原位生长的CNTs@MoS_(2)杂化物增强水性膨胀型防火涂料的耐火和隔热性能  

Fire Resistance and Thermal Insulation of in Situ-grown CNTs@MoS_(2) Hybrids Enhanced Waterborne Intumescent Flame-retardant Coatings

作　　者：王晓明 朱耿增 金义杰 贾丹[2] 段海涛[2] 詹胜鹏[2] 杨田 凃杰松 章武林 马利欣 WANG Xiaoming;ZHU Gengzeng;JIN Yijie;JIA Dan;DUAN Haitao;ZHAN Shengpeng;YANG Tian;TU Jiesong;ZHANG Wulin;MA Lixin(State Grid Shandong Electric Power Research Institute,Jinan 250003,China;State Key Laboratory of Special Surface Protection Materials and Application Technology,Wuhan Research Institute of Materials Protection,Wuhan 430030,China)

机构地区：[1]国网山东省电力公司电力科学研究院,济南250003 [2]武汉材料保护研究所特种表面保护材料及应用技术国家重点实验室,武汉430030

出　　处：《表面技术》2024年第4期200-210,共11页Surface Technology

基　　金：国家电网公司总部科技项目(5500-202216111A-1-1-ZN)。

摘　　要：目的设计并研制一种耐火和隔热性能突出的水性膨胀型防火涂料。方法以碳纳米管(CNTs)、四水合钼酸铵、十六烷基溴化铵(CTAB)、硫脲为原料,通过简单的一步水热法原位生长出一种新型的CNTs@MoS_(2)杂化物,并采用FT-IR、XRD、拉曼光谱、SEM等手段对复合杂化物进行表征。再将CNTs@MoS_(2)杂化物作为增效剂分散在水性膨胀型防火涂料(CNTs@MoS_(2)/WES)中,通过大板实验和涂层、炭焦层表面分析评价了涂层的耐火和隔热性能。结果与WES(膨胀倍率为3.90)、CNTs/WES涂层(膨胀倍率为6.04)、MoS_(2)/WES涂层(膨胀倍率为4.59)相比,CNTs@MoS_(2)/WES涂层具有最高的膨胀倍率(8.88)。CNTs@MoS_(2)/WES涂层所涂覆的钢板在燃烧40min后背面温度最低(133.3℃),这充分表明该涂层具有优异的隔热性能。结论制备的CNTs@MoS_(2)杂化物表现出稳定的网络交织结构,有效提高了它在涂料中的分散性能。此外,CNTs@MoS_(2)/WES涂层优异的耐火和隔热性能主要归因于:1)CNTs@MoS_(2)/WES涂层及其炭焦层具有更致密和完整的表面,阻隔了热量的传递;2)CNTs的添加增强了炭焦层的致密性,抑制了膨胀过程中产生的气体泄漏,提升了涂层膨胀倍率;3)MoS_(2)提高了膨胀层强度且促进了炭焦层的形成,减少了裂纹和孔隙的产生。Fire is one of the most significant issues affecting the durability of steel constructions,which not only limits their application in industrial engineering but also seriously threatens the safety of personnel present.The latest ecologically friendly and aesthetic flame-retardant technology is a intumescent flame-retardant coating made from a triple system composed of ammonium polyphosphate,pentaerythritol,and melamine(P-C-N).However,its fire resistance and protective capacity are still insufficient.To address this problem,a waterborne intumescent flame-retardant coating with outstanding fire resistance and thermal insulation properties was designed and developed.The carbon nanotubes(CNTs),hexadecyl trimethyl ammonium bromide(CTAB),and thiourea were used as basic materials to synthesize novel CNTs@MoS_(2) hybrids through a straightforward one-step hydrothermal method.The composite hybrids were characterized using FT-IR,XRD,Raman spectroscopy and SEM techniques.FT-IR spectra showed that the CNTs were compounded with MoS_(2),and the absorption peaks of both CNTs and MoS_(2) were observed on the curves of the CNTs@MoS_(2) hybrids.XRD spectra confirmed the diffraction peaks at 2θ=14.2°,25.8°,32.5°,37.4°and 57.2°for the CNTs@MoS_(2) hybrids,respectively.The Raman spectrum showed a higher ID/IG=0.63 of CNTs@MoS_(2) samples than that of CNTs(ID/IG=0.52)since the partial filling of the CNTs surface with MoS_(2) matrix.It was found that the hybrid of CNTs@MoS_(2) was composed of CNTs nanowires and molybdenum disulfide microspheres.Afterward,the synergist CNTs@MoS_(2) hybrid was dispersed in waterborne intumescent fireproofing coatings(CNTs@MoS_(2)/WES),and their fire resistance and thermal insulation properties were evaluated by large-plate experiments and surface analyses of the coating and charred layers.SEM images showed that there were obvious cracks and pores on the WES,CNTs/WES and MoS_(2)/WES coating surfaces.However,CNTs@MoS_(2)/WES coatings displayed a smooth and dense surface,which could improve the barrie

关 键 词：碳纳米管(CNTs) 二硫化钼(MoS_(2)) 协同效应 耐火性能 阻燃机理 

分 类 号：TQ328.3[化学工程—合成树脂塑料工业]