A fire-retardant coating for wood made from chitosan itaconate

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2024-09-07 DOI:10.1016/j.porgcoat.2024.108793

Nils Münstermann, Oliver Weichold

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Abstract

Wood is becoming increasingly popular again due to an increased environmental awareness. However, wood generally needs protection from a number of external influences such as moisture, UV, stains, and also fire. The latter is a particular challenge for building materials because once ignited, untreated wood usually burns down completely without the need for a continuous external heat supply. We have recently developed a sustainable coating based on polymerised chitosan itaconate, which protects wood against moisture, UV, and stains. Free-standing chitosan itaconate films were now found to be non-flammable and do not melt when exposed to fire. Thermogravimetric analyses of these films underscore the importance of polymerisation to increase the thermal stability. When applied to wood surfaces, the coating delays the ignition and the spreading of flames. A single application already reduces the burning rate by one third. With multiple layers of the coating, the samples extinguish as soon as the external flame is removed.

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由伊他肯酸壳聚糖制成的木材阻燃涂层

由于环保意识的增强，木材又变得越来越受欢迎。然而，木材通常需要受到一些外部影响的保护，如防潮、防紫外线、防污和防火。后者对于建筑材料来说是一个特殊的挑战，因为一旦被点燃，未经处理的木材通常会完全烧毁，而不需要持续的外部热量供应。我们最近开发了一种基于聚合壳聚糖伊它肯酸酯的可持续涂层，可以保护木材免受潮湿、紫外线和污渍的侵袭。现在，我们发现独立的伊他肯酸壳聚糖薄膜不易燃，遇火也不会熔化。对这些薄膜进行的热重分析表明，聚合对提高热稳定性非常重要。涂抹在木材表面后，涂层可以延缓火焰的点燃和蔓延。一次涂抹就能将燃烧速度降低三分之一。使用多层涂层后，一旦外部火焰消失，样品就会熄灭。

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

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.