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[email protected] hybrid nanoparticles with antimicrobial properties from in-situ reduction and NTA polymerization

European Polymer Journal 2019年 121卷

作者： Jiayu Cen Botuo Zheng Yang Yang Jindan Wu Zhengwei Mao Jun Ling Guocan Han MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China MOE Key Laboratory of Advanced Textile Materials & Manufacturing Technology Zhejiang Sci-Tech University Hangzhou 310018 China Department of Radiology Sir Run Run Shaw Hospital School of Medicine Zhejiang University Hangzhou 310016 China

Poly(α-amino acid)s are promising materials due to their excellent biocompatibility and biodegradability. α-Amino acid N-thiocarboxyanhydrides (NTAs), the thio-analogues of the corresponding N-carboxyanhydrides (NCAs), are able to synthesize polypept(o)ides by ring-opening polymerization with the tolerance of hydroxyl’s nucleophilic attack. In this work, polyDOPA-b-polysarcosine (PDOPA-b-PSar, named as DoS) copolymers are synthesized by sequential polymerizations of 3,4-dihydroxy-L-phenylalanine N-thiocarboxyanhydride (DOPA-NTA) and sarcosine N-thiocarboxyanhydride (Sar-NTA) initiated by benzylamine in tetramethylene sulfone. With the reduction of catechol ligand, PDOPA-b-PSar act as the reducing and stabilizing agents for silver nanoparticles. The obtained [email protected] ( [email protected] ) nanoparticles have the average diameters of 81 nm with 10 nm core and narrow distributions. More than 95% bacterial killing efficiency to *** and *** by [email protected] nanoparticles shows the potential for biomedical applications.

关键词： Poly(amino acid)s Ring-opening polymerization Silver nanoparticles Antibacterial agent

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Novel Poly(methyl methacrylate)-based Ionomers Used as Multifunctional Aids to Modify Poly(vinyl chloride)

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Chinese Journal of Polymer Science 2016年第4期34卷 483-490页

作者： Li-na Zhang 宋义虎郑强 Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Zhejiang University Hangzhou 310027 China

Poly（methyl methacrylate）（PMMA） based ionomers with different lanthanum （La（III）） contents （PMMA-XLa） synthesized by free radical solution polymerization were applied to poly（vinyl chloride）（PVC） resins as a kind of multifunctional aids, and their performances were evaluated by measuring the static stability time, initial discoloration, transparency, fusion behavior and tensile strength of the modified PVC. The ionomers with proper lanthanum （La（III）） contents show a better thermal stability efficiency in comparison with traditional stabilizer lanthanum stearate. Meantime, they can accelerate PVC plasticization more efficiently than PMMA. The rigid PVC products stabilized with the ionomers present good transparency and enhanced tensile strength.

关键词： Rigid PVC Ionomers Thermal stability Plasticization Multifunction.

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Poly(vinylidene fluoride)Separators with Dual-asymmetric Structure for High-performance Lithium Ion Batteries

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Chinese Journal of Polymer Science 2016年第12期34卷 1423-1435页

作者： Hong-qing Liang Ling-shu Wan 徐志康 MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Department of Polymer Science and Engineering Zhejiang University

Dual-asymmetric poly（vinylidene fluoride）（PVDF） separators have been fabricated by thermally induced phase separation with dimethyl sulfone （DMSO2） and glycerol as mixed diluents. The separators have a porous bulk with large interconnected pores （-1.0 μm） and two surfaces with small pores （-30 nm）. This dual-asymmetric porous structure endows the separators with higher electrolyte uptake amount and rapider uptake rate, as well as better electrolyte retention ability than the commercialized Celgard 2400. The separators even maintain their dimensional stability up to 160 ℃, at which temperature the surface pores close up, leading to a dramatic decrease of air permeability. The electrolyte filled separators also show high ion conductivity （1.72 ***-1） at room temperature. Lithium iron phosphate （LiFePO4）/lithium （Li） cells using these separators display superior discharge capacity and better rate performance as compared with those from the commercialized ones. The results provide new insight into the design and development of separators for high-performance lithium ion batteries with enhanced safety.

关键词： Polymer separator Lithium ion battery Dual-asymmetric structure Porous membrane Thermally induced phaseseparation.

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Design and optimization of polyphosphazene vesicles for effective delivery of water-soluble drugs in cancer treatments

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Nanomedicine: Nanotechnology, Biology and Medicine 2018年第5期14卷 1837-1837页

作者： Liyan Qiu MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China

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Cover Picture: Anionic Copolymerization of Carbonyl Sulfide with Epoxides via Alkali Metal Alkoxides (Chin. J. Chem. 7/2018)

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Chinese Journal of Chemistry 2018年第7期36卷

作者： Cheng‐Jian Zhang Jia‐Liang Yang Lan‐Fang Hu Xing‐Hong Zhang MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou Zhejiang 310027 China

The cover picture shows a protocol of an anionic copolymerization of carbonyl sulfide (COS) with epoxides via alkali metal alkoxides. COS is an analogue of carbon dioxide (CO 2 ), and can be converted to CO 2 via the carbonic anhydride enzymes widely existing in nature. It causes acid rain, ozonosphere damage and haze by a series of photochemical reactions. Very simple and low‐cost alkali metal alkoxides are shown as effective catalysts, affording highly transparent poly(monothiocarbonate)s with 100% alternating degree, >99% tail‐to‐head (T‐H) content, high number‐average molecular weights with narrow molecular weight distributions. This is an environment‐friendly and atom‐economic process for making sulfur‐containing polymers. More details are discussed in the article by Zhang et al. on page 625–629.

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A novel wet-spinning method of manufacturing continuous bio-inspired composites based on graphene oxide and sodium alginate

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Nano Research 2016年第3期9卷 735-744页

作者： Xiaozhen Hu Sangeetha Rajendran Yuansi Yao Zheng Liu Karthikeyan Gopalsamy Li Peng Chao Gao State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Shanghai 201620 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China

Nacre is a lightweight, strong, stiff, and tough material, which makes it a mimicking object for material design. Many attempts to mimic nacre by various methods resulted in the synthesis of artificial nacre with excellent properties. However, the fabrication procedure was very laborious and time-consuming due to the sequential steps, and only limited-sized materials could be obtained. Hence, a novel design enabling scalable production of high-performance artificial nacre with uniform layered structures is urgently needed. We developed a novel wet-spinning assembly technique to rapidly manufacture continuous nacre- mimic graphene oxide （GO, brick）-sodium alginate （SA, mortar） films and fibers with excellent mechanical properties. At high concentrations, the GO-SA mixtures spontaneously produced liquid crystals （LCs） due to the template effect of GO, and continuous, 6 m long nacre-like GO-SA films were wet-spun from the obtained GO-SA liquid crystalline （LC） dope with a speed of up to 1.5 m/min. The assembled macroscopic GO-SA composites inherited the alignment of the GO sheets from the LC phase, and their mechanical properties were investigated by a joint experimental-computational study. The tensile tests revealed that the maximum strength （0） and Young＇s modulus （E） of the obtained films reached 239.6 MPa and 22.4 GPa, while the maximum values of o and E for the fibers were 784.9 MPa and 58 GPa, respectively. The described wet-spinning assembly method is applicable for a large-scale and fast production of high-performance continuous artificial nacre.

关键词： continuous bio-inspired films sodium alginate graphene oxide wet-spinning method

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Quantitative Design of Bright Fluorophores and AIEgens by the Accurate Prediction of Twisted Intramolecular Charge Transfer (TICT)

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Angewandte Chemie 2020年第25期132卷

作者： Chao Wang Qinglong Qiao Weijie Chi Jie Chen Wenjuan Liu Davin Tan Scott McKechnie Da Lyu Xiao‐Fang Jiang Wei Zhou Ning Xu Qisheng Zhang Zhaochao Xu Xiaogang Liu Fluorescence Research Group Singapore University of Technology and Design 8 Somapah Road Singapore 487372 Singapore CAS Key Laboratory of Separation Science for Analytical Chemistry Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China Department of Physics Kings College London London WC2R 2LS UK Department of Chemistry National University of Singapore 21 Lower Kent Ridge Rd Singapore 119077 Singapore School of Physics and Telecommunication Engineering South China Normal University Guangzhou 510006 China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China

Inhibition of TICT can significantly increase the brightness of fluorescent materials. Accurate prediction of TICT is thus critical for the quantitative design of high‐performance fluorophores and AIEgens. TICT of 14 types of popular organic fluorophores were modeled with time‐dependent density functional theory (TD‐DFT). A reliable and generalizable computational approach for modeling TICT formations was established. To demonstrate the prediction power of our approach, we quantitatively designed a boron dipyrromethene (BODIPY)‐based AIEgen which exhibits (almost) barrierless TICT rotations in monomers. Subsequent experiments validated our molecular design and showed that the aggregation of this compound turns on bright emissions with ca. 27‐fold fluorescence enhancement, as TICT formation is inhibited in molecular aggregates.

关键词： Aggregationsinduzierte Emission BODIPY Molekül-Engineering PRODAN Intramolekularer Ladungstransfer

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Polymeric Membranes with Vertical Pores

Polymeric Membranes with Vertical Pores

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The 4th Hangzhou International Polymer Forum

作者： Zhi-Kang Xu MOE Key Laboratory of Macromolecular Synthesis and Functionalization Zhejiang University Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Department of Polymer Science and Engineering Zhejiang University

Polymer membranes with well-controlled and vertically-oriented pores are of great importance in the applications for water treatment and tissue engineering. Previously, these membranes have been prepared by track-etching, sacrificial templating(colloidal crystals, emulsions, biological materials), breath figures, microphase separation of block copolymers and other selfassembly methods. These "bottom-up" membranes with self-regulated structures could be prepared without the assistance of expensive equipment and clean-room technology, but there is still a long way to the success transition to commercial applications, which requires a precise and reproducible control of membrane properties as well as scalability of the fabrication process. In this work, we report environmental-friendly facile fabrication of such membranes from a broad spectrum of polymer resources including poly(vinylidene fluoride), poly(l-lactic acid), polyacrylonitrile, polystyrene, polysulfone and polypropylene. Our strategy is on the basis of two-dimensional solvent freezing in a thermally induced phase separation. Dimethyl sulfone, diphenyl sulfone, and arachidic acid are selected as green diluents crystallized in the polymer matrices under two-dimensional temperature gradients induced by water at ambient temperature. Parallel Monte Carlo simulations of the lattice polymers demonstrate that the directional process is feasible for each polymer holding suitable interaction with a corresponding solvent. As a typical example of this approach, poly(vinylidene fluoride) membranes exhibit excellent tensile strength, high optical transparence and outstanding separation performance for the mixtures of yeasts and lactobacilli. These membranes are first applied as supports to fabricate forward osmosis membranes with unprecedented water flux. The unique vertical pores provide direct paths for water permeation and salt diffusion, which greatly reduces the internal concentration polarization effect in typical

关键词： membranes vertical pores phase separation diluent crystallization

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Active-layer evolution and （CH3NH3）3Bi2l9-based solar substrate efficiency improvement of cell on TiO2-deposited ITO

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Nano Research 2016年第10期9卷 2921-2930页

作者： Xinqian Zhang Gang Wu Zhuowei Gu Bing Guo Wenqing Liu Shida Yang Tao Ye Chen Chen Weiwei Tu 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 Chemical Engineering Xinjiang Agriculture University Urumqi 830052 China

We systematically investigated the development of film morphology and crystallinity of methyl-ammonium bismuth （Ⅲ） iodide （MA3Bi2I9） through one- step spin-coating on TiO2-deposited indium tin oxide （ITO）/glass. The precursor solution concentration and substrate structure have been demonstrated to be critically important in the active-layer evolution of the MA3Bi2I9-based solar cell. This work successfully improved the cell efficiency to 0.42% （average： 0.38%） with the mesoscopic architecture of ITO/compact-TiOdmesoscopic-TiO2 （meso-TiO2）/ MA3Bi2I9/2,2＇,7,7＇-tetrakis（N,N-di-4-methoxyphenylamino）-9,9＇spiro-bifluorene （spiro-MeOTAD）/MoO3/Ag under a precursor concentration of 0.45 M, which provided the probability of further improving the efficiency of the BiB＋-based lead-free organic-inorganic hybrid solar cells.

关键词： methyl-ammonium bismuth （Ⅲ） iodide organic-inorganic hybridsolar cell TiO2-depostied indium tinoxide （FRO） substrate morphology and crystallinity precursor solution concentration

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Corrigendum to "Untangling the response of bone tumor cells and bone forming cells to matrix stiffness and adhesion ligand density by means of hydrogels" [Biomaterials 188 (2019) 130-143]

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Biomaterials 2020年 231卷 119663页

作者： Tongmeng Jiang Jinmin Zhao Shan Yu Zhengwei Mao Changyou Gao Ye Zhu Chuanbin Mao Li Zheng Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration & Guangxi Collaborative Innovation Center for Biomedicine Life Sciences Institute Guangxi Medical University Nanning 530021 China Department of Orthopaedics Trauma and Hand Surgery The First Affiliated Hospital of Guangxi Medical University Nanning 530021 China Guangxi Key Laboratory of Regenerative Medicine International Joint Laboratory on Regeneration of Bone and Soft Tissue The First Affiliated Hospital of Guangxi Medical University Nanning 530021 China. MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University 38# Zheda Road Hangzhou 310027 China. MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University 38# Zheda Road Hangzhou 310027 China. Electronic address: zwmao@***. Department of Chemistry & Biochemistry Stephenson Life Sciences Research Center University of Oklahoma 101 Stephenson Parkway Norman OK 73019-5300 USA. Department of Chemistry & Biochemistry Stephenson Life Sciences Research Center University of Oklahoma 101 Stephenson Parkway Norman OK 73019-5300 USA School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China. Electronic address: cbmao@ou.edu. Guangxi Engineering Center in Biomedical Materials for Tissue and Organ Regeneration & Guangxi Collaborative Innovation Center for Biomedicine Life Sciences Institute Guangxi Medical University Nanning 530021 China. Electronic address: zhengli224@***.

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