aggregation in soil environment.
Claudio Colombo; Giuseppe Palumbo; Ruggero Angelico; Hyen Goo Cho; Ornella Francioso; Andrea Ertani; Serenella Nardi. Spontaneous aggregation of humic acid observed with AFM at different pH. Chemosphere 2015, 138, 821 -828.
AMA StyleClaudio Colombo, Giuseppe Palumbo, Ruggero Angelico, Hyen Goo Cho, Ornella Francioso, Andrea Ertani, Serenella Nardi. Spontaneous aggregation of humic acid observed with AFM at different pH. Chemosphere. 2015; 138 ():821-828.
Chicago/Turabian StyleClaudio Colombo; Giuseppe Palumbo; Ruggero Angelico; Hyen Goo Cho; Ornella Francioso; Andrea Ertani; Serenella Nardi. 2015. "Spontaneous aggregation of humic acid observed with AFM at different pH." Chemosphere 138, no. : 821-828.