Chen Zhi, Wei Yumeng, Wu Cheng, Zhang Guojun, Han Fenglin
State Key Laboratory of Precision Manufacturing for Extreme Service Performance, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China.
Guangdong Provincial Key Laboratory of Manufacturing Equipment Digitization, Guangdong HUST Industrial Technology Research Institute, Dongguan 523808, China.
Polymers (Basel). 2024 Mar 26;16(7):912. doi: 10.3390/polym16070912.
In order to improve the preparation efficiency, quality stability, and large-area preparation of superhydrophobic thin films, a roll-to-roll continuous micro-nano imprinting method for the efficient preparation of superhydrophobic polymer films is proposed. A wear-resistant mold roller with hierarchical microstructure is prepared by wire electrical discharge machining (WEDM). The rheological filling model is constructed for revealing the forming mechanism of superhydrophobic polymer films during continuous micro/nano imprinting. The effects of imprinting temperature, rolling speed and the surface texture size of the template on the surface texture formation rate of polymer films are analyzed. The experimental results show that, compared with other process methods, the template processed by WEDM shows excellent wear resistance. Moreover, the optimal micro/nano imprinting parameters are the mold temperature of 190 °C (corresponding film temperature of 85 ± 5 °C), rolling speed of 3 rpm and roller gap of 0.1 mm. The maximum contact angle of the polymer film is 154°. In addition, the superhydrophobic polymer thin film has been proven to have good self-cleaning and anti-icing performance.
为了提高超疏水薄膜的制备效率、质量稳定性和大面积制备能力，提出了一种用于高效制备超疏水聚合物薄膜的卷对卷连续微纳压印方法。通过电火花线切割加工（WEDM）制备了具有分级微观结构的耐磨模具辊。构建流变填充模型以揭示连续微/纳压印过程中超疏水聚合物薄膜的形成机理。分析了压印温度、轧制速度和模板表面纹理尺寸对聚合物薄膜表面纹理形成速率的影响。实验结果表明，与其他工艺方法相比，经电火花线切割加工处理的模板具有优异的耐磨性。此外，最佳的微/纳压印参数为模具温度190℃（相应的薄膜温度为85±5℃）、轧制速度3 rpm和辊间隙0.1 mm。聚合物薄膜的最大接触角为154°。此外，已证明超疏水聚合物薄膜具有良好的自清洁和防冰性能。
Zotero 插件
