两步法制备两性离子陶瓷复合膜及抗污染研究

发布时间：2018-06-23 11:46

本文选题：陶瓷膜 + 两性离子　；参考：《膜科学与技术》2017年03期

【摘要】：为了减弱蛋白与陶瓷膜表面的作用力,采用两步表面接枝法,首先采用硅烷化反应将叔胺氢给体(N,N-二甲基-3-氨丙基)三甲氧基硅烷(DMAPS)偶联到含有羟基的陶瓷膜表面,再引发2-溴乙基磺酸钠(SBTS)在膜表面发生季铵化反应,制备磺酸型两性离子陶瓷复合膜(SBTS-c-DMAPS-g-Al_2O_3).结果表明:红外光谱测试显示,与未改性膜表面相比,改性膜表面于1 065cm~(-1)和1 200cm~(-1)处分别出现C—N峰与SO3-峰.接触角测试结果表明,膜的亲水性得到改善,膜表面水滴接触角由36°减小到21°,纯水通量增大20%,可间接表明材料表面成功接枝上两性离子.牛血清白蛋白(BSA)的动态过滤实验表明,改性膜对BSA溶液渗透率比未改性膜的BSA溶液渗透率高30%,改性膜被污染后,再用纯水清洗后的纯水通量恢复率达到90%,而未改性膜被污染后,再用纯水清洗后的纯水通量恢复率只有26%.这是因为两性离子陶瓷复合膜具有易清洗性能.
[Abstract]:In order to reduce the interaction between protein and ceramic membrane surface, a two-step surface grafting method was used to couple trimethoxy silane (DMAPS) to the surface of ceramic membrane containing hydroxyl groups by silanization reaction. Sodium 2-bromoethyl sulfonate (SBTS) was reinitiated by quaternary ammonium reaction on the membrane surface to prepare the sulfonic acid amphoteric ceramic composite membrane (SBTS-c-DMAPS-g-Al _ 2O _ 3). The results showed that the C-N and so _ 3- peaks were observed at 1 065 cm ~ (-1) and 1200 cm ~ (-1), respectively, compared with the surface of unmodified films. The results of contact angle test showed that the hydrophilicity of the membrane was improved, the contact angle of water droplets on the membrane surface was reduced from 36 掳to 21 掳, and the pure water flux increased by 20%, which can indirectly indicate that the amphoteric ions on the surface of the membrane were grafted successfully. The dynamic filtration experiment of bovine serum albumin (BSA) showed that the permeability of modified membrane to BSA solution was 30% higher than that of unmodified BSA solution. After the modified membrane was contaminated, the recovery rate of pure water flux after washing with pure water reached 90%, while that of unmodified membrane was polluted. The recovery rate of pure water flux after washing with pure water is only 26%. This is because the amphoteric ceramic composite membrane is easy to clean.
【作者单位】：南京工业大学化工学院材料化学工程国家重点实验室;
【基金】：国家自然科学基金(91534108,21506093) 江苏省自然科学基金(BK20150947)
【分类号】：TQ051.893

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