钨掺杂二氧化钒@聚多巴胺的制备及应用[1]

Preparation and properties of tungsten-doped vanadium dioxide@polydopamine modified polyurethane solid-solid phase change materials

摘要:

采用原位聚合法以聚乙二醇（PEG）为相变软段，异佛尔酮二异氰酸酯（IPDI）为硬段，聚多巴胺包覆的钨掺杂二氧化钒(W-VO2@PDA)作为填料，制备了钨掺杂二氧化钒@聚多巴胺改性聚氨酯固-固相变材料(W-VO2@PDA/PUPCM)。研究了PEG分子量对W-VO2@PDA/PUPCM乳液稳定性和整理织物调温性的影响；通过FT-IR、POM、DSC和TGA等对材料的化学结构、结晶性能、相变性能和热稳定性进行了测试和表征。结果表明，PEG分子量对W-VO2@PDA/PUPCM的储热性能和相变性能有很大的影响，当PEG分子量为8000时，W-VO2@PDA/PUPCM具有良好的形状稳定性和热稳定性，熔融温度和相变焓最高分别为51.52 ℃和144.82 J/g，经W-VO2@PDA/PUPCM整理后的织物和未经整理的织物相比升温和降温最大温差分别为7.8 ℃和5.3 ℃，在智能调温织物领域具有广泛的应用前景。

Abstract:

Tungsten-doped vanadium dioxide@poly(dopamine) modified polyurethane solid-solid phase change material (W-VO2@PDA/PUPCM) was prepared by in situ polymerization using polyethylene glycol (PEG) as the soft segment, isophorone diisocyanate (IPDI) as the hard segment and polydopamine-coated tungsten-doped vanadium dioxide (W-VO2@PDA) as the filler. The effect of PEG molecular weight on the stability of W-VO2@PDA/PUPCM emulsions and the temperature regulation of the finishing fabrics was investigated. The chemical structure, crystallization properties, phase change properties and thermal stability of W-VO2@PDA/PUPCM were tested and characterized by FT-IR, POM, DSC and TGA. The results showed that the molecular weight of PEG had a great influence on the thermal storage and phase change properties of W-VO2@PDA/PUPCM. When the molecular weight of PEG was 8000, W-VO2@PDA/PUPCM had good shape stability and thermal stability, and the highest melting temperature(51.52 ℃) and phase change enthalpy(144.82 J/g). The maximum temperature difference between the W-VO2@PDA/PUPCM finished fabric and unfinished fabric was 7.8 ℃ and 5.3 ℃ during the heating and cooling process. W-VO2@PDA/PUPCM finished fabric has a wide range of application prospects in the field of intelligent temperature control fabrics.