以聚醚砜（PES）为膜材料，羧基化多壁碳纳米管（MWCNT）为添加剂，通过相转化法制备碳纳米管/聚醚砜复合纳滤膜，并将其用于染料的去除和花青素的浓缩。考察了不同操作压力、染料浓度和溶液pH条件下膜对染料分离性能的影响。通过改变花青素溶液的温度和pH找到合适的浓缩条件。纯水通量和水接触角测试结果表明，羧基化多壁碳纳米管提高了膜的亲水性，当碳纳米管质量分数为0.04%时，膜的分离性能最佳。

Carbon nanotube/polyethersulfone composite nano-filtration membranes are prepared through phase inversion method by using polyethersulfone (PES) as membrane material and carboxylated multi-walled carbon nanotubes as additive.The sample is used to remove dyes and concentrate anthocyanin.The membrane's separation performance to dyes is investigated under different operating pressures,dye concentrations and solution pH values.Suitable concentration conditions are found by changing the temperature and pH value of anthocyanin solution.The results from pure water flux and water contact angle measurements show that carboxylated multi-walled carbon nanotubes have improved the hydrophilicity of the membranes.The separation performance of the membrane is the best when the content of carbon nanotubes is 0.04 wt%.

陈可佳(1994-),女,硕士研究生,主要从事高分子分离膜研究,ckj1277314474@163.com