An efficient shape-stabilized phase change material (PEG/CLMS) with improved thermal properties was prepared using carbon layer-modified mesoporous silica (CLMS) as the supporter of polyethylene glycol (PEG). The CLMS was fabricated based on dopamine biomimetic modification, which is facile, environmentally friendly and easy to use. The physical properties and chemical compatibility of PEG/CLMS were studied, and the results show that after the SBA-15 was modified by carbon layer, the phase change enthalpy of PEG/CLMS-b increased from 112.0 J/g to 129.9 J/g and the thermal conductivity increased from 0.34 W/(m·K) to 0.43 W/(m·K). Moreover, the PEG/CLMS-b had favourable thermostability and thermal reliability. The carbon layer modification method reported in this paper has great potential in practical applications for thermal energy storage. The thermal property improvement method developed in this study could also be used for shape-stabilized phase change materials (ssPCMs) prepared using other carriers such as diatomite and palygorskite. Therefore, a universal method was developed to improve the thermal properties of ssPCMs in this study.

中文翻译：

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PEG的碳层改性介孔二氧化硅载体改善复合相变材料的热性能

使用碳层修饰的介孔二氧化硅 (CLMS) 作为聚乙二醇 (PEG) 的载体制备了一种具有改进热性能的有效形状稳定相变材料 (PEG/CLMS)。CLMS 是基于多巴胺仿生修饰制造的，具有简便、环保且易于使用的特点。研究了PEG/CLMS的物理性质和化学相容性，结果表明SBA-15经碳层改性后，PEG/CLMS-b的相变焓从112.0 J/g增加到129.9 J/g热导率从0.34 W/(m·K)提高到0.43 W/(m·K)。此外，PEG/CLMS-b 具有良好的热稳定性和热可靠性。本文报道的碳层改性方法在热能储存的实际应用中具有巨大的潜力。本研究中开发的热性能改进方法也可用于使用其他载体（如硅藻土和坡缕石）制备的形状稳定相变材料 (ssPCMs)。因此，本研究开发了一种通用方法来改善 ssPCMs 的热性能。