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Bistable polymer Actuators: Bioinspired Electrically Activated Soft Bistable Actuators (Adv. Funct. Mater. 35/2018)

Advanced Functional Materials 2018年第35期28卷

作者： Huiqi Shao Shuzhen Wei Xin Jiang Douglas P. Holmes Tushar K. Ghosh Department of Textile Engineering Chemistry and Science Fiber & Polymer Science Program North Carolina State University Raleigh NC 27695 USA Department of Mechanical Engineering Boston University Boston MA 02215 USA

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Preparation and characterisation of polymer membranes enhanced with medicinal plant extract 17

Preparation and characterisation of polymer membranes enhanc...

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17th International Multidisciplinary Scientific Geoconference, SGEM 2017

作者： Caprarescu, Simona Purcar, Violeta Miron, Alexandra Raluca Radu, Anita Laura Neagu, Mihaela Pascu Faculty of Applied Chemistry and Materials Science Department of Inorganic Chemistry Physical Chemistry and Electrochemistry Politehnica University of Bucharest Romania National Research and Development Institute for Chemistry and Petrochemistry – ICECHIM Polymer Department Bucharest Romania Faculty of Applied Chemistry and Materials Science Analytical Chemistry and Environmental Engineering Department Politehnica University of Bucharest Romania Politehnica University of Bucharest Faculty of Applied Chemistry and Material Science Bucharest Romania SC HOFIGAL S.A. Analytical Research Department Bucharest Romania

ISBN: (纸本)9786197408263

This paper reports the preparation of novel polymer membranes by phase inversion at room temperature (25 °C), using acrylonitrile, acrylic acid, dimethyl sulfoxide and small amount of medicinal plant extract. We investigated the structure of the resulting membranes through Fourier Transform Infrared (FT-IR) spectroscopy and SEM microscopy. Also was determined the water content. FTIR-ATR spectra show that the peak at 1723 cm-1 shifted to lower wave number when medicinal plant extract (1715 cm-1) is added in the polymer matrix, indicated that the medicinal plant extract was successfully incorporated into the membrane matrix. SEM image reveal that the medicinal plant extract incorporated in membrane matrix reduced the amount of fissures and cracks and were distributed relatively uniform. Water content values of the prepared membranes are relatively high probably due to the immobilization of acrylonitrile and acrylic acid in polymer matrix. The small increase of water content can be due to the small amount of medicinal plant extract incorporated into the polymer membrane. © SGEM2017 All Right Reserved.

关键词： Dimethyl sulfoxide

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Photovoltaic Devices: High Performance Roll‐to‐Roll Produced Fullerene‐Free Organic Photovoltaic Devices via Temperature‐Controlled Slot Die Coating (Adv. Funct. Mater. 6/2019)

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Advanced Functional Materials 2019年第6期29卷

作者： Seok‐In Na You‐Hyun Seo Yoon‐Chae Nah Seok‐Soon Kim Hyojung Heo Jueng‐Eun Kim Nicholas Rolston Reinhold H. Dauskardt Mei Gao Youngu Lee Doojin Vak CSIRO Manufacturing Bag 10 Clayton South Victoria 3168 Australia Professional Graduate School of Flexible and Printable Electronics and Polymer Materials Fusion Research Center Chonbuk National University Deokjin‐dong 664‐14 Jeonju‐si Jeollabuk‐do 561‐756 Republic of Korea Interdisciplinary Program in Creative Engineering School of Energy Materials and Chemical Engineering Korea University of Technology and Education Cheonan 31253 Korea Department of Nano & Chemical Engineering Kunsan National University 290–2 Miryong‐dong Gunsan‐si Jeollabuk‐do 573‐701 Republic of Korea Department of Energy Science and Engineering Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu 42988 Korea Department of Applied Physics Stanford University Stanford CA 94305 USA Department of Materials Science and Engineering Stanford University Stanford CA 94305 USA

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Highly Efficient Porous Carbon Electrocatalyst with Controllable N‐Species Content for Selective CO2Reduction

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Angewandte Chemie 2019年第8期132卷

作者： Lin Ye Yiran Ying Dengrong Sun Zhouyang Zhang Linfeng Fei Zhenhai Wen Jinli Qiao Haitao Huang Department of Applied Physics The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China Department of Chemical Engineering Pohang University of Science and Technology (POSTECH) Nam-gu Pohang-Si Gyungsangbuk-do 37673 South Korea School of Materials Science and Engineering Nanchang University Nanchang Jiangxi 330031 China Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P. R. China College of Environmental Science and Engineering State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Shanghai 201620 China

We report a straightforward strategy to design efficient N doped porous carbon (NPC) electrocatalyst that has a high concentration of easily accessible active sites for the CO 2 reduction reaction (CO 2 RR). The NPC with large amounts of active N (pyridinic and graphitic N) and highly porous structure is prepared by using an oxygen‐rich metal–organic framework (Zn‐MOF‐74) precursor. The amount of active N species can be tuned by optimizing the calcination temperature and time. Owing to the large pore sizes, the active sites are well exposed to electrolyte for CO 2 RR. The NPC exhibits superior CO 2 RR activity with a small onset potential of −0.35 V and a high faradaic efficiency (FE) of 98.4 % towards CO at −0.55 V vs. RHE, one of the highest values among NPC‐based CO 2 RR electrocatalysts. This work advances an effective and facile way towards highly active and cost‐effective alternatives to noble‐metal CO 2 RR electrocatalysts for practical applications.

关键词： CO2-Reduktion Elektrokatalyse Hierarchisch poröse Materialien Metall-organische Gerüste (MOFs) Stickstoff-dotierter Kohlenstoff

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Sensitive Mechanochromisms Based on a polymer Bilayer Structure

Sensitive Mechanochromisms Based on a Polymer Bilayer Struct...

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中国化学会2017全国高分子学术论文报告会

作者： Songshan Zeng Dianyun Zhang Wenhan Huang Zhaofeng Wang Stephan G.Freire Xiaoyuan Yu ANDrew T.Smith Emily Y.Huang Helen Nguon Luyi Sun Department of Chemical & Biomolecular Engineering and Polymer Program Institute of Materials ScienceUniversity of Connecticut Department of Mechanical Engineering University of Connecticut School of Mechanical and Electrical Engineering Heyuan Polytechnic Institute of Biomaterial College of Materials and EnergySouth China Agricultural University

We have designed a series of mechanochromic devices inspired by nature with the capabilities of changing transparency and "switching on/off" luminescence in response to mechanical stimuli. The key to accomplish these excellent optical properties is to control strain-induced surface engineering,that is,the longitudinal cracks opening and transverse invaginated folds. All of these devices are comprised of a rigid thin layer atop polydimethylsiloxane(PDMS) based elastomer,which can be facilely and quickly fabricated. For transparency change mechanochromism,the folds and cracks with excellent light trapping and scattering capabilities can endow high opaqueness to the originally highly transparent samples. The evolution of crack opening and fold–ridge mechanisms are captured through finite analysis that incorporates damage and cracks in the rigid thin layer. For luminescent mechanochromism,the strain-tunable cracks on the UV shield layer act as "gates" to mediate the traveling of UV light to "switch on/off" the luminescence of mechanochromism. This device exhibits a remarkably high strain responsive sensitivity,demonstrating an excellent sensing capability for detecting mechanical failure or damage. All the mechanochromisms also show outstanding durability and reversibility.

关键词： mechanochromism crackformation strain luminescence

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Synergistic Enhancement of Electrocatalytic Activity toward Oxygen Reduction Reaction in Alkaline Electrolytes with Pentabasic （Fe, B, N, S, P）-Doped Reduced Graphene Oxide

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Chinese Journal of Chemistry 2016年第9期34卷 878-886页

作者： Wei Chen Munil Sin Ping-Jie Wei Qian-Ling Zhang Jin-Gang Liu Department of Chemistry East China University of Science and Technology Shanghai 200237 China Shenzhen Key Laboratory of Functional Polymer College of Chemistry and Environmental Engineering Shenzhen University Shenzhen Guangdong 518060 China

As alternatives to Pt-based electrocatalysts, the development of nonprecious metal catalysts with high performance in the cathodic oxygen reduction reaction （ORR） is highly desirable for widespread use in fuel cells. Here we report a simple approach for preparing pentabasic （Fe, B, N, S, P）-doped reduced graphene oxide （rGO） via a two-step doping method of adding boric acid and ferric chloride to ternary （N, S, P）-doped rGO （NSPG）. Electro- chemical investigation of the composites for the ORR revealed that simultaneously doping appropriate amounts of Fe and B into the NSPG produced a synergistic effect that endowed the prepared catalyst with both a positively shifted ORR half-wave potential and high selectivity for the 4e^-reduction of O2. The optimized Fe2B-NSPG catalyst approached a 4e^- process for the ORR with a half-wave potential （E1/2=0.90 V vs. RHE） even 30 mV higher than that of the commercial Pt/C catalyst in alkaline solution. Furthermore, relative to the Pt/C catalyst, the Fe2B-NSPG demonstrated superior stability and excellent tolerance of the methanol cross-over effect. This simple method afforded pentabasic （Fe, B, N, S, P）-doped rGO as a promising nonpreeious metal catalyst used for alkaline fuel cells.

关键词： oxygen reduction reaction reduced graphene oxide multiple dopant electrocatalysis

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H2S Activated Drug Release from Protein Cages

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ACS applied materials & interfaces 2017年第39期9卷 33571-33575页

作者： Weijian Chen Yajie Zhang Xiao Li Hong Chen Jian Sun Fude Feng Department of Polymer Science & Engineering School of Chemistry & Chemical Engineering Nanjing University Nanjing 210023 P. R. China. Lab of Advanced Functional Materials School of Environmental Science Nanjing Xiaozhuang University Nanjing 210013 P. R. China.

We took advantage of gasotransmitter HS as a chemical reaction-based trigger for controlled release of doxorubicin which is precoordinated by copper ions and enclosed in horse spleen apoferritin. The nanocomposite is stable at physiological pH and temperature before HS activation. The drug release process avoids disassembly of protein shells and is controllable by the strong affinity of sulfide with copper ions. The in vitro cytotoxicity assay indicates the antitumor effect of doxorubicin toward tumor cells could be achievable by HS activation.

关键词： apoferritin cell imaging controlled drug delivery doxorubicin hydrogen sulfide

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Chiral Nanoparticles: Chiral Nanoparticle‐Induced Enantioselective Amplification of Molecular Optical Activity (Adv. Funct. Mater. 8/2019)

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Advanced Functional Materials 2019年第8期29卷

作者： Lin Yang Chak‐Shing Kwan Lianglin Zhang Xinghua Li Yu Han Ken Cham‐Fai Leung Yonggang Yang Zhifeng Huang Department of Physics Hong Kong Baptist University (HKBU) Kowloon Tong Kowloon Hong Kong SAR China Department of Chemistry HKBU Kowloon Tong Kowloon Hong Kong SAR China Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application Department of Polymer Science and Engineering State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China King Abdullah University of Science & Technology Physical Science and Engineering Division Thuwal 23955‐6900 Kingdom of Saudi Arabia Partner State Key Laboratory of Environmental and Biological Analysis HKBU Kowloon Tong Kowloon Hong Kong SAR China Institute of Advanced Materials HKBU Kowloon Tong Kowloon Hong Kong SAR China HKBU Institute of Research and Continuing Education 9F The Industrialization Complex of Shenzhen Virtual University Park No. 2 Yuexing 3rd Road South Zone Hi‐tech Industrial Park Nanshan District Shenzhen Guangdong 518057 China

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Atomically Dispersed Semimetallic Selenium on Porous Carbon Membrane as an Electrode for Hydrazine Fuel Cells

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Angewandte Chemie 2019年第38期131卷

作者： Tongzhou Wang Qiang Wang Yucheng Wang Yunli Da Wu Zhou Yue Shao Debao Li Sihui Zhan Jiayin Yuan Hong Wang Key Laboratory of Functional Polymer Materials (Ministry of Education) Institute of Polymer Chemistry College of Chemistry Nankai University Tianjin 300071 P. R. China State Key Laboratory of Coal Conversion Institute of Coal Chemistry The Chinese Academy of Sciences Taiyuan 030001 Shanxi P. R. China Department of Materials and Environmental Chemistry Stockholm University 10691 Stockholm Sweden School of Physical Sciences and CAS Centre for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing 100190 P. R. China Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education) College of Environmental Science and Engineering Nankai University Tianjin 300071 P. R. China

Electrochemically functional porous membranes of low cost are appealing in various electrochemical devices used in modern environmental and energy technologies. Herein we describe a scalable strategy to construct electrochemically active, hierarchically porous carbon membranes containing atomically dispersed semi‐metallic Se, denoted SeNCM. The isolated Se atoms were stabilized by carbon atoms in the form of a hexatomic ring structure, in which the Se atoms were located at the edges of graphitic domains in SeNCM. This configuration is different from that of previously reported transition/noble metal single atom catalysts. The positively charged Se, enlarged graphitic layers, robust electrochemical nature of SeNCM endow them with excellent catalytic activity that is superior to state‐of‐the‐art commercial Pt/C catalyst. It also has long‐term operational stability for hydrazine oxidation reaction in practical hydrazine fuel cell.

关键词： Atomare Dispergierung Elektrokatalyse Hydrazinoxidation Poröse Kohlenstoffmembranen Selen

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Innentitelbild: Atomically Dispersed Semimetallic Selenium on Porous Carbon Membrane as an Electrode for Hydrazine Fuel Cells (Angew. Chem. 38/2019)

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Angewandte Chemie 2019年第38期131卷

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