中国造纸2025，Vol.44Issue(3)：1-9,84,10.DOI:10.11980/j.issn.0254-508X.2025.03.001
纤维素基复合相变储能材料的制备及相变性能研究
Preparation and Phase Transition Properties of Cellulose-based Composite Phase Change Energy Storage Materials
摘要
Abstract
In order to overcome the problem that hydrated salt phase change materials are prone to leakage during the energy storage phase change process,in this study,aerogel carrier(MFC/PVA/G)with porous structure were prepared from microfibrillated cellu-lose(MFC),polyvinyl alcohol(PVA),and graphene(G)by using freeze-drying technology,and after loading the phase change ma-terial Na2SO4·10H2O based on vacuum impregnation method,composite phase change energy storage materials(MFC/PVA/G-PCM).The results showed that the MFC/PVA/G had good loading effect on Na2SO4·10H2O with excellent dimensional stability and anti-leak-age,and the thermal conductivity was improved by more than 150%compared with that of pure Na2SO4·10H2O.With the increase of PVA content,the specific surface area of MFC/PVA/G increased and the pore size decreased.Comparing with other MFC/PVA/G-PCM,when the mass ratio of MFC and PVA was 8∶2,the enthalpy of MFC8/PVA2/G-PCM was the largest,with the enthalpy of solidi-fication being 169.5 J/g and the enthalpy of melting being 217.8 J/g.In the range of 0～50℃,the enthalpy of solidification after 300 phase change cycles was not changed much,with the enthalpy of solidification being 165.6 J/g and the enthalpy of melting 170.3 J/g,which had good stability of phase change cycle.In addition,the introduction of 4%borax into Na2SO4·10H2O could sig-nificantly improve the energy storage phase change performance of MFC/PVA/G-PCM,resulting in an increase in the crystallisa-tion temperature and a decrease in the degree of supercooling(within the variation range of 1℃).关键词
纤维素/气凝胶/复合相变储能材料/相分离Key words
cellulose/aerogel/composite phase change energy storage materials/phase separation分类
轻工业引用本文复制引用
韩辰,王阳,杨仁党,程晨,郭晓慧..纤维素基复合相变储能材料的制备及相变性能研究[J].中国造纸,2025,44(3):1-9,84,10.基金项目
广东省基础与应用基础研究基金(2023A1515110431,2024A1515011654). （2023A1515110431,2024A1515011654）
