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- 2018
球磨共混制备优异抗原子氧性能的氧化石墨烯/聚酰亚胺复合薄膜
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Abstract:
通过简单的机械共混（球磨共混）和高温压制的方法，制备了一系列具有良好抗原子氧（AO）性能的氧化石墨烯/聚酰亚胺（GO/PI）复合薄膜。微量（0.5wt%） GO的引入可使GO/PI复合薄膜的抗AO性能提高17.9%。同时，含0.5wt% GO的GO/PI复合薄膜也表现出良好的热稳定性能和力学性能。热重分析表明，含0.5wt% GO的GO/PI复合薄膜在质量损失为5%时的温度（Td5）为519.4℃，比纯PI薄膜高14.7℃；拉伸强度为111.9 MPa，杨氏模量为2.1 GPa，与纯PI薄膜相比，分别提高了4.3 MPa和0.1 GPa。与传统的原位聚合法相比，机械共混-高温压制的方式更易于操作和控制，使具有优异综合性能的GO/PI复合薄膜的大规模量产成为可能。 A series of graphene oxide/polyimide (GO/PI) composite films with excellent atomic oxygen (AO) resistance property was prepared by simple mechanical mixing (i.e. ball milling) of GO and PI followed by thermal compression. With a tiny addition of GO (0.5wt%), AO resistance property of GO/PI composite films with 0.5wt% GO addition is improved by approximately 17.9%, compared to the pure PI film. GO/PI composite films with 0.5wt% GO addition demonstrate excellent thermal stability and mechanical properties. The 5% mass loss temperature (Td5) in nitrogen is 519.4℃, 14.7℃ higher than that of the pure PI film; the tensile strength and Young's modulus are 111.9 MPa and 2.1 GPa, 4.3 MPa and 0.1 GPa higher than those of the pure PI film, respectively. Compared to in situ polymerization used to fabricate GO/PI composite films, our method is much easier to operate and control, which makes it possible to manufacture GO/PI composite films with excellent comprehensive properties on a large scale. 国家自然科学基金（21676217；51503170）；高分子材料工程国家重点实验室（四川大学）（sklpme2015-4-22）；西北工业大学中央高校基础研究基金（3102016BJY01）
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