SiO_(2)纳米粒子增强PVC电缆材料性能研究  

Study on the Properties of SiO_(2) Nanoparticles Reinforced PVC Cable Materials

作　　者：张国平 祝文军 ZHANG Guo-ping;ZHU Wen-jun(Qinghai Shanmei New Energy Technology Co.,Ltd.,Xining 810000,China)

机构地区：[1]青海陕煤新能源科技有限公司,青海西宁810000

出　　处：《塑料科技》2024年第8期102-104,共3页Plastics Science and Technology

摘　　要：通过氨基硅烷偶联剂(GAS)对二氧化硅(SiO_(2))纳米颗粒进行改性,使用改性的SiO_(2)纳米颗粒增强聚氯乙烯(PVC)纳米复合材料的介电性能和力学性能,且研究改性SiO_(2)纳米颗粒掺量对其性能的影响。结果表明:随着改性SiO_(2)添加量的增加,PVC复合材料的相对介电常数呈现先降低后升高的趋势,且在添加量为1.5%时达到最低,为2.97,相较于纯PVC材料的相对介电常数降低了26.12%;而PVC复合材料在直流和支流电场下的击穿强度均呈现先上升后下降的趋势,其中均在添加量为1.0%时达到最高,在直流和支流电场条件下的击穿强度分别为70.21、60.12 kV/mm,且较纯PVC材料的击穿强度分别增加了20.48%、30.36%。此外,在1.0%添加量下,PVC复合材料的拉伸强度、弯曲强度及断裂伸长率分别为49.33 MPa、92.67 MPa和187.34%。Silicon dioxide(SiO_(2))nanoparticles were modified using aminosilane coupling agents(GAS),and the modified SiO_(2) nanoparticles were used to enhance the dielectric and mechanical properties of PVC nanocomposites.The effects of the addition of modified SiO_(2) nanoparticles on them were studied.The results showed that with the increase of modified SiO_(2),the relative dielectric constant of PVC composites shows a trend of first decreasing and then increasing,and reaches the lowest value of 2.97 at 1.5%addition,which is 26.12%lower than that of pure PVC materials.The breakdown strength of PVC composites shows a trend of first increasing and then decreasing under both direct current and branch electric fields,with the highest breakdown strength reached at a addition of 1.0%.The breakdown strength under direct current and branch electric field conditions is 70.21,60.12 kV/mm,respectively,and the breakdown strength of pure PVC materials has increased by 20.48%and 30.36%,respectively.In addition,at a addtion of 1.0%,the tensile strength,flexural strength and elongation at break of PVC composites are 49.33 MPa,92.67 MPa and 187.34%,respectively.

关 键 词：二氧化硅 氨基硅烷偶联剂 聚氯乙烯 介电性能 力学性能 

分 类 号：TB33[一般工业技术—材料科学与工程] TQ325.3[化学工程—合成树脂塑料工业]