Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education; National Base for International Science and Technology Cooperation in Textiles and Consumer-Goods Chemistry , Zhejiang Sci-Tech University , 310018 Hangzhou , China.
Technische Universität München, Physik-Department , Lehrstuhl für Funktionelle Materialien , James-Franck-Strasse 1 , 85748 Garching , Germany.
ACS Appl Mater Interfaces. 2019 Feb 6;11(5):5414-5426. doi: 10.1021/acsami.8b19908. Epub 2019 Jan 28.
Enhanced capabilities of stain removal and comfort control are simultaneously achieved by the light and thermo dual-responsive copolymer poly(triethylene glycol methyl ether methacrylate- co-ethylene glycol methacrylate- co-acrylamide azobenzene) (P(MEOMA- co-EGMA- co-AAAB)) cross-linked on cotton fabrics. P(MEOMA- co-EGMA- co-AAAB) is synthesized by sequential atom transfer radical polymerization with a molar ratio of 8 (MEOMA):1 (EGMA):1 (AAAB). The MEOMA units induce a thermoresponsive behavior to the copolymer. The hydrophilicity of the copolymer films can be further improved by the light-induced trans- cis isomerization of the AAAB units with UV radiation. The copolymer is facilely immobilized onto cotton fabrics with 1,2,3,4-butane tetracarboxylic acid as cross-linker. Due to the immobilization of P(MEOMA- co-EGMA- co-AAAB), the hydrophilicity of the fabric surface is increased under UV radiation. Therefore, by simply installing a UV light source in the washing machine, better capability of stain removal is realized for the cross-linked cotton fabrics. It can prominently reduce the consumption of energy, water, and surfactants in laundry. In addition, the trans-AAAB units of the copolymer cause the cross-linked P(MEOMA- co-EGMA- co-AAAB) layer to be more hydrophobic under ambient conditions. Hence, the copolymer can more easily collapse and form a porous structure on the fabrics. Thus, the air permeability of cotton fabrics cross-linked with P(MEOMA- co-EGMA- co-AAAB) is enhanced by 13% at human body temperature as compared to P(MEOMA- co-EGMA), giving improved comfort control during daily wear.
通过将光和温双重响应性共聚物聚（三乙二醇甲基醚甲基丙烯酸酯-共-乙二醇甲基丙烯酸酯-共-丙烯酰胺偶氮苯）（P(MEOMA-co-EGMA-co-AAAB)）交联到棉织物上，同时实现了去污能力和舒适控制性能的增强。P(MEOMA-co-EGMA-co-AAAB)是通过顺序原子转移自由基聚合合成的，摩尔比为 8（MEOMA）：1（EGMA）：1（AAAB）。MEOMA 单元使共聚物具有温敏行为。共聚物薄膜的亲水性可以通过 AAAB 单元的光诱导顺-反异构化并用 UV 辐射进一步提高。共聚物可以很容易地与 1,2,3,4-丁烷四羧酸作为交联剂固定在棉织物上。由于 P(MEOMA-co-EGMA-co-AAAB)的固定化，在 UV 辐射下，织物表面的亲水性增加。因此，只需在洗衣机中安装一个 UV 光源，就可以实现交联棉织物更好的去污能力。它可以显著减少洗衣过程中能源、水和表面活性剂的消耗。此外，共聚物中的反式-AAAB 单元使环境条件下的交联 P(MEOMA-co-EGMA-co-AAAB)层更加疏水。因此，共聚物更容易在织物上坍塌并形成多孔结构。因此，与 P(MEOMA-co-EGMA)相比，交联 P(MEOMA-co-EGMA-co-AAAB)的棉织物的空气透过率在人体温度下提高了 13%，从而在日常穿着时提供了更好的舒适控制。
