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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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超疏水高分子材料表面的微结构设计及其可调的黏附性
DOI: 10.11777/j.issn1000-3304.2015.14235, PP. 245-251
Keywords: 微注射压缩成型,超疏水,黏附性,荷叶效应,花瓣效应,多层次结构
Abstract:
采用微注射压缩技术,以单步模板法制备表面具有微结构的大尺寸聚丙烯样品.以2种目数不同的筛网为模板,制备的样品表面呈现由微棱和高纵横比的微锥体构成的双级复合微结构;构建由上述2种筛网与2种孔径不同的冲孔板叠加而成的4种模板,制备的样品表面呈现由均匀分布的微柱和其顶面的上述双级复合微结构构成的三级复合微结构.这6种表面的静态接触角均高于150°(即呈现超疏水特性),滚动角在5.5°至大于90°之间变化(即黏附性可在大范围内调节).对在直径较小的微柱上成型数量较少的微锥体和微棱的表面,水滴形成全局非复合润湿状态,从而呈现高粘附特性(花瓣效应);对在直径较小的微柱上成型数量较多的微锥体和微棱的表面,水滴形成局部非复合润湿状态,呈现较高粘附特性;对呈现双级复合微结构或在直径较大的微柱上成型数量较多的微锥体和微棱的表面,水滴形成全局复合润湿状态,呈现较低粘附特性,其中微锥体及其间隙较小的表面呈现荷叶效应.
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