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A “PDMS-in-water” emulsion enables mechanochemically robust superhydrophobic surfaces with self-healing nature†
Nanoscale Horizons ( IF 8.0 ) Pub Date : 2019-09-13 , DOI: 10.1039/c9nh00519f Mingzheng Ge 1, 2, 3, 4, 5 , Chunyan Cao 5, 6, 7 , Fanghua Liang 1, 2, 3, 4, 5 , Rong Liu 1, 2, 3, 4, 5 , Yu Zhang 1, 2, 3, 4, 5 , Wei Zhang 1, 2, 3, 4, 5 , Tianxue Zhu 5, 8, 9, 10 , Bo Yi 5, 6, 7 , Yuxin Tang 5, 11, 12 , Yuekun Lai 5, 8, 9, 10
Nanoscale Horizons ( IF 8.0 ) Pub Date : 2019-09-13 , DOI: 10.1039/c9nh00519f Mingzheng Ge 1, 2, 3, 4, 5 , Chunyan Cao 5, 6, 7 , Fanghua Liang 1, 2, 3, 4, 5 , Rong Liu 1, 2, 3, 4, 5 , Yu Zhang 1, 2, 3, 4, 5 , Wei Zhang 1, 2, 3, 4, 5 , Tianxue Zhu 5, 8, 9, 10 , Bo Yi 5, 6, 7 , Yuxin Tang 5, 11, 12 , Yuekun Lai 5, 8, 9, 10
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It is highly challenging to construct a durable superhydrophobic coating for practical applications since the coating is easily destroyed by mechano-chemical attack. To address this issue, a “PDMS-in-water” emulsion approach is for the first time adopted to design a mechanochemically robust superhydrophobic cotton fabric with intelligent self-healing nature, without using any fluorine-containing components. With this approach, PDMS molecules firstly penetrate into the cotton fiber, and then graft onto the surface of the cotton fabric with a strong binding force, creating hierarchical rough structures and lowering the surface energy simultaneously. Benefitting from this design, the PDMS@cotton fabric exhibits high superhydrophobicity with a water contact angle over 155°, surpassing all the PDMS-in-organic solvent based approaches. Impressively, the surface repairs its superhydrophobicity throughout the whole lifetime though damaged by machine washing or abrasion (>100 cycles), due to the self-diffusion process of PDMS molecules from the inner part to the outer surface of the cotton fibers to minimize surface free energy. Besides, the superhydrophobic coatings display superior chemical stability in strongly acidic and alkaline solution, and maintain similar textile physical properties of the cotton fabric, such as elongation at break, tensile strength, etc. Our environment-friendly “PDMS-in-water” approach can be easily integrated into industrial textile finishing treatment and is promising to apply to various substrates with robust superhydrophobic surfaces.
中文翻译：
“ PDMS-in-water”乳液可实现具有自修复特性的机械化学坚固的超疏水表面†
构建耐久的超疏水涂层以用于实际应用是极具挑战性的，因为该涂层很容易被机械化学侵蚀而破坏。为了解决这个问题，首次采用“水中PDMS”乳液方法来设计具有智能自修复特性的机械化学稳健的超疏水棉织物，而无需使用任何含氟成分。通过这种方法，PDMS分子首先渗透到棉纤维中，然后以强大的结合力接枝到棉织物的表面上，从而形成分层的粗糙结构并同时降低表面能。得益于此设计，PDMS @ cotton织物具有超疏水性，水接触角超过155°，超越了所有基于PDMS的有机溶剂方法。令人印象深刻 尽管PDMS分子从棉纤维内部到外部的自扩散过程使表面自由能减至最小，但表面在整个生命周期中均能修复其超疏水性，尽管会受到机洗或磨损（> 100次循环）的破坏。此外，超疏水涂层在强酸和强碱溶液中显示出优异的化学稳定性，并保持棉织物类似的纺织品物理性能，例如断裂伸长率，拉伸强度，等我们的环境友好型“PDMS-水”的方法可以很容易地集成到产业用纺织品精加工处理，并承诺将适用于具有强大的超疏水表面各种基材。
更新日期：2019-12-17
中文翻译：
“ PDMS-in-water”乳液可实现具有自修复特性的机械化学坚固的超疏水表面†
构建耐久的超疏水涂层以用于实际应用是极具挑战性的，因为该涂层很容易被机械化学侵蚀而破坏。为了解决这个问题，首次采用“水中PDMS”乳液方法来设计具有智能自修复特性的机械化学稳健的超疏水棉织物，而无需使用任何含氟成分。通过这种方法，PDMS分子首先渗透到棉纤维中，然后以强大的结合力接枝到棉织物的表面上，从而形成分层的粗糙结构并同时降低表面能。得益于此设计，PDMS @ cotton织物具有超疏水性，水接触角超过155°，超越了所有基于PDMS的有机溶剂方法。令人印象深刻 尽管PDMS分子从棉纤维内部到外部的自扩散过程使表面自由能减至最小，但表面在整个生命周期中均能修复其超疏水性，尽管会受到机洗或磨损（> 100次循环）的破坏。此外，超疏水涂层在强酸和强碱溶液中显示出优异的化学稳定性，并保持棉织物类似的纺织品物理性能，例如断裂伸长率，拉伸强度，等我们的环境友好型“PDMS-水”的方法可以很容易地集成到产业用纺织品精加工处理，并承诺将适用于具有强大的超疏水表面各种基材。
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