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Post-processing of chitosan based nanofibers prepared by electrospinning

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Post-processing of chitosan based nanofibers prepared by ele...

Electrospun Materials for Batteries Moving Beyond Lithium‑Ion Technologies

第八届中国功能材料及其应用学术会议

作者： SUN Kang GE Yuan-xin LI Zhong-hui ZHANG Xiao-lin Institute of Applied Chemistry Chengdu normal university Environmental monitoring station of Minhang district

ISBN: (纸本)9783037859698

Recently,electrospinning of nanofibers based on chitosan has been widely studied and numerous chitosan based nanofibers have been prepared,for the enormous possibilities of applications in various areas such as filtration,enzyme immobilization,tissue engineering,wound dressing,drug delivery,and *** most of the chitosan based nanofibers are soluble in aqueous solutions and the other properties such as mechanical properties are not suitable for the further *** is necessary to improve the properties of chitosan based *** post-processing has been done to the chitosan based nanofibers and many post-processing products have *** article discusses the post-processing of the chitosan based nanofibers involving methods,mechanisms,changes of nanofiber properties,and applications of the post-processing products in *** post-processing is divided into alkali treatment,crosslinking,and functionalizing.

关键词： chitosan nanofiber electrospinning postprocessing application

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Electrochemical Energy Reviews 2022年第2期5卷 211-241页

作者： Jie Wang Zhenzhu Wang Jiangfeng Ni Liang Li School of Physical Science and Technology Center for Energy Conversion Materials and Physics(CECMP)Jiangsu Key Laboratory of Thin FilmsSoochow UniversitySuzhou 215006JiangsuChina Light Industry Institute of Electrochemical Power Sources Suzhou 215699JiangsuChina

Innovation and optimization have shifted battery technologies beyond the use of lithium ions and fostered the demand for enhanced materials,which are vital factors determining the energy,power,durability,and safety of *** battery materials vary in their sizes,shapes,and morphology,and these have yet to meet the performance standards necessary to prevent deterioration in regard to the efficiency and reliability of beyond-lithium *** a versatile and feasible technique for producing ultrathin fibers,electrospinning has been extensively developed to fabricate and engineer nanofibers of functional materials for battery *** this review,the basic concepts and characteristics of beyond-lithium batteries are expounded,and the fundamentals of electrospinning are *** aim is to provide a guide to researchers going into this *** are placed on how electrospinning can address some of the key technical challenges facing beyond-lithium *** hope the knowledge presented in this work will stimulate the design of electrospun materials for future battery applications.

关键词： Electrospinning Electrospun material Beyond-lithium battery nanofiber

Self-assembly of single metal sites embedded covalent organic frameworks into multi-dimensional nanostructures for efficient CO_(2) electroreduction

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Chinese Chemical Letters 2022年第3期33卷 1439-1444页

作者： Yi-Lu Yang Yi-Rong Wang Guang-Kuo Gao Ming Liu Chang Miao Le-Yan Li Wei Cheng Zi-Yue Zhao Yifa Chen Zhifeng Xin Shun-Li Li Dong-Sheng Li Ya-Qian Lan Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials Jiangsu Key Laboratory of New Power BatteriesSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China School of Chemistry South China Normal UniversityGuangzhou 510006China Institute of Molecular Engineering and Applied Chemistry Anhui University of TechnologyMa'anshan 243002China College of Materials and Chemical Engineering Hubei Provincial Collaborative Innovation Center for New Energy MicrogridKey Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges UniversityYichang 443002China

Morphology-controlled electrocatalysts with the ability of CO_(2) adsorption/activation, mass transfer, high stability and porosity are much desired in electrochemical CO_(2) reduction reaction (CO_(2)RR). Here, three kinds of multi-dimensional nanostructures (i.e., hollow sphere, nanosheets and nanofibers) have been successfully produced through the modulation of porphyrin-based covalent organic frameworks (COFs) with various modulators. The obtained nanostructures with high-stability, large surface-area, and single metal sites enable efficient CO_(2)RR into CH_(4). Notably, they all exhibit higher FE (hollow sphere, 68.2%;nanosheet, 64.2% and nanofiber, 71.0%, -0.9 V) than COF-366-Cu (43.0%, -0.9 V) after morphology control. Noteworthy, the FE of COF-366-Cu (HS) keeps higher than 52.4% over a wide potential range from -0.9 V to -1.1 V and the achieved FECH_(4) + C_(2)H_(4) (82.8%, -0.9 V) is superior to most of reported COFs and copper-based electrocatalysts. This work paves a new way in the exploration of COF-based multi-dimensional nanostructures applicable in efficient CO_(2)RR to CH_(4).

关键词： CO_(2)electroreduction Covalent organic frameworks Hollow sphere nanofiber Nanosheet

Double‑Layer Nanofibrous Sponge Tube via Electrospun Fiber and Yarn for Promoting Urethral Regeneration

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Advanced Fiber Materials 2023年第2期5卷 662-680页

作者： Kaile Zhang Muhammad Aqeel Bhutto Liyang Wang Kai Wang Jie Liu Wenyao Li Wenguo Cui Qiang Fu The Department of Urology Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai Jiao Tong UniversityShanghai 200233People’s Republic of China Institute of Biotechnology and Genetic Engineering University of SindhJamshoro 76080Pakistan School of Materials Science and Engineering Shanghai University of Engineering ScienceShanghai 201620People’s Republic of China Clinical Research Center Shanghai Chest HospitalShanghai Jiao Tong UniversityShanghai 200233People’s Republic of China Regenerative Medicine Research Center The First People’s Hospital of Yunnan ProvinceThe Affiliated Hospital of Kunming University of Science and TechnologyKunming 650000People’s Republic of China Shanghai Institute of Traumatology and Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint DiseasesRuijin HospitalShanghai Jiao Tong University School of MedicineShanghai 200025People’s Republic of China

Insufficient bionic performance is a structural obstacle and makes urethral repair *** overcome this challenge,we mimicked the urethral matrix and applied two electrospinning techniques to build a double-layer sponge tube of nanofib-ers and ***,silk fibroin(SF)and vitamin B5(VitB5)could be introduced to increase the elasticity of the outer layer and reduce the hydrophobicity to further improve mesenchymal cell *** experiments validated the bionic structure,biocompatibility,and exosome delivery capacity in this *** achieved scarless urethral repair by delivering the bioactive growth factors from adipose-derived stem cell exosomes by physical *** regeneration of the urethra can be accomplished with continuous epithelium in ***,bioinformatics studies revealed that the expression of cell proliferation and fibrotic genes(e.g.,Wnt7a,cfa-miR-574)was responsible for the bio-logical regeneration of the adipose-derived stem cells exosomes(ADSC-exos)by delivering poly l-lactide-co-caprolactone/SF/VitB5 bilayer sponge(PSVBS)via reduced fibrosis gene expression,as well as improved epithelial formation and blood vessel ***,the PSVBS design appeared to be an instructive approach for urethral and other tubular organ regeneration.

关键词： Electrospinning nanofiber Nanoyarn Urethral stricture Urethral reconstruction

Edge-Plane Exposed N-Doped Carbon nanofibers Toward Fast K-Ion Adsorption/Diffusion Kinetics for K-Ion Capacitors

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CCS Chemistry 2020年第4期2卷 495-506页

作者： Zheng Yi Song Jiang Yong Qian Jie Tian Ning Lin Yitai Qian Department of Applied Chemistry Hefei National Laboratory for Physical Science at MicroscaleUniversity of Science and Technology of ChinaHefeiAnhui 230026 Experimental Center of Engineering and Material Science University of Science and Technology of ChinaHefeiAnhui 230026.

Sluggish kinetics severely limit the development of potassium-ion hybrid capacitors(PIHCs).Exposing active sites is recognized as an ideal strategy to resolve this issue,but the corresponding material design is ***,carbon nanofibers with abundant,exposed edge-plane active sites due to(002)orientation adjustment were developed by a molten salt-assisted ***,due to the radial(002)orientation with more active edge-plane sites to adsorb K and shorten the K diffusion distance,the obtained carbon nanofibers harvest improved K adsorption/diffusion kinetics.

关键词： orientation design potassium-ion capacitor carbon nanofiber N-doping energy/power density

Review:Scalable Fabrication of Polymeric nanofibers from Nano⁃ Spinning Techniques to Emerging Applications

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Journal of Harbin Institute of Technology(New Series) 2020年第3期27卷 58-73页

作者： Jian Lu Zexu Hu Qianqian Wang Matteo Ciprian Xiang Fei Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Research in the nanofibers field is attracting an ever-increasing attention from the industrial and academic sector. This attention is justified by the high specific surface area and high porosity, diversity of physical/chemical modification, and simplicity of hybridization. This review summarizes the state-of-the-art progress on the fabrication of polymeric nanofibers(PNFs) with particular emphasis on their scalable productions for emerging applications. First, the engineering processes and equipment for PNFs production are briefly introduced, and the effects of the polymer precursors, operational parameters, and environmental conditions on the nanofiber’s formation are illustrated. The past achievements and current challenges of PNF preparation in industrial production are also discussed. Hybridization methods to prepare multifunctional composite nanofibers are also reviewed, including organic incorporation modification, loading functional inorganic nanomaterials, and biological active components on/into nanofibers. Given these hybridizations and functions, a variety of applications are then discussed, focusing mainly on environmental and biomedical applications. Finally, conclusions are drawn and prospects are given according to the reviewed research.

关键词： nanofiber polymer nano⁃spinning technique hybridization application

Application of Cellulose and Cellulose nanofibers in Oil Exploration

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Paper And Biomaterials 2019年第3期4卷 69-77页

作者： Xiongli Liu Chunping Wang An Wang Jialei Qu Yangbing Wen Bing Wei Tianjin Key Laboratory of Pulp and Paper Tianjin University of Science and TechnologyTianjin 300457China Tianjin Woodelf Biotechnology Co. Ltd.Tianjin300457China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduSichuan Province610500China

In this article, the application of cellulose and cellulose nanofibers in oil exploration was discussed, and the research status of using cellulose and cellulose nanofibers as oil displacement agents, oil-well cementi... 详细信息

关键词： cellulose cellulose nanofiber oil exploration

Self-assembled IKVAV Peptide nanofibers Promote Adherence of PC12 Cells

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2006年第5期26卷 594-596页

作者：吴永超郑启新杜靖远宋玉林吴斌郭晓东 Department of Orthopedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China

Lack of biocompatibility and bioactivity is a big problem for the synthetic materials that have been generated for neural tissue engineering. To get around the problem and generate better scaffold for neural tissue repair, we intended to generate nano-fibers by self-assembly of polypeptide IKVAV. Bioactive IKVAV Peptide-Amphiphile （IKVAV-PA） was first synthesized and purified, the property of which was analyzed and determined by high-performance liquid chromatography （HPLC） and mass spectrometry （MS）. Then, by addition of hydrogen chloride （HC1）, self-assembly of IKVAV-PA was induced in vitro and nano-fibers formed as shown by transmission electron microscopy （TEM）. The effect of IKVAV nanofibers on adherence of PCI2 cells was assayed in cell culture and the results showed that the rates of adherence of PC12 increased significantly when the density of IKVAV was within a certain range （0.58 μg/cm^2 to 15.6 μg/cm^2）. However, its effect on the rates of adherence did not significantly alter with time, whether after 1 hour or 3 hours of culture. In general, we showed that IKVAV-PA can successfully self-assemble to form nanofiber, and promote rapid and stable adherence of PC12 cells, and the effect of the self-assembled IKVAV to promote PCI2 cells adherence is dosage-dependent within a certain range of densities.

关键词： neural tissue engineering peptide self-assembly nanofiber cell adherence

基于2,4,6-三甲基-1,3,5-三嗪的超长纳米纤维状乙烯基桥连共价有机框架

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Science Bulletin 2020年第19期65卷 1659-1666,M0004页

作者：张凡魏士策魏巍巍邹江谷国迎吴东清毕帅张帆 School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Robotics Institute School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240China

二维乙烯基桥连共价有机框架材料(COF)因具有良好的π电子离域属性和超高的化学稳定性而成为一类极具研究价值的低维晶态聚合物材料,但受限于种类较少,其各种物性、可加工性和潜在应用仍处于探索阶段.本文以2,4,6-三甲基-1,3,5-三嗪为... 详细信息

二维乙烯基桥连共价有机框架材料(COF)因具有良好的π电子离域属性和超高的化学稳定性而成为一类极具研究价值的低维晶态聚合物材料,但受限于种类较少,其各种物性、可加工性和潜在应用仍处于探索阶段.本文以2,4,6-三甲基-1,3,5-三嗪为关键单体,与基于三嗪核的三倍对称性芳香多醛类单体在氢氧化钾催化下通过Knoevenagel缩聚合成了两种新型乙烯基桥连二维COF材料.两种COF材料均显示出较高结晶性并呈现蜂窝状六边形孔道结构,同时它们可形成确定的纳米纤维形貌,其直径约为80 nm,长度可达几微米.这类COFs纳米纤维能够与碳纳米管组装复合成高质量薄膜,通过传统的热压工艺处理,在不改变其微纳结构的前提下进一步提高了薄膜的密度和机械强度.随后,将该复合薄膜利用激光刻蚀法加工成微型叉指电极,并与离子液体固态电解质进一步组装成平面微型超级电容器.该器件在2.5 V电压窗口下,展现出44.3 mF cm^-2面积电容、38.5 mWh cm^-3能量密度以及良好的循环稳定性.

关键词： Covalent organic framework Olefin linkage nanofiber Micro-supercapacitor Energy storage