Bioinspired superhydrophobic-superhydrophilic convertible film based on anisotropic red blood cell-like particles with protuberances
Bioinspired superhydrophobic-superhydrophilic convertible film based on anisotropic red blood cell-like particles with protuberances
复制标题
基于具有突起的各向异性红细胞样颗粒的仿生超疏水-超亲水可转换薄膜
DOI：
10.1016/j.colsurfa.2019.123674
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Zhang Xinya
中科院分区：
文献类型：
--
作者：
Chen Xiaofei;Song Liujun;Jiang Xiang;Zhang Xinya
采用分散聚合法制备了一种形貌新颖的具有突起的红细胞样颗粒（P-RBC）。基于这些粒子，具有很强的水粘附性的超疏水涂层膜和超亲水膜的制备取决于在自组装过程中的粒子的取向。当粒子空穴方向朝下时，制备的超疏水涂层的水接触角（CA）为163.6°。颗粒较大的微纳结构导致了较强的水粘附力。水滴紧密附着在涂膜表面，即使将其倒置。当颗粒空腔向上时，在空腔的储存能力、有序颗粒形成的通道的渗透能力和表面粗糙度增加的共同作用下，涂膜转变为CA为3.8°的超亲水性。研究结果表明，各向异性胶体颗粒以其上级润湿特性在材料输送、防水保护、油水分离等领域具有潜在的应用前景。
A novel morphology structure of red blood cell-like (RBC) particles with protuberances (P-RBC) was prepared through dispersion polymerization process. Based on these particles, a superhydrophobic coating film with strong water adhesion and a superhydrophilic film was fabricated depending on orientation of particles during self-assembly progress. The superhydrophobic coating film with water contact angle (CA) of 163.6° was fabricated when the direction of particle cavity was facing-down. Strong water adhesion was resulted from the larger micro-nano structure of particles. Waterdrop tightly attached to the surface of the coating film even if it was taken upside down. Whilst if the cavity of particles was upward, the coating film was transferred to be superhydrophilic of CA of 3.8° under co-efforts of storage ability of cavities, penetration capacity of channel formed by well-ordered particles, and increased surface roughness. This work gives that anisotropy colloidal particles have potential application with their superior wetting characteristics in many fields, such as material transfer process, waterproof protection and oil-water separation.