可持续液态金属诱导的导电贝壳  

Sustainable liquid metal-induced conductive nacre

作　　者：严佳 周天柱 彭景淞 王华高 江雷 程群峰 Jia Yan;Tianzhu Zhou;Jingsong Peng;Huagao Wang;Lei Jiang;Qunfeng Cheng(School of Chemistry,Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education,Beihang University,Beijing 100191,China;School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China;Suzhou Institute for Advanced Research,University of Science and Technology of China,Suzhou 215123,China;Key Laboratory of Bio-inspired Materials and Interfacial Science,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;Institute of Energy Materials Science(IEMS),University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]School of Chemistry,Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education,Beihang University,Beijing 100191,China [2]School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China [3]Suzhou Institute for Advanced Research,University of Science and Technology of China,Suzhou 215123,China [4]Key Laboratory of Bio-inspired Materials and Interfacial Science,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China [5]Institute of Energy Materials Science(IEMS),University of Shanghai for Science and Technology,Shanghai 200093,China

出　　处：《Science Bulletin》2024年第7期913-921,共9页科学通报（英文版）

基　　金：supported by the National Key Research and Development Program of China(2021YFA0715700);the National Natural Science Foundation of China(22075009 and 52350012);National Science Fund for Distinguished Young Scholars(52125302);111 Project(B14009)。

摘　　要：Nacre has inspired research to fabricate tough bulk composites for practical applications using inorganic nanomaterials as building blocks.However,with the considerable pressure to reduce global carbon emissions,preparing nacre-inspired composites remains a significant challenge using more economical and environmentally friendly building blocks.Here we demonstrate tough and conductive nacre by assembling aragonite platelets exfoliated from natural nacre,with liquid metal and sodium alginate used as the “mortar”.The formation of Ga-O-C coordination bonding between the gallium ions and sodium alginate molecules reduces the voids and improves compactness.The resultant conductive nacre exhibits much higher mechanical properties than natural nacre.It also shows excellent impact resistance attributed to the synergistic strengthening and toughening fracture mechanisms induced by liquid metal and sodium alginate.Furthermore,our conductive nacre exhibits exceptional self-monitoring sensitivity for maintaining structural integrity.The proposed strategy provides a novel avenue for turning natural nacre into a valuable green composite.

关 键 词：Aragonite platelet Liquid metal Mechanical properties SELF-MONITORING SUSTAINABLE 

分 类 号：TB33[一般工业技术—材料科学与工程]