High-performance polyimide nanofibers reinforced polyimide nanocomposite films fabricated by co-electrospinning followed by hot-pressing
High-performance polyimide nanofibers reinforced polyimide nanocomposite films fabricated by co-electrospinning followed by hot-pressing
复制标题
共静电纺丝热压制备高性能聚酰亚胺纳米纤维增强聚酰亚胺纳米复合薄膜
DOI：
10.1002/app.46849
复制
发表时间：
2018-12-15
影响因子：
3
通讯作者：
Hou, H.
中科院分区：
文献类型：
--
作者：
Xu, W.;Ding, Y.;Hou, H.
本研究的目的是开发定向静电纺丝聚酰亚胺（PI）纳米纤维（刚性大分子主链）增强PI（柔性大分子主链）纳米复合膜。由于取向PI纳米纤维的均匀分散和填料与基体之间优异的界面粘合/相互作用，所得纳米复合膜表现出优异的上级力学和热性能。采用共静电纺丝法制备了两种聚酰胺酸（PAA）的纳米复合膜，（对亚苯基联苯四甲酰亚胺）（BPDA-PDA）和聚乙烯的柔性PAA（1，4-双（3 '，4'-二羧基苯氧基）苯基二苯醚四胺）（HQDA-ODA）;在热酰亚胺化时，混合PAA胶带（具有不同重量比的BPDA-PDA/HQDA-ODA）转化为混合PI胶带。随后，将这些砂带热压以制造用BPDA-PDA PI纳米纤维增强的HQDA-ODA PI纳米复合材料膜;具体地，由80重量% BP-PI纳米纤维组成的纳米复合材料膜表现出最高的拉伸强度和模量，分别为957 +/- 18 MPa和12.32 +/- 0.32 GPa。纳米复合膜还具有优异的热/热机械性能。因此，这些纤维增强PI纳米复合薄膜可能是有前途的高性能结构/工程材料，特别适用于高温应用。此外，共静电纺丝混合胶带然后热压的策略可以为制造高性能聚合物基复合材料提供创新方法。(c)2018 Wiley Periodicals，Inc. J.应用聚合物Sci. 2018，135，46849。
The objective of this study was to develop aligned electrospun polyimide (PI) nanofibers (with rigid macromolecular backbone) reinforced PI (with flexible macromolecular backbone) nanocomposite films. Owing to uniform dispersion of aligned PI nanofibers and excellent interfacial adhesion/interaction between filler and matrix, the resulting nanocomposite films exhibited superior mechanical and thermal properties. The nanocomposite films were fabricated by co-electrospinning of two polyamic acids (PAAs) including a rigid PAA of poly(p-phenylene biphenyltetracarboximide) (BPDA-PDA) and a flexible PAA of poly(1,4-bis (3 ',4 '-dicarboxyphenoxy) phenyldiphenyl ether tetramine) (HQDA-ODA); upon thermal imidization, hybrid PAA nanofiber belts (with different weight ratios of BPDA-PDA/HQDA-ODA) were converted into hybrid PI nanofiber belts. Subsequently, these nanofiber belts were hot-pressed to fabricate HQDA-ODA PI nanocomposite films reinforced with BPDA-PDA PI nanofibers; in specific, the nanocomposite film consisting of 80 wt % BP-PI nanofibers exhibited the highest tensile strength and modulus of 957 +/- 18 MPa and 12.32 +/- 0.32 GPa, respectively. The nanocomposite films also possessed excellent thermal/thermomechanical properties. Therefore, these fiber-reinforced PI nanocomposite films might be promising high-performance structural/engineering materials that would be particularly useful for high-temperature applications. Moreover, the strategy of co-electrospinning hybrid nanofiber belts followed by hot-pressing could provide an innovative approach for making high-performance polymer-matrix composites. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46849.