王晓明,朱耿增,金义杰,贾丹,段海涛,詹胜鹏,杨田,凃杰松,章武林,马利欣.原位生长的CNTs@MoS2杂化物增强水性膨胀型防火涂料的耐火和隔热性能[J].表面技术,2024,53(4):200-210.
WANG Xiaoming,ZHU Gengzeng,JIN Yijie,JIA Dan,DUAN Haitao,ZHAN Shengpeng,YANG Tian,TU Jiesong,ZHANG Wulin,MA Lixin.Fire Resistance and Thermal Insulation of in Situ-grown CNTs@MoS2 Hybrids Enhanced Waterborne Intumescent Flame-retardant Coatings[J].Surface Technology,2024,53(4):200-210 |
| 原位生长的CNTs@MoS2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@MoS2 Hybrids Enhanced Waterborne Intumescent Flame-retardant Coatings |
| 投稿时间：2023-02-25 修订日期：2023-08-24 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.04.019 |
| 中文关键词: 碳纳米管(CNTs) 二硫化钼(MoS2) 协同效应 耐火性能 阻燃机理 |
| 英文关键词:carbon nanotubes (CNTs) molybdenum disulfide (MoS2) synergistic effect fire resistance flame-retardant mechanism |
| 基金项目:国家电网公司总部科技项目(5500-202216111A-1-1-ZN) |
|
|
| Author | Institution |
| WANG Xiaoming | State Grid Shandong Electric Power Research Institute, Jinan 250003, China |
| ZHU Gengzeng | State Grid Shandong Electric Power Research Institute, Jinan 250003, China |
| JIN Yijie | State Key Laboratory of Special Surface Protection Materials and Application Technology, Wuhan Research Institute of Materials Protection, Wuhan 430030, China |
| JIA Dan | State Key Laboratory of Special Surface Protection Materials and Application Technology, Wuhan Research Institute of Materials Protection, Wuhan 430030, China |
| DUAN Haitao | State Key Laboratory of Special Surface Protection Materials and Application Technology, Wuhan Research Institute of Materials Protection, Wuhan 430030, China |
| ZHAN Shengpeng | State Key Laboratory of Special Surface Protection Materials and Application Technology, Wuhan Research Institute of Materials Protection, Wuhan 430030, China |
| YANG Tian | State Key Laboratory of Special Surface Protection Materials and Application Technology, Wuhan Research Institute of Materials Protection, Wuhan 430030, China |
| TU Jiesong | State Key Laboratory of Special Surface Protection Materials and Application Technology, Wuhan Research Institute of Materials Protection, Wuhan 430030, China |
| ZHANG Wulin | State Key Laboratory of Special Surface Protection Materials and Application Technology, Wuhan Research Institute of Materials Protection, Wuhan 430030, China |
| MA Lixin | State Key Laboratory of Special Surface Protection Materials and Application Technology, Wuhan Research Institute of Materials Protection, Wuhan 430030, China |
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 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@MoS2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@MoS2杂化物作为增效剂分散在水性膨胀型防火涂料(CNTs@MoS2/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)、MoS2/WES涂层(膨胀倍率为4.59)相比，CNTs@MoS2/WES涂层具有最高的膨胀倍率(8.88)。CNTs@MoS2/WES涂层所涂覆的钢板在燃烧40 min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@MoS2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@MoS2/WES涂层优异的耐火和隔热性能主要归因于:1)CNTs@MoS2/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)MoS2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。 |
| 英文摘要: |
| 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@MoS2 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 MoS2, and the absorption peaks of both CNTs and MoS2 were observed on the curves of the CNTs@MoS2 hybrids. XRD spectra confirmed the diffraction peaks at 2θ=14.2°, 25.8°, 32.5°, 37.4° and 57.2° for the CNTs@MoS2 hybrids, respectively. The Raman spectrum showed a higher ID/IG= 0.63 of CNTs@MoS2 samples than that of CNTs (ID/IG=0.52) since the partial filling of the CNTs surface with MoS2 matrix. It was found that the hybrid of CNTs@MoS2 was composed of CNTs nanowires and molybdenum disulfide microspheres. Afterward, the synergist CNTs@MoS2 hybrid was dispersed in waterborne intumescent fireproofing coatings (CNTs@MoS2/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 MoS2/WES coating surfaces. However, CNTs@MoS2/WES coatings displayed a smooth and dense surface, which could improve the barrier effect of the coatings. In general, the difficulty of heat transfer from the air to the substrate rose with the thickness of the expansion layer. It was confirmed that the expansion ratio of CNTs@MoS2/WES, CNTs/WES and MoS2/WES coatings were 8.88 times, 6.04 times and 4.59 times, respectively, which was much higher than that of the WES coating (3.90 times), which indicated that CNTs@MoS2 hybrids preferably promoted the fire resistance of the WES coating. In addition, CNTs@MoS2/WES coatings exhibited the lowest backside temperature (133.3 ℃) after 40 min of combustion, which confirmed their better thermal insulation properties. The morphology of the char layer of the coating was observed using the SEM technique. Results displayed that the char layer of CNTs@MoS2/WES coatings presented a more complete carbon coke layer with uniform and stable expansion structures and smaller pores, which effectively inhibited the transfer of external heat and oxygen to the steel surface. In brief, the prepared CNTs@MoS2 hybrids display a stable network hybridization structure, which effectively improves their dispersion performance in coatings. In addition, the excellent fire and thermal insulation properties of CNTs@MoS2/WES coatings are mainly attributed to 1) denser and more complete surfaces of coatings and their char layers; 2) dilution of heat and oxygen by carbon dioxide released during combustion; and 3) reduction of cracks and porosity via catalytic carbonation of MoS2. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
渝公网安备 50010702501715号