Solvent-free room-temperature curable organic/silicone hybrid coating with high transparency and durable antifouling ability

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED Reactive & Functional Polymers Pub Date : 2024-10-26 DOI:10.1016/j.reactfunctpolym.2024.106078

Chaohua Peng, Longying Zhao, Xinjie Ma, An Huang, Guorong Chen, Weiang Luo, Conghui Yuan, Lizong Dai

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Abstract

Coatings with liquid repellent or antifouling ability are highly desirable in various fields. However, it is still a challenge to prepare solvent-free and room-temperature curable coating with high hardness, great antifouling performance, durability and large-area applicability. Herein, a novel strategy is reported to prepare organic/silicone hybrid coating by using amine-closed hyperbranched polysiloxane (SHPSi) as a latent curing, and diisocyanate containing a small amount of PFPE as an organic connecting part. In the presence of moisture, the mixture of the latent curing and the organic part can be cured at room temperature, and the smooth and low surface energy coating was obtained. The prepared hybrid coating had great transparency with the transmittance over 90 %. Due to the migration tendency of the PFPE to the air side, the surface energy of the hybrid coating decreased from 35.9 mJ/m² to 13.5 mJ/m² with 0.5 wt% PFPE, and the hybrid coating exhibited excellent antifouling ability. Besides, the hybrid coating can maintain the antifouling ability even after 2000 abrasion cycles. Furthermore, the great stability for various corrosive solutions and UV radiation was also achieved. More interestingly, the hybrid coating can be employed to protect various substrates, and large-area substrate was also realized. Therefore, this work would promote the application of high-performance organic/silicone hybrid coatings in an eco-friendly way.

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无溶剂室温固化有机硅混合涂料，具有高透明度和持久防污能力

具有斥液或防污能力的涂料在各个领域都非常受欢迎。然而，如何制备出硬度高、防污性能好、耐久性强、可大面积应用的无溶剂室温固化涂料仍是一项挑战。本文报道了一种制备有机/有机硅混合涂料的新策略，即使用胺封闭超支化聚硅氧烷（SHPSi）作为潜在固化物，含有少量全氟聚醚的二异氰酸酯作为有机连接部分。在有水分存在的情况下，潜伏固化和有机连接部分的混合物可在室温下固化，并获得光滑和低表面能的涂层。制备的混合涂层具有很高的透明度，透光率超过 90%。由于 PFPE 有向空气侧迁移的趋势，在 PFPE 含量为 0.5 wt% 时，混合涂层的表面能从 35.9 mJ/m2 降至 13.5 mJ/m2，混合涂层具有优异的防污能力。此外，混合涂层在经过 2000 次磨损后仍能保持防污能力。此外，混合涂层对各种腐蚀性溶液和紫外线辐射也有很好的稳定性。更有趣的是，该混合涂层可用于保护各种基材，还实现了大面积基材的保护。因此，这项工作将以环保的方式促进高性能有机硅混合涂料的应用。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.