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Large enhancements in gelation behavior of wheat gliadins by incorporation of low concentrations of methylcellulose

Chinese Chemical Letters 2009年第5期20卷 623-626页

作者： Yi Hu Song Ling Fang Li Qiang Zheng Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of Education Zhejiang University Hangzhou 310027 China

Influence of non-gelling methylcellulose （MC） on gelation behavior of wheat gliadins in 13 wt% alkaline propanol/water （50：50, v/v） solution was investigated using dynamic theological time sweep test. Increasing MC concentration （CMC） up to CMC = 1 wt% caused a significant reduction in gelation time （tget） of the solution and an increase in loss tangent （tan δ） value of the resultant gel at T 〈 30 ℃.

关键词： Gliadin Gelation Rheology Methylcellulose （MC）

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High-efficiency organic solar cells with low voltage-loss of 0.46 V

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Chinese Chemical Letters 2020年第7期31卷 1991-1996页

作者： Zhi-Peng Yu Xue Li Chengliang He Di Wang Ran Qin Guanqing Zhou Zhi-Xi Liu Thomas Rieks Andersen Haiming Zhu Hongzheng Chen Chang-Zhi Li MOE Key Laboratory of Macromolecular Synthesis and Functionalization State Key Laboratory of Silicon MaterialsDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China Department of Chemistry Zhejiang UniversityHangzhou 310027China

The recent evolution of active components yielded brilliant progresses for organic solar cells(OSCs),yet the mechanism is needed to be clearly *** this wo rk,two electron acceptors,a linear SN6-2Br and a V-shaped BTP-2Br,are developed with nitrogen atoms introduced to replace the traditional sp3-hybridized carbon in the fused ***-2Br possesses an electron-de ficient central core,which exhibits slightly blue-shifted absorption as well as deepened HOMO-level compared with *** corresponding photovoltaic performance from V-shaped BTP-2Br based devices exhibit superior performance especially in short-circuit current(Jsc),despite an enhanced absorption and charge carrier mobilities for *** primary reason for the higher JSC from BTP-2Br is faster exciton diffusion and dissociation in ble nds,than those of *** a result,PBDB-TF:BTP-2Br based devices achieve a power conversion efficiency(PCE)of 13.84%with an voltage-loss of only 0.46 V,which is one of the lowest values ever ***,we fabricated semitransparent OSCs that exhibit an excellent PCE of 9.62%with average visible transparency of 20.1%.

关键词： Organic solar cells High efficiency Low voltage-loss Semitransparent OSCs Electron-defficient central core

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Graphene fiber based supercapacitors:Strategies and perspective toward high performances

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Journal of Energy Chemistry 2018年第1期27卷 6-11页

作者： Qiuyan Yang Zhen Xu Chao Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization.Department of Polymer Science and Engineering Key Laboratory of Adsorption and Separation Materials&Technologies of Zhejiang Province.Zhejiang UniversityHangzhou 310027Zhejiang.China

Modern wearable electronics are thirsty for flexible, lightweight energy storage and supply devices. Flexible fiber-shaped supercapacitors, possess good flexibility, high power density, fast charging capability and long cycle life, becoming a promising option for wearable devices. The past decade has witnessed the emergence of graphene fiber based supercapacitors（GFSCs） as one of the most active vicinity in fiber-supercapactiors, for their excellent properties including high surface area, chemical stability, excellent electrical conductivity, lightweight and mechanical properties. In this perspective, we introduced the basic energy storage mechanisms of GFSCs, followed by the analysis in improving their overall performances, recent advances, and a conclusive discussion on the challenges and opportunities.

关键词： Graphene Fiber Two-dimensional materials Supercapacitors Energy storage

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Healing the degradable organic–inorganic heterointerface for highly efficient and stable organic solar cells

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InfoMat 2022年第2期4卷 162-170页

作者： Yangdan Tao Haoran Liu Di Wang Feng Zhao Zeng Chen Haiming Zhu Hongzheng Chen Chang-Zhi Li State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhouChina Department of Chemistry Zhejiang UniversityHangzhouChina

The heterointerface between the contacted organic and inorganic semiconductors critically affects the charge extraction,hence overall performance of organic optoelectronics,especially for organic solar cells(OSCs).Herein,we develop an effective interfacial strategy that simultaneously boosts the chemical,electric,and electronic properties of the organic–inorganic heterointerface of the derived OSCs,through implanting conjugated molecules as selfassemble monolayers(SAMs)to metal oxide nanoparticles(MO NPs).As results,SAM passivated zinc oxide nanoparticles(ZnO NPs)as electron transport layers(ETLs)not only enable the best performed OSCs containing MO ETLs,but also exhibit the most desirable thickness insensitive features(up to 300 nm).In addition,SAM-ZnO ETLs help also substantially improving the photostability of the derived ***,this work can be beneficial to the further development of high-performance and cost-effective OSCs.

关键词： charge extraction organic-inorganic heterointerface organic solar cells photostability

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Modification effects of amphiphilic comb-like polysiloxane containing polyether side chains on the PVDF membranes prepared via phase inversion process

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中国高等学校学术文摘·化学 2008年第4期3卷 432-439页

作者： Yanling QIAN Jianhua WANG Baoku ZHU Mei ZHANG Chunhui DU Youyi XU Institute of Polymer Science Zhejiang UniversityKey Laboratory of Macromolecular Synthesis and FunctionalizationMinistry of EducationHangzhou 310027China

Amphiphilic comb-like polysiloxane (ACPS) containing polyether side chains was used as the modifica-tion reagent in the preparation of hydrophilic porous poly (vinylidene fluoride) (PVDF) membranes via a phase inversion process. The effects of ACPS on morphology, crystallinity, mechanical properties, reservation of ACPS in the phase inversion process, chemical structure, hydro-philicity and filterability performance of porous PVDF membranes were discussed. It was found that the addition of ACPS would result in the delayed demixing which yields 'sponge-like' sublayers and longer crystallization time during the membrane formation process. It was revealed that O/F ratios of the bulk membrane were almost the same as those of the corresponding casting solutions which obviously indicated the high reservation of ACPS in the membrane formation process. The fact that the O/F ratios in the membrane surface layers were much higher than those in the bulk membrane proved the enrichment of ACPS on the surface. The filterability experiments and water contact angle testing proved the hydrophilicity of the blend membranes. Through a schem-atic model, the mechanism relating the membrane struc-ture and performance was interpreted. From the observed results, it can be concluded that ACPS acts as a potential candidate material for preparing PVDF membranes with extraordinary hydrophilicity and filterability.

关键词： poly(vinylidene fluoride) porous membrane comb-like polysiloxane containing polyether side chains surface enrichment hydrophilicity phase inversion

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Preparation and properties of wheat gluten/silica composites

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Science China Chemistry 2009年第3期52卷 257-260页

作者： SONG YiHu ZHENG Qiang ZHOU WenCe Department of Polymer Science and Engineering Zhejiang UniversityHangzhou 310027China Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of Education Zhejiang UniversityHangzhou 310027China

Wheat gluten (WG)/silica (SiO2) hybrids were prepared through in-situ synthesis of SiO2 in WG disper-sion of aqueous ammonia. The hybrids with different SiO2 contents were mixed with glycerol plasticizer to form cohesive dough and the dough was compressively molded to form cross-linked sheets. Morphology, moisture absorption, protein solubility in water, tensile mechanical properties and dynamic rheological behavior of the WG/SiO2 composites were investigated in relation to SiO2 contents.

关键词： wheat gluten silica composites properties

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Inverted Perovskite Solar Cells Based on Small Molecular Hole Transport Material C8-Dioctylbenzothienobenzothiophene

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Chinese Journal of Chemistry 2019年第12期37卷 1239-1244页

作者： Xiaomei Lian Jiehuan Chen Yingzhu Zhang Gang Wu Hongzheng Chen State Key Laboratory of Silicon Materials Zhejiang UniversityHangzhouZhejiang 310027China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhouZhejiang 310027China

Summary of main observation and conclusion The small organic molecular Dioctylbenzothienobenzothiophene(C8-BTBT)has been explored as hole transport material(HTM)to replace PEDOT:PSS in inverted perovskite solar cells(PVSCs).MAPbl3 perovskite films depositd onto C8-BTBT are smooth and uniform,with negligible residual of Pbl2 and large grain size even larger than 1μ*** champion C8-BTBT based devices reached a high power conversion efficiency(PCE)of 15.46%with marginal hysteresis,much higher than that of 11.50%achieved using PEDOT:***,devices adopting C8-BTBT as substrate show superior stability compared with the PEDOT:PSS based devices when stored under ambient conditions with a relative humidity of(25+5)%.

关键词： perovskite Solar replace

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A GENERAL APPROACH TO DETERMINING THE EVOLUTION OF MOLECULAR WEIGHT DISTRIBUTION CURVES OF LINEAR POLYMERS UNDERGOING CHAIN SCISSION

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Chinese Journal of Polymer Science 2013年第7期31卷 1056-1060页

作者： Zhuo-li Lin Jun Luo Zheng-jian Chen Ke-hua Tu 王利群王衍伟 MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang University Department of Polymer Science and Engineering College of ChemistryChemical Engineering and Materials ScienceSoochow University

A numerical method is developed to compute the development of molecular weight distribution （MWD） curves of linear polymers undergoing chain scission. The method can be applied to complex chain scission kinetics and for arbitrarily complex initial MWD curves. Our method is based on the method of lines （MoL）. Different from the existing numerical scheme, we propose the use of logarithmically spaced points. This development ensures the accuracy of the computed MWD curves at low molecular weights, and it does not require a very fine discretization to produce an accurate result.

关键词： Polymer degradation Reaction kinetics Molecular weight distribution Modeling.

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Technoeconomically competitive four-terminal perovskite/graphenesilicon tandem solar cells with over 20% efficiency

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Journal of Energy Chemistry 2021年第12期30卷 477-483,I0011页

作者： Pengjie Hang Jingkun Cong Ge Li Lijian Zuo Chenxia Kan Biao Li Jiangsheng Xie Yuxin Yao Ying Wang Hongzheng Chen Deren Yang Xuegong Yu State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027ZhejiangChina State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina

Perovskite/Silicon(PS) tandem solar cells have attracted much interest over recent years. However, the most popular crystalline silicon solar cells utilized in tandems require complicated fabrication processes mainly including texturization, diffusion, passivation and metallization, which takes up much cost in photovoltaic market. Here, we report a facile graphene/silicon(Gr/Si) solar cell featuring of lowtemperature( 200 °C) processing and an efficiency of 13.56%. For reducing the heat dissipation loss of high energy photon, the perovskite solar cell(PSC) with a wide band gap of 1.76 e V was adopted as the top cell for the tandem. To reduce the loss of parasitic absorption in hole transport layers(HTLs),thickness of Spiro-OMe TAD is re-optimized by compromising the efficiency and the optical transmittance of the devices. As a result, the semitransparent top perovskite solar cell yields a highest efficiency of13.35%. Furthermore, we firstly achieved a low-temperature-processed four-terminal(4-T) perovskite/graphene-silicon(PGS) heterojunction tandem solar cell with the efficiency of 20.37%. The levelized cost of electricity(LCOE) of PGS 4-T modules were estimated to a competitive price, exhibiting much greater potential for practical application compared to that of PS 4-T modules.

关键词： Perovskite/graphene-silicon tandem sola cells Low temperature Transmittance Technoeconomic competitiveness

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synthesis OF POLYELECTROLYTIC POLYACETYLENE DERIVATIVES BY QUATERNIZATION OF POLY(PYRIDYLACETYLENE)

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Chinese Journal of Polymer Science 2011年第2期29卷 133-140页

作者：孙景志唐本忠 Department of Polymer Science and Engineering MOE of Key Laboratory of Macromolecular Synthesis and FunctionalizationZhejiang University Department of Chemistry The Hong Kong University of Science & TechnologyClear Water BayKowloonHong KongChina

Functional polyacetylenes containing pyridinium side groups（PPyA-MX,X = Br and I） were successfully *** techniques such as ^1H-NMR,^（13）C-NMR,and FTIR spectroscopy were used to characterize the structure of the obtained *** characterization data were well consistent with the expected macromolecular ***-MI had good solubility in polar organic solvents and low solubility in water,while PPyA-MBr had good solubility in both polar organic solvents and water.

关键词： Polyacetylene derivative Polyelectrolyte Characterization Water solubility Thermal stability

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