Caramelization-inspired bio-based waterborne fire-resistant coating for various substrates

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2024-11-29 DOI:10.1016/j.cej.2024.158016

Houting Kang, Hong Yan, Ruijie Guo, Junying Wu, Yanming Wang, Jingyuan Tian, Cheng Zhang

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Abstract

Inspired by the caramelization of sugar, which forms a viscous, nonflammable substance at around 150 °C, we developed a bio-based, intumescent fire-resistant coating. Comprising hydroxypropyltrimethyl ammonium chloride chitosan (HACC), phytic acid (PA), and magnesium gluconate (MgG), this coating underwent rapid dehydration and charring expansion upon exposure to fire at ca. 180 °C, expanding ∼137 times to create a protective honeycomb char layer that shields substrates from oxygen and heat. Importantly, this coating enhanced fire resistance for polypropylene (PP), rubber, polyurethane foam (PUF), wallpaper, and wood, while maintaining transparency and strong adhesion. Typically, the coating (200 μm) reduced the heat release rate of PP by 63.7 %, extending the time to ignition from 34 s to 525 s. Furthermore, the 1200 μm thick coating slowed the slow rise of backside temperature on the steel plate, keeping it beneath 229 °C after being exposed to a butane torch flame at 1100 °C for 60 min. This eco-friendly innovation promises advanced fire protection and opens new avenues for sustainable, high-performance fire-resistance coatings.

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焦糖化启发的生物基水性防火涂料，适用于各种基材

受糖的焦糖化作用的启发，在150 °C左右形成一种粘性的、不易燃的物质，我们开发了一种基于生物的、膨胀的防火涂层。该涂层由羟丙基三甲基氯化铵壳聚糖（HACC）、植酸（PA）和葡萄糖酸镁（MgG）组成，在约180 °C的火中暴露后，经过快速脱水和炭化膨胀，膨胀 ~ 137倍，形成保护蜂窝炭化层，保护底物免受氧气和热量的侵害。重要的是，这种涂料增强了聚丙烯（PP）、橡胶、聚氨酯泡沫（PUF）、壁纸和木材的防火性能，同时保持了透明度和强附着力。通常情况下，涂层（200 μm）使PP的放热率降低了63.7 %，将点燃时间从34 s延长到525 s。此外，1200 μm厚的涂层减缓了钢板背面温度的缓慢上升，在1100 °C的丁烷火炬火焰中暴露60 min后，钢板背面温度保持在229 °C以下。这种环保的创新保证了先进的防火性能，并为可持续的高性能防火涂料开辟了新的途径。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.