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以辣素衍生物N-(5-甲基-3-异丁基-2羟基-苄基)-丙烯酰胺(HMBA)为改性材料,利用表面化学接枝法在聚醚砜(PES)超滤膜表面接枝辣素单体,提高膜的抑菌性。分别研究了单体含量、不同引发剂以及反应时间对接枝反应的影响;并采用全反射红外光谱(ATR-FTIR)对接枝前后聚砜膜进行表征,用原子力显微镜(AFM)观察接枝前后聚砜膜的形貌变化。结果表明,在单体的质量分数为1%,引发剂为过硫酸钾(K2S2O8)、焦亚硫酸钾(K2S2O5),处理时间60 min,接枝反应温度为40℃时,获得最佳接枝效果。接枝改性后的聚砜膜抑菌率达到80%,高于改性前的18%;表面水静态接触角能够降低到60°左右。
Using the chemical modification of surface grafted grafting method in polyethersulfone (PES) ultrasonication by using HMBA as the modified material, Monolayer membrane surface grafting monomer to improve the antimicrobial membrane. The effects of monomer content, initiator and reaction time on the grafting reaction were studied. The ATR-FTIR was used to characterize the polysulfone membranes before and after grafting. The grafting was observed by atomic force microscopy (AFM) Morphology changes of polysulfone membrane before and after. The results showed that the optimum grafting degree was obtained when the mass fraction of monomer was 1%, the initiator was K2S2O8, K2S2O5, the treatment time was 60 min and the grafting reaction temperature was 40 ℃ effect. The antibacterial rate of the modified polysulfone membrane reached 80%, higher than 18% before modification; the static contact angle of surface water could be reduced to about 60 °.