Bio-Based Trivalent Phytate:A Novel Strategy for Enhancing Fire Performance of Rigid Polyurethane Foam Composites  

作　　者：Bing Zhang Sujie Yang Mengru Liu Panyue Wen Xiuyu Liu Gang Tang Xiangrong Xu 

机构地区：[1]School of Architecture and Civil Engineering,Anhui University of Technology,Ma’anshan,243002,China [2]State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei,230026,China [3]School of Mechanical Engineering,Anhui University of Technology,Ma’anshan,243002,China [4]University of Belgrade,Belgrade,11120,Serbia

出　　处：《Journal of Renewable Materials》2022年第5期1201-1220,共20页可再生材料杂志（英文）

基　　金：This research was supported by National Key Research and Development Project(No.2017YFE0113200);National Natural Science Fund of China(Nos.51403004,U1833113).

摘　　要：Biomass phytic acid has potential flame retardant value as the main form of phosphorus in plant seeds.In this study,phytate-based flame retardants aluminum phytate(PA-Al)and iron phytate(PA-Fe)were synthesized and characterized.Subsequently,they were introduced into rigid polyurethane foam(RPUF)as flame retardants by one-step water-blown method.The results indicated that RPUF/PA-Fe30 exhibited the highest char residue of 22.1 wt%,significantly higher than 12.4 wt%of RPUF.Cone calorimetry analysis showed that the total heat release(THR)of RPUF/PA-Al30 decreased by 17.0%and total smoke release(TSR)decreased by 22.0%compared with pure RPUF,which were the lowest,demonstrating a low fire risk and good smoke suppression.Thermogravimetric analysis-Fourier transform infrared spectrometer(TG-FTIR)implied the release intensity of flammable gases(hydrocarbons,esters)and toxic gases(isocyanate,CO,aromatic compounds,HCN)of composites was significantly reduced after the addition of PA-Fe.The analysis of char residue indicated that the RPUF composites formed a dense char layer with a high degree of graphitization after the addition of PA-Al/PA-Fe,endowing RPUF composites with excellent mass&heat transmission inhibition effect and fire resistance in the combustion process.

关 键 词：Bio-based flame retardant phytic acid salt rigid polyurethane foam COMPOSITES smoke&toxicity suppression 

分 类 号：TB33[一般工业技术—材料科学与工程]