高分子薄膜的三维显微表征  

3D microscopic characterization of polymer films

作　　者：何炳恩 邵盛培 梁霄 陈家董 殷盼超 毛雁 吴明星[4] 龚湘君 张广照[1] HE Bing-en;SHAO Sheng-pei;LIANG Xiao;CHENG Jia-dong;YIN Pan-chao;MAO Yan;WU Ming-xing;GONG Xiang-jun;ZHANG Guang-zhao(Faculty of Material Science and Engineering,South China University of Technology,Guangzhou 510640,China;School of Marine Science and Engineering,South China University of Technology,Guangzhou 510640,China;State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510640 China;State Key Laboratory of Ophthalmology,Zhongshan Ophthalmic Center,Sun Yat-sen University,Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science,Guangzhou 510060,China)

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]华南理工大学海洋科学与工程学院,广东广州510640 [3]华南理工大学华南软物质科学与技术高等研究院,广东广州510640 [4]中山大学中山眼科中心眼科学国家重点实验室,广东省眼科视觉科学重点实验室,广东广州510060

出　　处：《液晶与显示》2023年第6期778-788,共11页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No.21973032)。

摘　　要：高分子薄膜通常具有结晶、相分离等微尺度结构,同时在制备和加工过程中也会形成表面缺陷、气泡等不均匀结构,这些都会严重影响其性能。然而,表征这些结构目前还没有很好的方法。本文探究了数字全息显微镜(Digital Holographic Microscopy,DHM)这一原位、无损、高精度的光学三维显微技术在高分子薄膜表面及内部结构、缺陷表征中的应用。利用自建的DHM和三维连续定位算法对100 nm聚苯乙烯纳米颗粒在液相薄层中的分布、晶圆涂覆聚氨酯后表面的形貌、聚甲基丙烯酸酯薄膜与水的相分离过程、聚乙二醇薄膜干燥过程中的边缘结晶、聚乙烯醇薄膜内的微纳气泡进行了表征,证明DHM具有很高的成像分辨率,能够对高分子薄膜的表面和内部同时实现高精度的原位三维缺陷监测与结构表征,具有独特的优势和应用前景。The defects and heterogenous structures which are far beyond the molecular scale always exist on the film surfaces or inside the films,such as surface defects,phase separation,crystallization,microbubbles and other impurity particles,resulting in the significant decline of their performance.Until now,in-situ characterization of these defects and structures is still challenging.Herein,we explore the applications of the digital holographic microscope(DHM),an in-situ,nondestructive and high-precision optical 3D imaging technique,in the 3D characterizations of both the surface and internal defects of polymer films.Examples include 3D distribution characterization of 100 nm polystyrene nanoparticles in a thin liquid layer,morphology of the surface of the polyurethane coated wafer,phase separation process of polymethacrylate film from water,edge crystallization monitoring during the drying of polyethylene glycol film,and characterization of micro-nano bubbles in the polyvinyl alcohol film.Obviously,DHM has unique advantages and is promising for future applications in polymer film characterization.

关 键 词：高分子薄膜 数字全息 三维成像 

分 类 号：O631.24[理学—高分子化学]