| PVA 复合相变材料的制备及表征 |
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| 引用本文：韦雷,张燕,王继芬.PVA 复合相变材料的制备及表征[J].上海第二工业大学(中文版),2025,42(3):262-267 |
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| 基金项目:国家自然科学基金项目(51776116, 52176081), 上海科技基金(22010500600) 资助 |
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| 中文摘要:采用冻融法, 以聚乙烯醇(polyvinyl alcohol, PVA) 为基体, 在室温下与正二十烷(C20H42) 复合, 制备了PVA/C20H42 (PC) 系列复合物。通过扫描电子显微镜(SEM)、傅里叶变换红外吸收光谱仪(FTIR)、X 射线衍射仪(XRD)、差示扫描量热仪(differential scanning calorimetry, DSC) 及导热系数测试仪等多种手段, 对材料的微观结构和热性能进行了系统表征。结果表明, C20H42与PVA 在复合材料中为物理复合, 且C20H42的晶体结构与其纯物质相比未发生改变。该复合相变材料(phase change materials, PCMs) 具有优异的储热性能, 其储能密度达(167.20.4)J/g。导热系数测试表明, 复合PCMs 的导热性能随C20H42含量增加呈现先上升后下降的趋势, 较纯PVA最高提升达106%。所制备的复合PCMs在储热性能和导热性能方面表现出显著优势, 在储能和热管理领域具有广阔的应用潜力。 |
| 中文关键词:聚乙烯醇 相变材料 热导率 |
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| Preparation and Characterization of PVA Composite Phase Change Materials |
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| Abstract:By using polyvinyl alcohol (PVA) as the matrix and blending it with n-eicosane (C20H42) at room temperature, a series of PVA/C20H42(PC) composite materials were prepared by the freeze-thaw method. The microstructure and thermal properties of the materials were systematically characterised by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and thermal conductivity test. The results indicate that C20H42 and PVA are physically blended in the composite material, and the crystal structure of C20H42 remains unchanged compared to its pure form. The composite phase change materials (PCMs) have excellent thermal storage properties with an energy storage density of (167.20.4) J/g. Thermal conductivity tests show that the thermal conductivity of the composite PCMs exhibits a tendency to increase and then decrease with the increase of C20H42 contents, with a maximum enhancement of 106% compared with the pure PVA. The prepared composite PCMs show significant advantages in thermal storage performance and thermal conductivity, and have a broad application potential, in the field of energy storage and thermal management. |
| keywords:polyvinyl alcohol phase change materials thermal conductivity |
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