纳米纤维素原位植入改性聚醚砜超滤膜的性能研究  

The performance of PES ultrafiltration membrane modified by in-situ embedment approach with CNW

作　　者：王璇 刘振[1] 苗娇娇 贾园[1] 宋立美[1] WANG Xuan;LIU Zhen;MIAO Jiaojiao;JIA Yuan;SONG Limei(School of Chemical Engineering,Xi’an University,Xi’an 710065,China;School of Life Science,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]西安文理学院化学工程学院,西安710065 [2]西北工业大学生命科学学院,西安710072

出　　处：《功能材料》2020年第7期7104-7109,共6页Journal of Functional Materials

基　　金：陕西省教育厅资助项目(19JK0740);陕西省科技厅资助项目(2019JQ893)。

摘　　要：采用原位植入法将纳米纤维素(CNW)沉积到聚醚砜(PES)超滤膜的表面,研究凝固浴中不同纳米纤维素的浓度对聚醚砜超滤膜性能的影响,分别用扫描电子显微镜、接触角测定仪等对改性膜性能进行评价。结果表明,CNW能够良好的植入聚醚砜超滤膜表面,改变沉淀浴浓度可以获得不同CNW覆盖率的聚醚砜膜表面,改性膜断面和表面形貌也获得不同程度的改善。改性膜的亲水性随CNW浓度的提高而不断增强,当CNW浓度为0.4%(质量分数)时,此时膜拥有最大的纯水通量333 L/(m^2·h),未改性的纯膜只有192 L/(m^2·h)。膜蛋白抗污染实验中通量恢复率的结果表明,改性膜的抗污染能力明显提高。本研究为利用先进纳米材料制备高性能纳米复合膜提供了新的思路和方法。In this study,polyethersulfone(PES)ultrafiltration membranes were surface modified by in-situ embedment approach with cellulose whiskers(CNW).The effect of CNW concentration in the water(coagulation)bath on the properties of PES membranes was investigated.The membranes were characterized and evaluated by scanning electron microscope observation,contact angle measurement and so on.The results showed that CNW were successfully embedded onto the membrane surface.The coverage ratio of CNW on membrane surface were obtained by changing CNW concentration in water bath.The surface and fracture morphology were also improved to some extent.A membrane was more hydrophilic when the CNW concentration was higher.The membrane exhibited the highest pure water flux around 333 L/(m^2·h)when the CNW concentration was 0.4%(in mass),while the unmodified pristine PES membrane exhibited around 192 L/(m^2·h).In the experiment of protein antifouling,the results of FRR indicated that the fouling-resistance of modified membrane was greatly improved.This study provided valuable insight into the preparation of high-performance nanocomposite membranes for water treatment by incorporating advanced nanomaterials with polymers.

关 键 词：聚醚砜 纳米纤维素 原位植入 超滤膜 抗污染 

分 类 号：TQ35[化学工程]