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构建具有优异PM2.5过滤效率的稳定聚乙烯醇/明胶/纤维素纳米晶体复合电纺膜。

Constructing Stable Polyvinyl Alcohol/Gelatin/Cellulose Nanocrystals Composite Electrospun Membrane with Excellent Filtration Efficiency for PM2.5.

作者信息

He Yang, Liu Haijun, Ying Weijun

机构信息

Jiyang College of Zhejiang Agriculture and Forestry University, Shaoxing 311800, China.

Huzhou College, Huzhou 313002, China.

出版信息

Polymers (Basel). 2024 Jun 11;16(12):1656. doi: 10.3390/polym16121656.

DOI:10.3390/polym16121656
PMID:38932006
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11207967/
Abstract

Considering the high demand for air quality, the development of biomass-based air filtration membranes with high air filtration efficiency and good stability is an urgent task. In this work, polyvinyl alcohol (PVA), gelatin (GA), and cellulose nanocrystals (CNC) were mixed and prepared into a membrane through an electrospinning method for air filtration. After a hydrophobic modification, the modified PVA/GA/CNC composite membrane showed excellent filtration efficiency for PM2.5 (97.65%) through the internal three-dimensional structure barrier and the electrostatic capture effect of the CNC with a negative charge, as well as a low-pressure drop (only 50 Pa). In addition, the modified PVA/GA/CNC composite membrane had good mechanical properties (maximum tensile fracture rate of 78.3%) and high stability (air filtration efficiency of above 90% after five wash-filter cycles and a high-temperature treatment at 200 °C). It is worth noting that the whole preparation process is completed without organic solvents, putting forward a new strategy for the construction of green air filtration membranes.

摘要

鉴于对空气质量的高要求，开发具有高空气过滤效率和良好稳定性的生物质基空气过滤膜是一项紧迫任务。在这项工作中，将聚乙烯醇（PVA）、明胶（GA）和纤维素纳米晶体（CNC）混合，并通过静电纺丝法制备成用于空气过滤的膜。经过疏水改性后，改性的PVA/GA/CNC复合膜通过内部三维结构屏障以及带负电荷的CNC的静电捕获作用，对PM2.5表现出优异的过滤效率（97.65%），并且压降较低（仅50 Pa）。此外，改性的PVA/GA/CNC复合膜具有良好的机械性能（最大拉伸断裂率为78.3%）和高稳定性（经过五次洗涤-过滤循环以及在200°C下高温处理后，空气过滤效率仍高于90%）。值得注意的是，整个制备过程无需有机溶剂完成，为绿色空气过滤膜的构建提出了一种新策略。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/4347d09c33d5/polymers-16-01656-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/350cfef14316/polymers-16-01656-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/3280e5e48c84/polymers-16-01656-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/9ba4ef9778a6/polymers-16-01656-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/4c296fc90c96/polymers-16-01656-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/72275a19445c/polymers-16-01656-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/76eaba689233/polymers-16-01656-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/e6ea6c75081d/polymers-16-01656-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/fc7efccbe85e/polymers-16-01656-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/4347d09c33d5/polymers-16-01656-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/350cfef14316/polymers-16-01656-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/3280e5e48c84/polymers-16-01656-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/9ba4ef9778a6/polymers-16-01656-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/4c296fc90c96/polymers-16-01656-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/72275a19445c/polymers-16-01656-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/76eaba689233/polymers-16-01656-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/e6ea6c75081d/polymers-16-01656-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/fc7efccbe85e/polymers-16-01656-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4fa1/11207967/4347d09c33d5/polymers-16-01656-g009.jpg

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本文引用的文献

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Cellulose nanofibril/PVA/bamboo activated charcoal aerogel sheet with excellent capture for PM2.5 and thermal stability.纤维素纳米纤维/聚乙烯醇/竹炭气凝胶片具有优异的 PM2.5 捕获能力和热稳定性。
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