首页|微胶囊/脱硫石膏相变储能复合材料的制备与性能

微胶囊/脱硫石膏相变储能复合材料的制备与性能

Preparation and properties of phase change energy storage composite with microcapsules and desulfurized gypsum

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以相变微胶囊(MPCM)为储能基元与脱硫石膏复合,研究了MPCM对脱硫石膏基复合材料力学性能、热性能和热循环稳定性的影响规律.结果表明:MPCM的潜热储能作用可调节料浆的水化温升,起到缓凝作用,同时赋予复合材料储能调温功效;然而掺入MPCM对复合材料强度不利.MPCM掺量为 50wt%时复合材料综合性能较好.此时,相变温度 24.51℃,相变焓 28.47 J·g-1,储热温峰和温峰出现时间较纯石膏分别降低和延迟了 6.4℃、980 s,储热控温作用明显;导热系数 0.451 W·(m·K)-1;28天抗压强度 25.05 MPa;250次冷热循环质量损失率、相变温度变化率和相变焓变化率分别为 0.67%、0.08%和 2.3%,热循环稳定性良好.该复合材料力学性能、热性能和热循环稳定性良好,在建筑储能围护体系中应用前景广阔.
Micro-encapsulated phase change materials(MPCM)was used as energy storage elements and com-bined with desulfurized gypsum.Effects of MPCM on the mechanical properties,thermal properties and thermal cycle stability of desulfurized gypsum-based composites were investigated.Results show that the latent heat energy storage capacity of MPCM can not only adjust the hydration temperature rise of the slurry,but also gave the com-posite the power to store energy and regulate temperature.However,the addition of MPCM has a negative effect on the strength of the composite.When the MPCM content is 50wt%,the comprehensive properties of the composite are better.At this time,the phase transition temperature and enthalpy of the composite are 24.51℃and 28.47 J·g-1,respectively.The temperature peak during heat storage stage and the time to reach the peak temperature are reduced and delayed by 6.4℃and 980 s,when compared with pure gypsum.The effect of heat storage and tempera-ture control is obvious.The thermal conductivity of the composite is 0.451 W·(m·K)-1 and its 28 days compressive strength is 25.05 MPa.The mass loss rate,phase change temperature change rate and phase change enthalpy change rate of 250 cold hot cycles are 0.67%,0.08%and 2.3%,respectively,and the thermal cycle stability is good.Phase change energy storage gypsum has good mechanical properties,thermal properties and thermal cycle stability,and has broad application prospects in building envelope structure.

micro-encapsulated phase change materials(MPCM)building energy storagemechanical proper-tiesthermal propertiesthermal cycle stability

刘凤利、白建侠、刘俊华、李俏莉

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河南大学 循环与功能建材实验室,开封 475004

开封大学 土木建筑工程学院,开封 475004

相变微胶囊 建筑储能 力学性能 热性能 热循环稳定性

河南省科技攻关项目河南省高等学校重点科研项目固废资源化利用与节能建材国家重点实验室开放基金

21210231056521B560008SWR-2020-007

2024

10.13801/j.cnki.fhclxb.20231214.003

复合材料学报
北京航空航天大学 中国复合材料学会

复合材料学报

CSTPCD北大核心
影响因子：0.933
ISSN：1000-3851
年,卷(期)：2024.41(8)