Functionalized Aluminum Nitride for Improving Hydrolysis Resistances of Highly Thermally Conductive Polysiloxane Composites  

作　　者：Mukun He Lei Zhang Kunpeng Ruan Junliang Zhang Haitian Zhang Peng Lv Yongqiang Guo Xuetao Shi Hua Guo Jie Kong Junwei Gu 

机构地区：[1]Shaanxi Key Laboratory of Macromolecular Science and Technology,School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi’an 710072,Shaanxi,People’s Republic of China [2]Chongqing Innovation Center,Northwestern Polytechnical University,Chongqing 401135,People’s Republic of China [3]School of Materials Science and Engineering,Shandong University of Technology,Zibo 255000,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第6期198-211,共14页纳微快报(英文版)

基　　金：support from the National Natural Science Foundation of China(52473083 and 52403112);the Technological Base Scientific Research Projects(Highly Thermal conductivity Nonmetal Materials),the Natural Science Basic Research Program of Shaanxi(2024JC-TBZC-04);the Shaanxi Province Key Research and Development Plan Project(2023-YBGY-461);the Innovation Capability Support Program of Shaanxi(2024RS-CXTD-57),the Natural Science Foundation of Chongqing,China(2023NSCQ-MSX2547);the Fundamental Research Funds for the Central Universities(D5000240077 and D5000240067);the Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University(CX2024094);the Analytical&Testing Center of Northwestern Polytechnical University for FT-IR,XRD and TEM tests performed in this work.

摘　　要：A series of divinylphenyl-acryloyl chloride copolymers(PDVB-co-PACl)is synthesized via atom transfer radical polymerization employing tert-butyl acrylate and divinylbenzene as monomers.PDVB-co-PACl is utilized to graft on the surface of spherical aluminum nitride(AlN)to prepare functionalized AlN(AlN@PDVB-co-PACl).Polymethylhydrosiloxane(PMHS)is then used as the matrix to prepare thermally conductive AlN@PDVB-co-PACl/PMHS composites with AlN@PDVB-co-PACl as fillers through blending and curing.The grafting of PDVB-co-PACl synchronously enhances the hydrolysis resistance of AlN and its interfacial compatibility with PMHS matrix.When the molecular weight of PDVB-co-PACl is 5100 g mol^(-1)and the grafting density is 0.8 wt%,the composites containing 75 wt%of AlN@PDVB-co-PACl exhibit the optimal comprehensive performance.The thermal conductivity(λ)of the composite is 1.14 W m^(-1)K^(-1),which enhances by 20%and 420%compared to theλof simply physically blended AlN/PMHS composite and pure PMHS,respectively.Meanwhile,AlN@PDVB-co-PACl/PMHS composites display remarkable hydrothermal aging resistance by retaining 99.1%of itsλafter soaking in 90°C deionized water for 80 h,whereas theλof the blended AlN/PMHS composites decreases sharply to 93.7%.

关 键 词：POLYMETHYLHYDROSILOXANE Aluminum nitride COPOLYMER Thermally conductive composites 

分 类 号：TB3[一般工业技术—材料科学与工程]