Kredel Julia, Schmitt Deborah, Schäfer Jan-Lukas, Biesalski Markus, Gallei Markus
Polymer Chemistry, Universität des Saarlandes, Campus Saarbrücken, 66123 Saarbrücken, Germany.
Ernst-Berl Institute of Technical and Macromolecular Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287 Darmstadt, Germany.
Polymers (Basel). 2021 Feb 27;13(5):723. doi: 10.3390/polym13050723.
Functional coatings for application on surfaces are of growing interest. Especially in the textile industry, durable water and oil repellent finishes are of special demand for implementation in the outdoor sector, but also as safety-protection clothes against oil or chemicals. Such oil and chemical repellent textiles can be achieved by coating surfaces with fluoropolymers. As many concerns exist regarding (per)fluorinated polymers due to their high persistence and accumulation capacity in the environment, a durable and resistant coating is essential also during the washing processes of textiles. Within the present study, different strategies are examined for a durable resistant cross-linking of a novel fluoropolymer on the surface of fibers. The monomer 2-((1,1,2-trifluoro-2-(perfluoropropoxy)ethyl)thio)ethyl acrylate, whose fluorinated side-chain is degradable by treatment with ozone, was used for this purpose. The polymers were synthesized via free radical polymerization in emulsion, and different amounts of cross-linking reagents were copolymerized. The final polymer dispersions were applied to cellulose fibers and the cross-linking was induced thermally or by irradiation with UV-light. In order to investigate the cross-linking efficiency, tensile elongation studies were carried out. In addition, multiple washing processes of the fibers was performed and the polymer loss during washing, as well as the effects on oil and water repellency were investigated. The cross-linking strategy paves the way to a durable fluoropolymer-based functional coating and the polymers are expected to provide a promising and sustainable alternative to functional coatings.
用于表面的功能性涂层越来越受到关注。特别是在纺织工业中，耐用的拒水拒油整理剂在户外领域的应用中有着特殊需求，同时也用于制作防油或防化学品的安全防护服。这种拒油拒水的纺织品可以通过用含氟聚合物涂覆表面来实现。由于全氟聚合物在环境中的高持久性和积累能力，人们对其存在诸多担忧，因此在纺织品洗涤过程中，耐用且抗性强的涂层也至关重要。在本研究中，研究了不同策略用于新型含氟聚合物在纤维表面的持久抗性交联。为此使用了单体丙烯酸2 - ((1,1,2 - 三氟 - 2 - (全氟丙氧基)乙基)硫代)乙酯，其氟化侧链可通过臭氧处理降解。聚合物通过乳液自由基聚合合成，并共聚不同量的交联剂。将最终的聚合物分散体应用于纤维素纤维，并通过热诱导或紫外线照射进行交联。为了研究交联效率，进行了拉伸伸长研究。此外，对纤维进行了多次洗涤过程，并研究了洗涤过程中的聚合物损失以及对拒油拒水性能的影响。交联策略为基于含氟聚合物的耐用功能性涂层铺平了道路，预计这些聚合物将为功能性涂层提供一种有前景且可持续的替代品。
