单宁酸/二乙烯三胺五乙酸酯化层修饰的聚酰胺纳滤膜的制备及性能研究  

A study on the preparation and performance of polyamide nanofiltration membranes modified with tannic acid/diethylenetriamine pentaacetic acid esterification layer

作　　者：朱德良 何家劲 唐雨欣 李江南[1,2] 姬晓钰 唐红艳[1,2] ZHU Deliang;HE Jiajin;TANG Yuxin;LI Jiangnan;JI Xiaoyu;TANG Hongyan(Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology,Zhejiang Sci-Tech University,Hangzhou 310018,China;National Engineering Lab for Textile Fiber Materials and Processing Technology,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江理工大学浙江省纤维材料和加工技术研究重点实验室,杭州310018 [2]浙江理工大学纺织纤维材料与加工技术国家地方联合工程实验室,杭州310018

出　　处：《浙江理工大学学报(自然科学版)》2025年第2期166-174,共9页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：浙江省自然科学基金项目(LY19B060016)。

摘　　要：为了提高纳滤膜的抗污染性能和分离性能,以亲水聚偏氟乙烯(Polyvinylidene fluoride,PVDF)微孔膜作为基膜,在基膜表面通过单宁酸(Tannic acid,TA)和二乙烯三胺五乙酸(Diethylenetriamine pentaacetic acid,DTPA)交联形成酯化层,再通过均苯三甲酰氯(Trimesoyl chloride,TMC)和聚乙烯亚胺(Polyethyleneimine,PEI)界面聚合反应制备单宁酸/二乙烯三胺五乙酸酯化层修饰的聚酰胺纳滤膜(TA/DTPA/PA纳滤膜)。分别利用扫描电子显微镜、红外光谱仪和视频水接触角仪表征TA/DTPA/PA纳滤膜的表面形貌、化学结构和亲水性。通过优化制备条件,制得具有良好抗污染性能和分离性能的TA/DTPA/PA纳滤膜。结果表明:通过酯化层的修饰,TA/DTPA/PA纳滤膜表面变得光滑且亲水。当TA质量分数为1.00%,DTPA质量分数为0.75%,反应时间为15 min时,TA/DTPA/PA纳滤膜对MgSO_(4)的分离性能最佳,截留率为92.6%,水通量为31.6 L/(m^(2)·h);与对照膜(PA纳滤膜)相比,TA/DTPA/PA纳滤膜截留率提升5.1%,水通量提升36.8%。TA/DTPA/PA纳滤膜对牛血清白蛋白(Bovine serum albumin,BSA)的通量恢复率(Flux recovery rate,FRR)达到了94.9%;与PA纳滤膜相比,TA/DTPA/PA纳滤膜的FRR提升12.4%。该研究制备的TA/DTPA/PA纳滤膜具有良好的抗污染性能和分离性能,并克服了传统抗污染改性方法对渗透性能带来的负面影响,在污水处理应用中具有一定的潜在优势。To enhance the antifouling properties and separation performance of nanofiltration membranes,hydrophilic polyvinylidene fluoride(PVDF)microporous membranes were utilized as the substrate,and tannic acid(TA)and diethylenetriamine pentaacetic acid(DTPA)esterification layer was crosslinked on the surface of the substrate.Subsequently,the polyamide nanofiltration membranes modified with tannic acid/diethylenetriamine pentaacetic acid esterification layer(TA/DTPA/PA nanofiltration membranes)were fabricated through the interfacial polymerization of trimesoyl chloride(TMC)and polyethyleneimine(PEI).The surface morphology chemical structure, and hydrophilicity of the TA/DTPA/PA nanofiltration membranes were analyzed by usingscanning electron microscope, Fourier-transform infrared spectroscopy, and video water contact angle meter. TheTA/DTPA/PA nanofiltration membranes with good antifouling properties and separation performance wereobtained by optimizing the preparation conditions. The results indicated that the surfaces of the TA/DTPA/PAnanofiltration membranes were smoothed and made hydrophilic through esterification modification. When the massfraction of TA was 1.00%, the mass fraction of DTPA was 0.75%, and the reaction time was 15 min, theseparation performance of the TA/DTPA/PA nanofiltration membrane MgSO_(4) was found to be optimal, with arejection rate of 92.6% and a water flux of 31.6 L/(m^(2)·h). Compared to the control membrane (PAnanofiltration membrane), the rejection rate was increased by 5.1% and the water flux was enhanced by 36.8%.The flux recovery rate (FRR) of the TA/DTPA/PA nanofiltration membrane for bovine serum albumin (BSA)was achieved at 94.9%. Compared to the PA nanofiltration membrane, the FRR was increased by 12.4%. Theseresults indicate that the TA/DTPA/PA nanofiltration membranes possess good antifouling properties andseparation performance, overcoming the negative impact on permeation performance caused by traditionalantifouling modification methods, and demonstrating potential advantages

关 键 词：纳滤膜 界面聚合 酯化层 抗污染 分离性能 亲水性 

分 类 号：TQ028.8[化学工程]