Polydimethylsiloxane-based superhydrophobic membranes: fabrication, durability, repairability, and applications,Polymer Chemistry

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Polydimethylsiloxane-based superhydrophobic membranes: fabrication, durability, repairability, and applications
Polymer Chemistry ( IF 4.1 ) Pub Date : 2020/03/03 , DOI: 10.1039/c9py01861a
Maolin Liu _{1,

2,

3,

4} , Yuanfang Luo _{1,

2,

3,

4} , Demin Jia _{1,

2,

3,

4}

Affiliation

A series of challenges, such as abrasion sensitivity and weak adhesion, has hindered the development of superhydrophobic materials for use in emerging fields. In this work, a roughness-regenerating superhydrophobic membrane with durability and repairability characteristics was synthesized via integrating vinyl-terminated polydimethylsiloxane (V-PDMS), vinyltriethoxysilane (VTES), and silica particles (SiO₂). With the optimization of the textured material, double cross-linking networks and dual-scale rough structures were established in the polymer skeleton, endowing the superhydrophobic membrane with outstanding superhydrophobicity (CA: >164°; SA: <1°). Taking advantage of the bulk superhydrophobicity and roughness-regenerating characteristics, the superhydrophobic membrane demonstrated mechanical durability during multi-cycle sandpaper abrasion (>75 cycles). More importantly, the roughness-regenerating characteristics enabled the special wettability of the damaged superhydrophobic membrane to be repaired via sanding treatment without the utilization of healing agents (>15 cycles). Interestingly, based on the underwater light-reflection of the superhydrophobic material, underwater pattern display was successfully realized on the superhydrophobic membrane, which may broaden its fields of application. Our findings certainly introduce a facile method to fabricate advanced superhydrophobic materials for use in emerging fields.

中文翻译：

聚二甲基硅氧烷基超疏水膜：制造，耐用性，可修复性和应用

一系列挑战，例如耐磨性和弱粘合性，阻碍了用于新兴领域的超疏水材料的开发。在这项工作中，通过结合乙烯基封端的聚二甲基硅氧烷（V-PDMS），乙烯基三乙氧基硅烷（VTES）和二氧化硅颗粒（SiO ₂），合成了具有耐用性和可修复性的粗糙度再生超疏水膜。）。通过优化纹理材料，在聚合物骨架中建立了双交联网络和双尺度粗糙结构，使超疏水膜具有出色的超疏水性（CA：> 164°； SA：<1°）。利用整体超疏水性和粗糙度再生特性，该超疏水膜在多循环砂纸磨耗（> 75次循环）中表现出机械耐久性。更重要的是，粗糙度再生特性使受损的超疏水膜的特殊润湿性能够通过不使用愈合剂（> 15个循环）进行打磨处理。有趣的是，基于超疏水材料的水下光反射，在超疏水膜上成功实现了水下图案显示，这可能拓宽了其应用领域。我们的发现无疑引入了一种简便的方法来制造用于新兴领域的高级超疏水材料。

更新日期：2020-03-31

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