硅土/酚酞聚芳醚砜复合材料的制备及性能

doi:10.11944/j.issn.1000-0518.2020.05.190346

摘要/Abstract

摘要：

使用γ-氨丙基三乙氧基硅烷对硅土进行功能化改性,将功能化的硅土掺入酚酞聚芳醚砜(PES-C)中制备复合材料,并对其热学性能、力学性能及阻隔性能进行表征分析。结果表明,γ-氨丙基三乙氧基硅烷使硅土片层的层间距变大,使硅土处于半剥离状态,且通过溶液共混将表面修饰的片层硅土掺杂于PES-C中更有利于PES-C分子链的插入。所制备的复合材料的T_-5%、T_-10%和T_max分别提升了10.2、10和3.9 ℃。另外,复合材料的拉伸强度提升8.4 MPa,断裂伸长率提升2.4%,模量提升560.7 MPa。复合材料的氧气渗透系数($P_{O_{2}}$)降低77.4%。

关键词: 硅土, 酚酞聚芳醚砜, 复合材料, 热学性能, 力学性能, 气体阻隔性能

Abstract:

Functional modification of siliceous earth with γ-aminopropyltriethoxysilane, and functionalized siliceous earth was blended into phenolphthalein-based poly(arylene ether sulfone) (PES-C) to prepare composite materials. And its thermal properties, mechanical properties and barrier properties were characterized and analyzed. The results showed that the surface modification of γ-aminopropyltriethoxy increased the layers' pacing of siliceous earth and made the siliceous earth in the state of semi-stripping, and the doping of the surface modified siliceous earth into PES-C through solution blending was more conducive to the insertion of PES-C molecular chains. The 5% mass loss temperature (T_-5%), the T_-10% and the T_max of the composites was increased by 10.2 ℃, 10 ℃ and 3.9 ℃, respectively. In addition, the tensile strength of the composite materials increased by 8.4 MPa, the breaking elongation increased by 2.4%, and the modulus increased by 560.7 MPa. The $P_{O_{2}}$ of composites was reduced by 77.4%.

Key words: siliceous earth, phenolphthalein-based poly(arylene ether sulfone), composites, thermal properties, mechanical properties, gas barrier properties

高丽敏, 李璐, 周光远, 王红华, 朱忠丽. 硅土/酚酞聚芳醚砜复合材料的制备及性能[J]. 应用化学, 2020, 37(5): 524-530.

GAO Limin, LI Lu, ZHOU Guangyuan, WANG Honghua, ZHU Zhongli. Preparation and Properties of Siliceous Earth/ Phenolphthalein-Based Poly(arylene ether sulfone) Composites[J]. Chinese Journal of Applied Chemistry, 2020, 37(5): 524-530.

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