Le Brouster Rachel, Giboz Julien, Nourdine Ali, Tenchine Lionel, Dubelley Florence, Mele Patrice
CT-IPC, 2 Rue Pierre et Marie Curie, 01100 Bourg-en-Bresse, France.
University Grenoble Alpes, University Savoie Mont Blanc, CNRS, Grenoble INP (Institute of Engineering and Management Univ. Grenoble Alpes), LEPMI, 38000 Grenoble, France.
Micromachines (Basel). 2022 Mar 18;13(3):467. doi: 10.3390/mi13030467.
This work aims at developing polymer surfaces with enhanced hydrophobicity by controlling both the surface chemistry and the surface structure. As a first step, a chemical surface modification is achieved by the incorporation of a synthetized tailored fluorinated copolymer, named POISE-a (Polymer prOcessing Interface StabilizEr), in a commercial polystyrene matrix. Then, a complementary physical approach based on micro-structuration of a polymer surface is used. Polystyrene films containing various contents of POISE-a were elaborated by a solvent casting method. The structuration of the films was conducted by replicating a texture from a nickel insert using a hot-embossing technique with optimized processing conditions. The beneficial effect of POISE-a on both the wettability properties and the replication efficiency was evaluated by the water/polymer static contact angle and the quantification of the replication rate, respectively. The use of this tailored additive, even at low percentages (i.e., 1 wt.%), associated with the structuration of the PS surface, improves both the hydrophobicity of polystyrene and the robustness of the replication process.
这项工作旨在通过控制表面化学性质和表面结构来开发具有增强疏水性的聚合物表面。第一步，通过将一种合成的定制氟化共聚物（名为POISE-a，即聚合物加工界面稳定剂）引入商业聚苯乙烯基体中，实现化学表面改性。然后，采用一种基于聚合物表面微结构化的补充物理方法。通过溶剂浇铸法制备了含有不同含量POISE-a的聚苯乙烯薄膜。使用热压印技术在优化的加工条件下复制镍插件的纹理，对薄膜进行结构化处理。分别通过水/聚合物静态接触角和复制率的量化来评估POISE-a对润湿性和复制效率的有益影响。即使使用低百分比（即1 wt.%）的这种定制添加剂，并结合聚苯乙烯表面的结构化处理，也能提高聚苯乙烯的疏水性和复制过程的稳健性。
