Application of water insoluble vinyl phosphate on silk fabric

Since quite a few eco-friendly permanent flame retardants for silk are available,this paper deals with the application of a self-prepared water insoluble flame retardant diethyl-2-(methacryloyloxyethyl) phosphate(DEMEP) on silk fabric,including emulsification of DEMEP,the stability of the emulsion and the size distribution of DEMEP emulsion.Adding 10%~15%(in terms of DEMEP mass percentage) mixture emulsifier contained Tween 80 and Span 80 at the mass ratio of 2 to 1 to DEMEP,a translucent emulsion with good thermal and quiescence stability was obtained.The resultant DEMEP emulsion was grafted onto silk fabric by copolymerization in water medium,and the removal of DEMEP homopolymer from the silk fabric with different solvents was explored.The results showed that acetone and methanol are good solvents for DEMEP homopolymer,and after 4 to 6 h extraction treatment,the homopolymer was basically removed.The whiteness and permeability of DEMEP grafted silk fabric decreased with the increase of graft yield.Micro-scale combustion calorimetry was used to test combustion behavior of the silk fabrics before and after flame retardant finish at milligram level,and the result showed that the heat release rate and total heat release of the finished silk fabric significantly decreased compared with the control,indicating it has good flame retardant property.