Polymeric membranes with highly homogenized nanopores for ultrafast water purification

IF 25.7 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Junhui Huang, Yanqiu Zhang, Jing Guo, Fan Yang, Jun Ma, Yongping Bai, Lu Shao, Shaomin Liu, Huanting Wang
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Abstract

Membrane nanofiltration is widely used in various chemical separation and water purification processes. However, obtaining high water permeance and high solute removal selectivity for achieving energetically efficient precise separation in nanofiltration membranes remains challenging due to their inherent pore heterogeneity. Here we introduce a cinnamate-mediated polymerization method to fabricate nanofiltration membranes with highly homogenized and well-tailored nanopores to address this challenge. Our experimental data and molecular dynamics simulation results show that cinnamate-mediated polymerization can manipulate monomer diffusion and intermolecular void size to create a homogenized and tailored selective layer in a highly homogenized membrane. The obtained membrane exhibited a high water permeance of 104.3 l m−2 h−1 bar−1, which is substantially higher than that of the pristine membrane synthesized without cinnamate mediation, superior molecular sieving ability, excellent salt/dye separation factor and good operational stability, outperforming state-of-the-art membranes. Overall, this work enables the design and fabrication of nanofiltration membranes that combine other mutually exclusive properties for energetically efficient water purification applications towards a sustainable water–energy nexus. Nanofiltration membranes play a crucial role in water purification, but it remains challenging to combine high water permeance and solute removal selectivity due to their inherent pore heterogeneity. Here the authors introduce a cinnamate-mediated polymerization method to resolve such a challenge, enabling energetically efficient water purification.

Abstract Image

用于超快水净化的具有高度均匀纳米孔的聚合物膜
纳滤膜被广泛应用于各种化学分离和水净化过程中。然而,由于纳滤膜固有的孔隙异质性,要在纳滤膜中获得高透水性和高溶质去除选择性以实现高能高效的精确分离仍具有挑战性。在此,我们介绍了一种肉桂酸盐介导的聚合方法,用于制造具有高度均匀且定制良好的纳米孔的纳滤膜,以应对这一挑战。我们的实验数据和分子动力学模拟结果表明,肉桂酸盐介导的聚合可操纵单体扩散和分子间空隙大小,从而在高度均质化的膜中形成均质化和定制化的选择层。所获得的膜具有 104.3 l m-2 h-1 bar-1 的高透水性,大大高于未经肉桂酸盐介导合成的原始膜,同时还具有优异的分子筛分能力、出色的盐/染料分离因子和良好的操作稳定性,优于最先进的膜。总之,这项研究工作使纳滤膜的设计和制造成为可能,纳滤膜结合了其他相互排斥的特性,可用于高能高效的水净化应用,从而实现可持续的水-能源关系。纳滤膜在水净化中发挥着至关重要的作用,但由于其固有的孔隙异质性,要将高透水性和溶质去除选择性结合起来仍具有挑战性。在此,作者介绍了一种肉桂酸盐介导的聚合方法来解决这一难题,从而实现高能高效的水净化。
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来源期刊
Nature Sustainability
Nature Sustainability Energy-Renewable Energy, Sustainability and the Environment
CiteScore
41.90
自引率
1.10%
发文量
159
期刊介绍: Nature Sustainability aims to facilitate cross-disciplinary dialogues and bring together research fields that contribute to understanding how we organize our lives in a finite world and the impacts of our actions. Nature Sustainability will not only publish fundamental research but also significant investigations into policies and solutions for ensuring human well-being now and in the future.Its ultimate goal is to address the greatest challenges of our time.
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