Effect of layered double hydroxide-graphene oxide modifier composition on characteristics of polyvinylidene fluoride based nanocomposite membranes in the separation of Cu2+

Q3 Engineering Communications in Science and Technology Pub Date : 2024-07-16 DOI:10.21924/cst.9.1.2024.1440

N. Kusumawati, P. Setiarso, S. Muslim, Sinta Anjas Cahyani, Nafisatus Zakiyah, A. Kahfi

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Abstract

This research explored the modified polyvinylidene fluoride (PVDF) nanofiber membranes with a composite of layered double hydroxide (LDH) and graphene oxide (GO) to enhance biofouling resistance. The PVDF/LDH-GO nanocomposite membranes were synthesized via vacuum filtration. FTIR analysis confirmed nanocomposite formation with new peaks indicating the presence of GO and LDH. Variations in the LDH:GO ratio affected the physical, mechanical, and performance properties of the membranes. Based on SEM imaging, the 1:1 LDH: GO ratio exhibited the highest Young's modulus and smallest pore sizes. LDH-GO incorporation increased the mechanical strength, porosity, roughness, hydrophilicity, and pure water permeability of the PVDF membranes. The combination of these factors led to balanced permeability and selectivity values towards Cu2+ solution feeds. LDH-GO was proven effective in modifying the PVDF membrane surface for water treatment and inhibiting biofouling up to 64% against E. coli.

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层状双氢氧化物-氧化石墨烯改性剂成分对基于聚偏氟乙烯的纳米复合膜分离 Cu2+ 特性的影响

本研究探讨了用层状双氢氧化物（LDH）和氧化石墨烯（GO）的复合材料改性聚偏二氟乙烯（PVDF）纳米纤维膜，以增强其抗生物污染能力。PVDF/LDH-GO 纳米复合膜是通过真空过滤合成的。傅立叶变换红外光谱分析证实了纳米复合材料的形成，其新的峰值表明了 GO 和 LDH 的存在。LDH:GO 比例的变化影响了膜的物理、机械和性能特性。根据 SEM 成像，1:1 的 LDH：GO 比例显示出最高的杨氏模量和最小的孔径。LDH-GO 的加入提高了 PVDF 膜的机械强度、孔隙率、粗糙度、亲水性和纯水渗透性。这些因素的结合使 Cu2+ 溶液进料的渗透性和选择性达到平衡。事实证明，LDH-GO 能有效改性用于水处理的 PVDF 膜表面，对大肠杆菌的生物污染抑制率高达 64%。

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