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Superhydrophobic Modification on Starch Film Using PDMS and Ball-Milled MMT Coating
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-06-22 , DOI: 10.1021/acssuschemeng.0c02077 Ying Chen 1 , Hongsheng Liu 1, 2 , Long Yu 1, 2 , Qingfei Duan 1 , Zhili Ji 1 , Ling Chen 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-06-22 , DOI: 10.1021/acssuschemeng.0c02077 Ying Chen 1 , Hongsheng Liu 1, 2 , Long Yu 1, 2 , Qingfei Duan 1 , Zhili Ji 1 , Ling Chen 1
Affiliation
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Superhydrophobic starch-based films were prepared using poly(dimethylsiloxane) (PDMS) and ball-milled montmorillonite (MMT) coating. The hydrophilic and moisture-sensitive starch-based films coated with PDMS could create a hydrophobic surface with a static contact angle of water up to 115.2 ± 1.2° but could not achieve superhydrophobic behavior. On the other hand, the starch-based film sprayed with MMT could achieve superhydrophobic behavior, but the adhesion between the starch matrix and MMT was weak. In this work, a spraying–immersion method was developed for coating starch film with PDMS and ball-milled MMT. The surface of the treated starch-based film had a contact angle of up to 159.1° and a sliding angle of 3.6°. SEM, TEM, XRD, particle size analysis, and optical profilometry were used to study the effects of PDMS and MMT on the surface properties of starch-based film, in particular PDMS/MMT ratio, MMT particle size, and preparation technologies. The results show that the hierarchical structure obtained by PDMS assisted by ball milling MMT provides the appropriate roughness to create low hysteresis superhydrophobic starch film. Increasing ball-milling time could increase the surface area and roughness, which results in increasing contact angle.
中文翻译：
使用PDMS和球磨MMT涂层对淀粉膜进行超疏水改性
使用聚二甲基硅氧烷（PDMS）和球磨蒙脱土（MMT）涂层制备了超疏水淀粉基薄膜。涂有PDMS的亲水性和湿敏性淀粉基薄膜可以形成疏水性表面，其水的静态接触角高达115.2±1.2°，但无法实现超疏水性。另一方面，用MMT喷涂的淀粉基薄膜可以实现超疏水性能，但淀粉基体与MMT之间的附着力较弱。在这项工作中，开发了一种喷雾浸没法，用PDMS和球磨MMT涂覆淀粉膜。处理过的淀粉基薄膜的表面具有高达159.1°的接触角和3.6°的滑动角。SEM，TEM，XRD，粒度分析，用光学轮廓法研究PDMS和MMT对淀粉基薄膜表面性能的影响，特别是PDMS / MMT比，MMT粒度和制备技术。结果表明，通过球磨MMT辅助PDMS获得的分层结构可提供适当的粗糙度，以产生低磁滞超疏水性淀粉薄膜。增加球磨时间会增加表面积和粗糙度，从而导致接触角增加。
更新日期：2020-07-20
中文翻译：
使用PDMS和球磨MMT涂层对淀粉膜进行超疏水改性
使用聚二甲基硅氧烷（PDMS）和球磨蒙脱土（MMT）涂层制备了超疏水淀粉基薄膜。涂有PDMS的亲水性和湿敏性淀粉基薄膜可以形成疏水性表面，其水的静态接触角高达115.2±1.2°，但无法实现超疏水性。另一方面，用MMT喷涂的淀粉基薄膜可以实现超疏水性能，但淀粉基体与MMT之间的附着力较弱。在这项工作中，开发了一种喷雾浸没法，用PDMS和球磨MMT涂覆淀粉膜。处理过的淀粉基薄膜的表面具有高达159.1°的接触角和3.6°的滑动角。SEM，TEM，XRD，粒度分析，用光学轮廓法研究PDMS和MMT对淀粉基薄膜表面性能的影响，特别是PDMS / MMT比，MMT粒度和制备技术。结果表明，通过球磨MMT辅助PDMS获得的分层结构可提供适当的粗糙度，以产生低磁滞超疏水性淀粉薄膜。增加球磨时间会增加表面积和粗糙度，从而导致接触角增加。
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