Preparation and characterization of electrospun LA-PA/PET form-stable phase change composite fibers

Form-stable phase change fibers based on LA-PA binary eutectic/PET composite in which LA-PA serves as a solid-liquid phase change material and PET acts as a supporting material were successfully fabricated through electrospinning.The effect of amount of LA-PA eutectic in the solution on the properties of spinning solution,morphological structures and thermal energy storage properties of the composite fibers were studied.The results revealed that both the viscosity and surface tension of the spinning solution increased,while the conductivity decreased with the increase of LA-PA eutectic content in the solution.SEM images showed that the average diameter of the LA-PA/PET phase change composite fibers gradually increased as the content of LA-PA eutectic in the fibers increased;and the LA-PA/PET composite fibers possessed the wrinkled surface morphologies when the content of LA-PA eutectic in the fibers was too high.DSC analysis indicated that the values of heat enthalpies of the phase change composite fibers gradually increased with the increase of LA-PA eutectic amount,while their phase change temperatures had almost no significant variation.