摘要
研究了不同聚砜(PSF)底膜溶剂N,N-二甲基甲酰胺(DMF)浸泡时间、氧化石墨烯(GO)添加量对改性GO纳米杂化反渗透膜(GO-RO膜)性能的影响。结果表明,底膜在40℃、DMF质量分数30%的水溶液中浸泡50 min后,所得GO-RO膜具有较好的分离性能,水通量为85 L/(m~2·h),截留率为99.1%,水通量较底膜未浸泡的GO-RO膜提高近75%。使用浸泡50 min的底膜所制备的GO-RO膜在添加GO的质量分数为0.05%时,膜表面GO团聚较少,性能较为优良,水通量为80 L/(m~2·h),截留率为99.1%,水通量较空白对照组提高近100%。原子力显微镜分析显示,随着GO添加量的增加,膜表面粗糙度不断的增加;X射线光电子能谱仪分析显示,随着GO添加量的增加,膜分离层中GO含量也不断的增加。
The effects of different soaking time of polysulfone(PSF) base membrane in N,N-dimethylformamide(DMF) solvent and graphene oxide(GO)dosage on the properties of modified GO nano hybrid reverse osmosis(GO-RO) membrane were studied. The results showed that, the GO-RO membrane had good separation performance after soaking for 50 min in 40 ℃ and aqueous solution with DMF mass fraction of 30%, the water flux was 85 L/(m~2·h)and the rejection rate was 99.1%, the water flux was nearly 75% higher than the GO-RO membrane with unsoaked base membrane. When the mass fraction of GO was 0.05%, the GO-RO membrane prepared by soaking for 50 min had less GO agglomeration on the surface of the membrane, and the performance was better, the water flux was 80 L/(m~2·h), and the rejection rate was 99.1%, the water flux increased by nearly 100% compared to the blank control group. AFM analysis showed that the surface roughness of the membrane increased with the increase of GO addition; XPS analysis showed that the GO content in the separation layer of the membrane also increased with the increase of GO addition.
引文
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