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SSRN 2023年

作者： Shen, Kai Li, Peng Lin, Jiahao Wang, Ziqiu Cai, Gangfeng Ming, Xin Liu, Yingjun Gao, Chao Xu, Zhen MOE Key Laboratory of Macromolecular Synthesis and Functionalization International Research Center for X Polymers Department of Polymer Science and Engineering Zhejiang University 38 Zheda Road Hangzhou310027 China Shanxi-zheda Institute of Advanced Materials and Chemical Engineering Taiyuan030032 China

Disordered wrinkles inevitably appear in the fluid assembly process of graphene and heavily depress performances of assembled graphene papers. Achieving high plasticity enables the post modulation to rearrange wrinkles by stretching. Here, we obtain an over 100% improved plasticity by intercalating oligomer into graphene oxide (GO) laminates and fabricate strong, stiff and conductive graphene papers (GPs) via post stretching. The intercalated oligomer activates the mobilization of GO sheets and endows high plasticity of solid GO papers. The improved plasticity allows high stretching ratio and the post-stretched GP features regular orientation (0.95) of graphene sheets and aligned fine wrinkles. The crystalline GPs have a high tensile strength up to 1.3 GPa and Young's modulus of 92.9 GPa, combining with highly electrical conductivity (1.05 × 105 S m-1) and facile production process. The greatly improved plasticity by oligomer extends the processing capability of graphene materials and the strong and conductive GP can be assembled in high performance nanocomposites with excellent electromagnetic interference (EMI) shielding effectiveness. © 2023, The Authors. All rights reserved.

关键词： Electromagnetic pulse

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Multifunctional semitransparent organic solar cells with excellent infrared photon rejection

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Chinese Chemical Letters 2020年第6期31卷 1608-1611页

作者： Xue Li Ruoxi Xia Kangrong Yan Hin-Lap Yip Hongzheng Chen Chang-Zhi Li State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Luminescent Materials and Devices School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640China

Semitransparent organic solar cells(ST-OSCs)have the potentials to open promising applications that differ from those of conventional inorganic ones,such as see-through power windows with both energy generation and heat insulation ***,to achieve so,there remain significant challenges,especially for balancing critical parameters,such as power conversion efficiency(PCE),average visible transparency(AVT)and low energy infrared photon radiation rejection(IRR)to realize the full potentials of ***,we demonstrate the new design of ST-OSCs through the rational integration of organic materials,transparent electrode and infrared photon reflector in one *** the assistance of optical simulation,new ST-OSCs with precise layout exhibit state-of-art performance,with near 30%AVT and PCE of 7.3%,as well as an excellent IRR of over 93%(780-2500 nm),representing one of best multifunctional ST-OSCs with promising perspective for window application.

关键词： Semitransparent organic solar cell Distributed Bragg reflector Ultrathin silver film Infrared radiation rejection Average visible transparency

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Prosthetic heart valves for transcatheter aortic valve replacement

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BMEMat(BioMedical Engineering Materials) 2023年第2期1卷 78-99页

作者： Xinman Hu Shifen Li Pai Peng Beiduo Wang Wenxing Liu Xiaofei Dong Xiayan Yang Miroslav Karabaliev Qifeng Yu Changyou Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization International Research Center for Functional PolymersDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhouChina Shanghai NewMed Medical Technology Co. LtdShanghaiChina Department of Medical Physics Biophysics and RadiologyFaculty of MedicineTrakia UniversityStara ZagoraBulgaria

Transcatheter aortic valve replacement (TAVR) has the advantages of less trauma and faster postoperative recovery, which has brought the possibility to the elderly patient with valvular heart disease and is gradually replacing surgical aortic valve replacement (SAVR). The interventional valve used in TAVR needs to be compressed and transported through the catheter to the lesion site, and can still recover its original shape, structure and performance. This process requires that the material should be flexible, and the rigid mechanical valves in SAVR are not suitable. Recently, decellularized biological valves have been widely used in clinical practice, but their poor durability causes a limitation for long-term implantation. Therefore, the anti-calcification modification of biological valves and the design of new polymeric valves with good biostability have gained considerable attention. This review summarizes the calcification mechanism of biological valves and the research progress in anti-calcification modification strategies. Besides, the development of new polymeric valves is included, with special attention to representative cases, such as polysiloxane, polytetrafluor- ethylene, poly(styrene-block-isobutylene-block-styrene), and polyurethane- based materials. Finally, the challenges and future perspectives of artificial heart valve materials are discussed.

关键词： biological valve calcification durability polymeric valve transcatheter aortic valve replacement(TAVR)

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Highly efficient and thermal stable guanidinium-based two-dimensional perovskite solar cells via partial substitution with hydrophobic ammonium

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Science China Chemistry 2019年第7期62卷 859-865页

作者： Yingzhu Zhang Jiehuan Chen Xiaomei Lian Weitao Yang Jun Li Shuoxun Tian Gang Wu Hongzheng Chen State Key Laboratory of Silicon Materials Key Laboratory of Macromolecular Synthesis and Functionalization (Ministry of Education)Department of Polymer Science and Engineering Zhejiang University

Layered two-dimensional(2D)perovskite solar cells(PVSCs)with a chemical formula of C(NH2)3(CH3NH3)3Pb3I10(n=3)have been fabricated through additive engineering,wherein stoichiometrically equivalent guanidinium(GA+)and methylammonium(MA+)serve as spacer *** crystallinity of the perovskite films is dramatically enhanced with proper amount of methylammonium thiocyanate(MASCN)added into the precursor *** addition,we substitute a small amount of MA+with hydrophobic phenylethylammonium(PEA+),which can passivate trap states of the perovskite *** a result,the open circuit voltage increases to 1.1 V and the best power conversion efficiency(PCE)of 10.12%is ***,superior thermal stability and balanced moisture stability of the PEA-substituted GA-based PVSCs are demonstrated,compared to the popular 3D MAPbI3and 2D PEA-based *** retain approximately 80%of the original PCE after 30 d at 20%relative humidity(RH),and 50%of the original PCE after 3200 min at 85°C without any *** work suggests a new route to achieve both heat and humidity stable PVSCs by simply mixing different spacer cations.

关键词： guanidinium-based 2D perovskite solar cells additive engineering PEA substitution stability

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A Polymer System with Ultra-High Molecular Potential Energy

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Advanced Functional Materials 2025年

作者： Wang, Yan-Jie Ni, Jia-Yu Gao, Fan Cui, Chunyan Xu, Ziyang Zheng, Si Yu Sun, Hanshu He, Yang Zhao, Yiping Wu, Zi Liang Liu, Wenguang Chen, Li State Key Laboratory of Separation Membranes and Membrane Processes School of Materials Science and Engineering Tiangong University Tianjin300387 China School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional Materials Tianjin University Tianjin300350 China College of Materials Science and Engineering Zhejiang University of Technology Hangzhou310014 China Cangzhou Institute of Tiangong University Cangzhou061000 China Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou310027 China

In contrast to small molecules, macromolecules exhibit distinctive characteristics due to their higher potential energy (EP). These include elevated viscosity, enhanced tensile strength, cohesiveness, and stability. The EP of macromolecules can be modulated through the design of side groups, but this approach may also alter chemical properties. This study introduces an α-methylation strategy that significantly enhances EP without modifying the structure of these side groups. This increase in EP induces a transition in the rheological behavior of polymer systems from a rubbery to a glassy state. Concurrently, it improves hygrothermal tolerance without changing dynamic bond groups. The application of this ultra-high EP strategy results in substantial enhancements in traditional acrylic adhesives: a 1500% increase in adhesion strength and a 33200% rise in adhesion modulus when exposed to hot water. Polymer is endowed with a shape memory function due to ultra-high EP. With the dual interface locking of this function, the adhesion strength can be increased by 70%. This ultra-high EP strategy provides a possible explanation for the origin of vitrification in polymeric systems. © 2025 Wiley-VCH GmbH.

关键词： Macromolecules

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Oxygen/Sulfur Atom Exchange Copolymerization of Carbon Disulfide and Propylene Oxide by a Highly Effective Heterogeneous Berlin Green Catalyst

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Chemical Research in Chinese Universities 2023年第5期39卷 790-796页

作者： Munir Ullah KHAN Safir Ullah KHAN CAO Xiaohan Muhammad USMAN Muhammad Naeem SHAH Abdul GHAFFAR Muhammad HASSAN ZHANG Chengjian ZHANG Xinghong State Key Laboratory of Motor Vehicle Biofuel Technology International Research Center for X PolymersDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027P.R.China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Shanxi 030013P.R.China Hefei National Laboratory for Physical Science at the Microscale School of Life SciencesUniversity of Science and Technology of ChinaHefei 230027P.R.China Key Laboratory of Macromolecular Synthesis and Functionalization(Ministry of Education) International Research Center for X PolymersDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027P.R.China College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027P.R.China Advanced Materials Research Center Zhejiang University-University of Illinois at Urbana-Champaign Institute(ZJU-UIUC)Haining 314400P.R.China

In this study,we report that Berlin Green(FeFe-BG)framework exhibits superior performance in the catalytic coupling of carbon disulfide(CS_(2))and propylene oxide(PO)to generate a random copolymer containing thioether,propylene monothiocarbonate and ether *** and sulfur atom exchange was detected in polymeric and cyclic thiocarbonate byproducts and utilized to modulate the copolymerization of CS_(2)and propylene *** coupling of PO and CS_(2)was selective for copolymer formation under various reaction conditions.^(1)H and^(13)C NMR spectroscopy determined two distinct polymer linkages and two cyclic *** number average molecular weights ranged from 6.4 kg/mol to 10.5 kg/mol,with a comparatively low polydispersity of *** CS_(2)/PO molar feed ratio had a significant impact on the O/S exchange process;the ratio of cyclic thiocarbonate byproducts could be efficiently regulated by tuning the CS_(2)molar feed ratio.

关键词： Carbon disulfide Copolymerization Prussian Blue analogue Heterogeneous catalysis Berlin Green

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Dynamic structural controlment for the functionalization of polyelectrolyte multilayer films

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Supramolecular Materials 2022年第1期1卷 100016-100016页

作者： Huang, Wei-Pin Hu, Jia-Qi Qian, Hong-Lin Ren, Ke-Feng Ji, Jian MOE Key Laboratory of Macromolecular Synthesis and Functionalization International Research Center for X Polymers Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China

Polyelectrolyte multilayer films (PEMs) fabricated from the layer-by-layer (LbL) assembly technique have attracted wide interests in the past several decades. Driven and stabilized by electrostatic interaction, the PEMs are sensitive with the external stimuli, contributing to the dynamic tunability of film structures. Compared with adjusting the film structures during assembled procedures, it is more convenient and flexible to control the physical structures of PEMs employing post-treatments. In this review, the different strategies for effectively regulating PEMs’ structures based on the post-treatment, as well as the functionalization of these prepared structural films are discussed. At last, perspectives are provided for the future development directions, aiming to provide opportunities and a novel pathway for microstructural PEMs. © 2022 The Author(s)

关键词： Functional coatings Layer-by-layer assembly Polyelectrolyte multilayer films Structural controlment

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Minimally Invasive Delivery of Human Umbilical Cord-Derived Mesenchymal Stem Cells by an Injectable Hydrogel Via Diels-Alder Click Reaction for the Treatment of Intrauterine Adhesions

SSRN

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SSRN 2023年

作者： Hu, Sentao Dai, Yangyang Xin, Liaobing Zheng, Xiaowen Ye, Zi Zhang, Songying Ma, Lie MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou310058 China Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province Assisted Reproduction Unit Department of Obstetrics and Gynecology Sir Run Run Shaw Hospital School of Medicine Zhejiang University Hangzhou310016 China

Intrauterine adhesions (IUA) are the most common cause of uterine infertility, and conventional treatments have not consistently achieved satisfactory pregnancy rates. Stem cell therapy shows promising potential for the clinical treatment of IUA. Although various advanced biomaterials have been designed for delivering stem cells to the uterine cavity, there remain significant challenges, particularly in devising therapeutic strategies for clinical application that minimize surgical incisions and conform to the intricate structure of uterine cavity. Herein, an injectable hydrogel loaded with human umbilical cord-derived mesenchymal stem cells (UCMSCs) was synthesized via the Diels-Alder click reaction for endometrial regeneration and fertility restoration, exhibiting suitable mechanical properties, good biocompatibility, and desirable degradation properties. Notably, this hydrogel permitted minimally invasive administration and integrated seamlessly with surrounding tissue. Our study revealed that the UCMSCs-laden injectable hydrogel enhanced cell proliferation, migration, angiogenesis, and exhibited anti-fibrotic effects in vitro. The implantation of this hydrogel significantly facilitated endometrium regeneration and restored fertility in a rat endometrial damage model. Mechanistically, in vivo results indicated that the UCMSCs-laden injectable hydrogel effectively promoted macrophage recruitment and facilitated M2 phenotype polarization. Collectively, this hydrogel demonstrated efficacy in regenerating damaged endometrium, leading to the restoration of fertility. Consequently, it holds promise as a potential therapeutic strategy for endometrial damage and fertility decline arising from intrauterine adhesions. © 2023, The Authors. All rights reserved.

关键词： Adhesion

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Erratum to “Supramolecular microgels/microgel scaffolds for tissue repair and regeneration” [Supramolecular Materials 1 (2022) 100006]

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Supramolecular Materials 2025年 4卷

作者： Kai Wang Zhaoyi Wang Haijun Hu Changyou Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China

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Three-dimensional printing of graphene-based materials for energy storage and conversion

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SusMat 2021年第3期1卷 304-323页

作者： Yanqiu Jiang Fan Guo Yingjun Liu Zhen Xu Chao Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringKey Laboratory of Adsorption and Separation Materials&Technologies of Zhejiang ProvinceZhejiang UniversityHangzhouP.R.China State Key Lab of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhouP.R.China National Special Superfine Powder Engineering Research Center Nanjing University of Science and TechnologyNanjingP.R.China

Developing high-performance energy storage and conversion(ESC)device relies on both the utilization of good constituent materials and rational design of assembly ***-based materials,due to their superior properties like high electrical/thermal conductivity,large surface area,and unique optical properties,have been extensively reported for ESC *** emerging three-dimensional(3D)printing techniques,especially extrusion-based direct ink writing technique,have brought a revolutionary improvement in structure control accuracy and designing capability to graphene-based macro-assemblies,triggering a boost in functionalities and performances of graphene-based ESC *** these circumstances,understanding the very recent progress of 3Dprinted graphene materials and their design philosophy to bring new concepts for material designs and address the requirements for high-performance ESC devices are urgently *** this review,we aim to outline recent developments in 3D printing of graphene-based materials and their applications in ESC *** requirements and theoretical analysis for preparation printable inks are discussed,as well as feasible GO ink preparation strategies in existing *** representative explorations of 3D-printed graphenematerials in ESC applications like batteries,supercapacitors,solar steam generators,and electro-thermal conversion are also *** study attempts to provide a comprehensive overview of the progresses and limitations of present 3D printed graphenematerials,and seeks to enlighten the opportunities and orientations of future research in this field.

关键词： 3D printing direct ink writing energy storage and conversion graphene

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