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剪切取向氧化石墨烯纳米片复合聚偏氟乙烯复合膜用于选择性染料截留及高水通量

Shear-aligned graphene oxide nanosheets incorporated PVDF composite membranes for selective dye rejection with high water flux.

作者信息

Islam Sk Safikul, Jose Theres, Seikh Asiful Hossain, Karim Mohammad Rezaul, Alnaser Ibrahim A, Bose Suryasarathi

机构信息

Department of Materials Engineering, Indian Institute of Science Bangalore-560012 Karnataka India

Center of Excellence for Research in Engineering Materials (CEREM), King Saud University P.O. Box 800 Al-Riyadh 11421 Saudi Arabia

出版信息

RSC Adv. 2024 Sep 2;14(38):27852-27861. doi: 10.1039/d4ra04147j. eCollection 2024 Aug 29.

DOI:10.1039/d4ra04147j
PMID:39224648
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11367625/
Abstract

Membrane technology is crucial in addressing water pollution challenges, particularly in removing dyes from wastewater. This study presents a novel approach to fabricating shear-aligned graphene oxide (GO) nanosheets incorporated polyvinylidene fluoride (PVDF) membranes for achieving exceptional dye rejection efficiency while maintaining high water flux. The membranes were prepared by dispersing graphene oxide within a PVDF matrix and subsequent subjection to shear alignment techniques. Shear and flow-induced alignment were explored to achieve precise and controlled alignment of graphene oxide flakes within the PVDF matrix. The resulting membranes exhibited enhanced structural integrity and optimized molecular packing of PVDF and GO, enabling them to selectively reject dyes while allowing efficient water permeation. The fabricated membranes were extensively characterized using appropriate testing methods. The results demonstrated that the shear-aligned GO sheets infused PVDF composite membranes exhibited outstanding dye rejection (96-99%) performance, surpassing conventional membranes while maintaining high water flux. This innovative membrane fabrication approach holds significant promise for advanced water treatment applications, offering a sustainable solution for selective dye removal and efficient water purification.

摘要

膜技术在应对水污染挑战方面至关重要，尤其是在去除废水中的染料方面。本研究提出了一种新颖的方法来制备掺入剪切取向氧化石墨烯（GO）纳米片的聚偏氟乙烯（PVDF）膜，以实现卓越的染料截留效率，同时保持高水通量。通过将氧化石墨烯分散在PVDF基质中并随后采用剪切取向技术来制备膜。研究了剪切和流动诱导取向，以实现氧化石墨烯薄片在PVDF基质中的精确和可控取向。所得膜表现出增强的结构完整性以及PVDF和GO的优化分子堆积，使其能够选择性地截留染料，同时允许高效的水渗透。使用适当的测试方法对制备的膜进行了广泛表征。结果表明，剪切取向的GO片材注入PVDF复合膜表现出出色的染料截留（96 - 99%）性能，超过了传统膜，同时保持了高水通量。这种创新的膜制备方法在先进的水处理应用中具有巨大潜力，为选择性染料去除和高效水净化提供了可持续的解决方案。

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