高强度无纺布-静电纺丝复合支撑层正渗透膜的制备及性能

发布时间：2018-03-10 20:01

本文选题：正渗透　切入点：复合支撑层　出处：《环境化学》2017年10期 　论文类型：期刊论文

【摘要】：正渗透(FO)膜技术作为一种低能耗、低污染的膜分离技术,在海水淡化和盐差发电等领域展现出巨大应用潜力.本文以高强度、大孔聚对苯二甲酸乙二醇酯(PET)无纺布和PET静电纺丝膜为复合支撑层,采用间苯二胺(MPD)和均苯三甲酰氯(TMC)为单体,通过界面聚合方法制备了新型高强度纳米纤维FO膜.采用场发射扫描电镜(SEM)、表面接触角测试仪、抗拉测试仪等对制备的复合支撑层膜和FO膜的表面形貌、亲疏水性、拉伸强度等进行了表征.测试结果表明,制备的复合支撑层膜的表面的接触角为121°,拉伸强度为11.4 MPa,相比于传统的静电纺丝膜,复合支撑层膜的拉伸强度得到了大幅的提升.采用正渗透测试系统对FO膜的分离性能进行测试发现,在PRO模式下,以1 mol·L~(-1)NaCl作为汲取液,去离子水作为供给液时,纯水通量达到25.8 LMH,反向盐通量为4.5 g MH.
[Abstract]:Forward osmosis (FO) membrane technology as a low energy consumption, low pollution of the membrane separation technology, shows great potential application in desalination of sea water and salt power and other fields. In this paper, high strength, macroporous polyethylene terephthalate (PET) nonwoven fabric and PET electrospinning membrane as the support layer of composite, the two benzene amine (MPD) and trimesoyl chloride (TMC) as monomer, new high strength nano fiber FO membranes were prepared by interfacial polymerization. By field emission scanning electron microscopy (SEM), surface contact angle tester, tensile tester, surface morphology of the prepared composite membrane support layer and FO film, hydrophilicity, tensile strength were investigated. The test results show that the prepared composite membrane support layer surface contact angle is 121 degrees, the tensile strength is 11.4 MPa, compared to the traditional electrospinning membrane, the tensile strength of the composite membrane support layer has been greatly improved. The positive Penetration test system tests the separation performance of FO membrane. It is found that under PRO mode, with 1 mol. L~ (-1) NaCl as the extraction solution and deionized water as the supply solution, the pure water flux reaches 25.8 LMH, and the reverse salt flux is 4.5 g MH..

【作者单位】：河南师范大学环境学院黄淮水环境污染防治省部共建教育部重点实验室河南省环境污染控制重点实验室;中国科学院烟台海岸带研究所山东省环境工程研究中心中国科学院海岸带环境过程与生态修复重点实验室;
【基金】：国家自然科学基金(21476249) 山东省自然科学基金(2014ZRF01105) 山东省科技发展计划(2014GHY115021) 烟台市科技发展计划重点项目(2015ZH063)资助~~
【分类号】：TQ051.893

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