Microencapsulation of water‐soluble flame retardant containing organophosphorus and its application on fabric

Abstract

Microencapsulation is based on multiple emulsion interfacial reaction technique that combines the characteristics of the interfacial reaction and conventional multiple-emulsion processes. In this study, the microcapsules were synthesized with the water-soluble dimethyl methyl phosphorate (DMMP) as the core material and the acetal product of polyvinyl alcohol (PVA) and glutaraldehyde (GA) as the shell material. The microcapsules were characterized by using DSC, IR spectrum and phosphorus qualitative analysis, and the factors affecting microencapsulation were identified and discussed. The data presented herein suggested that the size distribution of microcapsules was affected by the concentration of PVA and SPAN80 and by the phase volume ratio, while the crosslinking agent GA content has little effect. The data also showed that the microcapsules with the core of flame retardant containing organophosphorus would have promising applications in inflaming retarding of cotton fabric.

Design Requirements for Sensing and Detoxification Devices to be Used in Large Public Spaces. Literature Review on Typical Pollutants and Their Concentrations

“…The simulant compounds proposed to be used in the NANOSECURE project are dimethyl methylphosphonate (DMMP), diisopropyl methylphosphonate (DIMP), dimethyl phosphite (DMPI), dimethyl sulphide (DMS), diethyl methylphosphonate (DEMP), diethyl ethylphosphonate (DEEP) and triethyl phosphate (TEP). These compounds, but mainly DMMP, DIMP, DEEP and TEP, are widely used as simulants of chemical warfare agents [91], however, some of them have also commercial use, for example, as flame retardants [92,93], which makes them possible normal indoor air pollutants. However, no studies with measurements of their indoor concentrations were found.…”

Environmentally friendly flame-retardant textiles

“…Among the very few studies in this area, are the attempts to microencapsulate ammonium phosphate with polyurethane and polyurea shells to make an intrinsic intumescent system compatible with normal polyurethane (PU) coatings for textiles 75 and microencapsulation of watersoluble dimethyl phosphorate (DMMP) using the acetal product of polyvinyl alcohol (PVA) and glutaraldehyde (GA) as shell material. 76 Addition of encapsulated fl ame retardant to the polymer melt prior to fi bre spinning is also a possibility for producing a durable system.…”

Microencapsulation for Functional Textile Coatings with Emphasis on Biodegradability—A Systematic Review

“…Microencapsulation has been used to prevent exudation or sublimation of fire-retardant chemicals, to avoid reactions with textile polymers, and/or to overcome the hydrophilicity of the substances. Products include firefighting and military protective clothing, as well as textiles for automotive and domestic interiors [33][34][35][36].…”