MoS_(2)/BN表面涂覆对PES超滤膜抗污染性能的提升  

Fabrication of Two-Dimensional MoS_(2)/BN Nanomaterials Coated Membrane for Improved Anti-Fouling Performance

作　　者：文欣 海玉琰 何灿 马瑞 熊日华 刘淑琴[2] WEN Xin;HAI Yuyan;HE Can;MA Rui;XIONG Rihua;LIU Shuqin(National Institute of Clean-and-Low-Carbon Energy,Beijing 102211,China;China University of Mining&Technology(Beijing),Beijing 100083,China)

机构地区：[1]北京低碳清洁能源研究院,北京102211 [2]中国矿业大学(北京),北京100083

出　　处：《水处理技术》2025年第2期79-84,共6页Technology of Water Treatment

基　　金：国家能源集团项目(GJNY-21-90,CF9300200024)。

摘　　要：膜污染是限制膜技术发展的主要问题。采用表面涂覆法,在超滤膜表面分别涂覆二硫化钼(MoS_(2))和氮化硼(BN)纳米颗粒,制备抗污染超滤膜,通过深入分析MoS_(2)/BN的电负性,形貌特征以及层间距等特性,阐明其在PES超滤膜表面的抗污机理;以牛血清蛋白(BSA)为典型有机物,对抗污染超滤膜PES-MoS_(2)/BN的渗透通量,污染恢复率以及污染率进行测定,发现MoS_(2)和BN纳米颗粒均能够提高膜的抗污染性能;相对于PES-BN,PES-MoS_(2)展现出了较优异的渗透通量和抗污染性能,这与其相对开阔的层间纳米通道、较大的电负性以及涂覆后膜的形貌有关;对于牛血清蛋白污染,最佳MoS_(2)涂覆量10 g/m2条件下,PES-MoS_(2)改性膜的污染恢复率由87.10%提升至96.77%,总污染率由24.26%下降至6.21%。结果表明,膜表面纳米层由于其物理屏障和静电排斥作用,可以有效地减少膜污染,提高膜的抗污染性能。Scaling is a major challenge in ultrafiltration membrane applications.In this study,anti-pollution ultrafiltration membranes were fabricated by coating molybdenum disulfide(MoS_(2))or boron nitride(BN)nanoparticles onto membrane surfaces via a surface coating technique.The antifouling mechanism of PES-MoS_(2)/BN membranes was investigated by analyzing their electronegativity,morphology,and interlayer spacing.Bovine serum albumin(BSA)was employed as a model organic foulant to evaluate the permeation flux,flux recovery rate,and fouling rate of PES-MoS_(2)/BN membranes,revealing that MoS_(2)and BN nanoparticles both enhanced membrane antifouling performance.Compared with PES-BN,PES-MoS_(2)exhibited superior permeation flux and antifouling properties due to its more open interlayer nanochannels,higher electronegativity,and favorable coated membrane morphology.For BSA fouling,when the optimal MoS_(2)coating was 10 g/m²,the flux recovery rate of the PES-MoS_(2)membrane increased from 87.10%to 96.77%,and the total contamination rate decreased from 24.26%to 6.21%.These findings indicate that the nano-layer on the membrane surface can effectively reduce fouling and enhance antifouling performance via physical barriers and electrostatic repulsion.

关 键 词：超滤膜 纳米颗粒 表面涂覆 抗污染 牛血清蛋白 

分 类 号：TQ028.8[化学工程]