超细玻纤的长度分布调控及其PTFE基复合材料力学性能

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (8): 107-112.

超细玻纤的长度分布调控及其PTFE基复合材料力学性能

王军山, 金霞, 贾倩倩, 刘正^*

中国电子科技集团公司第四十六研究所,天津300220

收稿日期:2020-03-30 出版日期:2020-08-28 发布日期:2020-08-28
通讯作者: 刘正(1994-),男,学士,助理工程师,主要从事PTFE基复合材料方面的研究,317920524@qq.com。
作者简介:王军山(1984-),男,学士,工程师,主要从事树脂基复合材料方面的研究。

LENGTH CONTROL OF ULTRA-THIN GLASS FIBER AND THEIR MECHANICAL PROPERTIES OF PTFE BASED COMPOSITE MATERIALS

WANG Jun-shan, JIN Xia, JIA Qian-qian, LIU Zheng^*

The 46th Research Institute of China Electronics Technology Group Corporation, Tianjin 300220, China

Received:2020-03-30 Online:2020-08-28 Published:2020-08-28

摘要/Abstract

摘要： 为了提高聚四氟乙烯(PTFE)基复合材料的力学性能,须在树脂基体中添加玻璃纤维作为增强材料。本文以超细玻璃纤维棉为研究对象,采用一种低速磨碎设备,通过调节设备的转速和磨碎的时间,调控棉状纤维的长度分布,采用鲍尔筛分仪表征纤维的长度分布,并与PTFE和陶瓷粉混合,制成短玻纤增强材料随机填充的PTFE基超薄复合片材。实验结果表明,以70 rpm、10 s的低速磨碎工艺条件制备的短玻纤长度分布适中,满足制备PTFE基复合材料的条件,在50目、100目、200目和400目筛网截留玻纤的质量分数分别为15.3wt%、20.8wt%、19.5wt%和14.6wt%,配置的纤维水浆料分散均匀无团聚体,制备的PTFE基复合材料的拉伸强度、拉伸模量和压缩模量分别提升至15.4 MPa、762 MPa和1232 MPa。

关键词: 玻璃纤维, 玻纤长度, PTFE复合材料, 力学性能

Abstract: In order to improve the mechanical properties of PTFE based composites, glass fiber must be added to the dielectric layer as the reinforcing material. In this paper, ultra-fine glass fiber cotton was taken as the research object. A kind of low-speed grinding equipment is adopted. By adjusting the speed and grinding time of the equipment, the length of glass fiber was controlled. The length information of the fiber was characterized by Bauer-Mcnett fiber classifier. Then the fibers were mixed with PTFE and ceramic powders to prepare PTFE based composite as randomly filling reinforcing material. The composite ultra-thin layers were made. The experimental results showed that the length distribution of the short glass fiber prepared under the grinding speed of 70 rpm and grinding time of 10 s was moderate, which met the requirement of PTFE matrix composite material preparation. The mass fraction of trapped glass fibers in 50 mesh, 100 mesh, 200 mesh and 400 mesh screens was 15.3wt%, 20.8wt%, 19.5wt% and 14.6wt%, respectively. The fiber slurry was evenly dispersed without aggregation, and the tensile strength, tensile module and compression module of the prepared PTFE based composite were increased to 15.4 MPa, 762 MPa, and 1232 MPa, respectively.

Key words: glass fiber, fiber length, PTFE composite material, mechanical property

中图分类号:

TB332

王军山, 金霞, 贾倩倩, 刘正. 超细玻纤的长度分布调控及其PTFE基复合材料力学性能[J]. 复合材料科学与工程, 2020, 0(8): 107-112.

WANG Jun-shan, JIN Xia, JIA Qian-qian, LIU Zheng. LENGTH CONTROL OF ULTRA-THIN GLASS FIBER AND THEIR MECHANICAL PROPERTIES OF PTFE BASED COMPOSITE MATERIALS[J]. Composites Science and Engineering, 2020, 0(8): 107-112.

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