PTFE乳液制备PTFE／ZrO2微孔膜及性能研究

摘要

This paper used polytetrafluoroethylene （PTFE） emulsion as a matrix phase, micronanozirconium dioxide （ZrO2） powder as a reinforcer to prepare PTFE/ZrO2 composite membranes via mechanical stretch, and the tensile strength of the membranes was tested. Single-factor method was used to analyze the effect of ZrO2 powder content, draw ratio, heat-treatment temperature, and heat-treatment time on the tensile strength of the composite membrane. PTFE/ZrO2 membranes were post treated by low-temperature plasma to study the effect of the plasma treatment time and ZrO2 power on the hydrophility of the membranes. It showed that the tensile strength of PTFE/ZrOe composite membranes increased with increasing ZrO2 content, but decreased with increasing of draw ratio. When heat-treatment temperature was 310 ℃, heattreatment time was 10 min, the tensile strength gave rise to a maximum. The best post treated time of low-temperature plasma was 30 s.%尝试以聚四氟乙烯（PTFE）乳液为原料制备PTFE微孔膜，选定化学稳定性、热稳定性优异的纳米二氧化锆（ZrO2）作为增强剂以提高微孔膜强度，采用电子万能力学试验机测试了样品的力学强度，用单因素法讨论了纳米ZrO2含量、拉伸比例、热处理温度和热处理时间对微孔膜拉伸强度的影响；同时采用低温等离子体处理PTFE／ZrO2复合微孔膜以改善其表面亲水性。结果表明，PTFE／ZrO2复合微孔膜的拉伸强度与纳米ZrO2含量成正比，与拉伸倍数成反比；其拉伸强度随着热处理温度的升高或热处理时间的延长，呈先增大后减小的变化趋