化工学报2025，Vol.76Issue(4)：1852-1862,11.DOI:10.11949/0438-1157.20240868
亲水改性硫酸镁/膨胀蛭石复合材料的吸附储热性能
Experimental investigation on hydrophilic functionalized MgSO4/expanded vermiculite composites for water adsorption and heat storage
摘要
Abstract
Two approaches were employed to prepare a novel high performance composite heat storage material by using expanded vermiculite,magnesium sulphate and Trilatone X-100 as the layered porous substrate,reactive salts,and hydrophilicmodifier,respectively.Two different modification methods were used in the study and the performance of the composites prepared by the two methods was compared.The test results of scanning electron microscopy(SEM)and X-ray diffractometer(XRD)showed that magnesium sulfate/expanded vermiculite modified composites were successfully synthesized.The influences of modification approach,mass of the added Trilatone X-100,and relative humidity on the adsorption performance of composite materials were discussed.Thermal gravimetric analyzer(TG)and differential scanning calorimeter(DSC)were utilized to measure energy storage density of the adsorbed composites,the results indicated that the hydrophilic functionalized composite fabricated by the modified expanded vermiculite with the mass ratio of expanded vermiculite to Trilatone X-100 of 10 and magnesium sulphate exhibited the best heat storage performance,whose water uptake,desorption rate,and heat storage density were improved by 2.5%,4.1%,and 9.1%,respectively,as compared to the non-functionalized one.After 10 cycles of adsorption-desorption testing,the water uptake of the hydrophilic functionalized composite was only reduced by 20.4%,showing favorable thermal stability.关键词
膨胀蛭石/硫酸镁/亲水改性/吸附/脱附/储热/传质Key words
expanded vermiculite/magnesium sulphate/hydrophilic modification/adsorption/desorption/heat storage/mass transfer分类
能源科技引用本文复制引用
晋伊浩,罗俊欣,胡章茂,王唯,殷谦..亲水改性硫酸镁/膨胀蛭石复合材料的吸附储热性能[J].化工学报,2025,76(4):1852-1862,11.基金项目
国家自然科学基金项目(52306069) （52306069）
湖南省自然科学基金项目(2024JJ5032,2023JJ40044) （2024JJ5032,2023JJ40044）
