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Green lignin-based polyester nanofiltration membranes with ethanol and chlorine resistance
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-07-21 , DOI: 10.1002/app.51427 Shuo Zhan 1 , Saisai Li 1 , Xia Zhan 2 , Jiding Li 3 , Jiandu Lei 1 , Luying Wang 1
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-07-21 , DOI: 10.1002/app.51427 Shuo Zhan 1 , Saisai Li 1 , Xia Zhan 2 , Jiding Li 3 , Jiandu Lei 1 , Luying Wang 1
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As the main water treatment material, polymeric membranes inevitably suffer from membrane fouling. In this work, novel lignin-based polyester composite nanofiltration membranes (NFM) with ethanol and chlorine resistance were fabricated via interfacial polymerization. Lignin alkali (LA), a green lignin derivative, typically treated as chemical waste in the paper industry, was employed as the aqueous monomer, trimesoyl chloride (TMC) is served as the organic monomer. The structure and separation properties of the lignin-based NFM were studied, revealing that the dense polyester separation layer may show good performance for dye removal. The rejections of the optimized LA/TMC-3 membrane with an excellent permeation flux of 13.9 kg m−2∙h−1 for rose Bengal sodium salt, brilliant blue, congo red, rhodamine B, MgSO4, and NaCl are 97.6%, 97.3%, 97.8%, 71.34%, 51.4%, and 31.8%, respectively. Moreover, the LA/TMC-3 membrane also shows long-term tolerance in ethanol and sodium hypochlorite solution; the rejection of LA/TMC-3 to dye only decreases 8% after 8 days when immersed in alcohol, while the normalized rejection maintains 94% after 4000 ppm-hours of continuous exposure to chlorine. This lignin-based polyester membrane may broaden the sustainable utilization sphere of lignin derivatives, at that provide a referable direction for the development of membrane materials.
中文翻译：
耐乙醇、耐氯的绿色木质素基聚酯纳滤膜
高分子膜作为主要的水处理材料，不可避免地会受到膜污染的影响。在这项工作中，通过界面聚合制备了具有乙醇和氯耐受性的新型木质素基聚酯复合纳滤膜 (NFM)。木质素碱 (LA) 是一种绿色木质素衍生物，通常在造纸工业中作为化学废物处理，用作水性单体，均苯三甲酰氯 (TMC) 用作有机单体。研究了木质素基 NFM 的结构和分离性能，表明致密的聚酯分离层可能表现出良好的染料去除性能。具有 13.9 kg m -2 ∙h -1优异渗透通量的优化 LA/TMC-3 膜的截留率对于玫瑰红钠盐，亮蓝、刚果红、罗丹明 B、MgSO 4和 NaCl 分别为 97.6%、97.3%、97.8%、71.34%、51.4% 和 31.8%。此外，LA/TMC-3膜在乙醇和次氯酸钠溶液中也表现出长期耐受性；当浸入酒精中 8 天后，LA/TMC-3 对染料的排斥率仅降低 8%，而在持续暴露于氯 4000 ppm 小时后，标准化的排斥率保持 94%。这种基于木质素的聚酯膜可以拓宽木质素衍生物的可持续利用领域，为膜材料的发展提供可参考的方向。
更新日期：2021-09-23
中文翻译：
耐乙醇、耐氯的绿色木质素基聚酯纳滤膜
高分子膜作为主要的水处理材料，不可避免地会受到膜污染的影响。在这项工作中，通过界面聚合制备了具有乙醇和氯耐受性的新型木质素基聚酯复合纳滤膜 (NFM)。木质素碱 (LA) 是一种绿色木质素衍生物，通常在造纸工业中作为化学废物处理，用作水性单体，均苯三甲酰氯 (TMC) 用作有机单体。研究了木质素基 NFM 的结构和分离性能，表明致密的聚酯分离层可能表现出良好的染料去除性能。具有 13.9 kg m -2 ∙h -1优异渗透通量的优化 LA/TMC-3 膜的截留率对于玫瑰红钠盐，亮蓝、刚果红、罗丹明 B、MgSO 4和 NaCl 分别为 97.6%、97.3%、97.8%、71.34%、51.4% 和 31.8%。此外，LA/TMC-3膜在乙醇和次氯酸钠溶液中也表现出长期耐受性；当浸入酒精中 8 天后，LA/TMC-3 对染料的排斥率仅降低 8%，而在持续暴露于氯 4000 ppm 小时后，标准化的排斥率保持 94%。这种基于木质素的聚酯膜可以拓宽木质素衍生物的可持续利用领域，为膜材料的发展提供可参考的方向。
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