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Chinese Journal of polymer Science 2017年第6期35卷 700-712页

作者：孙胜童武培怡 state Key Laboratory for Modification of chemical fibers and polymer materials College of Chemistry Chemical Engineering and Biotechnology Center for Advanced Low-Dimension Materials Donghua University state Key Laboratory of Molecular Engineering of polymers Collaborative Innovation Center of Polymers and Polymer Composite Materials Department of Macromolecular Science and Laboratory for Advanced Materials Fudan University

Generalized two-dimensional correlation spectroscopy （2DCOS） and its derivate technique, perturbation correlation moving window （PCMW）, have found great potential in studying a series of physico-chemical phenomena in stimuli-responsive polymeric systems. By spreading peaks along a second dimension, 2DCOS can significantly enhance spectral resolution and discern the sequence of group dynamics applicable to various external perturbation-induced spectroscopic changes, especially in infrared （IR）, near-infrared （NIR） and Raman spectroscopy. On the basis of 2DCOS synchronous power spectra changing, PCMW proves to be a powerful tool to monitor complicated spectral variations and to find transition points and ranges. This article reviews the recent work of our research group in the application of 2DCOS and PCMW in thermoresponsive polymers, mainly focused on liquid crystalline polymers and lower critical solution temperature （LCST）-type polymers. Details of group motions and chain conformational changes upon temperature perturbation can thus be elucidated at the molecular level, which contribute to the understanding of their phase transition nature.

关键词： Thermoresponsive polymers Phase transition Two-dimensional correlation spectroscopy Perturbation correlation moving window

Enhancement of Adhesive Strength of Ultrahigh Molecular Weight Polyethylene fibers Prepared by Polar polymer Implantation

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Journal of Donghua University(English Edition) 2007年第3期24卷 317-322页

作者：于俊荣杨新革胡祖明刘兆峰 state Key Laboratory for Modification of chemical fibers and polymer materials Donghua University College of Chemistry and chemical Engineering Linyi Normal University

A new technique was proposed to enhance the adhesive strength of ultrahigh molecular weight polyethylene （UHMWPE） fibers. Polar polymer was implanted into UHMWE gel fibers during extracting process and can then be trapped on the surface of the fibers after subsequent ultra-drawing. The physical and chemical changes in the fiber structure were examined with scanning electron microscopy （SEM） and Fourier transform infrared （FTIR） spectroscopy. The mechanical and interfacial adhesion properties of UHMWPE fibers were investigated with tensile testing. The results showed that there were polar groups on the smface of pretreated UHMWPE fiber. The interracial shear strength of UHMWPE fibers with epoxy resin was greatly improved without sacrificing the excellent mechanical p^perties of fibers. After pretreated with ethylene/vinyl acetate copolymer （EVA）, the shear strength of the interface between fiber and epoxy resin increased from 1.06 to 2.49 MPa, while the integrated mechanical properties d the pretreated UHMWPE fibers were still optimal.

关键词： ultrahigh molecular weight polyethylenefibers polar polymer extracting inter facial strengthmechanical properties

On-demand assembly of polymeric nanoparticles for longer-blood-circulation and disassembly in tumor for boosting sonodynamic therapy

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Bioactive materials 2022年第12期7卷 242-253页

作者： Mei Wen Nuo Yu Shiwen Wu Mengmeng Huang Pu Qiu Qian Ren Meifang Zhu Zhigang Chen state Key Laboratory for Modification of chemical fibers and polymer materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China

Sonodynamic therapy (SDT) is one of the promising strategies for tumor therapy, but its application is usually hindered by fast clearance in blood-circulation, abnormal tumor microenvironment, and inefficient generation of reactive oxygen species. To solve these problems, we proposed an on-demand assembly-disassembly strategy, where the assembly is favorable for longer-blood-circulation and then the disassembly in tumor is favorable for boosting SDT. Hematoporphyrin monomethyl ether (HMME) as the model of organic sonosensitizers were conjugated with hyaluronic acid (HA). Then HA-HMME was mixed with catalase (CAT) and assembled into polymeric nanoparticles (CAT@HA-HMME NPs) with size of ~80 nm. CAT@HA-HMME NPs exhibit good biocompatibility and a longer blood half-time (t1/2 = 4.17 h) which is obviously longer than that (~0.82 h) of HMME molecules. After HA receptor-mediated endocytosis of cancer cells, CAT@HA-HMME NPs can be cleaved by endogenous hyaluronidase, resulting in the on-demand disassembly in tumor to release HA-HMME molecules and CAT. The CAT catalyzes the endogenous H_(2)O_(2) into O_(2) to relieve the hypoxic microenvironment, and the released HA-HMME exhibits a higher ROS generation ability, greatly boosting SDT for the inhibition of tumor growth. Therefore, the on-demand assembly-disassembly strategy may provide some insight in the design and development of nanoagents for tumor therapy.

关键词： polymeric nanoparticles On-demand assembly Longer-blood-circulation On-demand disassembly Sonodynamic therapy

Emerging high-entropy strategy: A booster to the development of cathode materials for power batteries

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Journal of Advanced Ceramics 2024年第8期13卷 1093-1118页

作者： Liping Huang Jinging Zhu J-Xuan Liu Houzheng Wu Guo-Jun Zhang state Key Laboratory for Modification of chemical fibers and polymer materials Institute of Functional MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China SIAMC Advanced materials Cooperation Huzhou 313100China

The coordinated development of new energy vehicles and the energy storage industry has become essential for reducing carbon *** cathode material is the key material that determines the energy density and cost of a power battery,but currently developed and applied cathode materials cannot meet the requirements for high specific capacity,low cost,safety,and good ***-entropy materials(HEMs)are a new type of single-phase material composed of multiple principal elements in equimolar or near-equimolar *** interaction between multiple elements can play an important role in improving the comprehensive properties of the material,which is expected to solve the limitations of battery materials in practical ***,this review provides a comprehensive overview of the current development status and modification strategies of power batteries(lithium-ion batteries(LiBs)and sodium-ion batteries(SIBs)),proposes a high-entropy design strategy,and analyses the structure-activity relationship between the high-entropy effects and battery ***,future research topics related to high-entropy cathode materials,including computational guide design,specific synthesis methods,high-entropy electrochemistry,and high-throughput databases,are *** review aims to provide practical guidance for the development of high-entropy cathode materials for next-generation power batteries.

关键词： cathode materials lithium-ion battery(LIB) sodium-ion battery(SIB) high-entropy strategy

Controllable Strong and Ultralight Aramid Nanofiber‑Based Aerogel fibers for Thermal Insulation Applications

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Advanced Fiber materials 2022年第5期4卷 1267-1277页

作者： Mengmeng Li Xian Chen Xiuting Li Jie Dong Xin Zhao Qinghua Zhang state Key Laboratory for Modification of chemical fibers and polymer materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China

High-performance polymer-based aerogel fibers with ultrahigh porosity,mechanical robustness and outstanding thermal stability are demanded for applying in effective thermal insulation devices,especially in harsh ***,the poor mechanical properties and thermal stability of the commonly reported polymer-based aerogel fibers restricted their applications in many *** a special nano-build-block,aramid nanofiber-based aerogel fiber is expected to conquer this problem in virtue of the outstanding performance,intrinsically related to aramid ***,a series of aramid nanofiber-based aerogel fibers were fabricated via a facial wet-spinning method combined with freeze-drying *** effects of coagulation bath temperature and the solid contents of the spinning precursors on their morphologies and mechanical properties were systematically *** obtained aerogel fibers possessed high porosity(>92%),good mechanical prop-erties(tensile strength~8.1 MPa)and high specific surface area(~239 m^(2)/g).Meanwhile,the woven textiles exhibited a low thermal conductivity(~34 mW/(m·K))and outstanding thermal insulation properties under a wide range of *** addition,surface modification by Teflon resin could make the ANAFs hydrophobic,thus exhibiting their applicational pros-pects in a humid ***,the aramid nanofiber-based aerogel fibers and their textile throw light in a favorable direction for developing high-performance thermal insulation fibers and textiles.

关键词： ANFs High mechanical properties Aerogel fiber Thermal insulation

Molecular Motions in polymer Matrix for Microenvironment Sensing

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chemical Research in Chinese Universities 2021年第1期37卷 90-99页

作者： GAO Mengyue CHENG Yanhua ZHANG Junyan XU Chengjian YU Xiaoxiao ZHU Meifang state Key Laboratory for Modification of chemical fibers and polymer materials College of Materials Science and EngineeringDonghua UniversityShanghai201620P.R.China

polymer science entails the structural study at multi-levels from nano-to micro-and mesoscale,which is highly important to transfer or even amplify the molecular information to macroscopic *** polymer structural transitions from lower-order to higher-order superstructures are normally involved to achieve selective,efficient and sophisticated ***,in-situ visualization of these processes is highly important,not only for fundamental understanding the structural evolution,but also for the optimization of the process flow during the materials *** imaging based on aggregation-induced emission(AIE)provides an ideal tool that offers a simple,accurate,and easy-readable method to fulfill the above *** to the twisted propeller-like structure of AIE luminogens(AIEgens),they show high fluorescence sensitivity to the surrounding microenvironment(e.g.,viscosity,rigidity,and polarity)through intramolecular *** this short review,we summarize the recent applications of AIEgens to serve as“built-in”sensors to analyze the process of polymerization,microphase separation,glass/vitrification transition,polymer solvation,crystallization,*** perspective on the future application of AIE technology in polymer engineering,especially fiber materials,is also discussed.

关键词： Aggregation-induced emission(AIE) Intramolecular motion polymer structure polymer microenvironment Visualization

EXTENSIONAL FLOW OF BULK polymerS STUDIED BY DYNAMIC MONTE CARLO SIMULATIONS

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Chinese Journal of polymer Science 2013年第11期31卷 1463-1469页

作者： Yu Ma Xiao-hong Zhang 胡文兵 Department of polymer Science and Engineering State Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing University state Key Laboratory for Modification of chemical fibers and polymer materials Donghua University Anhui Tong Feng Electronics Corporation

Dynamic Monte Carlo simulations of bulk lattice polymers driven through planar geometries with sequentially converging, parallel and diverging spaces between two neutrally repulsive solid plates are reported. The spatial profiles of polymer velocity and deformation along the course of such a laminar extensional flow have been carefully analyzed. The results appear consistent with experimental observations in literature. In the entrance and exit regions, a linear dependence of chain extension upon the excess velocity has been observed. Moreover, an annexed shear flow and a molecular-dispersion effect are found. The results demonstrate a useful strategy of this approach to study polymer flows and bring new insights into the non-Newtonian-fluid behaviors of bulk polymers in capillary rheometers and micro-fluidic devices.

关键词： polymer deformation Extensional flow Monte Carlo simulations.

The Structure and Properties of Polyethylene Oxide Reinforced Poly(Metaphenylene Isophthalamide)fibers

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Advanced Fiber materials 2022年第3期4卷 436-447页

作者： Qingquan Song Wenwen Wu Yi Wang Junrong Yu Zuming Hu Yan Wang state Key Laboratory for Modifcation of chemical fibers and polymer materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China

In this paper,the efect of poly(ethylene oxide)(PEO)as an additive on the structure and properties of poly(m-phenylene dimethylene terephthalamide)(PMIA)fbers obtained by wet spinning was *** tensile strength of the composite fbers was substantially enhanced compared to the pure PMIA *** was due to the fact that the addition of PEO weakens the hydrogen bonding between PMIA molecular chains resulting in an improved orientation of the composite *** was found that the optimum PEO addition was 2%and the tensile strength of the composite fber was 4.74 cN/dtex,which was 76%higher compared to the pure PMIA ***,the heat resistance and fame retardancy of the composite fbers were basically unchanged compared to the pure PMIA *** modifcation method is simple,with low raw material cost and good stability,and has not only good academic value but also excellent industrial value.

关键词： Poly(metaphenylene isophthalamide) Polyethylene oxide Mechanical properties Hydrogen bonding

Dissolving of Ultra‑high Molecular Weight Polyethylene Assisted Through Supercritical Carbon Dioxide to Enhance the Mechanical Properties of fibers

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Advanced Fiber materials 2022年第2期4卷 280-292页

作者： Yi Wang Jiabin Fu Junrong Yu Qingquan Song Jing Zhu Yan Wang Zuming Hu state Key Laboratory for Modifcation of chemical fibers and polymer materials College of Material Science and EngineeringDonghua UniversityShanghai 201620China

The molecular weight of ultra-high molecular weight polyethylene(UHMWPE)fbers is severely decreased compared with raw materials due to high temperature and strong shearing in the dissolving *** this study,we reported a novel method to assist the dissolving of UHMWPE in parafn oil without severe degradation in order to improve the tensile strength of resultant *** fbers with relatively high molecular weight and more excellent disentanglement efect were prepared by gel-spinning with UHMWPE suspension treated with supercritical carbon dioxide(SC-CO_(2)).The dynamic thermomechanical,mechanical and crystalline properties of UHMWPE extracted fbers and drawn fbers were researched *** extracted fbers obtained after SC-CO_(2) treatment display a higher molecular *** importantly,it is clear that the disentanglement of UHMWPE gel fbers gained by processing SC-CO_(2) has been signifcantly promoted compared with that without SC-CO_(2) treatment from dynamic thermomechanical and rheological results,which could also be demonstrated from the cross-sectional morphology of UHMWPE extracted ***,the tensile strength of UHMWPE fbers prepared through SC-CO_(2) treating is able to attain 30.11 cN/dtex,increased by 10.3%in comparison to UHMWPE fbers gained without assistance of SC-CO_(2).Beyond that,the thermal behavior and crystallization performance of UHMWPE extracted fbers and drawn fbers acquired by way of SC-CO_(2) treatment have also been enhanced.

关键词： Ultra-high molecular weight polyethylene fbers Supercritical carbon dioxide Tensile strength Chain entanglement Molecular degradation Gel-spinning

Intriguing anti-superbug Cu2O@ZrP hybrid nanosheet with enhanced antibacterial performance and weak cytotoxicity

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Nano Research 2019年第6期12卷 1453-1460页

作者： Jialiang Zhou Hengxue Xiang Fatemeh Zabihi Senlong Yu Bin Sun Meifang Zhu state Key Laboratory for Modification of chemical fibers and polymer materials International Joint Laboratory for Advanced Fiber and Low-dimension MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China

In view of it's strong antibacterial function and minor toxicity,cuprous oxide (Cu2O) is frequently used in various broad-spectrum antibacterial *** the undesirable effects of superbugs still remain *** this research,a chemical deposition approach is used to prepare a Cu2O@ZrP composite with nanosheet configuration demonstrating excellent dispersibility and antibacterial *** systematic analysis,it was inffered that the content of copper in the nanosheet was about 57-188 mg/g while the average thickness of the nanosheets Cu2O formed on ZrP is approximately 0.8 *** results of the minimal inhibitory concentration (MIC) revealed that an extremely low loading of Cu2O in Cu2O@ZrP nanosheet can lead to exceptional antibacterial *** on two various superbugs;***-resistant staphylococcus aureus (MRSA) and vancomycin-resistant enterococcus (VRE),the composite nanosheet reagent performed over 99% microbial *** intesetingly,the cell growth rate of the Cu2O@ZrP nanosheet was determined to be 20% lower than that of the neat Cu2O,manifesting a weaker *** unique hybrid nanosheet with intriguing anti-superbug performance promises highly efficient protection for the fabrics,battledress,and medical textiles.

关键词： superbug Cu2O ZrP nanosheet antibacterial activitycy totoxicity