Waterborne Polyurethane Transparent Coatings for Self-Healing at Room Temperature

IF 5.2 1区化学 Q1 POLYMER SCIENCE Macromolecules Pub Date : 2025-03-21 DOI:10.1021/acs.macromol.4c02732

Kanyarat Mantala, Daniel Crespy

引用次数: 0

Abstract

Waterborne polyurethanes are now widely used for preparing adhesives and coatings. They are considered as a sustainable alternative for solvent-borne applications because of reductions in volatile organic compounds (VOC) emissions. However, imparting a property of self-healing at room temperature to these polyurethanes remains challenging. Herein, we synthesized prepolymers containing thiosulfate groups, which enabled their dispersibility in aqueous solutions. The thiosulfate groups were subsequently hydrolyzed to form disulfide bonds. Recovery of mechanical and optical properties (transmittance) at room temperature was then observed due to dynamic disulfide exchange reactions.

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室温自愈水性聚氨酯透明涂料

水性聚氨酯目前被广泛用于制备粘合剂和涂料。由于减少了挥发性有机化合物（VOC）的排放，它们被认为是溶剂型应用的可持续替代品。然而，为这些聚氨酯赋予室温下自愈合的特性仍具有挑战性。在此，我们合成了含有硫代硫酸酯基团的预聚物，使其能够在水溶液中分散。硫代硫酸基团随后水解形成二硫键。由于二硫化物的动态交换反应，在室温下可观察到机械和光学特性（透光率）的恢复。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.