Abstract Enhancing membrane flux, rejection, antimicrobial and chlorine resistance has been the focus of reverse osmosis membrane research. The permselectivity, chlorine resistance and antimicrobial properties of a polyamide (PA) membrane were improved by immobilization of self-synthesized amine functional hydantoin derivative poly(3-allyl-5,5-dimethylhydantoin-co-vinylamine) (P(ADMH-co-VAm)). The chlorine resistance and antimicrobial property of the modified membrane could be regenerated due to the reversible transition between hydantoin and N-halamine. The lab-scale virgin and modified membranes were systematically characterized, and their performances were evaluated and compared with some representative commercial membranes. The modified membrane showed similar permselectivity, but higher and regenerable chlorine resistance and antimicrobial property as compared with the commercial membrane e.g., BW30FR. Next, a pilot-scale 0.4-m wide continuous membrane production process was performed to fabricate membrane element. The permselectivity of the modified element was also improved. During the six “chlorination-sterilization” operation cycles, the element exhibited high antimicrobial property with small permselectivity changes. Thus, both the lab-scale and pilot-scale testing results demonstrated the improved performances of the modified membrane.

中文翻译：

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具有改进的耐氯性和抗菌性能的胺功能反渗透膜的实验室规模和中试规模制造

摘要 提高膜通量、截留率、抗菌性和耐氯性一直是反渗透膜研究的重点。通过固定自合成的胺官能乙内酰脲衍生物聚（3-烯丙基-5,5-二甲基乙内酰脲-共-乙烯基胺）（P（ADMH-co- VAm))。由于乙内酰脲和N-卤胺之间的可逆转变，改性膜的耐氯性和抗菌性可以再生。系统地表征了实验室规模的原始膜和改性膜，并对它们的性能进行了评估，并与一些具有代表性的商业膜进行了比较。改性膜表现出相似的渗透选择性，但与商业膜（例如 BW30FR）相比，具有更高且可再生的耐氯性和抗菌性能。接下来，进行了中试规模的 0.4 米宽连续膜生产工艺，以制造膜元件。改性元素的渗透选择性也得到了提高。在六个“氯化-灭菌”操作周期中，该元件表现出高抗菌性能，而渗透选择性变化很小。因此，实验室规模和中试规模的测试结果都证明了改性膜的性能提高。在六个“氯化-灭菌”操作循环中，该元件表现出高抗菌性能，且渗透选择性变化很小。因此，实验室规模和中试规模的测试结果都证明了改性膜的性能提高。在六个“氯化-灭菌”操作循环中，该元件表现出高抗菌性能，且渗透选择性变化很小。因此，实验室规模和中试规模的测试结果都证明了改性膜的性能提高。