Phosphazene-based hybrid polymers have raised great interest in many different scientific fields due to their excellent thermal properties, biocompatibility and biodegradability. These outstanding features turn polyphosphazenes into one of the most interesting hybrid inorganic-organic materials. Cyclo-matrix type polyphosphazenes can be synthesized by crosslinking of the hexachlorocyclotriphosphazene (HCCP), with bi- or multifunctional alcohols or amines. Cyclo-matrix polyphosphazenes are promising candidates as carriers, adhesives or flame-retardant polymer additives. Recently we developed a versatile precipitation polycondencation method to synthesize polyphosphazene colloids with variable chemical structure, crosslink density and size. Starting with hexachlorocyclotriphosphazene (HCCP) and different multifunctional amines or phenols crosslinked cyclo-matrix polyphosphazene particles were synthesized. In this contribution we will focus on synthesis of hybrid colloids based on HCCTP and natural polyphenol tannic acid (TA). We demonstrate that the combination of two reactive building blocks allows flexible control of the chemical structure for hybrid polymer colloids. The influence of varying reagent ratios on the chemical composition and the morphology of the polymer particles was systematically investigated. Obtained hybrid particles were analysed by FTIR spectroscopy, dynamic light scattering, X-ray photoelectron spectroscopy, elemental analysis as well as 31P MAS NMR. The optimized synthesis process allows control of the particle size in extremely broad range (from 100 nm to 5 μm), variation of crosslink density, modification of chemical structure and efficient particle transfer into aqueous phase. Obtained polyphosphazene/TA colloids exhibit extraordinary properties like high thermal stability, degradability and reactive surface. Obtained colloids exhibit excellent adhesion to different fibre surfaces and this allows fabrication thin uniform coatings on textiles by simple dip-coating process. The application of polyphosphazene colloids in flame-retardant and antibacterial textile coatings will be discussed.

Functional, biobased poly(phosphazene) flame-retardant coatings for textiles

2019 Spring National Meeting

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