聚乙烯导热复合材料的电子束辐照改性  

Electron Beam Radiation Modification of Polyethylene Thermal Conductive Composites

作　　者：段金炽 戚云霞 石埕莹 赵麒[1] 刘佰军[3] 孙昭艳[4] 徐义全 呼微[1] 张袅娜[1] DUAN Jinchi;QI Yunxia;SHI Chengying;ZHAO Qi;LIU Baijun;SUN Zhaoyan;XU Yiquan;HU Wei;ZHANG Niaona(Changchun University of Technology,Changchun 130012,China;Changchun Kinwa High Technology Co.Ltd,Changchun 130000,China;Jilin University,Changchun 130012,China;State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)

机构地区：[1]长春工业大学化学工程学院,长春130012 [2]中科英华长春高技术有限公司,长春130000 [3]吉林大学化学学院,长春130012 [4]中国科学院长春应用化学研究所,高分子物理与化学国家重点实验室,长春130022

出　　处：《应用化学》2020年第8期896-903,共8页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金资助项目(21404013,5187306);吉林省科技厅重点研发项目(20200401036GX);吉林省教育厅“十三五”科学技术项目(JJKH20191297KJ);长春新区“长白慧谷”英才计划人才项目(9-2020004)。

摘　　要：将低密度聚乙烯(LDPE)、氧化铝(Al2O3)和纳米二氧化硅(SiO2)进行熔融共混,再通过电子束辐照对得到的材料进行改性,得到了同时具有高导热性能和力学性能的复合材料(PE-Al-Si)。当纳米SiO2的质量分数为1%,电子束辐照剂量为120 kGy时,与不含SiO2的复合材料(PE-Al)相比,PE-Al-Si的导热系数达到了0.759 W/(m·K),提高了22%。另外,PE-Al-Si的拉伸强度比PE-Al提高了17%。证明SiO2不仅可以改善复合材料的力学性能,同时还提高了辐照效率及复合材料的导热性能。In this study, the composites(PE-Al-Si) with high thermal conductivity and mechanical properties were obtained by compounding low density polyethylene(LDPE), alumina(Al2O3) and SiO2 nanoparticles through melt blending, and then further modification through electron beam radiation. When the mass fraction of SiO2 nanoparticles is 1% and the electron beam radiation(EB) dose is 120 kGy, the thermal conductivity of PE-Al-Si increases from 0.624 W/(m·K) to 0.759 W/(m·K), which is 22% increase compared with the composites without SiO2(PE-Al). The tensile strength of PE-Al-Si is increased by 17% compared with that of PE-Al. The results prove that SiO2 improves the mechanical properties, the radiation efficiency and the thermal conductivity of the composites.

关 键 词：聚乙烯 电子束辐照 纳米二氧化硅 导热 

分 类 号：O632[理学—高分子化学]