摘要
为了探索燃煤电厂产生的工业固体废弃物(漂珠)的资源化利用。以碱活化漂珠为基料,以聚磷酸铵(APP)、双季戊四醇(DPER)为阻燃体系,通过加入壳聚糖改性的聚磷酸铵(CS@APP)制备防火涂料。基于红外光谱仪(FT-IR)、锥形量热仪(CONE)、热重分析(TGA),研究CS@APP的含量对涂料的火灾安全性的影响,使用Coats-Redfern积分法计算涂料的热解动力学。研究结果表明:CS@APP使涂料在燃烧过程中形成不可燃的坚固残留物,用于阻隔热源和火源,使热释放速率峰值显著降低,并且大大降低产烟量,能有效提高涂料的火灾安全性。通过热解动力学拟合曲线得出,0.4 wt%的样品使E_(α)在727~1 000℃从266.03 kJ/mol升高到345.16 kJ/mol,对应热稳定性增强。研究结果可拓展城市建筑火灾应急技术,促进绿色、低成本、多功能性防火涂料的应用。
In order to explore the resource utilization of industrial solid waste(cenospheres)produced by the coal-fired power plants,a fireproof coating was prepared by adding chitosan(CS)modified ammonium polyphosphate(CS@APP)with the alkali-activated cenospheres as the base material,and the ammonium polyphosphate(APP)and dipentaerythritol(DPER)as the flame retardant system.Based on the infrared spectrometer(FT-IR),cone calorimeter(CONE)and thermogravimetric analysis(TGA),the influence of CS@APP dosage on the fire safety of coatings was studied,and the pyrolysis kinetics of coatings was calculated by Coats-Redfern integral method.The results show that CS@APP makes the coating form non-combustible robustness residues during combustion,which is used to block the heat and fire source,so that the peak heat release rate is significantly reduced,and the smoke production is greatly reduced,which can effectively improve the fire safety of coatings.According to the pyrolysis kinetics fitting curves,0.4 wt%of the sample increases the E_(α) from 266.03 to 345.16 kJ/mol at 727~1000℃,and the corresponding thermal stability is enhanced.The research results expand the fire emergency technology of urban buildings,and promote the application of green,low-cost and multifunctional fireproof coatings.
作者
李凡
王亚超
来梦瑶
赵江平
LI Fan;WANG Yachao;LAI Mengyao;ZHAO Jiangping(College of Resources and Engineering,Xi’an University of Architecture and Technology,Xi’an Shaanxi 710055,China)
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2023年第10期151-157,共7页
Journal of Safety Science and Technology
关键词
壳聚糖
聚磷酸铵
漂珠
防火涂料
热解动力学
chitosan
ammonium polyphosphate
cenosphere
fireproof coating
pyrolysis kinetics
作者简介
李凡,硕士研究生,主要研究方向为建筑安全与防火、生态性火安全技术。
