二氧化钛、重晶石和高岭石填料对水基膨胀型防火涂料炭层形成的影响

IF 2.3 4区 材料科学 Q2 Chemistry
Iben Hansen-Bruhn, Anne Vetter Poulsen, Ulrik Abildgaard, Jens Bomholdt Ravnsbæk, Mogens Hinge
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引用次数: 2

摘要

膨胀型防火涂料被广泛应用,因为它结合了可设计的美观性和防火性,而不影响基材的性能。当暴露在热下时,膨胀的防火涂料膨胀并形成绝缘炭。本文研究了在膨胀涂层中添加高岭石、重晶石和二氧化钛作为功能填料的焦炭。400℃下的膨胀实验显示,高岭石对其有抑制作用(0.03 mm/s,膨胀因子≈7),而重晶石对其有协同作用(0.59 mm/s,膨胀因子≈85)。由此得出的焦炭密度和目测结果表明,重晶石焦炭不致密,有裂纹和空隙。通过单个燃烧项目测试对防火性能进行评估,重晶石系统为欧洲C级,二氧化钛系统为欧洲A2/B级。重晶石炭的热稳定性较差,随后的红外光谱分析显示钛炭形成热稳定性好的焦磷酸钛。进一步检测发现,二氧化钛炭具有均匀的闭孔结构,平均气泡尺寸为26 ~ 56µm。二氧化钛涂层迅速膨胀(0.37 mm/s,膨胀系数≈60),形成结构稳定的膨胀型焦,具有致密均匀的多孔结构,在持续加热下具有抗焦氧化的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effect of titania, barite, and kaolinite fillers on char layer formation in water-based intumescent fire-retardant coatings

Effect of titania, barite, and kaolinite fillers on char layer formation in water-based intumescent fire-retardant coatings

Intumescent fire-retardant coatings are widely applied as they combine designable aesthetics and fire protection without compromising substrate properties. When exposed to heat, intumescent fire-retardant coatings expand and build an insulating char. This study presents an investigation of the char by addition of kaolinite, barite, and titania as functional fillers in intumescent coatings. Expansion experiments at 400°C with custom build image analysis showed that kaolinite inhibited (0.03 mm/s, expansion factor ≈ 7), whereas barite acted synergistically on the expansion ability (0.59 mm/s, expansion factor ≈ 85). The resulting char density and the visual inspection showed that barite char was less compact, with cracks and voids. Evaluation of fire performance by single burning item tests resulted in Euroclass C for the barite system and Euroclass A2/B for the titania system. Post-heating chars demonstrated poor thermostability of barite char, and subsequent FTIR spectroscopy revealed that titania char formed the thermostable titanium pyrophosphate. Further inspection of the titania char revealed a uniform closed cell structure with mean bubble sizes of 26–56 µm. Titania coating expands rapidly (0.37 mm/s, expansion factor ≈ 60) and forms a structurally stable tumescent char with a compact and uniform porous structure exhibiting resistance to char oxidation at sustained heating.

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来源期刊
Journal of Coatings Technology and Research
Journal of Coatings Technology and Research CHEMISTRY, APPLIED-MATERIALS SCIENCE, COATINGS & FILMS
CiteScore
4.40
自引率
8.70%
发文量
0
期刊介绍: Journal of Coatings Technology and Research (JCTR) is a forum for the exchange of research, experience, knowledge and ideas among those with a professional interest in the science, technology and manufacture of functional, protective and decorative coatings including paints, inks and related coatings and their raw materials, and similar topics.
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