储能科学与技术2024，Vol.13Issue(10)：3369-3375,7.DOI:10.19799/j.cnki.2095-4239.2024.0246
SSD/PAM-SA双网络复合相变水凝胶的制备及热性能研究
Preparation and thermal properties of SSD/PAM-SA dual-network composite phase change hydrogels
摘要
Abstract
To address the issue of poor stability in practical applications and expand the application range of inorganic hydrated salt phase change materials for low-and medium-temperature thermal energy storage,we designed a composite phase change material by coating a dual-network hydrogel composed of polyacrylamide and sodium alginate with Na2SO4·10H2O(sodium sulfate decahydrate,SSD).The resulting inorganic hydrated salt composite phase change material exhibited a phase change temperature range of 30-45℃ .The microstructure,chemical composition,crystal structure,and thermophysical properties of the phase change hydrogels were characterized using SEM,FT-IR,XRD,and DSC.The results demonstrated the successful encapsulation of SSD within the dual-network hydrogel,forming a composite phase change hydrogel with high thermal conductivity,shape stability,and excellent temperature control properties.At an SSD mass fraction of 70%,the melting enthalpy reached 123.91 J/g for the phase change hydrogel.After 500 thermal cycles,he latent heat of phase change and temperature remained stable for the phase change hydrogel,indicating good thermal cycle stability.This study effectively addressed concerns regarding the poor stability of inorganic hydrated salt-based phase change materials while providing new insights and theoretical data support for future applications in low-to medium-temperature thermal energy storage.关键词
十水硫酸钠/双网络水凝胶/相变材料/热性能Key words
sodium sulfate decahydrate/dual-network hydrogels/phase change material/thermal properties分类
通用工业技术引用本文复制引用
闫博康,李林峰,李元元,程晓敏..SSD/PAM-SA双网络复合相变水凝胶的制备及热性能研究[J].储能科学与技术,2024,13(10):3369-3375,7.基金项目
湖北省重点研发计划项目(2021BAA215). （2021BAA215）
