Abstract Fluorinated PTFOA-b-PS(2 h) and PTFOA-b-PS(4 h) block copolymers with controllable molecular weights were synthesised by atom transfer radical polymerisation (ATRP) and used to form microporous and microspherical coatings on fibres using the static breath figure (BF) method. The structures and properties of the coatings were examined by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and water contact angle (WCA) analysis. The fibre surface was complete coated with a microporous polymer in a water atmosphere using a 20 mg/mL PTFOA-b-PS(4 h) solution in CS2 as the finishing agent. The as-prepared fabric showed excellent hydrophobicity, with a WCA of 147.2 ± 1.6°. On the other hand, the fibre surfaces were coated with excellent polymer microspheres in a methanolic atmosphere using a 10 mg/mL PTFOA-b-PS(2 h) solution in THF; the WCA of the microsphere-coated fabric was 151.1 ± 0.1°. The WCA and EDS results reveal that synergism between the high roughness and low surface energy of the microspherical coating endows the fabric with super-hydrophobicity. At the same time, silanised block copolymers were synthesised by the silanisation of PTFOA-b-PS(2 h) and PTFOA-b-PS(4 h) and used to prepare microporous and microspherical coatings on fabrics. SEM showed that the silanised-PTFOA-b-PS(4 h)-coated fabric has a uniform and completely microporous morphology. A comparative study showed that both PTFOA-b-PS(2 h) and silanised-PTFOA-b-PS(2 h) form microspheres on fibre surfaces and that the latter exhibited hierarchical micro-nanostructures; the surface of fabric coated with this silanised polymer is super-hydrophobic, with a WCA of 152.2 ± 2.3°. Elemental distributions were determined by EDS, which revealed that the silanised-PTFOA-b-PS(2 h) microspheres contain more surface-migrating fluoropolymer segments, which produce hierarchical micro-nanostructures due to micro-phase separation. The air permeabilities and hardnesses of the silanised polymer-coated fabrics were also studied.

中文翻译：

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使用静态呼吸图法轻松制备由具有微孔或微球涂层的纤维组成的超疏水织物

摘要 通过原子转移自由基聚合 (ATRP) 合成了分子量可控的氟化 PTFOA-b-PS(2 h) 和 PTFOA-b-PS(4 h) 嵌段共聚物，并利用静电作用在纤维上形成微孔和微球涂层。呼吸图（BF）法。通过扫描电子显微镜 (SEM)、能量色散 X 射线光谱 (EDS) 和水接触角 (WCA) 分析检查涂层的结构和性能。使用 20 mg/mL PTFOA-b-PS(4 h) 在 CS2 中的溶液作为整理剂，在水气氛中用微孔聚合物完全涂覆纤维表面。所制备的织物显示出优异的疏水性，WCA 为 147.2 ± 1.6°。另一方面，使用 10 mg/mL PTFOA-b-PS(2 h) 的 THF 溶液，在甲醇气氛中用优异的聚合物微球涂覆纤维表面；微球涂层织物的WCA为151.1±0.1°。WCA 和 EDS 结果表明，微球涂层的高粗糙度和低表面能之间的协同作用赋予织物超疏水性。同时，通过PTFOA-b-PS(2 h)和PTFOA-b-PS(4 h)的硅烷化合成了硅烷化嵌段共聚物，用于在织物上制备微孔和微球涂层。SEM 显示硅烷化-PTFOA-b-PS(4 h) 涂层织物具有均匀且完全微孔的形态。一项对比研究表明，PTFOA-b-PS(2 h) 和硅烷化-PTFOA-b-PS(2 h) 在纤维表面形成微球，后者表现出分层的微纳米结构；涂有这种硅烷化聚合物的织物表面具有超疏水性，WCA 为 152.2 ± 2.3°。元素分布由 EDS 确定，这表明硅烷化-PTFOA-b-PS(2 h) 微球包含更多表面迁移的含氟聚合物链段，由于微相分离产生分层微纳米结构。还研究了硅烷化聚合物涂层织物的透气性和硬度。这表明硅烷化-PTFOA-b-PS(2 h) 微球含有更多表面迁移的含氟聚合物链段，由于微相分离，这些链段会产生分级微纳米结构。还研究了硅烷化聚合物涂层织物的透气性和硬度。这表明硅烷化-PTFOA-b-PS(2 h) 微球含有更多表面迁移的含氟聚合物链段，由于微相分离，这些链段会产生分级微纳米结构。还研究了硅烷化聚合物涂层织物的透气性和硬度。