Chemical Process Engineering, RWTH Aachen University, Turmstrasse 46, 52064 Aachen (Germany) http://www.avt.rwth-aachen.de.
Angew Chem Int Ed Engl. 2014 May 26;53(22):5706-10. doi: 10.1002/anie.201400316. Epub 2014 Apr 16.
In the present work, we investigate the potential of aqueous polymer microgels in membrane technology, especially for filtration applications. The poly(N-vinylcaprolactam)-based microgels exhibit thermoresponsive behavior and were employed to coat hollow-fiber membranes used for micro- and ultrafiltration. We discuss the preparation of microgel-modified membranes (by "inside-out" as well as "outside-in" filtration in dead-end mode). The clean-water permeability and stability of these membranes was studied not only as a function of time, but also of temperature. The microgel-modified membranes exhibit a reversible thermoresponsive behavior whereby both the resistance and the retention increased with decreasing temperature.
在本工作中，我们研究了水基聚合物微凝胶在膜技术中的潜力，特别是在过滤应用方面。基于聚（N-乙烯基己内酰胺）的微凝胶表现出温敏行为，并被用于涂覆中空纤维膜，用于微滤和超滤。我们讨论了通过死端模式的“内向外”和“外向内”过滤来制备微凝胶改性膜。不仅研究了这些膜的清水透过率和稳定性随时间的变化，还研究了随温度的变化。微凝胶改性膜表现出可逆的温敏行为，即阻力和保留率随温度的降低而增加。
