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SSRN 2022年

作者： Wang, Jiaqing Li, Zheng Ming, Xin Li, Peng Chang, Dan Peng, Li Gao, Chao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Key Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang Province International Research Center for X Polymers Zhejiang University 38 Zheda Road Hangzhou310027 China Research Institute of Frontier Technology ZJU-Hangzhou Global Scientific and Technological Innovation Centre School of Micro-Nano Electronics Zhejiang University 733 Jianshe San Road Hangzhou311215 China

Graphene assemblies exhibit prominent properties because of the high-performing graphene sheets serving as structural units as well as the ingenious design of assembled structures. However, the diversity of structural features is limited by the lack of creativity while keeping using graphene sheets as building blocks. Meanwhile, homogeneous architectures acquired from ordinary assembling strategies appear to be insufficient for several advanced applications. Here, using as-prepared 1D graphene oxide fibers as the basic structural elements, we achieve arbitrary graphene assemblies ranging from 2D papers to 3D aerogels through a wet-fusion method. The wet-fusing assembly is spontaneous and easily controllable which also provides strong interconnection between the unit fibers. Unlike the conventional homogeneous graphene assemblies, these fiber-assembled materials have hierarchical structures with programmable fibrous textures, thus are more flexible in characteristic design. Our methodology brings forward a way to expand the family of graphene assemblies and is also an efficient strategy to pursue functional graphene structures. © 2022, The Authors. All rights reserved.

关键词： Graphene

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A real-time ATP biosensor based on gradient porous hollow fiber membrane bioreactor with di-enzyme loading

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Microchemical Journal 2025年 214卷

作者： Ma, Shuyan Hu, Mengjia Zheng, Kaijie Bai, Mingxia Sun, Tongtong Bao, Yuheng Xu, Zhikang Chen, Dajing Huang, Xiaojun Key Laboratory of Macromolecular Synthesis and Functionalization (MOE) Engineering Research Center for Membrane and Water Treatment (Ministry of Education) Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China College of Pharmacy Hangzhou Normal University Hangzhou 311121 China

This study presents a novel ATP biosensor based on gradient-pore hollow fiber membranes (GPF) bioreactor with di-enzyme immobilization, enabling real-time monitoring of extracellular ATP release. Carbon nanotubes (CNT) were strategically affixed outside the hollow fiber membrane through vacuum filtration, establishing a three-dimensional conductive network. Platinum nanoparticles (Pt) were electrochemically deposited to enhance catalytic capability. The resulting GPF-CNT/Pt-DE biosensor exhibited high selectivity, excellent long-term stability, and good biocompatibility for simultaneous detection of glucose and ATP. The biosensor maintained 98.06 % (glucose) and 89.83 % (ATP) current responses post 4-day, 4 °C storage. The response of excess common interferents only accounted for 6.92 % of the ATP response. Notably, the biosensor facilitated in-situ monitoring of ATP secretion by culturing living cells within the GPF lumen, providing dynamic insights into cellular responses. This electrochemical approach, characterized by low instrument cost, addresses limitations associated with other detection methods and holds promise for advancing real-time and in-situ monitoring in diverse biomedical applications. © 2025

关键词： ATP Enzymatic bioelectrode Hollow fiber membrane In situ detection

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Magnetically Induced Anisotropic Conductive Hydrogels for Multidimensional Strain Sensing and Magnetothermal Physiotherapy

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SSRN 2023年

作者： Zhang, Xuehui Lang, Bo Yu, Wenwen Jia, Lan Zhu, Fengbo Xue, Yanru Wu, Xiaogang Qin, Yixian Phil Chen, Weiyi Wang, Yanqin Zheng, Qiang College of Materials Science & Engineering Taiyuan University of Technology Taiyuan030024 China College of Biomedical Engineering Taiyuan University of Technology Taiyuan030024 China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan030024 China Dept. of Biomedical Engineering State University of New York at Stony Brook New York11794 United States Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou310027 China

The development of flexible strain sensors with multidimensional sensing and physiotherapy abilities simultaneously is brilliant for the advancement of wearable sensing electronics. Herein, a composite hydrogel with anisotropic electromechanical properties and excellent magnetothermal capabilities was developed based on a magnetic field pre-induction strategy. Specifically, the as-developed two-dimensional Fe3O4@MXene nanohybrids were induced to be orientationally aligned within the polyvinyl alcohol (PVA) network for conductive hydrogels with anisotropic topology structures. Due to the as-optimized composite hydrogel exhibiting different conductivities in parallel and vertical directions, it can be developed into a multidimensional strain sensor, which is suitable for strain sensing in orthogonal directions with distinguishable gauge factors (such as GF = 3.20, while GF⊥ = 1.78 in the tensile strain range of 0 ~ 60%) and relatively fast response time (t = 74.47 ms, t⊥ = 157.63 ms). Furthermore, the composite conductive hydrogels can also be assembled into a 3D distribution array for detecting the magnitude and spatial distribution of stress. In addition, it also exhibits excellent magnetothermal physiotherapy capabilities. In summary, it is a promising candidate for next-generation multidimensional flexible sensors with rehabilitation assistant functions. © 2023, The Authors. All rights reserved.

关键词： Hydrogels

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Tough Poly(L-DOPA)-containing Double Network Hydrogel Beads with High Capacity of Dye Adsorption

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Chinese Journal of Polymer Science 2018年第11期36卷 1251-1261页

作者： Pei-Bin Zhang An-Qi Tang Zhang-Hui Wang Jing-Yu Lu Bao-Ku Zhu Li-Ping Zhu Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University

Developing a low-cost and well-recyclable adsorbent with high adsorption capacity is greatly desirable in dye wastewater treatment. Here, we demonstrate a kind of novel tough and reusable hydrogel beads with quite high capacity of dye adsorption via incorporating mussel-bioinspired poly（L-DOPA）（PDOPA） into alginate/poly（acrylamide） double network （DN） hydrogels. The synthesized PDOPA nanoaggregates were introduced into the DN hydrogels by simple one-pot mixing with the monomers prior to polymerization. The fabricated hydrogel beads exhibited high mechanical strength and good elastic recovery due to the interpenetrating Ca2＋-alginate and poly（acrylamide） networks. It was shown that the beads exhibited relatively high dye adsorption capacity compared to other adsorbents reported in literature, and the introduction of PDOPA with an appropriate amount raised the adsorption capacity. It is believed that the addition of PDOPA and the matrix of double network architecture contributed synergistically to the high adsorption capacity of hydrogel beads. Moreover, the desorption of dyes could be easily realized via rinsing in acidic water and ethanol solution. The hydrogel beads remained the high adsorption capacity even after 5 times of adsorption and desorption cycles. This tough and stable hydrogel with high adsorption capacity may have potential in treatment of dye wastewater released by textile dyeing industry.

关键词： Dye adsorption Hydrogel beads Poly（L-DOPA） Double network High strength

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Ppr/Epdm/Poe-G-Ma/Ommt Nanocomposites with Superior Low-Temperature Toughness Based on Embedded Ommt within Compound Rubber Dispersion Phase

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SSRN 2024年

作者： Shangguan, Yonggang Qiu, Biwei Li, Zhi Chen, Feng Shi, Jiangao Zhang, Mingyu Zheng, Qiang School of Materials and Chemistry University of Shanghai for Science and Technology Shanghai200093 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou310027 China East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Shanghai200090 China School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi’an710129 China College of Materials Science & Engineering Taiyuan University of Technology Taiyuan030024 China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan030024 China

A new approach to produce polypropylene random copolymer/ethylene propylene diene monomer/polyolefin elastomers modified with maleic anhydride/organic modified nanomontmorillonite (PPR/EPDM/POE-g-MA/OMMT) nanocomposites with superior low-temperature toughness was conducted. The brittle-ductile transition temperature (Tbd) of PPR/EPDM/POE-g-MA/OMMT nanocomposites reduced from -20 °C to -40 °C. The incorporation of POE-g-MA results in the distribution of OMMT changing from the interfacial distribution into dispersed inside rubber phase and a compound rubber dispersed phase in PPR/EPDM/POE-g-MA/OMMT nanocomposites was comprised of EPDM, POE-g-MA and embedded OMMT. The synergistic effect of POE-g-MA and OMMT was considered to result from the special compound rubber dispersed phase consisting of EPDM and POE-g-MA as well embedded OMMT, which led to the reduction in space between rubber domains and the increase in internal friction and ultimately brought about the remarkable enhancement in mechanical properties. © 2024, The Authors. All rights reserved.

关键词： Rubber

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Black phosphorus nanoflakes as morphology modifier for efficient fullerene-free organic solar cells with high fill-factor and better morphological stability

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Nano Research 2019年第4期12卷 777-783页

作者： Weitao Yang Long Ye Fenfa Yao Chuanhong Jin Harald Ade Hongzheng Chen State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and Functionalization& Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China Department of Physics Organic and Carbon Electronics Laboratory (ORaCEL) North Carolina State University Raleigh NC 27695 USA State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China

Morphology of the donor:acceptor blend plays a critical role in the photovoltaic performance of the organic solar cells (OSCs).Herein,liquid-phase-exfoliated black phosphorus nanoflakes (BPNFs),for their outstanding electronic property and good compatibility to solution process,were applied to fullerene-free OSCs as morphology *** by X-ray scattering measurements,the PTB7-Th:IEICO-4F blends incorporated with BPNFs exhibit more ordered π-π stacking and promoted domain purity,contributing to lower charge transport resistance and suppressed charge recombination within the bulk heterojunction (BHJ).As a result,a high fill factor (FF) of 0.73 and a best power conversion efficiency (PCE) of 12.2% were obtained for fullerene-free OSCs based on PTB7-Th:IEICO-4F blends incorporating with BPNFs,which is among the highest FF of the as-cast fullerene-free OSCs with PCE over 12%.More importantly,the embedded BPNFs help to improve the morphological stability of the devices probably by retarding the phase mixing in the BHJ during the aging ***,analogous enhancements were observed in another fullerene-free OSCs based on PBDB-T:*** a word,this work provides a new strategy of using two-dimentional nanoflakes as facile and universal morphology modifier for efficient fullerene-free OSCs.

关键词： fullerene-free organic solar cells black phosphorus nanoflakes morphology tuning device stability

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The Local Creep Responses of Wood-Adhesive Interphase and its Role in Creep Strain Dissipation of Laminated Veneer Lumber

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SSRN 2023年

作者： Xu, Shuwei Cao, Yizhong Yang, Pei Liu, Xiaohan Tang, Ruixing Yan, Yutao Zhang, Mingyu Shangguan, Yonggang Wu, Qiang College of Chemistry and Materials Engineering Zhejiang Agriculture and Forestry University Hangzhou311300 China National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization Hangzhou311300 China College of Materials Science and Engineering Nanjing Forestry University Nanjing210037 China School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi’an710129 China Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou310027 China

The booming calls for a circular economy bring about the rise of timber architectures with low environmental impacts, in which laminated veneer lumber (LVL) mainly acts as the load-bearing element. Nevertheless, the creep deformation of LVL stands out as an attention-worthy problem that endangers the long-term safety of timber architectures. Here, the creep strain dissipation of LVL and the discrepant creep responses of the wood-adhesive interphase were evaluated, aiming to make a junction of the macroscopic creep deformation of LVL with the creep responses of the wood-adhesive interphase. Results demonstrated the non-linear elevation of creep deformation of LVL as raising the creep stress from 30 to 70% of the fracture stress. In particular, the premature fracture of LVL facing axial compression was confirmed at 70% of the fracture stress. Non-contact optical measurement and finite element simulation revealed that the creep strain dissipates transiting or parallel to the wood-adhesive interphase, depending on the specific loading regimes, which underscores the critical role of local creep responses of the wood-adhesive interphase to the whole strain dissipation of LVL. The unrecoverable and accelerated deformation of phenol-formaldehyde adhesive and the wood cell walls without adhesive infiltration caused cracks in the wood-adhesive interphase. It can be the primary trigger for the significant creep deformation of LVL. This work advances the fundamental understanding of the plausible triggering of creep deformation of LVL. It also sheds light on futural methodologies to improve the creep resistance of LVL and the long-term safety of timber architectures through interfacial engineering. © 2023, The Authors. All rights reserved.

关键词： Creep

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Highly Selective Preparation and Depolymerization of Chemically Recyclable Poly(cyclopentene carbonate) Enabled by Organoboron Catalysts

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Angewandte Chemie 2022年第46期134卷

作者： Dr. Guan-Wen Yang Yuhui Wang Huan Qi Dr. Yao-Yao Zhang Xiao-Feng Zhu Chenjie Lu Li Yang Prof. Dr. Guang-Peng Wu MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Zhe Da Road 38 Hangzhou 310027 China

Poly(cyclopentene carbonate) (PCPC) produced by copolymerization of CO 2 and cyclopentene oxide (CPO) is a promising but challenging chemical recyclable polymer that has high potential in minimizing plastic pollution and maximizing CO 2 utilization. Currently, problems remain to be solved, include low reactivity of toxic metal catalysts, inevitable byproducts, and especially the ambiguous mechanism understanding. Herein, we present the first metal-free access to PCPC by using a series of modular dinuclear organoboron catalysts. PCPC was afforded in an unprecedented catalytic efficiency of 1.0 kg of PCPC/g of catalyst; while the depolymerization of PCPC abides by a combination pathway of random chain scission and chain unzipping, returning CPO in near-quantitative yield (>99 %). The preparation and depolymerization of PCPC along with in depth understanding of related mechanisms would be helpful for further development of advanced catalysts and recyclable plastics.

关键词： Alternating Copolymerization Carbon Dioxide Organoboron Catalysts Polycarbonate Recyclable Polymer

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Adaptable hydrogel with reversible linkages for regenerative medicine:Dynamic mechanical microenvironment for cells

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Bioactive Materials 2021年第5期6卷 1375-1387页

作者： Zongrui Tong Lulu Jin Joaquim Miguel Oliveira Rui LReis Qi Zhong Zhengwei Mao Changyou Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China 3B’s Research Group I3Bs-Research Institute on BiomaterialsBiodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineAveParkZona Industrial da Gandra4805-017Barco GMRPortugal ICVS/3B’s-PT Government Associate Laboratory Braga/GuimarãesPortugal The Discoveries Centre for Regenerative and Precision Medicine Headquarters at University of MinhoAvepark4805-017BarcoGuimarãesPortugal Key Laboratory of Advanced Textile Materials&Manufacturing Technology Ministry of EducationNational Base for International Science and Technology Cooperation in Textiles and Consumer-Goods ChemistryZhejiang Sci-Tech University310018HangzhouChina

Hydrogels are three-dimensional platforms that serve as substitutes for native extracellular *** materials are starting to play important roles in regenerative medicine because of their similarities to native matrix in water content and *** would be very advantagoues for researchers to be able to regulate cell behavior and fate with specific hydrogels that have tunable mechanical properties as biophysical *** developments in dynamic chemistry have yielded designs of adaptable hydrogels that mimic dynamic nature of extracellular *** current review provides a comprehensive overview for adaptable hydrogel in regenerative medicine as ***,we outline strategies to design adaptable hydrogel network with reversible linkages according to previous findings in supramolecular chemistry and dynamic covalent ***,we describe the mechanism of dynamic mechanical microenvironment influence cell behaviors and fate,including how stress relaxation influences on cell behavior and how mechanosignals regulate matrix ***,we highlight techniques such as bioprinting which utilize adaptable hydrogel in regenerative *** conclude by discussing the limitations and challenges for adaptable hydrogel,and we present perspectives for future studies.

关键词： Adaptable hydrogel Dynamic mechanical microenvironment Supramolecular chemistry Dynamic covalent chemistry Yes-associated protein

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Effective enhancement of the emission efficiency of tetraphenylporphyrin in solid state by tetraphenylethene modification

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Chinese Chemical Letters 2019年第1期30卷 143-148页

作者： Nan Jiang Yijia Wang Anjun Qin Jing Zhi Sun Ben Zhong Tang MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Guangdong Innovative Research Team State Key Laboratory of Luminescent Materials and Devices South China University of Technology Department of Chemistry Institute for Advanced Study Institute of Molecular Functional Materials and State Key Laboratory of Molecular Neuroscience The Hong Kong University of Science & Technology

Tetraphenylporphyrin(TPP) is a typical red-emitting luminogen showing evident aggregation caused quenching(ACQ) effect. To enhance its emission efficiency in solid state, four tetraphenylethene(TPE)units were attached to the four meso-positions of TPP core via ester group through a facile and efficient route. The derived compound(4(TPE-COO)-TPP) emits red fluorescence(peak at 655 nm) with a good quantum efficiency(F) of 7.5%, which is much higher than that of TPP(Φ～ 0.1%). In molecular aggregate formed in tetrahydrofuran(THF) and water mixtures, 4(TPE-COO)-TPP has a relative high F of 12%. The evidently subdued ACQ behavior can be ascribed to the propeller shape and bulky size of the TPE units,which prevent the close packing and strong p-p interaction of TPP cores. The loose molecular packing and weak interchromophore interactions were validated by different characterization methods including UV-visible absorption, steady state and transient fluorescence spectroscope, X-ray diffraction and scanning electronic microscope observations. It is noted that 4(TPE-COO)-TPP has an emission efficiency of 14.4% in dilute THF solution. This is due to the conjugation break between the TPP and TPE moieties, the rotational and vibrational motions of the phenyl groups cannot quench the fluorescence of 4(TPE-COO)-TPP.

关键词： Aggregation-induced emission Tetraphenylethene Porphyrin Red emission Molecular packing

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