Anti-atomic oxygen properties of silicone coating modified by nano-ZnO
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摘要: 为了进一步提高有机硅涂层的抗原子氧剥蚀能力,采用经硅烷偶联剂处理的纳米ZnO微粒,在聚酰亚胺薄膜基材表面制备出纳米ZnO-有机硅复合涂层.通过原子氧地面模拟试验,研究了纳米ZnO-有机硅复合涂层的质量损失、表面形貌及化学成分的变化规律.结果表明:经表面处理的纳米ZnO微粒可以均匀分布在有机硅涂层中,有效消除有机硅树脂成膜过程中产生的微裂纹.经过原子氧辐照试验,没有保护涂层的聚酰亚胺基材的质量损失较大,而涂覆纳米ZnO-有机硅复合涂层具有良好的抗原子氧剥蚀性能,其质量损失和微观表面形貌变化很小,并且随着涂层中纳米ZnO含量的增加,其抗原子氧剥蚀的能力进一步增强.Abstract: To improve the anti-atomic oxygen properties of silicone coating, nano-ZnO modified by silane coupling reagent was filled in the silicone resin and nano-ZnO/silicone composite coating on polyimide film was obtained. Polyimide with and without nano-ZnO/silicone coating was exposed to atomic oxygen(AO) in a ground-based AO effect simulation facility. The modified nano-ZnO particles were uniformly distributed within the silicone coating so that micro-cracks occurred during film-forming of the silicone were eliminated effectively. The AO experiment results indicate that polyimide is significantly eroded which is characterized by substantial weight loss and change of surface morphologies; nano-ZnO/silicone coatings exhibit excellent properties for anti-atomic oxygen effects with little variation in weight or morphology. The anti-oxygen properties of the coatings were improved along with the increase of nano-ZnO content.
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Key words:
- nano-ZnO /
- modification /
- silicone /
- atomic oxygen
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[1] 都亨,叶宗海.低轨道航天器空间环境手册[M].北京:国防工业出版社,1996:1-6 Du Heng, Ye Zonghai. Handbook for spacecrafts traveling in low orbit[M].Beijing:National Defence Industry Press, 1996:1-6 (in Chinese) [2] Silverman E M.Spacecraft environmental effects on spacecraft: LEO materials selection guide:part 1 .NASA CR-4661,1996 [3] 盛磊.原子氧环境对聚合物及其复合材料性能的影响[J].中国空间科学技术,1994, 10(5):53-60 Sheng Lei.Effects on polymer and composites properties by atomic oxygen[J].Chinese Space Science and Technology, 1994,10(5):53-60(in Chinese) [4] 湛永钟,张国定.低地球轨道环境对材料的影响[J].宇航材料工艺,2003, 33(1):1-5 Zhan Yongzhong, Zhang Guoding. Low earth orbit environmental effects on materials[J]. Aerospace Materials and Technology, 2003, 33(1):1-5(in Chinese) [5] Linton R C, Vaughn J A,Finckenor M M, et al.In orbital atomic oxygen effects on materials: an overview of MSFC experiments on the STS-46 EOIM-3 .AIAA-93-4102, 1993 [6] Kamenetzky R R, Linton R C, Finckenor M M, et al.Effects atomic oxygen on polymeric materials flown on EOIM-3 .AIAA-93-4103,1993 [7] Banks B A,Mille S K,de Groh K K.Low earth atomic oxygen interactions with material .AIAA 2004-5638,2004 [8] 多树旺,李美拴,张亚明,等.低空间轨道环境中的原子氧对空间材料的侵蚀与防护涂层[J].腐蚀科学与防护技术,2002, 14(3):152-156 Duo Shuwang, Li Meishuan, Zhang Yaming, et al.Atomic oxygen attack on space materials in LEO environment and protective coatings[J].Corrosion Science and Protection Technology,2002, 14(3):152-156(in Chinese) [9] Tan Ing H, Ueda M, Dallaqua R S, et al.Magnesium implantation by plasma immersion in polymers for oxidation protection in low earth orbit environment[J]. Plasma Processes and Polymers,2007,4:S1081-S1085 [10] 张金柱,汪信,陆路德,等.纳米无机粒子对塑料增强增韧的"裂缝与银纹相互转化"机理[J].工程塑料应用,2003, 33(1):20-22 Zhang Jinzhu, Wang Xin, Lu Lude, et al.Mutual transfer mechanism of crack and craze of toughening and reforceing of plastics modified by inorganic nanoparticles[J]. Engineering Plastics Application, 2003, 33(1):20-22(in Chinese) [11] Lee J, Bhattacharyya D, Easteal A J, et al.Properties of nano-ZnO/poly(vinyl alcohol)/poly(ethylene oxide) composite thin films[J].Current Applied Physics, 2008, 8(1):42-47 [12] 方征平,徐钰珍,许承威.纳米粒子对聚合物的改性机理[J].材料科学与工程学报,2003, 21(2):279-282 Fang Zhengping, Xu Yuzhen, Xu Chengwei. Modification mechanism of nanoparticles on polymers[J].Materials Science and Engineering, 2003, 21(2):279-282(in Chinese)
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