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Inspired by the antifouling properties of scaly fish, the conventional silicone coating with phenylmethylsilicone oil (PSO/PDMS) composite coating was fabricated and modified with single layer polystyrene (PS) microsphere (PSO/PDMS-PS) arrays. The fish scale like micro-nano structures were fabricated on the surface of bio-inspired coating, which can reduce the contact area with the secreted protein membrane of fouling organisms effectively and prevent further adhesion between fouling organisms and bio-inspired coating. Meanwhile, PSO exuded to the coating surface has the similar function with mucus secreted by fish epidermis, which make the coating surface slithery and will be polished with the fouling organisms in turbulent waters. Compared to PSO/PDMS coating without any structure and conventional silicone coating, PSO/PDMS-PS showed better antiadhesion activity against both marine bacteria and benthic diatom (Navicula sp.). Additionally, the existence of PS microspheres can reduce the release rate of PSO greatly, which will extend the service life of coating. Compared to PSO/PDMS coating, the sustained release efficiency of PSO/PDMS-PS coating can reach 23.2%. This facile method for fabricating the bio-inspired composite slow-release antifouling coating shows a widely fabricating path for the development of synergistic anti-fouling coating.
Yanqiang Mo; Peihong Xue; Qiang Yang; Hao Liu; Xu Zhao; Jiaqi Wang; Meihua Jin; Yuhong Qi. Composite Slow-Release Fouling Release Coating Inspired by Synergistic Anti-Fouling Effect of Scaly Fish. Polymers 2021, 13, 2602 .
AMA StyleYanqiang Mo, Peihong Xue, Qiang Yang, Hao Liu, Xu Zhao, Jiaqi Wang, Meihua Jin, Yuhong Qi. Composite Slow-Release Fouling Release Coating Inspired by Synergistic Anti-Fouling Effect of Scaly Fish. Polymers. 2021; 13 (16):2602.
Chicago/Turabian StyleYanqiang Mo; Peihong Xue; Qiang Yang; Hao Liu; Xu Zhao; Jiaqi Wang; Meihua Jin; Yuhong Qi. 2021. "Composite Slow-Release Fouling Release Coating Inspired by Synergistic Anti-Fouling Effect of Scaly Fish." Polymers 13, no. 16: 2602.
To improve the mechanical strength and practicability of hydrogels, polystyrene microspheres with core–shell structure were prepared by the soap-free emulsion polymerization, polyethylene glycol hydrogels with polystyrene microspheres by the in-situ polymerization. The structure, morphology, roughness, swelling property, surface energy, and mechanical properties of the microspheres and hydrogels were investigated by Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, confocal laser microscopy, swelling test, contact angle measurement, and compression test. The results showed that they have certain swelling capacity and excellent mechanical properties, and can change from hydrophobic to hydrophilic surface. The reason is that the hydrophilic chain segment can migrate, enrich, and form a hydration layer on the surface after soaking for a certain time. Introducing proper content of polystyrene microspheres into the hydrogel, the compressive strength and swelling degree improved obviously. Increasing the content of polystyrene microspheres, the surface energy of the hydrogels decreased gradually.
Chen Zhang; Zhanping Zhang; Yuhong Qi. Preparation, Structure, and Properties of Polystyrene-Microsphere-Reinforced PEG-Based Hydrogels. Polymers 2021, 13, 2605 .
AMA StyleChen Zhang, Zhanping Zhang, Yuhong Qi. Preparation, Structure, and Properties of Polystyrene-Microsphere-Reinforced PEG-Based Hydrogels. Polymers. 2021; 13 (16):2605.
Chicago/Turabian StyleChen Zhang; Zhanping Zhang; Yuhong Qi. 2021. "Preparation, Structure, and Properties of Polystyrene-Microsphere-Reinforced PEG-Based Hydrogels." Polymers 13, no. 16: 2605.
The compatibility of three types of silicone oil with polydimethylsiloxane, the phase separation of their mixture and the microstructure and properties of their composite coatings were investigated. The existing form of silicone oil in the coating and the precipitation behavior were also studied. The compatibility observed experimentally of the three silicone oils with PDMS is consistent with the results of the thermodynamic calculation. The silicone oil droplet produced by phase separation in the mixture solution can keep its shape in the cured coating, also affecting the microstructure and mechanical properties of the coating. It was found that methyl silicone oil and methyl fluoro silicone oil do not precipitate on the surface, and they have no effect on the surface properties of the coating. In contrast, phenyl silicone oil has obvious effect on the surface, which makes the water contact angle and diiodomethane contact angle of the coating decrease significantly.
Yuguo Jiang; Zhanping Zhang; Yuhong Qi. The Compatibility of Three Silicone Oils with Polydimethylsiloxane and the Microstructure and Properties of Their Composite Coatings. Polymers 2021, 13, 2355 .
AMA StyleYuguo Jiang, Zhanping Zhang, Yuhong Qi. The Compatibility of Three Silicone Oils with Polydimethylsiloxane and the Microstructure and Properties of Their Composite Coatings. Polymers. 2021; 13 (14):2355.
Chicago/Turabian StyleYuguo Jiang; Zhanping Zhang; Yuhong Qi. 2021. "The Compatibility of Three Silicone Oils with Polydimethylsiloxane and the Microstructure and Properties of Their Composite Coatings." Polymers 13, no. 14: 2355.
Polyurethane has a microphase separation structure, while polyethylene glycol (PEG) can form a hydrated layer to resist protein adsorption. In this paper, PEG was introduced to polyurethane to improve the antifouling properties of the polyurethane, providing a new method and idea for the preparation of new antifouling polyurethane materials. The mechanical properties, hydrophilicity, swelling degree, microphase separation and antifouling performance of the coatings were evaluated. The response characteristics of the polyurethane coatings in a seawater environment were studied, and the performance changes of coatings in seawater were tested. The results showed that the crystallized PEG soft segments increased, promoting microphase separation. The stress at 100% and the elasticity modulus of the polyurethane material also markedly increased, in addition to increases in the swelling degree in seawater, the water contact angle decreased. A total of 25% of PEG incorporated into a soft segment can markedly improve the antibacterial properties of the coatings, but adding more PEG has little significant effect. After immersion in seawater, the coatings became softer and more elastic. This is because water molecules formed hydrogen bonding with the amino NH, which resulted in a weakening effect being exerted on the carbonyl C=O hydrogen bonding and ether oxygen group crystallization.
Kejiao Li; Yuhong Qi; Yingju Zhou; Xiaoyu Sun; Zhanping Zhang. Microstructure and Properties of Poly(Ethylene Glycol)-Segmented Polyurethane Antifouling Coatings after Immersion in Seawater. Polymers 2021, 13, 573 .
AMA StyleKejiao Li, Yuhong Qi, Yingju Zhou, Xiaoyu Sun, Zhanping Zhang. Microstructure and Properties of Poly(Ethylene Glycol)-Segmented Polyurethane Antifouling Coatings after Immersion in Seawater. Polymers. 2021; 13 (4):573.
Chicago/Turabian StyleKejiao Li; Yuhong Qi; Yingju Zhou; Xiaoyu Sun; Zhanping Zhang. 2021. "Microstructure and Properties of Poly(Ethylene Glycol)-Segmented Polyurethane Antifouling Coatings after Immersion in Seawater." Polymers 13, no. 4: 573.
In this work, modified silicone tie-paints were prepared in a simple way for securing adhesion between the epoxy anticorrosive primer and silicone fouling release coating. Hydroxy-terminated polydimethylsiloxane (PDMS) mixture containing fillers and accessory ingredient was prepared as base component. N-(2-Aminoethyl)-3-aminopropyltrimethoxysilane (DAMO) was mechanically mixed with other functional additives as curing component. ATR-FTIR, XPS, SEM and tensile tests were used to investigate the chemical structure, morphology and mechanical properties of the tie-coatings. It was focused on the effect of the DAMO content on the adhesion of the tie-coating to epoxy primer. Peel off and shear tests were carried out to evaluate the adhesion. The results showed that introducing DAMO can significantly improve the properties of the tie-coating. The adhesion between the tie-coating and the epoxy primer increases with the increase of DAMO content, but the excessive DAMO content will decrease the fracture strength of the tie-coating and decrease the quality of the coating. When the DAMO content in tie-coating is 1.97 wt.%, the tie-coating performs excellent in the interlaminar adhesion, shear strength and mechanical properties.
Hongyang Zhang; Yuhong Qi; Zhanping Zhang; Qiang Yang. Effect of N-(2-Aminoethyl)-3-aminopropyltrimethoxysilane on the Adhesion of the Modified Silicone Tie-Coating to Epoxy Primer. Coatings 2021, 11, 71 .
AMA StyleHongyang Zhang, Yuhong Qi, Zhanping Zhang, Qiang Yang. Effect of N-(2-Aminoethyl)-3-aminopropyltrimethoxysilane on the Adhesion of the Modified Silicone Tie-Coating to Epoxy Primer. Coatings. 2021; 11 (1):71.
Chicago/Turabian StyleHongyang Zhang; Yuhong Qi; Zhanping Zhang; Qiang Yang. 2021. "Effect of N-(2-Aminoethyl)-3-aminopropyltrimethoxysilane on the Adhesion of the Modified Silicone Tie-Coating to Epoxy Primer." Coatings 11, no. 1: 71.
In this study, we explore the effect of phenylmethylsilicone oil (PSO) addition amount and viscosity in a fouling release coating based on polydimethylsiloxane (PDMS). The surface properties, mechanical properties, anti-fouling and drag-reduction performance of the coating were studied. Meanwhile the influence of the basic properties of the coating on the anti-fouling and drag-reduction performance was also studied. Subsequently, the antifouling performance of the coating was investigated by the Navicula Tenera and bacteria adhesion test. As a result, the high content of PSO paint has a high foul removal rate. The incorporation of PSO into paint can reduce the elastic modulus and surface energy of the coating to reduce its relative adhesion factor (RAF). The lower the RAF, the better the antifouling effect of the coating. The drag-reduction performance of the coating was verified by the torque selection experiment, and the results showed that incorporation of PSO into paint can enhance the elongation and hydrophobicity of the coating, thereby increasing the drag reduction rate of the coating.
Qiang Yang; Zhanping Zhang; Yuhong Qi; Hongyang Zhang. Influence of Phenylmethylsilicone Oil on Anti-Fouling and Drag-Reduction Performance of Silicone Composite Coatings. Coatings 2020, 10, 1239 .
AMA StyleQiang Yang, Zhanping Zhang, Yuhong Qi, Hongyang Zhang. Influence of Phenylmethylsilicone Oil on Anti-Fouling and Drag-Reduction Performance of Silicone Composite Coatings. Coatings. 2020; 10 (12):1239.
Chicago/Turabian StyleQiang Yang; Zhanping Zhang; Yuhong Qi; Hongyang Zhang. 2020. "Influence of Phenylmethylsilicone Oil on Anti-Fouling and Drag-Reduction Performance of Silicone Composite Coatings." Coatings 10, no. 12: 1239.
To study the effect of weld and defects on the corrosion behavior of nickel aluminum bronze (UNS C95810) in 3.5% NaCl solution, the weight loss, X-ray diffraction, optical microscope, scanning electron microscope and electrochemical test of the specimen with weld and defects were investigated. The results show that the presence of weld and defects increases the corrosion rate of bronze. Weld does not change the structure of the corrosion product film, but defects induce a lack of the protective outermost corrosion product in bronze. Weld makes the corrosion product film in the early stage more porous. Defects always produce an increase in the dissolution rate of the bronze.
Xu Zhao; Yuhong Qi; Jintao Wang; Tianxiang Peng; Zhanping Zhang; Kejiao Li. Effect of Weld and Surface Defects on the Corrosion Behavior of Nickel Aluminum Bronze in 3.5% NaCl Solution. Metals 2020, 10, 1227 .
AMA StyleXu Zhao, Yuhong Qi, Jintao Wang, Tianxiang Peng, Zhanping Zhang, Kejiao Li. Effect of Weld and Surface Defects on the Corrosion Behavior of Nickel Aluminum Bronze in 3.5% NaCl Solution. Metals. 2020; 10 (9):1227.
Chicago/Turabian StyleXu Zhao; Yuhong Qi; Jintao Wang; Tianxiang Peng; Zhanping Zhang; Kejiao Li. 2020. "Effect of Weld and Surface Defects on the Corrosion Behavior of Nickel Aluminum Bronze in 3.5% NaCl Solution." Metals 10, no. 9: 1227.
In order to develop waterborne silicate anticorrosive coatings to replace solvent-based anticorrosive coatings used widely in the shipping industry, epoxy modified silicate emulsions were synthesized with different contents of epoxy resin, then aqueous silicate zinc-rich coatings were prepared with the synthesized silicate emulsion, triethylamine, and zinc powder. The influence of the content of epoxy on the properties and chemical structure of the modified emulsion, mechanical properties of the silicate coatings, and corrosion behavior of the silicate zinc-rich coatings in 3.5% NaCl solution were investigated. The coating samples on steel were measured by the immersion test, Tafel polarization test, and electrochemical impedance spectroscopy (EIS) test with different immersion times. The results showed that epoxy modified silicate emulsions were successfully synthesized. With the increase in epoxy content, the viscosity and solid content of the modified emulsion increased, the impact resistance of the silicate coating rose, the pencil hardness decreased, but the adhesion was not affected. Epoxy modification can reduce, to a certain extent, the corrosion driving force of the zinc rich coating and increase the impedance of the zinc-rich coating, which decreases with the increase of immersion time in 3.5% NaCl solution. With the increase in the epoxy content, the impedance value of the zinc-rich coating increases, indicating that the ability of the coating to resist corrosive media is enhanced.
Jingtao Wang; Yuhong Qi; Xu Zhao; Zhanping Zhang. Electrochemical Investigation of Corrosion Behavior of Epoxy Modified Silicate Zinc-Rich Coatings in 3.5% NaCl Solution. Coatings 2020, 10, 444 .
AMA StyleJingtao Wang, Yuhong Qi, Xu Zhao, Zhanping Zhang. Electrochemical Investigation of Corrosion Behavior of Epoxy Modified Silicate Zinc-Rich Coatings in 3.5% NaCl Solution. Coatings. 2020; 10 (5):444.
Chicago/Turabian StyleJingtao Wang; Yuhong Qi; Xu Zhao; Zhanping Zhang. 2020. "Electrochemical Investigation of Corrosion Behavior of Epoxy Modified Silicate Zinc-Rich Coatings in 3.5% NaCl Solution." Coatings 10, no. 5: 444.
To study the effect of cast defects on the corrosion behavior and mechanism of the UNS C95810 alloy in seawater, an investigation was conducted by weight loss determination, scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), X-ray diffraction (XRD) and electrochemical testing of the specimen with and without cast defects on the surface. The results show that the corrosion rate of the alloy with cast defects is higher than that of the alloy without cast defects, but the defects do not change the composition of the resulting corrosion products. The defects increase the complexity of the alloy microstructure and the tendency toward galvanic corrosion, which reduce the corrosion potential from −3.83 to −86.31 mV and increase the corrosion current density from 0.228 to 0.23 μA⋅cm−2.
Xu Zhao; Yuhong Qi; Jintao Wang; Zhanping Zhang; Jing Zhu; Linlin Quan; Dachuan He. Effect of Cast Defects on the Corrosion Behavior and Mechanism of UNS C95810 Alloy in Artificial Seawater. Materials 2020, 13, 1790 .
AMA StyleXu Zhao, Yuhong Qi, Jintao Wang, Zhanping Zhang, Jing Zhu, Linlin Quan, Dachuan He. Effect of Cast Defects on the Corrosion Behavior and Mechanism of UNS C95810 Alloy in Artificial Seawater. Materials. 2020; 13 (7):1790.
Chicago/Turabian StyleXu Zhao; Yuhong Qi; Jintao Wang; Zhanping Zhang; Jing Zhu; Linlin Quan; Dachuan He. 2020. "Effect of Cast Defects on the Corrosion Behavior and Mechanism of UNS C95810 Alloy in Artificial Seawater." Materials 13, no. 7: 1790.
Three-component waterborne silicone antifouling coatings, which could cured at room temperature, were prepared, respectively, with cationic (stearyl trimethyl ammonium bromide) or anionic (sodium dodecyl benzene sulfonate) silicone emulsion as a film-forming substance, γ-methacryloxypropyltrimethoxysilane as a curing agent and dibutyltin dilaurate as a catalyst. The effect of emulsifier on the structure and properties of silicone coating was studied. The results showed that the coating with cationic silicone emulsion had high crosslinking density, and its surface is smooth. The surface of the coating prepared by the anionic silicone emulsion is rough. Emulsifier type had no obvious effect on the surface free energy of the waterborne silicone coating. The coatings have the characteristics of low surface energy and excellent bacterial desorption properties. Stearyl trimethyl ammonium bromide in the cured coating can reduce the adhesion of marine bacteria on the coating surface. Both the emulsifiers can inhibit the activity of Navicula Tenera. The waterborne silicone coating prepared by cationic silicone emulsion has better comprehensive mechanical properties and antifouling performance.
Sikui Liu; Zhanping Zhang; Yuhong Qi. Effect of Emulsifier on the Structure and Properties of Waterborne Silicone Antifouling Coating. Coatings 2020, 10, 168 .
AMA StyleSikui Liu, Zhanping Zhang, Yuhong Qi. Effect of Emulsifier on the Structure and Properties of Waterborne Silicone Antifouling Coating. Coatings. 2020; 10 (2):168.
Chicago/Turabian StyleSikui Liu; Zhanping Zhang; Yuhong Qi. 2020. "Effect of Emulsifier on the Structure and Properties of Waterborne Silicone Antifouling Coating." Coatings 10, no. 2: 168.
This study addresses the issue of enhancing the mechanical properties and adhesion of silicone antifouling coatings. In this paper, γ-aminopropyltriethoxysilane was used to pretreat bisphenol A epoxy resin to obtain epoxy-silicone prepolymer, which was then mixed with hydroxyl-terminated polydimethylsiloxane to obtain epoxy-modified silicone. It was cured with polyamide curing agent and dibutyltin dilaurate catalyst to form film, and a three-component epoxy-modified silicone coating was prepared. Fourier transform infrared (FTIR) spectroscopy was used to characterize its chemical structure. The effects of epoxy content on the surface properties, mechanical properties and antibacterial properties of the coatings were characterized by confocal laser scanning microscope (CLSM), contact angle measurements, tensile test and bacterial adhesion test. The results show that adding epoxy makes the adhesion of the coating at level 1 and the surface free energy of the coating was between 15–21 mJ/m2. When its content is less than 22.1 wt %, the coating is in a ductile material state. Once it is higher than 22.1 wt %, the coating was in a brittle material state. As the content increases, material’s hardness and fracture strength increases; elastic modulus decreases first and then increases, but bacteria removal rate decreases. The modification of the epoxy to silicone can effectively improve the adhesion and mechanical properties of the coating, while maintaining the characteristics of the low surface of the coating. It plays a positive role in improving the performance of silicone antifouling coatings.
Ruikang Zhao; Zhanping Zhang; Yuhong Qi. Influence of Epoxy Content on the Properties and Marine Bacterial Adhesion of Epoxy Modified Silicone Coatings. Coatings 2020, 10, 126 .
AMA StyleRuikang Zhao, Zhanping Zhang, Yuhong Qi. Influence of Epoxy Content on the Properties and Marine Bacterial Adhesion of Epoxy Modified Silicone Coatings. Coatings. 2020; 10 (2):126.
Chicago/Turabian StyleRuikang Zhao; Zhanping Zhang; Yuhong Qi. 2020. "Influence of Epoxy Content on the Properties and Marine Bacterial Adhesion of Epoxy Modified Silicone Coatings." Coatings 10, no. 2: 126.
Waterborne silicate composite coatings were prepared to replace existing solvent-based coatings for ships. A series of complex coatings were prepared by adding anticorrosive pigments to the silicate resin. Adhesion, pencil hardness, and impact resistance were investigated, and corrosion performance in 3.5% NaCl solution was measured by electrochemical impedance spectroscopy (EIS). The results show that adhesion and impact resistance are high, and that pencil hardness can reach 4H. The curing mechanism for the coatings were investigated by Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The mechanism of curing reaction in the studied waterborne silicate paint was found to be different from that reported in the literature. When the coatings were immersed in 3.5% NaCl solution for 8 h, there is only one time constant in the Bode plot, and coating capacitance (Qc) gradually increases while coating resistance (Rc) gradually decreases. Glass flake composite coatings have better corrosion resistance by comprehensive comparison of Qc and Rc.
Xu Zhao; Yuhong Qi; Zhanping Zhang; Kejiao Li. The Influence of Glass Flake and Micaceous Iron Oxide on Electrochemical Corrosion Performance of Waterborne Silicate Coatings in 3.5% NaCl Solution. Coatings 2019, 9, 833 .
AMA StyleXu Zhao, Yuhong Qi, Zhanping Zhang, Kejiao Li. The Influence of Glass Flake and Micaceous Iron Oxide on Electrochemical Corrosion Performance of Waterborne Silicate Coatings in 3.5% NaCl Solution. Coatings. 2019; 9 (12):833.
Chicago/Turabian StyleXu Zhao; Yuhong Qi; Zhanping Zhang; Kejiao Li. 2019. "The Influence of Glass Flake and Micaceous Iron Oxide on Electrochemical Corrosion Performance of Waterborne Silicate Coatings in 3.5% NaCl Solution." Coatings 9, no. 12: 833.
The anticorrosive composite coatings based on waterborne silicate were prepared to replace existing solvent-based coatings suitable for ships. A series of composite coatings were prepared by adding zinc powder and micaceous iron oxide to the waterborne silicate resin. The adhesion, pencil hardness and impact resistance of the coatings were investigated and corrosion performance in seawater is characterized by electrochemical impedance spectroscopy (EIS). The results show that coatings have excellent adhesion and impact resistance and their pencil hardness can reach up to 4H. During the immersion of composite coatings in seawater for 8 h, only one time constant appears in the Bode plot, coating capacitance (Qc) gradually increases but dispersion coefficient (n) and coating resistance (Rc) gradually decrease. The breakpoint frequency formula was deduced, considering the dispersion effect. With the increase of micaceous iron oxide, the fluctuation of breakpoint frequency with immersion time is weakened. It can be used to evaluate the corrosion resistance of inorganic anticorrosive coatings in seawater. In addition, different penetration models of corrosive media were proposed for the coatings with low or high content of micaceous iron oxide.
Xu Zhao; Yuhong Qi; Zhanping Zhang; Li. Electrochemical Impedance Spectroscopy Investigation on the Corrosive Behaviour of Waterborne Silicate Micaceous Iron Oxide Coatings in Seawater. Coatings 2019, 9, 415 .
AMA StyleXu Zhao, Yuhong Qi, Zhanping Zhang, Li. Electrochemical Impedance Spectroscopy Investigation on the Corrosive Behaviour of Waterborne Silicate Micaceous Iron Oxide Coatings in Seawater. Coatings. 2019; 9 (7):415.
Chicago/Turabian StyleXu Zhao; Yuhong Qi; Zhanping Zhang; Li. 2019. "Electrochemical Impedance Spectroscopy Investigation on the Corrosive Behaviour of Waterborne Silicate Micaceous Iron Oxide Coatings in Seawater." Coatings 9, no. 7: 415.
Polydimethylsiloxane (PDMS) could be used to improve the antifouling properties of the fouling release coatings based on polyurethane (PU). A series of polydimethylsiloxane-modified polyurethane coatings were synthesized with various PDMS contents, using the solvent-free method. The effects of PDMS content and seawater immersion on the chain structure and surface morphology were investigated by confocal laser scanning microscopy (CLSM), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and X-ray diffraction (XRD). Based on the measurements of contact angles of deionized water and diiodomethane, surface free energies of the coatings were estimated according to the Owens two-liquid method. The PDMS-modified polyurethane exhibited lower surface free energy and a lower glass transition temperature than polyurethane. The presence of PDMS increased the degree of microphase separation, and enhanced the water resistance of the coatings. The optimum amount of PDMS reduced the elastic modulus and increased the ductility of the coating. The presence of PDMS benefited the removal of weakly attached organisms. Panel tests in the Yellow Sea demonstrated the antifouling activity of the PDMS-modified polyurethane.
Zhan-Ping Zhang; Xiao-Fei Song; Li-Ying Cui; Yu-Hong Qi. Synthesis of Polydimethylsiloxane-Modified Polyurethane and the Structure and Properties of Its Antifouling Coatings. Coatings 2018, 8, 157 .
AMA StyleZhan-Ping Zhang, Xiao-Fei Song, Li-Ying Cui, Yu-Hong Qi. Synthesis of Polydimethylsiloxane-Modified Polyurethane and the Structure and Properties of Its Antifouling Coatings. Coatings. 2018; 8 (5):157.
Chicago/Turabian StyleZhan-Ping Zhang; Xiao-Fei Song; Li-Ying Cui; Yu-Hong Qi. 2018. "Synthesis of Polydimethylsiloxane-Modified Polyurethane and the Structure and Properties of Its Antifouling Coatings." Coatings 8, no. 5: 157.
In this study, phenylmethylsilicone oil (PSO) with different viscosity was used for research in fouling release coatings based on polydimethylsiloxane (PDMS). The surface properties and mechanical properties of the coatings were investigated, while the leaching behavior of PSO from the coatings was studied. Subsequently, the antifouling performance of the coatings was investigated by the benthic diatom adhesion test. The results showed that the coatings with high-viscosity PSO exhibited high levels of hydrophobicity and PSO leaching, while the high PSO content significantly decreased the elastic modulus of the coatings and prolonged the release time of PSO. The antifouling results indicated that the incorporation of PSO into coatings enhanced the antifouling performance of the coating by improving the coating hydrophobicity and decreasing the coating elastic modulus, while the leaching of PSO from the coatings improved the fouling removal rate of the coating. This suggests a double enhancement effect on the antifouling performance of fouling release coatings based on PDMS with PSO incorporated.
Miao Ba; Zhanping Zhang; Yuhong Qi. Fouling Release Coatings Based on Polydimethylsiloxane with the Incorporation of Phenylmethylsilicone Oil. Coatings 2018, 8, 153 .
AMA StyleMiao Ba, Zhanping Zhang, Yuhong Qi. Fouling Release Coatings Based on Polydimethylsiloxane with the Incorporation of Phenylmethylsilicone Oil. Coatings. 2018; 8 (5):153.
Chicago/Turabian StyleMiao Ba; Zhanping Zhang; Yuhong Qi. 2018. "Fouling Release Coatings Based on Polydimethylsiloxane with the Incorporation of Phenylmethylsilicone Oil." Coatings 8, no. 5: 153.
The influence of molecular ratio of monomers, reaction time, reaction temperature and solid content on the molecular weight of polyamide imides(PAI), heating rate, temperature and time on tensile properties of PAI film was investigated in detail. The results showed that when monomer molar ratio (MDI: TMA)R >1, PAI is an isocyanate terminated, intrinsic viscosity increases with the increase of R, reaches maximum value at R=1.06, then it decreases obviously. Contrarily, when R <1, PAI is terminated with anhydride, intrinsic viscosity increases with the decrease of R, its maximum value at R= 0.97, then it decreases with the decrease of R. The relation between intrinsic viscosityof PAI and reaction temperature, reaction time, solid content all follows the parabolic law. The optimal reaction temperature,reaction time, solid content is 140°C, 120 min, 30%. Therefore, the best synthesis process of the PAI is reacting for 120 min at 140°C when 30% solid content and R=1.06. Tensile strength and elongation increase with the increase of heating rate, curing temperature and curing time, after peak value, they decrease with the increase of heating rate, curing temperature andcuring time. The best curing process of the PAI is curing for 2h at 260°C and heating rate 100°C/h.
Yuhong Qi; Bingnan Ji; Li Li; Zhanping Zhang. Synthesis and curing process of TMA-MDI polyamide-imides. MATEC Web of Conferences 2017, 130, 7007 .
AMA StyleYuhong Qi, Bingnan Ji, Li Li, Zhanping Zhang. Synthesis and curing process of TMA-MDI polyamide-imides. MATEC Web of Conferences. 2017; 130 ():7007.
Chicago/Turabian StyleYuhong Qi; Bingnan Ji; Li Li; Zhanping Zhang. 2017. "Synthesis and curing process of TMA-MDI polyamide-imides." MATEC Web of Conferences 130, no. : 7007.
Particles can be used to improve the mechanical properties of fouling release coatings based on polydimethylsiloxane (PDMS). In this study, coatings were prepared by high speed stirring using seven types of particles, with different particle size from nanometer to micrometer. The influence of specific surface area of the particles on the dispersion tolerance was investigated. The results showed that the dispersion tolerance of particles in PDMS decreased with the increase in specific surface area of the particle, and for nano particles, the factor most affecting the dispersion tolerance was the specific surface area of agglomerate particle. Subsequently, the surface properties, mechanical properties, and biofilm adhesion assay of coatings were investigated. Results indicated that surface roughness increased with the increase of dispersion tolerance. Surface roughness of samples improved the hydrophobicity of samples, yet the polar chemical group of nano silica and fumed silica reduced the hydrophobicity of samples. Further, particles could enhance the mechanical properties of coating, especially nano particles. Compared to the coating without particle, biofilm adhesion performance of coating with particles decreased, which was determined by the increase of the elastic modulus and surface roughness of coatings.
Miao Ba; Zhanping Zhang; Yuhong Qi. The Dispersion Tolerance of Micro/Nano Particle in Polydimethylsiloxane and Its Influence on the Properties of Fouling Release Coatings Based on Polydimethylsiloxane. Coatings 2017, 7, 107 .
AMA StyleMiao Ba, Zhanping Zhang, Yuhong Qi. The Dispersion Tolerance of Micro/Nano Particle in Polydimethylsiloxane and Its Influence on the Properties of Fouling Release Coatings Based on Polydimethylsiloxane. Coatings. 2017; 7 (7):107.
Chicago/Turabian StyleMiao Ba; Zhanping Zhang; Yuhong Qi. 2017. "The Dispersion Tolerance of Micro/Nano Particle in Polydimethylsiloxane and Its Influence on the Properties of Fouling Release Coatings Based on Polydimethylsiloxane." Coatings 7, no. 7: 107.
Yan Zhang; Yuhong Qi; Zhanping Zhang. Synthesis of PPG-TDI-BDO polyurethane and the influence of hard segment content on its structure and antifouling properties. Progress in Organic Coatings 2016, 97, 115 -121.
AMA StyleYan Zhang, Yuhong Qi, Zhanping Zhang. Synthesis of PPG-TDI-BDO polyurethane and the influence of hard segment content on its structure and antifouling properties. Progress in Organic Coatings. 2016; 97 ():115-121.
Chicago/Turabian StyleYan Zhang; Yuhong Qi; Zhanping Zhang. 2016. "Synthesis of PPG-TDI-BDO polyurethane and the influence of hard segment content on its structure and antifouling properties." Progress in Organic Coatings 97, no. : 115-121.
A new kind of polyurethane was synthesized using 2,4-toluene diisocyanate (TDI) as the hard segment and polyether polyols as the soft segment. The influence of hard segment content on the self-healing ability of polyurethane was investigated by testing tensile strength and elongation healing rates after contact together for one week. Tensile test results indicate that the intrinsic healing capability of the polyurethane at room temperature decreased with an increasing hard segment content, and was lost when it reached fifty percent. Fracture morphologies of polyurethane were observed by confocal laser scanning microscopy, showing that roughness increased with an increasing hard segment content due to increased cross-link density and restraining of segment motion. The self-healing capability of this TDI polyurethane can be attributed to reversible H-bonds and to the mobility of the soft segment at room temperature. Segment mobility is a prerequisite of being able to self-heal.
Yan Zhang; Yu-Hong Qi; Zhan-Ping Zhang. The influence of 2,4-toluene diisocyanate content on the intrinsic self-healing performance of polyurethane at room-temperature. Journal of Polymer Research 2015, 22, 1 -6.
AMA StyleYan Zhang, Yu-Hong Qi, Zhan-Ping Zhang. The influence of 2,4-toluene diisocyanate content on the intrinsic self-healing performance of polyurethane at room-temperature. Journal of Polymer Research. 2015; 22 (5):1-6.
Chicago/Turabian StyleYan Zhang; Yu-Hong Qi; Zhan-Ping Zhang. 2015. "The influence of 2,4-toluene diisocyanate content on the intrinsic self-healing performance of polyurethane at room-temperature." Journal of Polymer Research 22, no. 5: 1-6.
This chapter contains sections titled: Introduction Experimental Materials and Methods Results and Discussions Acknowledgements
Zhanping Zhang; Yuhong Qi; Hongbo Zhai. Surface Characteristics and Electric Conductivity of MWCNTs/FEVE Copolymer Composite Coatings. PRICM 2013, 2117 -2122.
AMA StyleZhanping Zhang, Yuhong Qi, Hongbo Zhai. Surface Characteristics and Electric Conductivity of MWCNTs/FEVE Copolymer Composite Coatings. PRICM. 2013; ():2117-2122.
Chicago/Turabian StyleZhanping Zhang; Yuhong Qi; Hongbo Zhai. 2013. "Surface Characteristics and Electric Conductivity of MWCNTs/FEVE Copolymer Composite Coatings." PRICM , no. : 2117-2122.