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Jinping Zhou
College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, China

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Journal article
Published: 27 May 2021 in Molecules
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Water-soluble cellulose ethers are widely used as stabilizers, thickeners, and viscosity modifiers in many industries. Understanding rheological behavior of the polymers is of great significance to the effective control of their applications. In this work, a series of cyanoethylcellulose (CEC) samples with different molecular weights were prepared with cellulose and acrylonitrile in NaOH/urea aqueous solution under the homogeneous reaction. The rheological properties of water-soluble CECs as a function of concentration and molecular weight were investigated using shear viscosity and dynamic rheological measurements. Viscoelastic behaviors have been successfully described by the Carreau model, the Ostwald-de-Waele equation, and the Cox–Merz rule. The entanglement concentrations were determined to be 0.6, 0.85, and 1.5 wt% for CEC-11, CEC-7, and CEC-3, respectively. All of the solutions exhibited viscous behavior rather than a clear sol-gel transition in all tested concentrations. The heterogeneous nature of CEC in an aqueous solution was determined from the Cox–Merz rule due to the coexistence of single chain complexes and aggregates. In addition, the CEC aqueous solutions showed good thermal and time stability, and the transition with temperature was reversible.

ACS Style

Qian Li; Yuehu Li; Zehua Jin; Yujie Li; Yifan Chen; Jinping Zhou. Viscoelasticity and Solution Stability of Cyanoethylcellulose with Different Molecular Weights in Aqueous Solution. Molecules 2021, 26, 3201 .

AMA Style

Qian Li, Yuehu Li, Zehua Jin, Yujie Li, Yifan Chen, Jinping Zhou. Viscoelasticity and Solution Stability of Cyanoethylcellulose with Different Molecular Weights in Aqueous Solution. Molecules. 2021; 26 (11):3201.

Chicago/Turabian Style

Qian Li; Yuehu Li; Zehua Jin; Yujie Li; Yifan Chen; Jinping Zhou. 2021. "Viscoelasticity and Solution Stability of Cyanoethylcellulose with Different Molecular Weights in Aqueous Solution." Molecules 26, no. 11: 3201.

Research article
Published: 17 May 2021 in ACS Applied Materials & Interfaces
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Herein, a new type of injectable carboxymethyl chitosan (CMCh) hydrogel wound dressing with self-healing properties is constructed. First, CMCh samples are homogeneously synthesized in alkali/urea aqueous solutions. Subsequently, trivalent metal ions of Fe3+ and Al3+ are introduced to form coordination bonds with CMCh, leading to an ultrafast gelation process. A series of hydrogels can be obtained by altering the concentration of CMCh and the relative content of metal ions. Owing to the dynamic and reversible characteristics of the coordination bonds, the hydrogel exhibits self-healing, self-adaption, and thermoresponsive ability. Moreover, due to the interaction between the amino groups on CMCh and SO42–, the hydrogel undergoes phase separation and can be painlessly detached from the skin with little residue. Taking advantage of all these characteristics, the hydrogel is used as a wound dressing and can significantly accelerate skin tissue regeneration and wound closure. This hydrogel has great potential in the application of tissue engineering.

ACS Style

Jinfeng Cao; Ping Wu; Qianqian Cheng; Chen He; Yun Chen; Jinping Zhou. Ultrafast Fabrication of Self-Healing and Injectable Carboxymethyl Chitosan Hydrogel Dressing for Wound Healing. ACS Applied Materials & Interfaces 2021, 13, 24095 -24105.

AMA Style

Jinfeng Cao, Ping Wu, Qianqian Cheng, Chen He, Yun Chen, Jinping Zhou. Ultrafast Fabrication of Self-Healing and Injectable Carboxymethyl Chitosan Hydrogel Dressing for Wound Healing. ACS Applied Materials & Interfaces. 2021; 13 (20):24095-24105.

Chicago/Turabian Style

Jinfeng Cao; Ping Wu; Qianqian Cheng; Chen He; Yun Chen; Jinping Zhou. 2021. "Ultrafast Fabrication of Self-Healing and Injectable Carboxymethyl Chitosan Hydrogel Dressing for Wound Healing." ACS Applied Materials & Interfaces 13, no. 20: 24095-24105.

Journal article
Published: 30 March 2021 in Polymers
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The dissolution and molecular interactions of cellulose carbamate (CC) in NaOH/ZnO aqueous solutions were studied using optical microscopy, differential scanning calorimetry (DSC), 1H NMR, dynamic light scattering (DLS), atomic force microscopy (AFM), transmission electron microscopy (TEM), and molecular dynamic simulation. The dissolution of CC in NaOH/ZnO aqueous solutions using the freezing–thawing method was an exothermic process, and the lower temperature was favorable for the dissolution of CC. ZnO dissolved in NaOH aqueous solutions with the formation of Zn(OH)4 2−, and no free Zn2+ ions existed in the solvents. NaOH/Na2Zn(OH)4 system formed strong interactions with the hydroxyl groups of CC to improve its solubility and the stability of CC solution. The results indicate that 7 wt% NaOH/1.6 wt% ZnO aqueous solution was the most appropriate solvent for the dissolution of CC. This work revealed the dissolution interaction of CC-NaOH/ZnO solutions, which is beneficial for the industrialization of the CarbaCell process.

ACS Style

Yanhui Kang; Fangyu Wang; Zeming Zhang; Jinping Zhou. Dissolution and Interaction of Cellulose Carbamate in NaOH/ZnO Aqueous Solutions. Polymers 2021, 13, 1092 .

AMA Style

Yanhui Kang, Fangyu Wang, Zeming Zhang, Jinping Zhou. Dissolution and Interaction of Cellulose Carbamate in NaOH/ZnO Aqueous Solutions. Polymers. 2021; 13 (7):1092.

Chicago/Turabian Style

Yanhui Kang; Fangyu Wang; Zeming Zhang; Jinping Zhou. 2021. "Dissolution and Interaction of Cellulose Carbamate in NaOH/ZnO Aqueous Solutions." Polymers 13, no. 7: 1092.

Journal article
Published: 09 February 2021 in Carbohydrate Polymers
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Wound healing is a dynamic and intricate process, and newly dressings are urgently needed to promote wound healing over the multiple stages. Herein, two water-soluble adenine-modified chitosan (CS-A) derivatives were synthesized in aqueous solutions and freeze-dried to obtain porous sponge-like dressings. The novel derivatives displayed antibacterial activities against S. aureus and E. coli. Moreover, CS-A derivatives demonstrated excellent hemocompatibility and cytocompatibility, as well as promoted the proliferation of the wound cells by shortening the G1 phase and improving DNA duplication efficiency. The ability of CS-A sponges to promote wound healing was studied in a full-thickness skin defect model. The histological analysis and immunohistochemical staining showed that the wounds treated with CS-A sponges displayed fewer inflammatory cells, and faster regeneration of epithelial tissue, collagen deposition and neovascularization. Therefore, CS-A derivatives have potential application in wound dressings and provide new ideas for the design of multifunctional biomaterials.

ACS Style

Pengpeng Deng; Wenyi Jin; Zilin Liu; Mingyong Gao; Jinping Zhou. Novel multifunctional adenine-modified chitosan dressings for promoting wound healing. Carbohydrate Polymers 2021, 260, 117767 .

AMA Style

Pengpeng Deng, Wenyi Jin, Zilin Liu, Mingyong Gao, Jinping Zhou. Novel multifunctional adenine-modified chitosan dressings for promoting wound healing. Carbohydrate Polymers. 2021; 260 ():117767.

Chicago/Turabian Style

Pengpeng Deng; Wenyi Jin; Zilin Liu; Mingyong Gao; Jinping Zhou. 2021. "Novel multifunctional adenine-modified chitosan dressings for promoting wound healing." Carbohydrate Polymers 260, no. : 117767.

Journal article
Published: 12 January 2021 in Carbohydrate Polymers
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Avoiding wound infections is a major challenge in wound care management, and new materials are urgently needed to address these problems. Herein, four water-soluble thymine-modified chitosan (TC) derivatives with the degree of substitution (DS) ranging from 0.23 to 0.62 were synthesized and freeze-dried to obtain porous sponge dressings. TC derivatives had broad-spectrum antibacterial activities against gram-negative bacteria, gram-positive bacteria, fungi, drug-resistance bacteria, Pseudomonas aeruginosa and Acinetobacter baumannii. Especially, the antioxidant and antibacterial properties of TC derivatives increased with increasing DS. Furthermore, TC derivatives showed excellent biocompatibility and blood compatibility. TC sponges could significantly accelerate the wound healing process than gauze and chitosan sponge. The histological analysis and immunohistochemical staining showed that the wounds treated with TC sponges displayed fewer inflammatory cells, and faster regeneration of epithelial tissue, collagen deposition and new blood vessel formation speed. Therefore, TC sponges can shed new light for wound dressing design.

ACS Style

Pengpeng Deng; Juanjuan Chen; Lichao Yao; Pingan Zhang; Jinping Zhou. Thymine-modified chitosan with broad-spectrum antimicrobial activities for wound healing. Carbohydrate Polymers 2021, 257, 117630 .

AMA Style

Pengpeng Deng, Juanjuan Chen, Lichao Yao, Pingan Zhang, Jinping Zhou. Thymine-modified chitosan with broad-spectrum antimicrobial activities for wound healing. Carbohydrate Polymers. 2021; 257 ():117630.

Chicago/Turabian Style

Pengpeng Deng; Juanjuan Chen; Lichao Yao; Pingan Zhang; Jinping Zhou. 2021. "Thymine-modified chitosan with broad-spectrum antimicrobial activities for wound healing." Carbohydrate Polymers 257, no. : 117630.

Research article
Published: 11 January 2021 in ACS Applied Bio Materials
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Chitin and chitosan have been extensively used as wound dressings because of their special functions to promote wound healing. However, there was little focus on the effects of the degree of acetylation (DA) on wound healing. In this work, the regenerated chitin nonwoven fabrics with DA values of 90, 71, 60, and 42% were prepared, and the morphology and physical performances of the fabrics were characterized. Moreover, the effects of DA of the chitin nonwoven fabrics on wound recovery were studied with a full-thickness skin defect model in rats. In vitro experiments indicated that the chitin nonwoven fabrics exhibited good biocompatibility and blood compatibility and a low blood-clotting index (BCI). In vivo experiments revealed that the chitin nonwoven fabrics could accelerate wound healing more effectively than gauze by promoting re-epithelialization and collagen deposition as well as by stimulating neovascularization. The results of the wound healing process showed that DA of the chitin nonwoven fabrics had a profound effect on promoting wound healing. Notably, the regenerated chitin nonwoven fabrics with 71% DA significantly improved the wound healing compared to the commercial wound dressing Algoplaque film. Therefore, the regenerated chitin nonwoven fabrics are promising candidates for wound healing.

ACS Style

Chen He; Meifang Ke; Zibiao Zhong; Qifa Ye; Liu He; Yun Chen; Jinping Zhou. Effect of the Degree of Acetylation of Chitin Nonwoven Fabrics for Promoting Wound Healing. ACS Applied Bio Materials 2021, 4, 1833 -1842.

AMA Style

Chen He, Meifang Ke, Zibiao Zhong, Qifa Ye, Liu He, Yun Chen, Jinping Zhou. Effect of the Degree of Acetylation of Chitin Nonwoven Fabrics for Promoting Wound Healing. ACS Applied Bio Materials. 2021; 4 (2):1833-1842.

Chicago/Turabian Style

Chen He; Meifang Ke; Zibiao Zhong; Qifa Ye; Liu He; Yun Chen; Jinping Zhou. 2021. "Effect of the Degree of Acetylation of Chitin Nonwoven Fabrics for Promoting Wound Healing." ACS Applied Bio Materials 4, no. 2: 1833-1842.

Review article
Published: 14 December 2020 in ACS Nano
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Nanocellulose, the most abundant crystalline polysaccharide nanomaterial on Earth, has been widely used for the reinforcement of polymeric materials owing to its high elastic modulus, low density, high aspect ratio, biocompatibility, and biodegradability. In this Perspective, we offer a brief overview of recent progress in the controllable arrangement of nanocellulose in polymeric matrices, including highly oriented structure, helical structure, and gradient structure. We then discuss the current nanotechnologies that enable the arrangement of nanocellulose in nanocomposite materials. Finally, we describe future opportunities, challenges, and research directions in this active research area.

ACS Style

Na Peng; Da Huang; Chen Gong; Yixiang Wang; Jinping Zhou; Chunyu Chang. Controlled Arrangement of Nanocellulose in Polymeric Matrix: From Reinforcement to Functionality. ACS Nano 2020, 14, 16169 -16179.

AMA Style

Na Peng, Da Huang, Chen Gong, Yixiang Wang, Jinping Zhou, Chunyu Chang. Controlled Arrangement of Nanocellulose in Polymeric Matrix: From Reinforcement to Functionality. ACS Nano. 2020; 14 (12):16169-16179.

Chicago/Turabian Style

Na Peng; Da Huang; Chen Gong; Yixiang Wang; Jinping Zhou; Chunyu Chang. 2020. "Controlled Arrangement of Nanocellulose in Polymeric Matrix: From Reinforcement to Functionality." ACS Nano 14, no. 12: 16169-16179.

Communication
Published: 18 November 2020 in Macromolecular Rapid Communications
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Functional polymer, especially the one based on renewable and sustainable materials, has attracted increasing attention to satisfy the growing demand for the design of stimuli‐responsive devices. Methylcellulose (MC) is a water‐soluble derivative of cellulose, which has been widely used in many fields for its biocompatibility and biological inertness. In this work, MC is labeled by tetraphenylethylene (TPE) via azide–alkyne click reaction to obtain a fluorescent cellulose‐based derivative of MC‐TPE. The degree of substitution of MC‐TPE is determined to be 0.074, which can be self‐assembled into micelles in water with the size of 42 ± 6 nm. MC‐TPE shows thermoresponsivity and thermoreversibility in size, transmittance, and fluorescence, enabling it to work as a fluorescent thermosensor. Moreover, MC‐TPE exhibits nontoxicity and biocompatibility, allowing its application in MCF‐7 cell imaging. Therefore, this newly functional natural polymer shows promising potentials in the fields of sensing and bioimaging.

ACS Style

Haoying Wang; Fangyu Wang; Pengpeng Deng; Jinping Zhou. Synthesis and Fluorescent Thermoresponsive Properties of Tetraphenylethylene‐Labeled Methylcellulose. Macromolecular Rapid Communications 2020, 42, e2000497 .

AMA Style

Haoying Wang, Fangyu Wang, Pengpeng Deng, Jinping Zhou. Synthesis and Fluorescent Thermoresponsive Properties of Tetraphenylethylene‐Labeled Methylcellulose. Macromolecular Rapid Communications. 2020; 42 (3):e2000497.

Chicago/Turabian Style

Haoying Wang; Fangyu Wang; Pengpeng Deng; Jinping Zhou. 2020. "Synthesis and Fluorescent Thermoresponsive Properties of Tetraphenylethylene‐Labeled Methylcellulose." Macromolecular Rapid Communications 42, no. 3: e2000497.

Journal article
Published: 08 July 2020 in Nano Energy
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Hard carbon finds critical applications in potassium-ion batteries (PIBs) anodes because of its attractive advantages including low cost and high conductivity. However, the sluggish reaction kinetics and structural instability caused by large K+ intercalation/deintercalation limit their storage capability and cycling life. Herein, active sites enriched hard carbon porous nanobelts (NOCNBs) for enhanced K+ storage are constructed from mineralized shrimp shells via a self-template assisted pyrolysis strategy. The NOCNBs possess multiscale structure with hierarchical micro/meso/macro-pores, high-level pyrrolic/pyridinic-N and O dual-doping, and large interlayer spacing. Hence, the NOCNBs deliver a high capacity of 468 mAh g−1 at 50 mA g−1 and long cycling life (277 mAh g−1 at 1000 mA g−1 over 1600 cycles), representing one of the best storage capability and cycling stability among the reported carbonaceous electrodes. Density functional theory calculations and kinetic analysis demonstrate that the abundant active sites within NOCNBs can strengthen K adsorption and diffusion, facilitating capacitive-adsorbed storage. The in-situ X-ray diffraction reveals the potassium intercalation mechanism in hard carbon for the first time. Furthermore, they exhibit a superior capacity of 89 mAh g−1 at 100 mA g−1 for potassium dual-ion batteries (PDIBs). This work opens up a new avenue for constructing porous hard carbon to achieve excellent K+ storage.

ACS Style

Kai Zhang; Qiu He; Fangyu Xiong; Jinping Zhou; Yan Zhao; Liqiang Mai; Lina Zhang. Active sites enriched hard carbon porous nanobelts for stable and high-capacity potassium-ion storage. Nano Energy 2020, 77, 105018 .

AMA Style

Kai Zhang, Qiu He, Fangyu Xiong, Jinping Zhou, Yan Zhao, Liqiang Mai, Lina Zhang. Active sites enriched hard carbon porous nanobelts for stable and high-capacity potassium-ion storage. Nano Energy. 2020; 77 ():105018.

Chicago/Turabian Style

Kai Zhang; Qiu He; Fangyu Xiong; Jinping Zhou; Yan Zhao; Liqiang Mai; Lina Zhang. 2020. "Active sites enriched hard carbon porous nanobelts for stable and high-capacity potassium-ion storage." Nano Energy 77, no. : 105018.

Paper
Published: 30 May 2020 in Journal of Materials Chemistry B
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Self-healing and easy-to-shape mineralized hydrogels for iontronics were fabricated through physically cross-linked PVP and CaCO3.

ACS Style

Jinfeng Cao; Yanhui Kang; Xiaoqing Wu; Chen He; Jinping Zhou. Self-healing and easy-to-shape mineralized hydrogels for iontronics. Journal of Materials Chemistry B 2020, 8, 5921 -5927.

AMA Style

Jinfeng Cao, Yanhui Kang, Xiaoqing Wu, Chen He, Jinping Zhou. Self-healing and easy-to-shape mineralized hydrogels for iontronics. Journal of Materials Chemistry B. 2020; 8 (27):5921-5927.

Chicago/Turabian Style

Jinfeng Cao; Yanhui Kang; Xiaoqing Wu; Chen He; Jinping Zhou. 2020. "Self-healing and easy-to-shape mineralized hydrogels for iontronics." Journal of Materials Chemistry B 8, no. 27: 5921-5927.

Journal article
Published: 13 May 2020 in Carbohydrate Polymers
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A dual physically crosslinking (DPC) strategy is used to construct hydrogels with ultrahigh strength. First, polyelectrolyte complex (PEC) hydrogels were prepared through in situ polymerization of acrylic acid monomers in chitosan solutions. Subsequently, cations and anions were introduced into the PEC hydrogels to form strong electrostatic interactions with the polymer chains. The mechanical properties of the DPC hydrogels strongly depended on the ionic concentration and the valence state of the loading ions. The tensile strength of DPC-Na 8-20-2.0, DPC-Mg 8-20-2.0, DPCAl 8-20-2.0 and DPC-Sul 8-20-0.8 reached to 2.36, 12.59, 65.1 and 2.80 MPa, respectively, which were significantly higher than that of PEC 8-20 (0.29 MPa). Moreover, DPC-Na, DPC-Mg and DPC-Sul still maintained a good flexibility. Specifically, hydrogels of DPC-Ca exhibited ionic conductivity and freeze tolerance, which could be cooled to −20 °C without freezing. The DPC strategy opens an avenue to fabricate hydrogels with outstanding mechanical properties.

ACS Style

Jinfeng Cao; Yang Wang; Chen He; Yanhui Kang; Jinping Zhou. Ionically crosslinked chitosan/poly(acrylic acid) hydrogels with high strength, toughness and antifreezing capability. Carbohydrate Polymers 2020, 242, 116420 .

AMA Style

Jinfeng Cao, Yang Wang, Chen He, Yanhui Kang, Jinping Zhou. Ionically crosslinked chitosan/poly(acrylic acid) hydrogels with high strength, toughness and antifreezing capability. Carbohydrate Polymers. 2020; 242 ():116420.

Chicago/Turabian Style

Jinfeng Cao; Yang Wang; Chen He; Yanhui Kang; Jinping Zhou. 2020. "Ionically crosslinked chitosan/poly(acrylic acid) hydrogels with high strength, toughness and antifreezing capability." Carbohydrate Polymers 242, no. : 116420.

Original research
Published: 06 April 2020 in Cellulose
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Novel rhodamine-based fluorescence cellulose nanocrystals (RhB-CNCs) were synthesized and investigated as an effective naked-eye colorimetric and fluorescent sensor for detection of Hg2+ in aqueous solutions. RhB-CNCs were characterized by using FT-IR, XRD, XPS, TEM, AFM, ζ-potential measurements, dynamic laser light scattering (DLS), UV–vis absorption and fluorescence spectroscopy. The average dimension of RhB-CNCs was about 18–20 nm in width and 160–180 nm in length, which could be stably dispersed in aqueous solutions. RhB-CNCs were able to selectively recognize Hg2+ by “naked-eye” and spectroscopic method in aqueous solutions. The fluorescent and colorimetric detection limits were determined to be 232 nM and 746 nM, respectively. This sensor could function in the pH range of 3–12 and exhibited excellent interference immunity. By means of Benesi–Hildebrand plot, 1:1 binding stoichiometry was obtained, and the binding constant between RhB-CNCs and Hg2+ was found to be 4.15 × 105 M−1. The fluorescent-labeled CNCs can be readily used for selective and sensitive detection of Hg2+ in aqueous media and exhibit great potential applications for chemosening, bioimaging and sewage treatment. Novel rhodamine-based fluorescence cellulose nanocrystals were prepared and used as an effective naked-eye colorimetric and fluorescent sensor for detection of Hg2+ in aqueous solutions.

ACS Style

Xiu Ye; Yanhui Kang; Jinping Zhou. Rhodamine labeled cellulose nanocrystals as selective “naked-eye” colorimetric and fluorescence sensor for Hg2+ in aqueous solutions. Cellulose 2020, 27, 5197 -5210.

AMA Style

Xiu Ye, Yanhui Kang, Jinping Zhou. Rhodamine labeled cellulose nanocrystals as selective “naked-eye” colorimetric and fluorescence sensor for Hg2+ in aqueous solutions. Cellulose. 2020; 27 (9):5197-5210.

Chicago/Turabian Style

Xiu Ye; Yanhui Kang; Jinping Zhou. 2020. "Rhodamine labeled cellulose nanocrystals as selective “naked-eye” colorimetric and fluorescence sensor for Hg2+ in aqueous solutions." Cellulose 27, no. 9: 5197-5210.

Research article
Published: 16 January 2020 in ACS Applied Materials & Interfaces
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A transparent and flexible cellulose/KOH composite ionic film (CKF) is fabricated as humidity sensor. CKF exhibits high optical transmittance (87.14 % at 550 nm), which has rarely been reported among humidity sensors, due to the small pore size of cellulose matrix caused by water evaporation induced dense packing and uniform distribution of amorphous KOH via simply soaking-drying. CKF also possesses flexibility and robust mechanical property. The conductive CKF shows fast and reversible real time response to relative humidity (RH) in the 11.3~97.3 RH% range with conductance varies over 200 times, response/recovery times of 6.0/10.8 s which are shorter than majority of the reported values, as well as hysteresis error of 0.57 % which is significantly less than literatures. Furthermore, CKF is insensitive to both temperature (10~70 °C) and pressure (0~120 kPa), indicating high selectivity as humidity sensors. In both the noncontact fingertip moisture detection and breathing rate detection, the flexible and transparent CKF-based humidity sensor responds favorably to RH change. Moreover, a flexible and transparent CKF-based wearable skin moisture detector is assembled to measure the moisture of human skin in different situations, whose measurement is very close to the commercial detector. The results offer real-time moisture information of human skin, and demonstrate the potential of CKF-based moisture detector as a promising modular component in integrated intelligent wearable equipment.

ACS Style

Yang Wang; Lina Zhang; Jinping Zhou; Ang Lu. Flexible and Transparent Cellulose-Based Ionic Film as a Humidity Sensor. ACS Applied Materials & Interfaces 2020, 12, 7631 -7638.

AMA Style

Yang Wang, Lina Zhang, Jinping Zhou, Ang Lu. Flexible and Transparent Cellulose-Based Ionic Film as a Humidity Sensor. ACS Applied Materials & Interfaces. 2020; 12 (6):7631-7638.

Chicago/Turabian Style

Yang Wang; Lina Zhang; Jinping Zhou; Ang Lu. 2020. "Flexible and Transparent Cellulose-Based Ionic Film as a Humidity Sensor." ACS Applied Materials & Interfaces 12, no. 6: 7631-7638.

Journal article
Published: 04 December 2019 in Chemical Engineering Journal
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As a cost-efficient method for detecting analyses at trace level, chitosan-based surface-enhanced Raman scattering (SERS) sensor is a promising alternative. However, research on this technique is frequently hindered to complicated operations, dissatisfactory sensing and reproducible property. Herein, a biosynthesis of Au nanoparticles (NPs) was facially achieved through adding AuCl4 ions into a dissolved alkali chitosan dope without using any heating operation or extra reductant. Subsequently, through hydrogen bonds-driven self-assembly during the coagulation process, chitosan nanofibrils anchored with Au NPs grew into a three-dimensional (3D) architecture. Because of the well-dispersed Au NPs with a content of 0.91–2.78 wt% and emerged sub-10 nm nanogaps, the prepared Au-embedded chitosan ([email protected]) nanocomposite could serve as excellent SERS substrate. The enhancement factor approached 107 and spot-to-spot reproducibility could be as low as 5.66% for detecting 4-mercaptobenzoic acid (4-MBA). Besides, owing to the innate pH-sensitive characteristic, the SERS substrate demonstrated molecular-selective detection of charge dye molecules. Furthermore, thanks to its hierarchical porosity and mechanical flexibility, straightforward trace detections of melamine in milk and pesticides on the fruit surface were realized using this SERS substrate. This simple and highly efficient SERS substrate provides great opportunity in the field of environmental management and food safety.

ACS Style

Feiya Fuabc; Binbin Yanga; Xinman Hua; Haiyue Tanga; Yupeng Zhanga; Xinyi Xua; Yanyan Zhanga; S Salvia Binte Touhid; Xiangdong Liuabc; Yaofeng Zhuabc; Jinping Zhoud; Juming Yaoabc. Biomimetic synthesis of 3D Au-decorated chitosan nanocomposite for sensitive and reliable SERS detection. Chemical Engineering Journal 2019, 392, 123693 .

AMA Style

Feiya Fuabc, Binbin Yanga, Xinman Hua, Haiyue Tanga, Yupeng Zhanga, Xinyi Xua, Yanyan Zhanga, S Salvia Binte Touhid, Xiangdong Liuabc, Yaofeng Zhuabc, Jinping Zhoud, Juming Yaoabc. Biomimetic synthesis of 3D Au-decorated chitosan nanocomposite for sensitive and reliable SERS detection. Chemical Engineering Journal. 2019; 392 ():123693.

Chicago/Turabian Style

Feiya Fuabc; Binbin Yanga; Xinman Hua; Haiyue Tanga; Yupeng Zhanga; Xinyi Xua; Yanyan Zhanga; S Salvia Binte Touhid; Xiangdong Liuabc; Yaofeng Zhuabc; Jinping Zhoud; Juming Yaoabc. 2019. "Biomimetic synthesis of 3D Au-decorated chitosan nanocomposite for sensitive and reliable SERS detection." Chemical Engineering Journal 392, no. : 123693.

Research article
Published: 23 September 2019 in ACS Applied Bio Materials
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Wound healing is a clinical challenge, and nontoxic, nonadherent wound dressings that promote healing are urgently needed. Herein, hydroxybutyl chitosans (HBCSs) with the degree of substitution (DS) from 0.41 to 1.38 were synthesized in alkali/urea aqueous solutions, from which sponge-like dressings were prepared by freeze-drying. The pore size of the sponges was in the range of 14.8-18.4 m, and the porosity was about 98-99%. The compressive strength of the sponges decreased with increasing DS of HBCS. Cytocompatibility studies with NHDF cells demonstrated that HBCSs were nontoxic and could even promote the growth of fibroblasts. Further tests revealed that HBCS-3 (DS = 0.85) and HBCS-5 (DS = 1.38) exhibited better hemocompatibility and a low blood-clotting index (BCI). Therefore, these two samples were selected as model dressings for in vivo wound-healing assessment in rats. The experiments suggested that HBCS-3 significantly shortened the wound recovery period compared with HBCS-5, chitosan and gauze by facilitating epithelialization, collagen deposition and neovascularization, and activating the immune system. The results highlighted the potential of HBCSs as efficient dressings for promoting wound healing.

ACS Style

Yan Cai; Zibiao Zhong; Chen He; Haoyang Xia; Qianchao Hu; Yanfeng Wang; Qifa Ye; Jinping Zhou. Homogeneously Synthesized Hydroxybutyl Chitosans in Alkali/Urea Aqueous Solutions as Potential Wound Dressings. ACS Applied Bio Materials 2019, 2, 4291 -4302.

AMA Style

Yan Cai, Zibiao Zhong, Chen He, Haoyang Xia, Qianchao Hu, Yanfeng Wang, Qifa Ye, Jinping Zhou. Homogeneously Synthesized Hydroxybutyl Chitosans in Alkali/Urea Aqueous Solutions as Potential Wound Dressings. ACS Applied Bio Materials. 2019; 2 (10):4291-4302.

Chicago/Turabian Style

Yan Cai; Zibiao Zhong; Chen He; Haoyang Xia; Qianchao Hu; Yanfeng Wang; Qifa Ye; Jinping Zhou. 2019. "Homogeneously Synthesized Hydroxybutyl Chitosans in Alkali/Urea Aqueous Solutions as Potential Wound Dressings." ACS Applied Bio Materials 2, no. 10: 4291-4302.

Journal article
Published: 24 August 2019 in Chemical Engineering Journal
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Biomass derived carbon with hollow metallic structures is considered as eco-friendly and sustainable materials, especially as electrode materials, absorbents and catalysts. Herein, hollow CuO nanoparticles (NPs)@carbon (C) microspheres were fabricated by directly using a cellulose-cuprammonium solution as the starting metallic precursor along with the carbonization and oxidation processes. The hollow CuO NPs were formed spontaneously during the oxidation process following a modified Kirkendall effect. The cellulose derived carbon assisted the formation of the hollow structure and prevented the aggregation of CuO NPs during the thermal treatment. As an integrated material, [email protected] microspheres were used as anodes for lithium-ion batteries. The anodes of [email protected] microspheres exhibited a good cycling stability with a discharge capacity of 630 mA h/g at a rate of 0.1 C (1 C = 1 A/g), which is close to the theoretical specific capacity of the anodes of the pure CuO (670 mA h/g), and a good rate performance with high discharge capacities of 361 mA h/g at a rate of 5 C, which is much higher than that of the bare CuO microspheres (57 mA h/g at 5C). The excellent electrochemical performance could be attributed to the unique carbon combined hollow CuO NPs. This work provided a new pathway for preparing biochar based metallic materials with the inexpensive precursor and high applicable performance.

ACS Style

Yue Dong; Xiaoyu Jianga; Jihao Moab; Yuzhou Zhoua; Jinping Zhouabc. Hollow CuO nanoparticles in carbon microspheres prepared from cellulose-cuprammonium solution as anode materials for Li-ion batteries. Chemical Engineering Journal 2019, 381, 122614 .

AMA Style

Yue Dong, Xiaoyu Jianga, Jihao Moab, Yuzhou Zhoua, Jinping Zhouabc. Hollow CuO nanoparticles in carbon microspheres prepared from cellulose-cuprammonium solution as anode materials for Li-ion batteries. Chemical Engineering Journal. 2019; 381 ():122614.

Chicago/Turabian Style

Yue Dong; Xiaoyu Jianga; Jihao Moab; Yuzhou Zhoua; Jinping Zhouabc. 2019. "Hollow CuO nanoparticles in carbon microspheres prepared from cellulose-cuprammonium solution as anode materials for Li-ion batteries." Chemical Engineering Journal 381, no. : 122614.

Journal article
Published: 07 May 2019 in Nanomaterials
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Aggregation-induced emission (AIE) active cellulose nanocrystals (TPE-CNCs) were synthesized by attaching tetraphenylethylene (TPE) to cellulose nanocrystals (CNCs). The structure and morphology of TPE-CNCs were characterized by FT-IR, XRD, ζ-potential measurements, elemental analysis, TEM, atomic force microscopy (AFM), and dynamic laser light scattering (DLS). Fluorescent properties of TPE-CNCs were also further studied. Unlike aggregation-caused quenching (ACQ), TPE-CNCs emitted weak fluorescence in the dilute suspensions, while emitting efficiently in the aggregated states. The AIE mechanism of TPE-CNCs was attributed to the restriction of an intramolecular rotation (RIR) process in the aggregated states. TPE-CNCs displayed good dispersity in water and stable fluorescence, which was reported through the specific detection of nitrophenolic explosives in aqueous solutions by a fluorescence quenching assay. The fluorescence emissions of TPE-CNCs showed quantitative and sensitive responses to picric acid (PA), 2,4-dinitro-phenol (DNP), and 4-nitrophenol (NP), and the detection limits were 220, 250, and 520 nM, respectively. Fluorescence quenching occurred through a static mechanism via the formation of a nonfluorescent complex between TPE-CNCs and nitrophenolic analytes. A fluorescence lifetime measurement revealed that the quenching was a static process. The results demonstrated that TPE-CNCs were excellent sensors for the detection of nitrophenolic explosives in aqueous systems, which has great potential applications in chemosensing and bioimaging.

ACS Style

Xiu Ye; Haoying Wang; Lisha Yu; Jinping Zhou. Aggregation-Induced Emission (AIE)-Labeled Cellulose Nanocrystals for the Detection of Nitrophenolic Explosives in Aqueous Solutions. Nanomaterials 2019, 9, 707 .

AMA Style

Xiu Ye, Haoying Wang, Lisha Yu, Jinping Zhou. Aggregation-Induced Emission (AIE)-Labeled Cellulose Nanocrystals for the Detection of Nitrophenolic Explosives in Aqueous Solutions. Nanomaterials. 2019; 9 (5):707.

Chicago/Turabian Style

Xiu Ye; Haoying Wang; Lisha Yu; Jinping Zhou. 2019. "Aggregation-Induced Emission (AIE)-Labeled Cellulose Nanocrystals for the Detection of Nitrophenolic Explosives in Aqueous Solutions." Nanomaterials 9, no. 5: 707.

Research article
Published: 15 April 2019 in ACS Catalysis
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Improving the selectivity and keeping efficiency of catalysts is essential for industrial processes and remains a great chal-lenge. Herein, we developed a facile route to synthesize Pd nanocubes (NCs) using Eosin Y as the photosensitizer under visi-ble light. Subsequently, Pd NCs were uniformly loaded on N-doped carbon nanofibrous microspheres (NCM) from car-bonated chitin microspheres. This Pd [email protected] exhibited high reactivity and selectivity in alkynes semi-hydrogenation. For example, the hydrogenation of phenylacetylene to styrene and 3-phenyl-2-propyn-1-ol to (Z)-cinnamyl alcohol were 12.9 and 18.3 times faster with Pd [email protected] than Lindlar catalyst. According to the Mott-Schottky effect, loading of Pd NCs on N-doped carbon constructed a rectifying contact and decreased the electron density of Pd NCs. Density functional theory (DFT) calculations suggested that high concentration of hole doped in Pd NCs weakened the interaction of alkenes on Pd (100) facet and prevented further hydrogenation for a long time, this period of durable time is very helpful to chemical manufacturing. Thus, Pd [email protected] maintained both high reactivity and selectivity comparing with surface mod-ified catalysts. This work provides an alternative strategy to design the Mott-Schottky catalysts for selective hydrogenation reactions.

ACS Style

Xingxing Li; Yu Pan; Hong Yi; Jingcheng Hu; Dali Yang; Fengzhi Lv; Wendian Li; Jinping Zhou; Xiaojun Wu; Aiwen Lei; Lina Zhang. Mott–Schottky Effect Leads to Alkyne Semihydrogenation over [email protected] Carbon. ACS Catalysis 2019, 9, 4632 -4641.

AMA Style

Xingxing Li, Yu Pan, Hong Yi, Jingcheng Hu, Dali Yang, Fengzhi Lv, Wendian Li, Jinping Zhou, Xiaojun Wu, Aiwen Lei, Lina Zhang. Mott–Schottky Effect Leads to Alkyne Semihydrogenation over [email protected] Carbon. ACS Catalysis. 2019; 9 (5):4632-4641.

Chicago/Turabian Style

Xingxing Li; Yu Pan; Hong Yi; Jingcheng Hu; Dali Yang; Fengzhi Lv; Wendian Li; Jinping Zhou; Xiaojun Wu; Aiwen Lei; Lina Zhang. 2019. "Mott–Schottky Effect Leads to Alkyne Semihydrogenation over [email protected] Carbon." ACS Catalysis 9, no. 5: 4632-4641.

Journal article
Published: 20 March 2019 in Carbohydrate Polymers
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A series of hydroxybutyl chitosans (HBCSs) with a degree of substitution (DS) ranging from 0.38 to 1.54 were homogeneously synthesized in KOH/LiOH/urea aqueous solutions under ambient conditions. The structure and solution properties of HBCSs were characterized by FT-IR, NMR, SEC-LLS, UV-vis, rheological and DLS measurements. The amino groups at C2 and hydroxyl groups at C3 and C6 participated in the reaction, although substitution mainly occurred at the hydroxyl groups at C6. The HBCSs exhibited good solubility in aqueous solutions, and those with a DS above 1.25 displayed phase separation behavior and precipitated out from solution when heated to a critical temperature. All results confirmed the hypothesis that the homogeneous KOH/LiOH/urea aqueous solution is a stable, mild, and energy-saving reaction medium for preparing HBCSs. Moreover, the HBCSs exhibited excellent biocompatibility, and even promoted the proliferation of normal cells. They also displayed antibacterial activities against S. aureus and E. coli, thus being suitable for biomedical applications.

ACS Style

Yan Cai; Jinfeng Cao; Chang Xu; Jinping Zhou. Thermo-responsive behaviors and bioactivities of hydroxybutyl chitosans prepared in alkali/urea aqueous solutions. Carbohydrate Polymers 2019, 215, 90 -98.

AMA Style

Yan Cai, Jinfeng Cao, Chang Xu, Jinping Zhou. Thermo-responsive behaviors and bioactivities of hydroxybutyl chitosans prepared in alkali/urea aqueous solutions. Carbohydrate Polymers. 2019; 215 ():90-98.

Chicago/Turabian Style

Yan Cai; Jinfeng Cao; Chang Xu; Jinping Zhou. 2019. "Thermo-responsive behaviors and bioactivities of hydroxybutyl chitosans prepared in alkali/urea aqueous solutions." Carbohydrate Polymers 215, no. : 90-98.

Original research
Published: 06 March 2019 in Cellulose
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Development of a simple, green, and universal method for the fabrication of hydrophobic cellulosic materials is of significance for enlarging their applications. Herein, one-step gas–solid reaction for the preparation of hydrophobic cellulosic materials having any shape and size is proposed. The substance can be made hydrophobic, as it is fully exposed to the reactive organosilane vapor. Filter paper (FP), a typical cellulosic material, was selected to study the hydrophobic modification with perfluorooctyltriethoxysilane (PFTS). The results indicated that PFTS was successfully introduced onto the surface of the cellulose fiber. Compared with the pristine FP, the physicochemical properties of the PFTS-modified FP (SFP) were significantly improved. The silane content of SFP was approximately 45–55 mg g−1, and the water contact angle was as large as 146° ± 3° under the proper conditions. SFP retained good chemical stability in harsh conditions of acidic, alkaline and saline solutions that is appropriate in practical environment. It was successfully applied in separating a series of oil/water mixtures with a separation efficiency of over 99%. The flux and separation efficiency remained high even after 30 reuse cycles (99% for chloroform/water mixtures). Moreover, the proposed vapor-based technique has the potential to allow continuous preparation of hydrophobic cellulosic materials with industrial applications.

ACS Style

Lisha Yu; Zeming Zhang; Hongding Tang; Jinping Zhou. Fabrication of hydrophobic cellulosic materials via gas–solid silylation reaction for oil/water separation. Cellulose 2019, 26, 4021 -4037.

AMA Style

Lisha Yu, Zeming Zhang, Hongding Tang, Jinping Zhou. Fabrication of hydrophobic cellulosic materials via gas–solid silylation reaction for oil/water separation. Cellulose. 2019; 26 (6):4021-4037.

Chicago/Turabian Style

Lisha Yu; Zeming Zhang; Hongding Tang; Jinping Zhou. 2019. "Fabrication of hydrophobic cellulosic materials via gas–solid silylation reaction for oil/water separation." Cellulose 26, no. 6: 4021-4037.