中国电机工程学报2016，Vol.36Issue(24)：6619-6626,8.DOI:10.13334/j.0258-8013.pcsee.161814
纳米氧化镁颗粒对聚丙烯的性能调控
Effect of Magnesium Oxide Nanoparticles on Tailoring the Properties of Polypropylene
摘要
Abstract
Recently, polypropylene (PP) is considered as the potential recyclable HVDC cable insulation material. MgO nanoparticles were introduced into PP to tailor the properties of PP so as to make it more capable for HVDC cable insulation application. We focused on the micro morphology and structure, thermal properties, space charge accumulation and DC electric breakdown strength of the MgO/PP nanocomposites as well as the effect of MgO nanoparticles on these properties of PP. The mechanism of space charge suppression and breakdown strength enhancement in MgO/PP nanocomposites was explained by measuring the depth and density of the charge traps. The results indicate that the introduction of MgO nanoparticles has little effect on the crystallinity, crystal structure and melting temperature of PP and the good thermal properties of PP remain in MgO/PP nanocomposites. Inclusion of MgO nanoparticles obviously suppresses homocharge injection and reduces space charge accumulation. MgO/PP nanocomposite with 3 phr MgO nanoparticles exhibits the highest DC breakdown strength, which is 29.3 % higher than that of pure PP. The results of thermally stimulated current show that deep traps increase in MgO/PP nanocomposites, which would suppress charge injection and decrease charge carrier mobility. The effect of MgO nanoparticles on the properties of PP is established, which provides a reference for the design and development of recyclable HVDC cable insulation material.关键词
纳米氧化镁/聚丙烯/结晶结构/热性能/直流击穿强度/空间电荷/直流电缆Key words
magnesium oxide nanoparticles/polyprop- ylene/crystal structure/thermal properties/DC breakdown strength/space charge/DC cable分类
信息技术与安全科学引用本文复制引用
周垚,党斌,胡军,陈新,于凡,何金良..纳米氧化镁颗粒对聚丙烯的性能调控[J].中国电机工程学报,2016,36(24):6619-6626,8.基金项目
国家重点基础研究发展计划项目(973计划)(2014CB239505)；国家电网公司科技项目(SGTJDK00PJJS1600017)． Project Supported by the National Basic Research Program (973 Program)(2014CB239505) （973计划）
Science and Technology Projects of Sate Grid Corporation (SGTJDK00PJJS1600017) （SGTJDK00PJJS1600017）
