摘要
Nanoscale red phosphorus(NRP)was synthesized via a phosphorus-amine dissolution method and immobilized onto mesoporous silica nanospheres(MSNs)to obtain hybrid NRP@MSN particles with improved dispersion stability.Epoxy resin(EP)composites containing 2 wt%fillers were prepared to evaluate their thermal and flame-retardant behaviors.Compared with EP,the NRP@MSNs/EP composite significantly enhanced fire safety,resulting in a 52.8%reduction in the peak heat release rate,a 13.9%decrease in total smoke production,and a 165%increase in char yield.Mechanical testing revealed a notable toughening effect under impact loading.The improved flame retardancy originates from the combined nano-barrier effect of MSNs and the catalytic charring and radical-quenching functions of NRP.This work demonstrates an efficient strategy for stabilizing NRP and highlights its strong potential as an environmentally friendly flame retardant for EP systems.
基金
financially supported by the National Natural Science Foundation of China(Nos.22175167 and 22375195)
the Science Fund for Distinguished Young Scholars of Anhui Province(No.2308085J05)
This work was also partially carried out at the Instruments Center for Physical Science,University of Science and Technology of China,and partially performed using the services from Scientific Compass(www.shiyanjia.com).
