Closed-Loop Recyclable, Self-Catalytic Transesterification Vitrimer Coatings with Superior Adhesive Strength, Fire Retardancy, and Environmental Stability

IF 8.7 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Materials Letters Pub Date : 2024-12-13 DOI:10.1021/acsmaterialslett.4c02235

Cheng Wang, Guofeng Ye, Qi Zhang*, Hao Wang, Siqi Huo* and Zhitian Liu*,

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Abstract

The nondegradability, nonreusability, and flammability of epoxy coatings have brought serious environmental and safety issues. Herein, a multifunctional, fire-retardant epoxy vitrimer coating (DCNC/45PETO) was prepared via curing bis(2,3-epoxypropyl)cyclohex-4-ene-1,2-dicarboxylate (DCNC) with a well-designed phosphaphenanthrene-containing polyethylenimine (PETO) at room temperature. DCNC/45PETO exhibits excellent adhesion to different substrates, with a high adhesive strength of 7.9 MPa on wood, outperforming previous wood coatings/adhesives. The DCNC/45PETO coating endows wood with excellent fire retardancy, including a high limiting oxygen index of 34.0% and a vertical burning (UL-94) V-0 rating. DCNC/45PETO demonstrates durable adhesion and fire-retardant performances in harsh environments. The self-catalytic transesterification within the DCNC/45PETO network effectively avoids the application of extra toxic catalysts, and this coating can be reused for at least 5 times in mild conditions without compromising its performances. This study provides an innovative design strategy for creating multifunctional vitrimer coatings, showing great application potential in the construction field.

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闭环可回收，自催化酯交换玻璃体涂层具有优异的粘接强度，阻燃性和环境稳定性

环氧涂料的不可降解性、不可重复使用性和易燃性带来了严重的环境和安全问题。在此基础上，采用设计好的含磷菲的聚乙烯亚胺（PETO）在室温下固化双（2,3-环氧丙基）环己基-4-烯-1,2-二羧酸酯（DCNC），制备了一种多功能阻燃环氧玻璃涂料（DCNC/45PETO）。DCNC/45PETO对不同的基材具有优异的附着力，对木材的粘附强度高达7.9 MPa，优于以前的木器涂料/粘合剂。DCNC/45PETO涂层赋予木材优异的阻燃性，包括34.0%的高极限氧指数和垂直燃烧（UL-94） V-0等级。DCNC/45PETO在恶劣环境中具有持久的粘合和阻燃性能。DCNC/45PETO网络内的自催化酯交换反应有效地避免了额外毒性催化剂的应用，并且该涂层可以在温和条件下重复使用至少5次而不影响其性能。本研究为构建多功能玻璃体涂料提供了一种创新的设计策略，在建筑领域具有很大的应用潜力。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.

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