双交联策略优化水性光固化涂料在放射性去污中的性能

IF 7.3 2区 材料科学 Q1 CHEMISTRY, APPLIED
Yanlin Zhu , Wen Zhou , Huimin Wu , Hanzhi Zhang , Xiangjian Meng , Xuehu Men
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引用次数: 0

摘要

随着核工业的发展,可剥离去污涂料在核设施退役和紧急情况下的广泛应用,目前的涂料面临着平衡内聚-粘附性能的挑战,因为它们的高剥离强度阻碍了从高表面能基底上完全去除。本研究开发了一种双交联网络策略,将柔性聚乙烯醇(PVA)和壳聚糖聚缩聚交联长链与刚性丙烯酸和丙烯酰胺自由基交联短链相结合,通过能量耗散机制协同提高水性可剥离涂层的强度。同时利用分子链上-OH和-COO−基团与Cs+的络合作用,达到高效去污效果。制备的可剥离涂层显示出一些优势,包括具有快速固化速率的多基材应用,与单交联网络涂层相比,机械强度增强(抗拉强度为2mpa,断裂伸长率为410%),界面附着力低(在水泥表面具有剥离强度<;2.2 N/cm)。值得注意的是,它对玻璃表面的去污效率为99.70%,对不锈钢表面的去污效率为99.68%,对混凝土表面的去污效率为92.40%,同时具有很强的耐溶剂性。因此,所制备的去污涂层在放射性表面去污领域具有良好的潜力和广泛的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Double crosslinking strategy for optimizing properties of waterborne UV-cured coating in radioactive decontamination applications
With the advancement of nuclear industry driving extensive applications of peelable decontamination coatings in nuclear facility decommissioning and emergency situations, current coatings face challenges in balancing cohesion-adhesion properties, as their high peel strength prevents complete removal from high surface energy substrates. In this work, a double crosslinking network strategy is developed, integrating flexible Poly(vinyl alcohol) (PVA) and chitosan polycondensation crosslinked long chains with rigid acrylic and acrylamide radical crosslinked short chains, synergistically enhancing waterborne peelable coating strength via energy dissipation mechanisms. At the same time, the complexation between -OH and -COO groups on the molecular chain and Cs+ is exploited to achieve efficient decontamination effect. The prepared peelable coating demonstrates some advantages, including multiple substrate applications with rapid curing rate, enhanced mechanical strength compared to single-crosslinked network coatings (with a tensile strength of 2 MPa and an elongation at break of 410 %), and low interfacial adhesion (with a peel strength <2.2 N/cm on cement surfaces). Remarkably, it achieves high decontamination efficiencies of 99.70 % on glass surfaces, 99.68 % on stainless steel surfaces and 92.40 % on concrete surfaces, while possessing robust solvent resistance. Therefore, the prepared decontamination coating has excellent potential with widespread application prospects in the field of radioactive surface decontamination.
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来源期刊
Progress in Organic Coatings
Progress in Organic Coatings 工程技术-材料科学:膜
CiteScore
11.40
自引率
15.20%
发文量
577
审稿时长
48 days
期刊介绍: The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.
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