文献类型：期刊文献

英文题名：Effect of nickel phytate on flame retardancy of intumescent flame retardant polylactic acid

作者：Gong, Weiguang[1];Fan, Min[2];Luo, Ji[2];Liang, Juan[2];Meng, Xin[2]

机构：[1]East China Univ Sci & Technol, Res & Dev Ctr Sports Mat, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Chem Engn & Prod Engn Dept, Shanghai Key Lab Multiphase Mat, Shanghai 200237, Peoples R China

年份：2021

卷号：32

期号：4

起止页码：1548

外文期刊名：POLYMERS FOR ADVANCED TECHNOLOGIES

收录：;EI(收录号：20205109662107);WOS:【SCI-EXPANDED(收录号:WOS:000600266000001)】；

基金：National Natural Science Foundation of China, Grant/Award Number: 21576086

语种：英文

外文关键词：intumescent flame retardant mechanism; nickel phytate; polylactic acid; synergistic effect

摘要：Biodegradable polymers with flame retardancy have aroused great interest in the fabrication of biobased flame retardants. In this study, nickel phytate (PA-Ni) was prepared by reaction of phytic acid from plant seeds with nickel acetate in water and then used as flame retardant added into polylactic acid (PLA) with intumescent flame retardant (IFR). With the loading of 4 wt% PA-Ni and 11 wt% IFR, the resulted PLA composite can achieve a UL94 V-0 test rating. The results show that the pHRR of PLA/11IFR/4PA-Ni decreases by 62.3% compared with that of virgin PLA and residual char increases significantly. The flame retardant mechanism was analyzed by scanning electron microscopy-energy-dispersive x-ray spectroscopy and thermogravimetric analysis coupled to Fourier transform infrared spectroscopy. It is showed that PA-Ni can improve the formation of continuous and compact char residues, and phosphorus-containing compounds can act as a radical scavenger to quench free radicals generated during combustion, suggesting that gas-phase flame retarded mechanism coexists with condensing phase flame retarded mechanism.