High thermal conductive and photothermal phase change material microcapsules via cellulose nanocrystal stabilized Pickering emulsion for solar harvesting and thermal energy storage.

IF 7.7 1区 化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY
Qiang Wei, Wang Sun, Zhe Zhang, Guofu Zhou, Zhen Zhang
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引用次数: 0

Abstract

Phase change materials (PCMs) are promising for thermal energy storage due to their high latent enthalpy and constant phase change temperature. However, organic PCMs suffer from leaking, low thermal conductivity, and flammability. Herein, high thermal conductivity, photothermal and flame-proof docosane microcapsules with melamine-formaldehyde (MF) and polypyrrole (PPy) (C22-CMFP) were reported with cellulose nanocrystal (CNC) stabilized Pickering emulsion droplets as templates through in-situ polymerization. CNCs showed outstanding C22 Pickering emulsifying ability with the presence of NaCl and provided ideal templates for C22 microcapsules. The obtained C22-CMFP microcapsules displayed high enthalpy (205.7 J/g), C22 core ratio (86.1 %), and stability. The C22-CMFP microcapsules retained an outstanding enthalpy remaining ratio (98.9 %) after 100 times cooling/heating cycles and could tolerate 100 °C for 12 h without leaking due to the robust hybrid CMFP shell. PPy significantly improved the thermal conductivity and photothermal conversion efficiency of C22-CMFP microcapsules. The C22-CMFP microcapsules exhibited a high thermal conductivity of 0.683 W/(m·K). The maximum temperature of C22-CMFP microcapsules under light irradiation for 18 min was 60.4 °C. Moreover, C22-CMFP microcapsules showed superb flame-proof properties. This study provides a facile approach to fabricate high enthalpy, stable, thermal conductive, photothermal, and flame-proof PCM microcapsules for solar harvesting and thermal energy storage.

利用纤维素纳米晶稳定皮克林乳液制备高导热光热相变材料微胶囊,用于太阳能收集和热能储存。
相变材料由于具有较高的潜在焓和恒定的相变温度,在储热方面具有广阔的应用前景。然而,有机pcm遭受泄漏,低导热性和可燃性。本文以纤维素纳米晶(CNC)稳定的Pickering乳滴为模板,通过原位聚合制备了三聚氰胺-甲醛(MF)和聚吡咯(PPy) (C22-CMFP)的高导热、光热、防火的十二烷微胶囊。CNCs在NaCl存在下表现出良好的C22皮克林乳化能力,为C22微胶囊的制备提供了理想的模板。所得C22- cmfp微胶囊具有较高的焓值(205.7 J/g)、C22芯比(86.1%)和稳定性。C22-CMFP微胶囊在100次冷却/加热循环后仍保持了出色的剩余焓比(98.9%),并且由于坚固的混合CMFP外壳,可以承受100°C 12 h而不泄漏。聚吡啶显著提高了C22-CMFP微胶囊的导热系数和光热转换效率。C22-CMFP微胶囊的热导率为0.683 W/(m·K)。C22-CMFP微胶囊在光照18 min下的最高温度为60.4℃。C22-CMFP微胶囊具有良好的隔爆性能。本研究提供了一种简单的方法来制造高焓、稳定、导热、光热和防火的PCM微胶囊,用于太阳能收集和热能储存。
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来源期刊
International Journal of Biological Macromolecules
International Journal of Biological Macromolecules 生物-生化与分子生物学
CiteScore
13.70
自引率
9.80%
发文量
2728
审稿时长
64 days
期刊介绍: The International Journal of Biological Macromolecules is a well-established international journal dedicated to research on the chemical and biological aspects of natural macromolecules. Focusing on proteins, macromolecular carbohydrates, glycoproteins, proteoglycans, lignins, biological poly-acids, and nucleic acids, the journal presents the latest findings in molecular structure, properties, biological activities, interactions, modifications, and functional properties. Papers must offer new and novel insights, encompassing related model systems, structural conformational studies, theoretical developments, and analytical techniques. Each paper is required to primarily focus on at least one named biological macromolecule, reflected in the title, abstract, and text.
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