Preparation and Properties of n-C20@TiO2-x Phase Change Microcapsules and Thermoregulated Down Feather
The phase change microcapsule of n-C20@TiO2 with titanium dioxide(TiO2)as shell and n-eicosane(n-C20)as core was prepared through sol-gel method.The microcapsule of n-C20@TiO2-x was obtained by reduction reaction on TiO2 shell with hydrazine hydrate(N2H4·H2O)solution.Then,down feather(DF)with thermal storage and temperature regulation(n-C20@TiO2-x/DF)was fabricated by combining with n-C20@TiO2-x using waterborne polyurethane(WPU)as medium.The structural morphology and thermal properties of microencapsulated phase change materials(MEPCMs)and n-C20@TiO2-x/DF were characterized by Fourier transform infrared spectroscopy(FTIR),field emission scanning electron microscopy(FESEM),X-ray diffractometer(XRD),X-ray photoelectron spectroscopy(XPS)and differential scanning calorimetry(DSC),etc..The results showed that the particle size of n-C20@TiO2-x was about 309 nm,and heat enthalpy was increased from 80.2 J/g(n-C20@TiO2)before modification to 106.1 J/g,which exhibited good thermal stability.The heat enthalpy of obtained thermoregulated DF with 30%n-C20@TiO2-x was ca.18.7 J/g,and could still reach 10.6 J/g after 5 times of washing.It provided a strategy for the investigation of microcapsule modification and functional down feather materials,which was conducive to broaden the application of phase change materials in the traditional textile field.
Phase change microcapsuleTitanium dioxideDown featherThermal energy storage property
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