Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany.
The Second Clinical Division of Peking University School and Hospital of Stomatology, Anlilu 66, 100101 Beijing, China.
Langmuir. 2022 Oct 25;38(42):12961-12967. doi: 10.1021/acs.langmuir.2c02248. Epub 2022 Oct 14.
The attachment of bio-fluids to surfaces promotes the transmission of diseases. Superhydrophobic textiles may offer significant advantages for reducing the adhesion of bio-fluids. However, they have not yet found widespread use because dried remnants adhere strongly and have poor mechanical or chemical robustness. In addition, with the massive use of polymer textiles, features such as fire and heat resistance can reduce the injuries and losses suffered by people in a fire accident. We developed a superhydrophobic textile covered with a hybrid coating of titanium dioxide and polydimethylsiloxane (TiO/PDMS). Such a textile exhibits low adhesion to not only bio-fluids but also dry blood. Compared to a hydrophilic textile, the peeling force of the coated textile on dried blood is 20 times lower. The textile's superhydrophobicity survives severe treatment by sandpaper (400 mesh) at high pressure (8 kPa) even if some of its microstructures break. Furthermore, the textile shows excellent heat resistance (350 °C) and flame-retardant properties as compared to those of the untreated textile. These benefits can greatly inhibit the flame spread and reduce severe burns caused by polymer textiles adhering to the skin when melted at high temperatures.
生物液滴附着在表面上会促进疾病的传播。超疏水纺织品在减少生物液滴附着方面可能具有显著优势。然而，它们尚未得到广泛应用，因为干燥的残留物会强烈附着，且机械或化学稳定性较差。此外，随着聚合物纺织品的大量使用，防火和耐热等特性可以降低火灾事故中人员的受伤和损失。我们开发了一种涂覆有二氧化钛和聚二甲基硅氧烷（TiO/PDMS）混合涂层的超疏水纺织品。这种纺织品不仅对生物液滴，而且对干燥的血液也表现出低附着性。与亲水纺织品相比，涂覆有涂层的纺织品对干燥血液的剥离力低 20 倍。即使部分微结构破裂，该纺织品的超疏水性也能在高压（8kPa）下用 400 目砂纸进行的严重处理下幸存下来。此外，与未处理的纺织品相比，该纺织品还表现出优异的耐热性（350°C）和阻燃性能。这些好处可以极大地抑制火焰蔓延，并减少聚合物纺织品在高温下融化时附着在皮肤上造成的严重烧伤。
