Thermally conductive polyvinyl alcohol composite films via introducing hetero-structured MXene@silver fillers

作     者：Mukun Li Yuyao Sun Dianying Feng Kunpeng Ruan Xia Liu Junwei Gu Mukun Li;Yuyao Sun;Dianying Feng;Kunpeng Ruan;Xia Liu;Junwei Gu

作者机构：Queen Mary University of London Engineering SchoolNorthwestern Polytechnical UniversityXi’an 710072China Shaanxi Key Laboratory of Macromolecular Science and TechnologySchool of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Shandong Nonmetallic Materials InstituteJinan 250031China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第5期

页      面：7820-7828页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(Nos.U21A2093 and 51973173) the Technological Base Scientific Research Projects(Highly Thermally Conductive Nonmetal Materials) the Fundamental Research Funds for the Central Universities,the Undergraduate Innovation&Business Program in Northwestern Polytechnical University(Nos.S202210699381 and S202210699172) the Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University(No.CX2022073) 

主　　题：hetero-structured MXene@Ag fillers polyvinyl alcohol composite films thermal conductivity electromagnetic interference shielding 

摘      要：Ag nanoparticles were in-situ grown on the surface of MXene nanosheets to prepare thermally conductive hetero-structured MXene@Ag *** polyvinyl alcohol(PVA)as the polymer matrix,thermally conductive MXene@Ag/PVA composite films were fabricated by the processes of solution blending,pouring,evaporative *** the same mass fraction,MXene@Ag-III(MXene/Ag,2:1,w/w)presents more significant improvement in thermal conductivity coefficient(λ)than MXene@Ag,single MXene,Ag,simply blending MXene/***@Ag-III/PVA composite films show dual functions of excellent thermal conductivity and electromagnetic interference(EMI)*** the mass fraction of MXene@Ag-III is 60 wt.%,the in-planeλ(λ_(∥)),through-planeλ(λ_(⊥)),EMI shielding effectiveness(EMI SE)are 3.72 and 0.41 W/(m∙K),32 dB,which are increased by 3.1,1.3,105.7 times than those of pure PVA film(0.91 and 0.18 W/(m∙K),0.3 dB),*** 60 wt.%MXene@Ag-III/PVA composite film also has satisfying mechanical and thermal properties,with Young’s modulus,glass transition temperature,heat resistance index of 3.8 GPa,58.5 and 175.3℃,respectively.