摘要
采用软刻蚀和二次转写法,研究了以聚二甲基硅氧烷(PDMS)仿生膜为基材复制家鸽羽毛表面微纳结构的方法.使用电子显微镜观察了羽毛及仿生膜的微观形貌,使用光学接触角测量仪测定了仿生膜表面的浸润性.结果表明:PDMS仿生膜成功复制了羽毛表面的多级粗糙结构,包括初级结构(羽枝)、次级结构(羽小枝)和三级结构(钩突).羽毛和仿生膜表面均具有双疏性,二者表面的蒸馏水接触角分别为141.3°和139.5°,乙二醇、丙三醇和甲酰胺接触角分别为110.8°~133.4°和96.6°~124.6°.羽毛和仿生膜表面对不同种类的有机溶剂(醇、胺、酮)均具有较高的疏油性.羽枝-羽小枝-钩突结构模型符合Cassie浸润模式,钩突半径越大、间距越小、接触角越大,疏水性越强.羽毛表面的超疏水性是结构耦元与材料耦元共同作用的结果.为构建多功能仿生表面材料提供了新思路和新方法.
Polydimethylsiloxane(PDMS)was used as substrate to duplicate the micro/nano structure of feather surface of domestic pigeon(Columba livia domestica)by means of soft etching and dual transcription.The micro-mophology of feather and biomimetic film was observed by a scanning electronic microscope,and the surface wettability was determined by an optical contact angle meter.The results show that the hierarchical rough structure is copied successfully from feather to PDMS,including primary(barb),secondary(barbule),and tertiary(protuberance)structure.The surfaces of feather and biomimetic film are hydrophobic and oleophobic.On the feather and biomimetic film,the contact angle of water is 141.3°and 139.5°,respectively;the contact angle of ethylene glycol,glycerine and formamide is 110.8°~133.4°and 96.6°~124.6°,respectively.The surfaces of feather and biomimetic film exhibit high resistance against wetting by different kinds of organic solvent(alcohol,amine,ketones).The barb-barbule-protuberance structural model accords with the Cassie wetting pattern.The bigger the protuberance radius is and the smaller the protuberance distance is,the larger the contact angle is,the high the hydrophobicity is.The super-hydrophobicity results from the combinative effect of microstructure and composition.The results might provide novel idea and method for development of multi-functional biomimetic surface materials.
作者
房岩
孙刚
关琳
龙彪
黄俊江
FANG Yan;SUN Gang;GUAN Lin;LONG Biao;HUANG Jun-jiang(School of Resources and Chemical Engineering,Fujian Provincial Medical Plant Exploitation and Utilization Engineering Research Center,Fujian Provincial Key Laboratory of Resources and Environment Monitoring&Sustainable Management and Utilization,Sanming University,Sanming 365004,China;School of Life Sciences,Changchun Normal University,Changchun 130032,China)
出处
《东北师大学报（自然科学版）》
CAS
北大核心
2020年第4期112-116,共5页
Journal of Northeast Normal University(Natural Science Edition)
基金
国家自然科学基金资助项目(31671010)
福建省自然科学基金资助项目(2020J01373)
吉林省自然科学基金资助项目(20180101280JC)
吉林省教育厅“十三五”科学技术项目(JJKH20181167KJ)
三明学院引进高层次人才科研启动项目(18YG02,18YG01).
关键词
羽毛
微纳结构
PDMS
双疏性
仿生
feather
micro/nano structure
PDMS
hydrophobic/oleophobic
bionics
