文章摘要
PVDF-DCOIT复合中空纤维膜的制备与抗污染性能研究
Preparation and antifouing performance of novel PVDF-DCOIT composite hollow fiber membrane
投稿时间:2019-04-02  修订日期:2019-05-05
DOI:
中文关键词: 膜生物反应器  PVDF中空纤维膜  DCOIT  抗膜污染。
英文关键词: MBR  PVDF hollow fiber membrane  DCOIT  Antifouling performance.
基金项目:国家自然科学基金资助项目(21677026),中央高校基础科研业务费(DUT17LAB15),高等学校学科创新引智计划资助项目(B13012)
作者单位E-mail
曹宏杰 大连理工大学 hongjie_cao2018@163.com 
乔森 大连理工大学 qiaosen@dlut.edu.cn 
周集体 大连理工大学  
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中文摘要:
      本文研究的是有机杀菌剂4,5-二氯-N-辛基-4-异噻唑啉-3-酮(DCOIT)以适当浓度共混于聚偏氟乙烯(PVDF)中来制备一种新型的抗污染膜。实验表明,DCOIT含量为3wt%的改性膜具有最佳性能。改性膜在亲水性和纯水通量的性能分别提升了22.9%和64.6%。SEM、EDS和AFM表征分析也反映出更好地的指状孔构和更加光滑的膜表面,这些因素都有利于膜污染的缓解。在抗膜污染实验中,添加DCOIT后牛血清白蛋白、海藻酸钠和腐殖酸对膜表面的污染降低了26%、19%和74%;而在厌氧污泥中改性膜的通量恢复效率也比PVDF膜提高了39%。
英文摘要:
      In the work, organic biocide 4,5-dichloro-2-n-octyl-3-(2H)-isothiazolin-3-one (DCOIT) is physically blended with polyvinylidene fluoride (PVDF) in the proper concentration to explore the preparation of antifouling membrane. The results showed that the composite membrane with 3wt% DCOIT has the optimum comprehensive performance. The hydrophilcity and pure water flux of the modified membrane were improved by 22.9% and 64.6%, respectively. The characteristics of SEM, EDS and AFM also showed that the modified membrane had better morphologies and smoother surface, which is beneficial to the alleviation of membrane fouling. In the antifouling experiments, the membrane fouling of modified membranes in bovine serum albumin (BSA), sodium alginate (SA) and humic acid (SA) was reduced by 26%, 19% and 74%. Moreover, the flux recovery efficiency of modified membranes in anaerobic sludges was also increased by 39%.
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