硫酸钠水合物在网络微区域中的相变机制(英文)
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Shenzhen Foundamental Research Program (JCYJ20120831180118531);Guangdong Innovative Research Team Program(2011D052);Shenzhen Peacock Pragram (KYPT20121228160843692);Shenzhen Electronic Packaging Materials (The Development and ReformCommission of Shenzhen【2012】372)

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    摘要:

    水合盐作为一种固-液相变材料因具有高的能量储存密度而备受关注。然而,其过冷和相分离的缺陷限制 了它的应用。为了解决过冷及相分离问题,文章提出了采用在硫酸钠饱和溶液中原位聚合的方法制备硅胶。根据 实验结果,硅胶中饱和硫酸钠水溶液的潜热为 238.1 J/g,相变温度为 30℃。通过添加这种添加剂,它可以在亚热 带春夏季时期承受长达五个月以上的冷热循环。通过扫描电子显微镜和傅里叶变换红外光谱检测发现,实验制备 的硅胶是无定型结构,并有一些小的晶体分布其中。实验推断,硅胶的添加提供了一种多孔结构,有助于硫酸钠 水合盐晶体的生长,因此,它可以抑制过冷和相分离的发生。

    Abstract:

    Hydrate salt is an attractive solid-liquid phase change material because of its high energy storage density. However, its applications have been limited owing to the supercooling and phase segregation. In order to solve these problems, we propose to make the silica gel in the saturated solution of sodium sulfate by means of in-situ polymerization. According to our experiments, the latent heat of saturated solution of sodium sulfate in silica gel is about 238.1 J/g and the phase change temperature is 30℃. With some surfactant, it can endure more than five months of heating-cooling cycles stably in subtropical spring and summer. Using scanning electron microscope and Fourier transformation infrared spectroscopy, we found that the microstructure of silica gel was mainly amorphous with some small crystals distributed in it. We believe that adding the silica gel produces a porous structure, which helps the crystal growth of sodium sulfate hydrate and hence, suppresses the supercooling and phase segregation.

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引文格式
吴晓琳,史 剑,符显珠,等.硫酸钠水合物在网络微区域中的相变机制(英文) [J].集成技术,2015,4(1):44-50

Citing format
WU Xiaolin, SHI Jian, FU Xianzhu, et al. Phase Change Mechanism of Confined Sodium Sulfate Hydrates in Micro Network Regions[J]. Journal of Integration Technology,2015,4(1):44-50

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  • 在线发布日期: 2015-01-28
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