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使用聚丙烯酰胺水凝胶吸附水泥基材料中的氯离子。

Using polyacrylamide hydrogel to adsorb chloride ions in cement-based materials.

作者信息

Wu Chao, Jin Bo, Li Zhenghui, Xu Yuexin, Ma Yutao, Cao Meng, Li Hui, Huang Changmiao, Chen Wanyu, Wu Hao

机构信息

General Contracting Co., Ltd of China Construction Third Engineering Bureau Group Co., Ltd Wuhan Hubei 430064 China

School of Materials Science and Engineering, Wuhan University of Technology Wuhan 430070 China.

出版信息

RSC Adv. 2023 Sep 8;13(38):26960-26966. doi: 10.1039/d3ra04154a. eCollection 2023 Sep 4.

DOI:10.1039/d3ra04154a
PMID:37692344
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10486199/
Abstract

Concrete material is an important engineering material for modern marine engineering construction, but the presence of chloride ions in sea sand and seawater can cause corrosion of reinforcing steel, which greatly endangers the safety of reinforced concrete structures. Gel is an environmental friendly functional material which has the functions of exchange and adsorption of ions. Therefore, in this paper, polyacrylamide (PAM) gels were prepared for chloride ions adsorption in a reinforced concrete system. The chloride ions adsorption behavior of PAM gel in simulated seawater and cement were investigated and the maximum adsorption capacity of chloride ions in simulated seawater was 32.67 mg g. In addition, compared with the cement sample without gel, the chloride ion content in the cement sample containing 1.5 wt% gel was reduced 46.8% at a depth of 0-2.5 mm from the sample's surface. The results showed that PAM gel can effectively adsorb the chloride ion and improve the chloride ion penetration resistance in cement because the three-dimensional network structure of PAM gels allowed chloride ions to enter the inside of the gel. This gel has potential applications in the field of marine construction.

摘要

混凝土材料是现代海洋工程建设中的一种重要工程材料，但海砂和海水中氯离子的存在会导致钢筋腐蚀，这极大地危及钢筋混凝土结构的安全。凝胶是一种具有离子交换和吸附功能的环保型功能材料。因此，本文制备了聚丙烯酰胺（PAM）凝胶用于钢筋混凝土体系中氯离子的吸附。研究了PAM凝胶在模拟海水和水泥中的氯离子吸附行为，其在模拟海水中对氯离子的最大吸附量为32.67 mg/g。此外，与不含凝胶的水泥样品相比，在距样品表面0-2.5 mm深度处，含1.5 wt%凝胶的水泥样品中的氯离子含量降低了46.8%。结果表明，PAM凝胶能够有效吸附氯离子并提高水泥的抗氯离子渗透性能，因为PAM凝胶的三维网络结构允许氯离子进入凝胶内部。这种凝胶在海洋建设领域具有潜在的应用价值。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/c0dbf38b406f/d3ra04154a-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/5a2686c25971/d3ra04154a-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/aa4f5436a71d/d3ra04154a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/542bff1aaad8/d3ra04154a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/36a2778981c7/d3ra04154a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/0d1973d475c2/d3ra04154a-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/c0dbf38b406f/d3ra04154a-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/5a2686c25971/d3ra04154a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/8bf1ce03fabf/d3ra04154a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/aa4f5436a71d/d3ra04154a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/542bff1aaad8/d3ra04154a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/36a2778981c7/d3ra04154a-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/0d1973d475c2/d3ra04154a-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5958/10486199/c0dbf38b406f/d3ra04154a-f7.jpg

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本文引用的文献

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Self-Wrinkling in Polyacrylamide Hydrogel Bilayers.聚丙烯酰胺水凝胶双层膜中的自褶皱现象
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In-Capillary Photodeposition of Glyphosate-Containing Polyacrylamide Nanometer-Thick Films.含草甘膦聚丙烯酰胺纳米厚膜的毛细管内光沉积
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Study on a Hydrogel for Adsorption of Chloride Ions in Cementitious Materials.用于吸附胶凝材料中氯离子的水凝胶的研究
Polymers (Basel). 2022 May 20;14(10):2081. doi: 10.3390/polym14102081.
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Biocompatible In Situ Polymerization of Multipurpose Polyacrylamide-Based Hydrogels on Skin via Silver Ion Catalyzation.银离子催化下基于多功能聚丙烯酰胺的水凝胶在皮肤表面的可兼容的原位聚合。
ACS Appl Mater Interfaces. 2020 Jul 15;12(28):31079-31089. doi: 10.1021/acsami.0c02495. Epub 2020 Jul 1.
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Anionic dye uptake via composite using chitosan-polyacrylamide hydrogel as matrix containing TiO nanoparticles; comprehensive adsorption studies.以壳聚糖-聚丙烯酰胺水凝胶为基质、含TiO纳米颗粒的复合材料对阴离子染料的摄取；综合吸附研究
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