Water-repellent hierarchical microstructured PTFE films via micro powder hot embossing
Water-repellent hierarchical microstructured PTFE films via micro powder hot embossing
复制标题
DOI：
10.1016/j.jmatprotec.2021.117261
复制
发表时间：
2021-06
影响因子：
6.3
通讯作者：
Jie Gao;Yujun Deng;Linfa Peng;P. Yi;Zhong-qin Lin
中科院分区：
文献类型：
--
作者：
Jie Gao;Yujun Deng;Linfa Peng;P. Yi;Zhong-qin Lin
学术界和工业界都对制备分级微结构表面以获得不同的润湿性进行了研究。聚四氟乙烯（PTFE）由于其超低的表面能，是制备超疏水表面的理想材料。然而，在PTFE表面制备分级结构仍然是一个挑战。本文采用微粉热压花（mPHE）工艺成功制备了具有分级结构的PTFE薄膜。通过表征，最大接触角和最小滑动角分别可达164°和5.3°。讨论了加工参数和颗粒尺寸对成形质量的影响。提出了一种无量纲指标来成功描述层次特征并表征润湿状态与成形质量之间的关系。最后进行了一系列机械和化学耐久性测试，验证了所制备的PTFE薄膜的实际应用价值。
The preparation of hierarchical microstructured surfaces to obtain different wettability has been studied in both academy and industry. Polytetrafluoroethylene (PTFE) is an ideal material for preparing superhydrophobic surface due to its ultra-low surface energy. However, it is still a challenge to prepare hierarchical structure on the surface of PTFE. In this paper, PTFE films with hierarchical structure were successfully prepared by micro powder hot embossing (mPHE) process. Through characterization, the maximum contact angle and minimum sliding angle can reach up to 164° and 5.3° respectively. The influence of processing parameters and particle size on forming qualities was discussed. A dimensionless indicator was proposed to successfully describe the hierarchical character and characterize the relationship between wetting states and forming quality. Finally, a series of mechanical and chemical durability tests were carried out, verifying the practical application value of the prepared PTFE films.