杨华荣,李梦,赵欣,赵皓东,黄成超.磁控诱导超疏水柔性薄膜的制备及其性能研究[J].表面技术,2022,51(12):303-311.
YANG Hua-rong,LI Meng,ZHAO Xin,ZHAO Hao-dong,HUANG Cheng-chao.Preparation and Performance of Magnetically Induced Super-hydrophobic Flexible Film[J].Surface Technology,2022,51(12):303-311
磁控诱导超疏水柔性薄膜的制备及其性能研究
Preparation and Performance of Magnetically Induced Super-hydrophobic Flexible Film
  
DOI:10.16490/j.cnki.issn.1001-3660.2022.12.031
中文关键词:  超疏水  微纳结构  磁响应  黏附性  自清洁
英文关键词:super-hydrophobic  micro-nano structure  magnetically responsive  adhesion  self-cleaning
基金项目:结冰与防除冰重点实验室开放课题(IADL20190407);中国民用航空飞行学院研究生科研创新项目(X2021?8)
作者单位
杨华荣 中国民用航空飞行学院 航空工程学院,四川 广汉 618307 
李梦 中国民用航空飞行学院 航空工程学院,四川 广汉 618307 
赵欣 中国民用航空飞行学院 航空工程学院,四川 广汉 618307 
赵皓东 中国民用航空飞行学院 航空工程学院,四川 广汉 618307 
黄成超 中国民用航空飞行学院 航空工程学院,四川 广汉 618307 
AuthorInstitution
YANG Hua-rong Faculty of Aerospace Engineering, Civil Aviation Flight University of China, Sichuan Guanghan 618307, China 
LI Meng Faculty of Aerospace Engineering, Civil Aviation Flight University of China, Sichuan Guanghan 618307, China 
ZHAO Xin Faculty of Aerospace Engineering, Civil Aviation Flight University of China, Sichuan Guanghan 618307, China 
ZHAO Hao-dong Faculty of Aerospace Engineering, Civil Aviation Flight University of China, Sichuan Guanghan 618307, China 
HUANG Cheng-chao Faculty of Aerospace Engineering, Civil Aviation Flight University of China, Sichuan Guanghan 618307, China 
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中文摘要:
      目的 采用简单的制备方案,在不同结构类型模板表面制备具有自清洁特性和良好移植特性的超疏水柔性薄膜。方法 磁性微粒为了在磁场环境中获得能量最低的平衡态,能自发响应与外加磁场平行的共线偶极矩粒子链。基于磁场环境中磁性微粒的受控机理,以不同粒径的羰基铁粉为磁性分散相,以聚二甲基硅氧烷为载体,配制出不同质量分数的磁性混合液,再采用湿膜制备器将磁性混合液分别涂敷在光滑的一次结构模板和具有规则微观形貌的二次结构模板表面,并将其置于磁场环境中,待磁性涂层在室温条件下预固化12 h后,再将涂层移至真空干燥箱中,在120 ℃下固化3 h,形成具有疏水性的柔性薄膜。结果 二次结构模板表面形成的柔性薄膜相较于一次结构模板表面,所形成的柔性薄膜的微观结构更具多样性,更有利于水滴在薄膜表面形成Cassie−Wenzel状态。采用接触角测量仪测试5 μL的水滴在薄膜表面的抗润湿性能,结果表明,水滴在柔性薄膜表面的静态接触角大于150°,滚动角小于10°,并且所制备的样品不仅耐老化、结构适应性强,还具有自清洁等诸多特性,满足超疏水材料实际应用的要求。结论 一次结构模板和二次结构模板表面形成的连续型磁性微锥可使柔性薄膜表面实现超疏水功能,并且该制备方案操作简单、价格低廉、制备周期短,制备过程对人体和环境均无害,适用于工业化生产,为进一步探索主动除冰等功能奠定了基础。
英文摘要:
      The work aims to prepare super-hydrophobic flexible film with good self-cleaning and portability by simple scheme on the different structured template surfaces. It is an extremely simple and efficient method to prepare hydrophobic thin films with low cost (143 yuan/m2), short product cycle time (15 h), and self-cleaning and excellent structural adaptability for experimental samples and such films have great promise in biomedical, transportation and energy applications. Magnetic particles in an external magnetic environment responded spontaneously to a chain of common-linear dipole moment particles parallel to the applied magnetic field in order to maintain the lowest energy equilibrium state. By controlling the magnitude of magnetic induction in the external environment, the height, width and spacing between the magneto-cones formed by the lateral agglomeration of magnetic particle chains in the microstructure were adjusted to obtain the best anti-wetting state of water droplets on the surface of flexible films. This study focused on the effects of the formulation parameters of the magnetic mixture, the cured substrate of the hydrophobic films and the external magnetic induction strength on the hydrophobic properties of the sample films. The magnetic mixture of different concentrations was prepared with different particle sizes of carbonyl iron powder as the dispersed phase and polydimethylsiloxane as the carrier, and then the magnetic mixture was applied to the smooth primary structured template and the secondary structured template with regular microstructure by the film applicator, and placed in the external magnetic field environment, and the coating was pre-cured at room temperature for 12 h, and then moved to the vacuum drying oven at 120 ℃ for 3 h. The coating was cured for 3 h to form a flexible film with hydrophobic properties. The flexible films formed on the surface of secondary structured templates were observed by scanning electron microscopy, which had more diverse microstructures than the flexible films formed on the surface of primary structured templates, facilitating the formation of Cassie-Wenzel states on the surface of the films by water droplets. The wetting performance of 5 μL water droplets on the surface of flexible films was tested by contact angle measuring instrument. The results showed that the static contact angle of water droplets on the surface of flexible films was more than 150°, and the rolling angle was less than 10°, and the adhesion of water droplets on the surface of flexible films was low, and the rolling process could take away impurities on the surface of films, showing good self-cleaning property. Secondly, the film sample structure was highly adaptable and could be used on the surface of various complex configurations of components. The continuous magneto-microcones formed on the primary and secondary structured template surfaces can make the surface of the flexible films prepared under specific conditions completely superhydrophobic, but the overall hydrophobic performance of the flexible hydrophobic films formed on the secondary structured template surface is better than that of the flexible hydrophobic films formed on the primary structured template surface. The scheme has the advantages of simple operation, low price, short preparation cycle and the preparation process is harmless to both human body and the environment, which is suitable for industrial production, and the hydrophobic properties of hydrophobic films under different preparation parameters are characterized to lay the foundation for further functional development such as active deicing.
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