Cellulose acetate based membranes are used for water desalination. Cellulose diacetate (CDA) was prepared from cellulose powder. Reverse osmosis (RO) membranes were prepared on polyester sheets using CDA based through phase inversion technique. The structural, morphological and hydrophilic properties of the prepared membranes were characterized by Fourier transform infrared spectroscopy (FTIR), Nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), and contact angle measurements. The FTIR and NMR revealed the presence of the carbonyl groups and degree of substitution (DS) in CDA. Modified membranes by Grafted to improve the performance and the anti-biofouling properties of cellulose acetate reverse osmosis (RO) membranes. The anti-biofouling properties were studied by measurements of static protein adsorption. The effect of grafting the membrane on the salt rejection and water flux was studied using a cross flow RO unit. The results indicated that 15 wt% of 2-acrylamido-2-methylpropanesulfonic acid (AMPS)Grafted membranes have lower adsorption of protein and microbes, in addition to increased salt rejection to 99.24 % and water flux to 17.12 l/m² h.

基于乙酸纤维素的膜用于水脱盐。由纤维素粉末制备二乙酸纤维素（CDA）。通过相转化技术，使用CDA在聚酯片材上制备反渗透（RO）膜。通过傅立叶变换红外光谱（FTIR），核磁共振（NMR），扫描电子显微镜（SEM）和接触角测量来表征所制备膜的结构，形态和亲水特性。FTIR和NMR揭示了CDA中羰基的存在和取代度（DS）。嫁接改性膜可提高醋酸纤维素反渗透（RO）膜的性能和抗生物结垢性能。通过测量静态蛋白质吸附来研究其抗生物结垢特性。使用错流反渗透装置研究了接枝膜对除盐和水通量的影响。结果表明，15 wt％的2-丙烯酰胺基-2-甲基丙烷磺酸（AMPS）接枝膜对蛋白质和微生物的吸附性更低，除盐吸收率提高至99.24％和水通量达到17.12 l / m²小时