成膜物质对水性超薄型防火涂料性能的影响  

Effect of Film-forming Substances on Water-based Ultra-thin Fireproof Coatings

作　　者：郝海东 王雨昕 张思宇 郭精茂 王欣 马建超[1] HAO Haidong;WANG Yuxin;ZHANG Siyu;GUO Jingmao;WANG Xin;MA Jianchao(Colloge of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学矿业工程学院,太原030024 [2]太原理工大学材料科学与工程学院,太原030024

出　　处：《太原理工大学学报》2023年第2期247-256,共10页Journal of Taiyuan University of Technology

基　　金：山西省重点研发计划(社会发展领域)项目(201903D321053);国家重点研发计划项目(2019YFC0408604-4);山西省留学回国人员科研项目(HGKY2019017);山西省优秀青年学术带头人。

摘　　要：以膨胀倍率和钢板背温为考察指标,探究成膜物质环氧乳液、纯丙乳液、苯丙乳液等对水性超薄型防火涂料耐火性能的影响。结果发现复合环氧乳液∶纯丙乳液质量比1∶1成膜物质的防火涂料膨胀倍率最高,为14.4,燃烧80 min时钢板背温最低,为284.3℃,防火性能最佳。表征表明该成膜物质软化温度与膨胀(P-C-N)体系分解温度相匹配,可有效包裹P-C-N体系产生的气体,促进炭层形成多孔结构,阻滞热量传递;在燃烧中成膜物质等有机物分解完全,且多孔炭层表面含有TiO2及TiP2O7无机物组分,进一步增强其热屏蔽性和抗氧化性,最终残留重量为28.18%,具有良好的热稳定性。The effects of film-forming substances epoxy emulsion, acrylic emulsion and styrene-acrylic emulsion on the fire resistance of water-based ultra-thin fireproof coatings were investigated by using the expansion multiplier and back temperature of steel plates as indicators. The results show that the highest expansion multiplier of 14.4 and the lowest back temperature of 284.3 ℃ for 80 min were obtained for the composite coating with epoxy emulsion∶acrylic emulsion=1∶1. The softening temperature of the film-forming substance matched with the decomposition temperature of the expansion(P-C-N) system, which could effectively wrap the gas generated by the P-C-N system, promote the formation of porous structure of the carbon layer and block the heat transfer. The decomposition of organic substances such as film-forming substances is complete in combustion, and the surface of porous carbon layer contains TiO2and TiP2O7inorganic components, which further enhance its heat shielding and anti-oxidation properties, with a final residual weight of 28.18% and good thermal stability.

关 键 词：水性超薄型防火涂料 成膜物质 膨胀倍率 钢板背温 耐火性能 

分 类 号：TQ630.71[化学工程—精细化工]