新材料与新技术

交联剂对聚酰亚胺/SiO2复合多孔膜结构和性能的影响

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  • 南京工业大学化工学院材料化学工程国家重点实验室,南京211800
丁成成(1993-),女,硕士,主要从事聚酰亚胺多孔膜结构与性能研究。

网络出版日期: 2020-10-20

Influence of crosslinking agent on the structure and property of PI/SiO2 composite porous film

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  • State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 211800

Online published: 2020-10-20

摘要

以正硅酸乙酯(TEOS)为硅源,4,4′-二氨基二苯醚(ODA)为二胺单体,均苯四甲酸二酐(PMDA)为二酐单体,γ-氨丙基三乙氧基硅烷(APTES)为交联剂,采用溶胶-凝胶法结合相转化法制备聚酰亚胺/二氧化硅(PI/SiO2)复合多孔膜。探究了交联剂种类及加入比例对多孔膜结构和性能的影响,通过红外光谱、扫描电镜、导热系数测试仪及万能拉伸试验机对多孔膜进行性能表征。结果表明,多孔膜亚胺化完全,交联剂对PI基体的导热性能与力学性能有明显影响。交联剂APTES制备的复合多孔膜拉伸强度和弹性模量均比其他两种交联剂好,导热系数最低至0.043W/(m·K);随着APTES加入比例的增加,多孔膜拉伸强度由19.8MPa增大至21.2MPa,弹性模量由155.4MPa增大至207.6MPa。

本文引用格式

丁成成, 俞娟, 王晓东, 黄培 . 交联剂对聚酰亚胺/SiO2复合多孔膜结构和性能的影响[J]. 化工新型材料, 2020 , 48(10) : 87 -91 . DOI: 10.19817/j.cnki.issn 1006-3536.2020.10.019

Abstract

Polyimide/silica (PI/SiO2) composite porous film was prepared by sol-gel method and phase conversion method,using ethyl orthosilicate (TEOS) as silicon source,4,4′ amino diphenyl ether (ODA) as diamine monomer,PMDA as dihydride monomer,and γ-aminopropyltriethoxysilane (APTES) as crosslinking agent.The porous films were characterized by FT-IR,SEM,thermal conductivity tester and universal tensile testing machine.The results shown that the porous film imidization was completely,and the crosslinking agent had obvious influence on the thermal conductivity and mechanical property of PI matrix.The tensile strength and elastic modulus of the porous films with the thermal conductivity of 0.043W/(m· K) prepared by APTES were better than others.With the increase of APTES,the tensile strength of porous film increased from 19.8MPa to 21.2MPa,and the elastic modulus increased from 155.4MPa to 207.6MPa.

参考文献

[1] 葛胜涛, 邓先功, 毕玉保, 等.多级孔材料研究进展[J].材料导报, 2018, 32(13):22-1-2213.
[2] 丁孟贤, 何天白.聚酰亚胺新型材料[M].北京:科学出版社, 1998.
[3] 刘俊英, 黄培.发泡工艺条件对聚酰亚胺泡沫结构的影响[J].化工新型材料, 2008, 36(2):47-49.
[4] 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[J].Journal of Materials Science, 2018, 53:12885-12893.
[5] Dong J, Zhou W C, Jia H Y, et al.Mechanical, dielectric and microwave absorption properties of SiO2f/SiCf/PI composites[J].Mater Res Express, 2018, 5:125302.
[6] Ahmed S, Ali M, Cai Y B, et al.Sulfonated multi-walled carbon nanotubes filled chitosan composite membrane for fuel-cell applications[J].Journal of Applied Polymer Science, 2019, 136(22):47603.
[7] Wang M R, Xing R S, Wu H, et al.Nanocomposite membranes based on alginate matrix and high loading of pegylated POSS for pervaporation dehydration[J].Journal of Membrane Science, 2017, 538, 86-95.
[8] 丁琳, 杨建军, 吴庆云, 等.氨基硅氧烷改性水性聚氨酯自消光树脂的制备及性能[J].高分子材料科学与工程, 2019, 35(1):23-28.
[9] Zhou J T, Liu F F, Dai X M, et al.Surface modification of high-performance polyimide fibers by using a silane coupling agent[J].Composite Interfaces, 201826(8):687-698.
[10] Li Y, Yang L, Hu D, et al.The effect of coupling agents on the interfacial properties of wood-fiber-reinforced polyimide composites[J].Surface and Interface Analysis, 2017, 49(12):1232-1237.
[11] 徐佳, 董杰, 赵昕, 等.溶胶-凝胶法制备聚酰亚胺/SiO2杂化薄膜及性能研究[J].化工新型材料, 2019, 3:71-75.
[12] Fei H, Chris J Cornelius.Polyimide-SiO2-TiO2 nanocomposite structural study probing free volume, physical properties, and gas transport[J].Journal of Materials Science, 2017, 542:110-122.
[13] 李树轩, 黄良伟, 苏保卫, 等.交联聚酰亚胺耐溶剂超滤膜的制备及性能研究[J].膜科学与技术, 2018, 38(5):52-59.
[14] Zhao Y L, Qi X W, Ma J, et al.Interface of polyimide-silica grafted with different silane coupling agents:molecular dynamic simulation[J].Journal of Applied Polymer Science, 2018, 135:45725.
[15] 吕永慧.聚酰亚胺多孔纤维的制备[D].北京:北京航天航空大学, 2014.
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