The rapid advancement of fresh e-commerce has driven the growth of the cold chain logistics, which spurs a significant demand for the upgrading of the phase change material (PCM) ensuring the transported items maintain at the required low temperature. This paper reported a novel form-stable phase change material poly (vinyl alcohol) (PVA) -based foams (FPCMPFs) with high efficiency fabricated by combining thermal foaming of PVA and in-situ polymerization of polyacrylic acid (PAA). The constructed double network structure improved the water storage to as high as 85.81 wt%, and enhanced the mechanical strength to maintain the shape stability even under 60 % compressive strain, which endowed FPCMPFs with good cold storage performance with high latent heat of 309.6 J/g, and prevented the water leakage in use. 65 g FPCMPFs located in a 7.0 × 7.0 × 10.5 cm box extended the storage time of the precooled grapes at -1-0 °C keeping at 5 °C from 28.7 min to 229.1 min, demonstrating the significant prospects for application in the cold chain logistics.

中文翻译：

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用于高效冷链物流的新型 PVA 泡沫

生鲜电商的快速发展带动了冷链物流的发展，从而刺激了对相变材料（PCM）升级的巨大需求，以确保运输的物品保持所需的低温。本文报道了一种新型形状稳定的相变材料聚（乙烯醇）（PVA）基泡沫（FPCMPF），通过结合PVA热发泡和聚丙烯酸（PAA）原位聚合，高效制备。构建的双网络结构将储水率提高到高达85.81 wt%，并增强了机械强度，即使在60%的压缩应变下也能保持形状稳定性，这使得FPCMPFs具有良好的蓄冷性能，潜热高达309.6 J/ g、防止使用中漏水。 65 g FPCMPFs位于7.0 × 7.0 × 10.5 cm盒子中，将预冷葡萄在-1-0°C保持在5°C的储存时间从28.7分钟延长至229.1分钟，展示了在冷链中的重要应用前景后勤。