PU@PEG相变材料的结构调控和性能研究

Structural Tuning and Performance Investigation of PU@PEG Phase Change Materials

相变材料与纺织材料结合能有效调节人体体温,提高人体穿着舒适性,降低人体对室内空调系统调温的依赖性,从而减少能源消耗。为改进固-固相变材料的性能,研究结合聚氨酯(PU)和聚乙二醇(PEG),利用同轴静电纺丝技术制备皮芯型PU@PEG固-固相变材料。通过控制静电纺丝工艺参数,调控纳米纤维定向排列程度与结晶程度,使相变材料的力学性能增强。定向排列的PU@PEG相变材料相较于随机排列的材料,其弹性模量提升幅度达到38.01%,断裂应力提升幅度达到15.92%,熔融焓提高8.51%,整体上提升了相变材料的储能性能和应用耐久性。

Combining phase change materials with textile materials can effectively regulate body temperature,enhance comfort,and reduce the reliance on air conditioning systems for temperature adjustment,thereby reducing energy consumption.This study prepared a core-shell PU@PEG solid-solid phase change material by using coaxial electrospinning,combining polyurethane(PU)and polyethylene glycol(PEG).By controlling the electrospinning process parameters and adjusting the alignment and crystallinity of nanofibers,the mechanical properties of the phase change material were enhanced.Compared to randomly arranged materials,the oriented PU@PEG phase change material exhibits a significant improvement in elastic modulus(increased by over 38.01%),fracture stress(increased by over 15.92%),and melting enthalpy(increased by 8.51%).Overall,this enhancement contributes to improved energy storage performance and application durability of the phase change material.