Ampawan Sasimaporn, Phreecha Nathawut, Chantarak Sirinya, Chinpa Watchanida
Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
Office of Scientific Instrument and Testing, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
Int J Biol Macromol. 2023 Jan 15;225:1607-1619. doi: 10.1016/j.ijbiomac.2022.11.218. Epub 2022 Nov 23.
A bio-based membrane was prepared by a non-solvent induced phase separation process. A polylactide (PLA)/poly(butylene adipate-co-terephthalate) (PBAT) polymer blend was mixed with functionalized cellulose microfiber from empty fruit bunch (EFB) modified with maleic anhydride (MEFB). MEFB reduced the water contact angle and increased the porosity of the membrane. In a batch adsorption process, the pseudo-second order and Langmuir isotherm models best described the adsorption of the cationic dye methylene blue (MB) on PLA/PBAT and PLA/PBAT-MEFB membranes. In a dynamic adsorption process, pure water flux was higher through the PLA/PBAT-MEFB membrane (1214 L m h) than the PLA/PBAT membrane (371 L m h). The PLA/PBAT-MEFB membrane removed 97.2 % of MB while the PLA/PBAT membrane removed only 58.7 %. The hydrophilicity of the membrane and its adsorption efficiency toward MB were improved by the abundant carboxyl groups in MEFB. A filtration test using a mixed dye solution of anionic methyl orange (MO) and MB showed that the PLA/PBAT-MEFB membrane rapidly adsorbed MB while permitting MO to pass through. Moreover, this membrane could be easily regenerated and maintained a satisfactory separation performance over several cycles. Based on the membrane performance and its economical preparation, the proposed biocomposite membrane could be used for selective filtration and wastewater treatment.
通过非溶剂诱导相分离过程制备了一种生物基膜。将聚乳酸（PLA）/聚（己二酸丁二醇酯-对苯二甲酸丁二醇酯）（PBAT）聚合物共混物与用马来酸酐改性的来自空果串（EFB）的功能化纤维素微纤维（MEFB）混合。MEFB降低了膜的水接触角并增加了其孔隙率。在间歇吸附过程中，伪二级和朗缪尔等温线模型最能描述阳离子染料亚甲基蓝（MB）在PLA/PBAT和PLA/PBAT-MEFB膜上的吸附。在动态吸附过程中，通过PLA/PBAT-MEFB膜的纯水通量（1214 L m⁻² h⁻¹）高于PLA/PBAT膜（371 L m⁻² h⁻¹）。PLA/PBAT-MEFB膜去除了97.2%的MB，而PLA/PBAT膜仅去除了58.7%。MEFB中丰富的羧基提高了膜的亲水性及其对MB的吸附效率。使用阴离子甲基橙（MO）和MB的混合染料溶液进行的过滤试验表明，PLA/PBAT-MEFB膜能快速吸附MB，同时允许MO通过。此外，该膜易于再生，并且在几个循环中保持令人满意的分离性能。基于膜的性能及其经济的制备方法，所提出的生物复合膜可用于选择性过滤和废水处理。
