Preparation and Characterization of High Latent Heat Thermal Regulating Fiber Made of PVA and Paraffin
A convenient method for preparing the thermal regulating fibers with high latent heat has been developed. PVA thermal regulating fibers were prepared via a wet spinning process, with paraffin being the phase change material. The structures and properties of these fibers were investigated by SEM, TGA, DSC and tensile strength tester. With the paraffin content in the fibers increasing from 30wt% to 70wt%, the latent heat of the fibers increases from 42.8J/g to 87.8J/g and the paraffin phase
... araffin phase structures change from separation into partial interconnection. PVA matrix can not wrap paraffin effectively when the paraffin content increases up to 50wt%, so the paraffin loss in the spinning process increases. The thermal stability of fibers with low paraffin content is better than that of fibers with high paraffin content. After 100 heat-and-cool cycles, the latent heat of fibers lose a little. The tensile strength of these thermal regulating fibers is good enough for application in wrapping, filling, and nonwovens. INTRODUCTION With the development of the textile and clothing industry, more and more functional and intelligent fibers are needed to create new types of textiles. Thermal regulating fiber is one of these intelligent fibers which has attracted much attention due to its special function of regulating environment temperature [1, 2]. Thermal regulating fibers contain phase change materials (PCMs) which absorb energy from environment in the heating process as phase change takes place and releases the latent energy to the environment in a reverse cooling process. Clothing made from thermal regulating fibers can moderate the temperature of the human body from being too hot or too cold and functions as an air-conditioner .