PREPARATION OF TEMPERATURE-SENSITIVE MEMBRANES BY GRAFT-POLYMERIZATION ONTO A POROUS MEMBRANE
PREPARATION OF TEMPERATURE-SENSITIVE MEMBRANES BY GRAFT-POLYMERIZATION ONTO A POROUS MEMBRANE
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DOI：
10.1016/s0376-7388(00)82330-3
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发表时间：
1991-01-01
影响因子：
9.5
通讯作者：
IKADA, Y
中科院分区：
文献类型：
--
作者：
IWATA, H;OODATE, M;IKADA, Y
通过将聚（N - 异丙基丙烯酰胺）（polyIPAAm）及其共聚物接枝到多孔聚偏氟乙烯膜上制备了温敏膜。聚 - IPAAm可溶于水，但具有约31 - 33℃的低临界溶解温度（LCST）。聚IPAAm接枝膜在LCST上下的温度之间，水过滤速率变化超过10倍，这反映了聚 - IPAAm的剧烈构象变化。温度敏感性是可逆且可重复的。接枝链很可能充当温度传感器以及调节过滤特性的阀门。通过将IPAAm分别与亲水性单体（如丙烯酰胺）或疏水性单体（如甲基丙烯酸正丁酯）共聚，可使过滤速率急剧变化的温度区域向更高或更低的温度移动。所有温敏膜的尺寸保持不变，并且能够对温度变化快速响应。
Temperature-sensitive membranes were prepared by grafting of poly(N-isopropylacrylamide) (polyIPAAm) and its copolymers onto a porous poly(vinylidene fluoride) membrane. Poly-IPAAm is soluble in water but has a lower critical solution temperature (LCST) around 31-33-degrees-C. The water filtration rate of the polyIPAAm grafted membrane varied more than 10-fold between temperatures above and below the LCST, reflecting the drastic configuration change of poly-IPAAm. The temperature sensitivity was reversible and reproducible. It is likely that the grafted chains acted as a sensor of temperature and as a valve to regulate filtration characteristics. The temperature region where the filtration rate sharply changed could be shifted to higher or lower temperature by copolymerizing IPAAm with a hydrophilic monomer, such as acrylamide, or a hydrophobic monomer, such as n-butyl methacrylate, respectively. All of the temperature-sensitive membranes remained constant in size and could respond quickly to temperature changes.