Preparation and Characterization of Aminosiloxane Cross-Linked Polyimide/SiO2 Composite Porous Film

被引：0

作者：

Ding C. ^{[1
]}

Li R. ^{[1
]}

Yu J. ^{[1
]}

Wang X. ^{[1
]}

Huang P. ^{[1
]}

机构：

[1] College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing

来源：

Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2020年 / 36卷 / 08期

关键词：

Amino siloxane; Mechanical performance; Polyimide; Silica; Sol-gel; Thermal conductivity;

D O I：

10.16865/j.cnki.1000-7555.2020.0196

中图分类号：

学科分类号：

摘要：

Polyimide/silica (PI/SiO2) composite porous films with lower thermal conductivity were prepared by sol-gel method with PI as matrix, TEOS as SiO2 precursor and APTES as crosslinking agent. The effects of SiO2 addition on the structure and performance of the porous films were tested by XRD, FT-IR, SEM, thermal gravimetric analyzer (TGA), thermal conductivity tester and electronic universal tensile tester. The results show that the PI/SiO2 composite porous films have lower thermal conductivity and better mechanical strength, and the crosslinking agent and SiO2 content have a greater impact on the thermal and mechanical properties of the materials. The cross-linking agent amino-siloxane improves the bonding between SiO2 and PI matrix and the mechanical strength of the materials. The thermal conductivity of the materials gradually decreases with the increase of SiO2 content, and the tensile strength and elastic modulus are not lower than PI matrix. When the SiO2 content is 30%, the elastic modulus is 214.3 MPa, and the thermal conductivity is 0.043 W/ (m•K). © 2020, Editorial Board of Polymer Materials Science & Engineering. All right reserved.

引用

页码：67 / 73

页数：6

共 12 条

[1] Ahmed S, Li M, Cai Y B, Et al., sulfonated multi-walled carbon nanotubes filled chitosan composite membrane for fuel-cell applications, Journal of Applied Polymer Science, 136, (2019)
[2] Li H R, Fan J, Guan X Y., Preparation and properties of polyimide/SiO2 hybrid membranes containing coupling agents, Polymer Materials Science & Engineering, 25, 3, pp. 127-129, (2009)
[3] Rashidi V, Coyle E J, Sebeck K, Et al., Thermal conductance in cross-linked polymers: effects of non-bonding interactions, Journal of Physical Chemistry B, 121, pp. 4600-4609, (2017)
[4] Zhou H, Zhang S, Yang M., Modeling the thermal conductivity of exfoliated polymer/clay nanocomposites, Journal of Applied Physics, 102, (2007)
[5] Zhou W Y, Zhang Y T., Progress in intrinsic thermal conductive polymers, China Synthetic Resin and Plastics, 27, 2, pp. 69-73, (2010)
[6] Ma H, Tian Z., Effects of polymer chain confinement on thermal conductivity of ultrathin amorphous polystyrene films, Applied Physics Letters, 107, (2015)
[7] Fei Z F, Yang Z C, Chen G B, Et al., Preparation and characterization of glass fiber/polyimide/SiO2 composite aerogels with high specific surface area, Journal of Materials Science, 53, pp. 12885-12893, (2018)
[8] Liu J Y, Huang P., The effect of sparkling technology on polyimide foam structure, New Chemical Materials, 36, 2, pp. 47-49, (2008)
[9] Fei Z F, Yang Z C, Chen G B, Et al., Preparation of tetraethoxysilane-based silica aerogels with polyimide cross-linking from 3, 3', 4, 4'-biphenyltetracarboxylic dianhydride and 4, 4'-oxydianiline, Journal of Sol-Gel Science and Technology, 85, pp. 506-514, (2018)
[10] Deng C, Peng L Y, Qin J Q, Et al., Preparation of porous polyimide/SiO2 composite microspheres with mesoporous structure by sol-gel method, Polymer Materials Science & Engineering, 33, 7, pp. 126-130, (2017)

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