The inorganic phase change material (PCM) is a promising energy storage material in the construction field because of their characteristics, such as high latent heat, low price and nonflammability. However, from the perspective of construction engineering applications, conventional inorganic phase change materials have some inherent performance defects, such as high phase change temperature, phase separation and leakage. To overcome these performance deficiencies, a novel eutectic hydrated salt/polymer hydrogel composite form-stable phase change material (HP-FSPCM) suitable for building thermal storage was developed, which used Na₂SO₄·10H₂O–Na₂CO₃·10H₂O eutectic salt (SCES) as PCM, sodium polyacrylate (PAAS) as thickener and packaging material, borax as nucleating agent and flake graphite as thermal conductivity enhancer. The phase change temperature and crystal structure characteristics of SCES were analyzed by means of step cooling curve method and X-ray diffraction technique (XRD). The microstructure and thermal properties of HP-FSPCM were tested and analyzed by scanning electron microscopy (SEM), differential scanning calorimeter (DSC) and transient planar thermal conductivity instrument. The test results showed that the cross-linked network formed by PAAS can eliminate the phase separation and leakage of SCES, and the latent heat value, melting temperature and crystallization temperature of HP-FSPCM were 165.5 J/g, 22.4 °C and 13.8 °C, respectively. The thermal cycle reliability of HP-FSPCM was tested, the latent heat loss of HP-FSPCM was only 2.2% after 300 thermal cycles.

无机相变材料（PCM）具有潜热高、价格低廉、不易燃等特点，在建筑领域是一种很有前景的储能材料。然而，从建筑工程应用的角度来看，常规无机相变材料存在一些固有的性能缺陷，如相变温度高、相分离和渗漏等。为了克服这些性能缺陷，开发了一种适用于建筑蓄热的新型共晶水合盐/聚合物_{水凝胶复合形态稳定相变材料（HP-FSPCM），该材料使用Na 2}SO₄·10H₂O–Na₂CO₃· 10H₂共晶盐 (SCES) 作为 PCM，聚丙烯酸钠 (PAAS) 作为增稠剂和包装材料，硼砂作为成核剂，鳞片石墨作为导热增强剂。采用阶梯冷却曲线法和X射线衍射技术(XRD)分析了SCES的相变温度和晶体结构特征。采用扫描电子显微镜（SEM）、差示扫描量热仪对HP-FSPCM的微观结构和热性能进行测试和分析(DSC) 和瞬态平面热导仪。测试结果表明，PAAS形成的交联网络可以消除SCES的相分离和泄漏，HP-FSPCM的潜热值、熔融温度和结晶温度分别为165.5 J/g、22.4℃和13.8℃。 C，分别。对HP-FSPCM的热循环可靠性进行了测试， 300次热循环后HP-FSPCM的潜热损失仅为2.2%。