摘要
将不同ζ电位的水溶性硅溶胶与乙烯-醋酸乙烯酯共聚物（EVA）的四氢呋喃溶液共混,蒸出水和溶剂制得母料,母料与低密度聚乙烯（LDPE）密炼,制备出SiOx/LDPE纳米材料。研究了硅溶胶的ζ电位对SiOx在LDPE纳米材料中粒径和分散性的影响,进而研究对纳米材料力学性能和电学性能的影响。结果发现,硅溶胶的稳定性与SiOx/LDPE纳米材料的性能密切相关,硅溶胶的ζ电位越大,SiOx在纳米材料中的粒径越小,分散越均匀,纳米复合材料的力学性能越高,空间电荷的抑制效果越明显,当ζ电位为-16.80 mV时,SiOx粒径小于100 nm,复合材料的弹性模量为53.73 MPa,断裂伸长率为972.41%,拉伸强度为10.13 MPa,断裂功为12.48 J/m2,电荷的注入量降低为2.5 C/m3-3.0 C/m3。
ABSTRACT： Aqueous-soluble sol with different ζ potentials was blended with ethylene vinyl acetate （EVA） in tetrahydrofuran to get masterbatch with water and solvent distilled, and then SiOx/LDPE nanomaterials were obtained by mixing LDPE with masterbatch. The effects of ζ potential of silica-sol on the size and dispersion were studied, and then mechanical and electrical properties of SiOx/LDPE nanomaterials were researched. The result shows the stability of silica-sol is closely related to the properties of SiOx/LDPE nanomaterials. Namely, as silica sol potential is larger, the particle size of SiOx nanomaterials is smaller and the dispersion is more uniform. The mechanical properties of nanocomposites is better, the inhibition effect of space charge is more obvious as well, When the zeta potendal is -16.80 mV, SiOx particle size is less than 100 nm, elastic modulus volume of 53.73 MPa, elongation at break of 972.41% , tensile strength of 10.13 MPa,work of fracture of 12.48 J/m2, charge injection of 2.5 C/m3-3.0 C/m3 for the composi＇tes.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第7期80-84,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(50977019)
