电纺十二酸十二酯@聚乙烯醇蓄热调温纤维的制备及性能

以十二酸十二酯作为相变材料(PCM)，以聚乙烯醇(PVA)作为支撑材料，通过乳液静电纺丝技术制备十二酸十二酯@PVA蓄热调温纤维。应用SEM、TEM、DSC、TGA、迷你温度记录仪和红外热成像仪等研究了纺丝液组成及静电纺纤维的表面形貌、潜热值、热稳定性、调温性能、力学性能和水溶性。结果表明，当PVA浓度为10.0wt%、十二酸十二酯∶PVA质量比为50%时，纺丝液具有较好的稳定性和可纺性。十二酸十二酯@PVA静电纺纤维具有明显的芯-鞘结构，纤维中PCM的热分解温度比纯PCM提高了20℃，具有良好的热稳定性。十二酸十二酯@PVA静电纺纤维的潜热值在63 J/g左右，在降温冷却和热红外成像测试中，显示出良好的蓄热调温性能。经戊二醛交联后，静电纺纤维中支撑材料的热稳定性显著增强，而且，纤维的力学性能和水溶解性得到明显改善。 

Preparation and properties of the electrospun dodecanol dodecanoate@polyvinyl alcohol thermo-regulated fibers

With dodecanol dodecanoate as the phase change material (PCM) and polyvinyl alcohol (PVA) as the supporting material, the dodecanol dodecanoate@PVA thermo-regulated fibers were prepared by emulsion electrospinning technology. The SEM, TEM, DSC, TGA, mini temperature recorder and infrared thermal imager were applied to study the composition of the spinning solution and the surface morphology, latent heat value, thermal stability, temperature regulating properties, mechanical property and water solubility of the electrospun fibers. The results show that with 10.0wt% of PVA and dodecanol dodecanoate∶PVA mass ratio of 50%, the spinning solution has better stability and spinnability. The dodecanol dodecanoate@PVA electrospun fibers have apparent core-sheath structure, and the thermal decomposition temperature of PCM in the fibers is 20℃ higher than the pure PCM, displaying good thermal stability. The latent heat value of dodecanol dodecanoate@PVA electrospun fibers is about 63 J/g, showing good heat storage and temperature regulation performance in cooling process and thermal infrared imaging test. After the crosslinking with glutaraldehyde, the thermal stability of the support material in the electrospun fibers is significantly enhanced, and the mechanical properties and water solubility of the fibers have notable improvement.