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首页> 外文期刊>RSC Advances >Preparation and characterization of a novel positively charged composite hollow fiber nanofiltration membrane based on chitosan lactate
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Preparation and characterization of a novel positively charged composite hollow fiber nanofiltration membrane based on chitosan lactate

机译：基于壳聚糖乳酸的新型带正电荷复合中空纤维纳破膜的制备与表征

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摘要

A positively charged composite hollow fiber nanofiltration (NF) membrane was prepared via interfacial polymerization (IP) between chitosan lactate (CL) and trimesoyl chloride (TMC) on a polyether sulfone (PES) hollow fiber ultrafiltration (UF) membrane. The chemical structure and the morphologies of the resultant NF membranes were characterized with attenuated total reflectance-infrared spectroscopy (ATR-IR) and scanning electron microscopy (SEM). The rejection of NF membrane for different inorganic salt aqueous solutions followed the order: MgCl2 ZnCl2 MgSO4 NaCl Na2SO4. It suggested that this novel kind of composite hollow fiber NF membrane is positively charged. The molecular weight cut-off (MWCO) was obtained through the rejection of polyethylene glycol (PEG) solutions with different molecular weights (M-w). The effect of monomer concentrations, the interfacial polymerization time, and the curing temperature, were investigated, respectively. The rejection and the permeate flux of the resultant composite hollow fiber CL membrane fabricated under the optimal conditions towards a MgCl2 solution of 1000 ppm were 95.1% and 10.3 L m(-2) h(-1), respectively, at 0.4 MPa and 25 degrees C. Moreover, the effects of operation conditions on the rejection performance of the composite hollow fiber NF membrane were investigated. It suggested that this novel kind of hollow fiber composite nanofiltration membrane based on CL have excellent stability in rejection performances to salt solutions.
机译：通过在聚醚砜（PES）中空纤维超滤（UF）膜上，通过壳聚糖乳酸盐（CL）和三咪酰氯（TMC）之间的界面聚合（IP）制备带正电气的复合中空纤维纳滤（NF）膜。用衰减的总反射 - 红外光谱（ATR-IR）和扫描电子显微镜（SEM）表征所得NF膜的化学结构和形态。对不同无机盐水溶液的NF膜的抑制率下列序列：MgCl2＆Gt; ZnCl2＆ mgso4＆ NaCl＆ Na2SO4。它表明这种新颖的复合中空纤维NF膜具有正电荷。通过用不同的分子量（M-W）抑制聚乙二醇（PEG）溶液获得分子量截止（MWCO）。分别研究单体浓度，界面聚合时间和固化温度的影响。在最佳条件下朝向MgCl 2溶液的最佳条件下制造的所得复合中空纤维CL膜的抑制和渗透通量分别为95.1％和10.3L m（-2）H（-1），在0.4MPa和25时此外，研究了对复合中空纤维NF膜排斥性能的操作条件对复合中空纤维NF膜的影响。它表明，基于CL的这种新型中空纤维复合纳滤膜具有优异的盐溶液的排斥性能稳定性。

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  • 来源
    《RSC Advances》 |2019年第8期|共9页
  • 作者

    He Yuantao; Miao Jing; Chen Shunquan; Zhang Rui; Zhang Ling; Tang Haolin; Yang Hao;

  • 作者单位

    Chinese Acad Sci Guangdong Key Lab Membrane Mat &

    Membrane Separat Guangzhou Inst Adv Technol Guangzhou 511458 Guangdong Peoples R China;

    Chinese Acad Sci Guangdong Key Lab Membrane Mat &

    Membrane Separat Guangzhou Inst Adv Technol Guangzhou 511458 Guangdong Peoples R China;

    Chinese Acad Sci Guangdong Key Lab Membrane Mat &

    Membrane Separat Guangzhou Inst Adv Technol Guangzhou 511458 Guangdong Peoples R China;

    New Water Technol Inc NEWA Shandong Disk Tube Reverse Osmosis DTRO Membrane Wuhan Hubei Peoples R China;

    Univ Jinan Sch Resource &

    Environm Jinan 250022 Shandong Peoples R China;

    Wuhan Univ Technol State Key Lab Adv Technol Mat Synth &

    Proc Wuhan 430070 Peoples R China;

    Wuhan Inst Technol Sch Chem Engn &

    Pharm Minist Educ Key Lab Green Chem Proc Wuhan 430205 Hubei Peoples R China;

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