报告主题：Alkyl-π Functional Molecular Liquids towards Sensor and Actuator Applications
报告嘉宾：中西尚志（教授，日本国家物质材料研究所）
时 间：2023年5月16日（周二）上午10:00
地 点：材料学院536会议厅
报告人简介
中西尚志教授（Dr. Takashi Nakanishi），日本国家物质材料研究所（NIMS）资深研究员，Group Leader,北海道大学教授，波兰华沙理工大学兼职教授。2010年荣获日本国家物质科学研究所（NIMS）所长奖，2012年荣获日本文部省文部科学大臣“杰出青年”称号。Nakanishi教授主要研究领域为软物质科学与超分子自组装。近年来在国际主流刊物包括Nature Chemistry, Nature Communications, Advanced Materials, Angew. Chem. Int. Ed. , J. Am. Chem. Soc.等发表学术论文160余篇，拥有专利26项。也是Nature, Science, Nature Chemistry, Nature Materials等期刊杂志的审稿人。
报告内容简介
Abstract:Energy harvesting systems thathave lightweight, good flexibility, wearresistance, as well as largeanddurableoutputpowergeneration,couldbeanidealwearablesoftelectronicdeviceapplicableforhealthcare equipment. Towards these demands, organic/polymericsoft “electrets”, which possessthe flexibility and maintain trapped charges in the materials, can be the potential materials[1]. Recently wehavedevelopednovel“liquidelectrets”basedonanalkylatedporphyrinliquid[2] oralkylatedπ-conjugatedpolymer fluids[3]withpolingtreatment. Ofcourse, liquidsubstances are capable offlowinganddeformingfreely; thus, theyareof special interest to befabricatedintoflexibledevices[4].Moreimportantly,webelieve thatbulkyyet flexible branched alkyl chains attached to π-conjugatedmolecularorpolymerunitscouldshieldthosecharge-trappingactivesitesandstablyholdinjectedcharges.
Herewepresent liquid electret devices that exhibit mechanoelectrical and electroacoustic functions,as well as stretchability,based on charged liquidporphyrin[2](Fig.1a). We alsopresent ourvery recentdevelopment ofmechanoelectric generators (MEGs)using alkylatedπ-conjugatedpolymer electrets[3],inparticular,focusingonadjustingtheelasticmodulusoftheelectrettoachievehighstretchabilityof the assembled MEGs by a miscible blending oftwo alkylated π-conjugated polymers[5] (Fig.1b).
Fig.1.(a)A3Dmodelchemicalstructureofalkylatedporphyrinliquid,itsphysicalappearance,stretchableelectrodeanditsmechanoelectricperformance.(b)Chemical structureofalkylatedconjugatedpolymers(P1andP2),photos forablend filmofB1(=P1+P2)anditsstretchabilityupto300%,aswellasitsMEGresultswhereB1waspoledpositivelyornegatively.
References:
1) Z. Guo, Y. Patil, A. Shinohara, K. Nagura, M. Yoshida,T. Nakanishi,Mol. Syst. Des. Eng.,2022,7,537.
2) A. Ghosh, M. Yoshida, K. Suemori, H. Isago, N. Kobayashi, Y. Mizutani, Y. Kurashige, I. Kawamura, M. Nirei, O.Yamamuro, T. Takaya, K. Iwata, A.Saeki, K. Nagura, S. Ishihara, T.Nakanishi,NatureCommun.,2019,10, 4210.
3) A.Shinohara, M. Yoshida, C. Pan, T. Nakanishi,Polym. J.,2023, 55,529.
4) T. Machida, T. Nakanishi,J. Mater.Chem.C,2021,9,10661.
5) Z. Guo, A. Shinohara, C. Pan, F. J. Stadler, Z. Liu, Z.-C.Yan, J. Zhao, L. Wang,T. Nakanishi,Mater. Horiz.,2020,7,1421.
