Fast UV-Curable Zwitter-Wettable Coatings with Reliable Antifogging/Frost-Resisting Performances

被引:10
|
作者
Zhong, Hao [1 ,2 ]
Liu, Xiaoxiao [2 ]
Yu, Boxin [3 ]
Zhou, Shengzhu [4 ]
机构
[1] Yanbian Univ, Agr Coll, Yanbian 133002, Peoples R China
[2] Jilin Acad Agr Sci, Inst Anim Husb & Vet Med, Changchun 130119, Peoples R China
[3] First Hosp Jilin Univ, Dept Gen Practice, Changchun 130021, Peoples R China
[4] Second Hosp Jilin Univ, Dept Anesthesiol, Changchun 130061, Peoples R China
关键词
antifogging; frost-resisting; zwitter-wettable; UV illumination; acrylate coating; LAYER; ANTIREFLECTION; SURFACES; ANTIFOG; FILMS;
D O I
10.3390/biomimetics7040162
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Antifogging surfaces with unique properties to migrate severe fog formation have gained extensive interest, which is of particular interest for transparent substrates to obtain high visibility and transparency. To date, a large number of strategies including superhydrophilic or superhydrophobic surfaces and titanium dioxide (TiO2)-based composite coatings have been developed based on different mechanisms. Although these surfaces exhibit effective antifogging properties, the rigid nanostructures, cumbersome preparation, and the need for UV light excitation largely limit their widespread applications. Herein, we report a zwitter-wettable antifogging and frost-resisting coating through a fast UV-curable cross-linking of copolymer with benzophenone groups. A series of random copolymers consisting of hydrophilic hydroxyethyl methacrylate (HEA), hydrophobic methyl methacrylate (MMA), and benzophenone-based acrylate units are developed by thermally triggered free-radical polymerization. Upon UV light irradiation, a highly efficient antifogging/frost-resisting coating is covalently bonded on a polycarbonate plate surface, maintaining a light transmission higher than 85%, which was confirmed in both high and low temperature anti-fog tests. Moreover, the wetting behaviors reveal that the antifogging performance exhibited by the zwitter-wettable surface mainly relies on its surface water-adsorbing capability to imbibe condensed water vapor on the surface outmost layer. Notably, the antifogging/frost-resisting behaviors can be well regulated by adjusting the hydrophilic/hydrophobic units, due to the proper balance between the water-adsorption and coating stability. Owing to its simplicity, low-cost preparation and high efficiency, this UV-curable acrylate antifogging coating may find a wide range of applications in various display devices in analytical and detection instruments.
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页数:12
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