Liu Yinli, Wu Dequn, Wang Xueli, Yu Jianyong, Li Faxue
Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University Shanghai 201620 China
College of Textiles, Donghua University Shanghai 201620 China.
RSC Adv. 2018 Nov 9;8(66):37715-37723. doi: 10.1039/c8ra07523a. eCollection 2018 Nov 7.
Considering the excellent thermo-mechanical properties, chemical stability and low cost of biodegradable aliphatic-aromatic copolyesters, they are an ideal matrix when functionalized for capturing pollutants in wastewater. In this work, biodegradable poly((butylene succinate--terephthalate)--serinol terephthalate) (PBSST) copolyesters with amino side group (-NH) were first synthesized through copolymerization, followed by grafting carboxymethyl-β-cyclodextrin (CM-β-CD) into PBSST molecular chains amidation reaction to prepare PBSST--β-CD. The corresponding nanofibrous membranes were then fabricated by electrospinning as adsorbents for efficiently removing cationic dye methyl blue (MB) from aqueous solutions. The adsorption performance of the nanofibrous membranes was fitted well with pseudo-second-order model and Langmuir isotherm model. The maximum adsorption capacity was 543.48 mg g for MB along with a removal efficiency of 98% after five regeneration cycles, indicating the high adsorption capacity and good recyclability of nanofibrous membranes. The adsorbents possess features of high adsorption capacity, eco-friendliness and easy operation, and exhibit great potential for disposing of printing-dying wastewater.
考虑到可生物降解的脂肪族-芳香族共聚酯具有优异的热机械性能、化学稳定性和低成本，它们在功能化用于捕获废水中的污染物时是一种理想的基质。在这项工作中，首先通过共聚合成了带有氨基侧基（-NH）的可生物降解聚（丁二酸丁二醇酯-对苯二甲酸酯）-丝氨酸对苯二甲酸酯（PBSST）共聚酯，然后通过酰胺化反应将羧甲基-β-环糊精（CM-β-CD）接枝到PBSST分子链中制备PBSST-β-CD。随后通过静电纺丝制备了相应的纳米纤维膜作为吸附剂，用于从水溶液中高效去除阳离子染料亚甲基蓝（MB）。纳米纤维膜的吸附性能与准二级模型和朗缪尔等温线模型拟合良好。MB的最大吸附容量为543.48 mg/g，经过五个再生循环后去除效率为98%，表明纳米纤维膜具有高吸附容量和良好的可回收性。该吸附剂具有吸附容量高、生态友好和操作简便的特点，在处理印染废水方面具有巨大潜力。
