| Affiliation: | 1. School of Architecture and Civil Engineering, Anhui University of Technology, Ma'anshan City, Anhui Province, 243032 China
State Key Laboratory for Chemo/Bio-Sensing and Chemometrics, College of Materials Science and Engineering, Hunan University, Changsha, 410082 China;2. School of Architecture and Civil Engineering, Anhui University of Technology, Ma'anshan City, Anhui Province, 243032 China;3. College of Chemistry and Chemical Engineering, Anhui University, 111 Jiulong Road, Hefei, Anhui, 230601 China;4. State Key Laboratory for Chemo/Bio-Sensing and Chemometrics, College of Materials Science and Engineering, Hunan University, Changsha, 410082 China |
| Abstract: | Iron tailings (ITS), as solid decay absolved afterward beneficiation, are adverse to the environment. ITS to prepare zinc-containing mesoporous silicate (MAO-Zn) by a calcination-crystallization method are used. An admixture of ammonium polyphosphate (APP) and MAO-Zn can solve the problem of poor flame retardancy in rigid polyurethane foam (RPUF), giving them higher thermal stability and lower heat release. The total heat release rate and smoke factor values exhibited by RPUF-3 are 24.52 MJ m?2 and 234.29 MW m?2 respectively, a decrease of 38.45% and 29.60% respectively compared to pure RPUF. Lower combustible and toxic gas release intensities are in RPUF-3. Meanwhile, RPUF-3 possesses enhanced compactness char residue with higher graphitization degree, endowing RPUF-3 with excellent fire observed performance. This work demonstrates the potential of ITS in the fire retardancy field. |
