Preparation method and performance analysis of hydrogel for thermal management

doi:10.19491/j.issn.1001-9278.2025.05.003

Abstract

Abstract:

CS （chitosan）⁃， polyvinyl alcohol⁃， hyaluronic acid⁃， polyacrylamide⁃based hydrogels were prepared by using a blending method. Through comparing these hydrogels with the Slime hydrogel and deionized water， the thermal management performance of different hydrogels in the direction of heat insulation and heat preservation was investigated， and the hydrogel materials with excellent thermal management performance were selected in the scenarios at the temperatures with a less difference between the two sides. The results indicated that the CS⁃based hydrogel had the most excellent thermal insulation， thermal water locking， and flame⁃retardant performance. It could be used as a thermal management material in the scenarios at the temperatures with a less difference between the two sides. The thermal insulation mechanism of the CS⁃based hydrogel was also analyzed.

Key words: chitosan hydrogel, thermal insulation, thermal management material

CLC Number:

TQ320.7

LI Yajiao, LI Ning, QIU Siyuan, CHEN Yuanmin, WANG Wenhao, SUN Jingyao. Preparation method and performance analysis of hydrogel for thermal management[J]. China Plastics, 2025, 39(5): 18-24.

Figures/Tables 15

Fig.1. Preparation process of the CS hydrogel

Fig.2. Thermally managed hydrogel samples

Fig.3. （a） Synthesis mechanism，（b） cross⁃linking structure，（c） schematic diagram and （d） physical image of the CS hydrogel

Fig.4. Preparation process of the PVA hydrogel

Fig.5. Preparation mechanism of the PVA hydrogel

Fig.6. Schematic diagram of the thermal insulation performance test

Fig.7. Schematic diagram of the thermal water lock performance test

Fig.8. Microscopic morphology of the CS hydrogel

Fig.9. Hydrogel thermal insulation performance test results（hot plate temperature of 50 ℃）

Fig.10. Hydrogel thermal insulation performance test results（hot plate temperature of 60 ℃）

Fig.11. Hydrogel thermal insulation performance test results （hot plate temperature of 70 ℃）

Fig.12. Hydrogel state （a）before and （b） after crosslinking

Fig.13. Comparison of （a） initial，（b） heating for 20 s and （c） completely drying state of the hydrogel samples in 120 ℃ hot plate heating experiment

样品	td/min	md/g	热锁水能力
X1	67	0.06	很强
X2	28	0.13	较强
X3	20	0.22	一般
X4	42	0.02	强
X5	1	0	差

Tab.1. Water loss of various hydrogels under constant temperature hot plate heating at 120 ℃

Fig.14. Flame retardant performance of the CS hydrogel

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