Preparation and mechanical properties of SiO2/polytetrafluoroethylene composite films

被引：0

作者：

Zhang Y. ^{[1
]}

Chen R. ^{[1
]}

Guo S. ^{[1
]}

机构：

[1] State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2019年 / 36卷 / 03期

关键词：

Dispersal uniformity; Mechanical properties; Polytetrafluoroethylene; SiO[!sub]2[!/sub; Skiving films;

D O I：

10.13801/j.cnki.fhclxb.20180911.003

中图分类号：

学科分类号：

摘要：

The SiO2/polytetrafluoroethylene (PTFE) composite films with 35wt% SiO2 and the thickness of 50 μm were prepared by air-assisted dry blending, cold-pressing, sintering and skiving techniques. The effects of SiO2 particle size on the pinhole defects and mechanical properties for SiO2/PTFE composite films were investigated, and the influence of the dispersion of SiO2 in PTFE and the intermolecular interaction on the mechanism of its performance was also studied. The results show that with the increasing of SiO2 particle size, the dispersion throughout the PTFE matrix tends to be uniform, and PTFE can coat the particles better. The pinhole defects of the SiO2/PTFE composite films are reduced and the mechanical properties are improved. When the particle size (D50) of SiO2 is 12 μm, the distribution in the PTFE matrix is most uniform, the pinhole defects are least, and the PTFE/SiO2 composite film exhibits optimum mechanical properties. The elongation at break is 19.5%, and the tensile strength is 9.2 MPa. © 2019, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.

引用

页码：624 / 629

页数：5

共 21 条

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