羟丙基甲基纤维素与硅烷偶联剂对磷酸镁基钢结构防火涂料性能的影响  

The Effect of Hydroxypropyl Methylcellulose and Silane Coupling Agent on the Performance of Magnesium Phosphate Based Fireproof Coatings for Steel Structures

作　　者：陈永达 胡智淇 关岩 常钧 陈兵 CHEN Yongda;HU Zhiqi;GUAN Yan;CHANG Jun;CHEN Bing(School of Civil Enginerering,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China;Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China;School of Material and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China;Liaoning Provincial Magnesium Materials and Magnesium Resources Engineering Research Center,Anshan 114051,Liaoning,China;School of Naval Architecture,Ocean&Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]辽宁科技大学土木工程学院,辽宁鞍山114051 [2]大连理工大学建设工程学部,辽宁大连116024 [3]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [4]辽宁省镁资源与镁质材料专业创新中心,辽宁鞍山114051 [5]上海交通大学船舶海洋与建设工程学院,上海200240

出　　处：《材料导报》2025年第8期77-83,共7页Materials Reports

基　　金：国家重点研发计划(2022YFC3803100)。

摘　　要：利用羟丙基甲基纤维素(HPMC)与硅烷偶联剂(SCA)两种外加剂对新型磷酸镁(MPC)基钢结构防火涂料进行改性,研究了两种外加剂的掺入对涂料的力学性能、热防护性能等宏观指标的影响规律。分析外加剂对涂料水化的进程与水化产物的影响机理,并通过电化学分析手段探讨外加剂对涂料耐盐腐蚀性能的影响。结果表明,HPMC的掺入能降低涂料的干密度与导热率,提高涂料的防火性能,SCA的掺入则对这几项指标和性能的影响较小。两种外加剂的掺入会对涂料的抗压力学性能产生负面影响,但可以提高涂料与钢板间的黏结能力。微观测试结果表明,两种外加剂的掺入未影响涂料的物相成分,电化学测试结果表明,两种外加剂的掺入均可以提高涂料的耐盐腐蚀能力。A new magnesium phosphate(MPC)based steel structure fireproof coating was modified using two additives,hydroxypropyl methylcellulose(HPMC)and silane coupling agent(SCA),and the influence of these two additives on the macroscopic indicators such as mechanical properties and thermal protection performance of the coating was studied.Analyze the influence mechanism of additives on the hydration process and hydration products of coatings,and explored the effect of additives on the salt corrosion resistance of coatings through electrochemical analysis methods.The results indicate that the addition of HPMC can reduce the dry density and thermal conductivity of coatings,improve the fire resistance of coatings,while SCA has a relatively small impact on these.The addition of two additives will have a negative impact on the compressive mechanical properties of the coating,but on the other hand,it can improve the bonding ability between the coating and the steel plate.The microscopic test results show that the addition of the two additives does not change the phase composition of the coating.The electrochemical test results show that both additives can improve the salt corrosion resistance of the coating.

关 键 词：外加剂 水化 涂料 防火性能 力学性能 耐盐腐蚀 

分 类 号：TQ172[化学工程—水泥工业]