王丹,高志敏,李中华,满彦汝,高原.环境因素对聚酰亚胺薄膜及涂层侵蚀效应分析[J].表面技术,2018,47(1):123-128.
WANG Dan,GAO Zhi-min,LI Zhong-hua,MAN Yan-ru,GAO Yuan.Analysis of Erosion Effect of Environmental Factors on Polyimide Films and Coatings[J].Surface Technology,2018,47(1):123-128
环境因素对聚酰亚胺薄膜及涂层侵蚀效应分析
Analysis of Erosion Effect of Environmental Factors on Polyimide Films and Coatings
投稿时间:2017-07-24  修订日期:2018-01-20
DOI:10.16490/j.cnki.issn.1001-3660.2018.01.019
中文关键词:  聚酰亚胺  二氧化硅涂层  表面改性  原子氧  环境效应
英文关键词:polyimide  silica coatings  surface modification  atomic oxygen  environmental effect
基金项目:国家自然科学基金项目(51573155)
作者单位
王丹 烟台大学 化学化工学院,烟台 264005 
高志敏 烟台大学 化学化工学院,烟台 264005 
李中华 兰州空间技术物理研究所 真空技术与物理国防科技重点实验室,兰州 730000 
满彦汝 烟台大学 化学化工学院,烟台 264005 
高原 烟台大学 化学化工学院,烟台 264005 
AuthorInstitution
WANG Dan School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China 
GAO Zhi-min School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China 
LI Zhong-hua National Key Lab of Science and Technology on Vacuum Technology & Physics, Lanzhou Institute of Physics, Lanzhou 730000, China 
MAN Yan-ru School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China 
GAO Yuan School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China 
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中文摘要:
      目的 采用不同表面改性方法处理聚酰亚胺,研究温度、湿度、紫外辐照和原子氧等环境因素对聚酰亚胺基体及涂层的侵蚀效应。方法 用碱性溶液(NaOH)、硅烷偶联剂(KH-550)分别在水热及溶剂热条件下处理聚酰亚胺薄膜。用溶胶凝胶法制备二氧化硅溶胶,并在改性后的聚酰亚胺薄膜表面制备二氧化硅涂层。处理后样品的亲水性变化由接触角测量仪测定,透光率用紫外可见分光光度计表征,表面形貌用扫描电镜观察,表面结构变化由傅里叶变换红外光谱仪测定。环境效应试验用紫外老化箱和原子氧模拟试验装置进行评价,并用扫描电镜和材料显微镜表征环境因素对涂层产生的影响和破坏作用。结果 实验得出的最佳表面处理条件为:(1)NaOH浓度0.1 mol/L,水热温度120 ℃,时间60 min;(2)20vol% KH-550+80vol% EtOH,溶剂热温度180 ℃,时间60 min。在此条件下处理后的聚酰亚胺基体与二氧化硅涂层界面结合较牢固。结论 使用碱液水热处理与硅烷偶联剂溶剂热相结合的处理方法,可有效改善SiO2涂层与聚酰亚胺基体的界面粘附性。所制备的涂层均匀致密,具有很好的抗原子氧侵蚀能力,但在储运过程中必须注意环境湿度对涂层产生的破坏作用。
英文摘要:
      The work aims to study erosion effect of environmental factors including temperature, humidity, ultraviolet and atomic oxygen radiation on polyimide films and coatings by treating polyimide in different surface modification methods. The polyimide films were treated by alkaline solution (NaOH) under hydrothermal condition and silane coupling agent (KH-550) under solvothermal condition respectively. Silica sol was prepared in sol-gel method, and silica coatings were prepared on the modified polyimide films. Hydrophilicity, transmittance, surface morphology and surface structure change of the modified polyimide films was characterized by contact angle meter, ultraviolet visible spectrophotometer, scanning electronmicroscopy (SEM) and Fourier transform infrared spectrometer, respectively. Environmental effect test was evaluated with ultraviolet accelerated weatherometer and atomic oxygen simulator. The effect and destructive effect of environmental factors on the coatings were characterized with SEM and material microscope. The optimum surface treatment conditions were obtained: (1) 0.1 mol/L NaOH solution under hydrothermal condition at 120 ℃, 60 min; (2) 20vol% KH-550 + 80vol% EtOH under solvothermal condition at 180 ℃, 60 min. Interface between the polyimide substrate treated under the above conditions and silica coatings was bonded securely. The interface adhesion between polyimide substrate and SiO2 coatings can be effectively improved in surface modification methods of alkali hydrothermal treatment combined with silane coupling agent solvothermal process. The prepared silica coatings are homogeneous and dense, and resistant to atomic oxygen attack. However, destructive effect of environmental humidity on the coatings during the process of storage and transportation must be noted.
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