1. Recyclable low-temperature phase change microcapsules for cold storage.
- Author
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Zhao, Jiaojiao, Long, Jinling, Du, Yongqiang, Zhou, Jiankui, Wang, Yadong, Miao, Zipeng, Liu, Yingliang, Xu, Shengang, and Cao, Shaokui
- Subjects
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COLD storage , *COPOLYMERIZATION - Abstract
Recyclable low-temperature phase change microcapsules (LTPCMs) have the potential applications in the short-distance cold chain transportation due to their reliable reusability in cold storage. Herein, LTPCMs are synthesized via in-situ suspension copolymerization of styrene and methyl methacrylate in absence of harm substances, providing the non-crosslinking copolymer shells. n -Dodecane, n -tridecane and n -tetradecane, inducing the microphase separation of non-crosslinking copolymers, are successfully encapsulated to achieve n -do-LTPCMs, n -tri-LTPCMs and n -tetra-LTPCMs, which respectively bear the high phase change enthalpy of 110.53 J·g−1 at −8.69 °C, 38.33 J·g−1/93.71 J·g−1 at −17.61 °C/−4.96 °C and 166.79 J·g−1 at 8.59 °C and subsequently show the cold-discharging periods of 30 min, 40 min and 120 min. The multiple circulation of cold-discharging process indicates the excellent recyclability for cold storage owing to their unchanged cold-discharging period. Especially, n -tetra-LTPCM-65 bears the best comprehensive cold-storing performance in all the previously reported LTPCMs, such as narrow cold-discharging temperature range of 3–4 °C, long cold-discharging period of 69–120 min and low cold-discharging capacity of 33.4 J·g−1·K−1. This work successfully provided the recyclable LTPCMs for cold storage in the short-distance cold chain transportation. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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