Phase change materials (PCMs) have attracted great interest from researchers and have been widely developed in the field of solar thermal energy storage. Herein, a novel bio-based pomelo peel foam (PPF)/polyethylene glycol (PEG) composite PCM was designed and prepared via the simple impregnation process, which is further modified with low loading of MXene nanosheets for the purpose of improving its light-to-thermal conversion efficiency, thermal energy storage capability and thermal conductivity. With the incorporation of MXene nanosheets into PPF, the light-to-thermal conversion efficiency was improved obviously, the loading of PEG in form-stable composites phase change materials (FCPCMs) increased from 86.9 wt% (FCPCM-1) to 96.2 wt% (FCPCM-2, FCPCM-3 and FCPCM-4), and the thermal conductivity of obtained PPF@MXene/PEG FCPCMs was also improved (from 0.25 W/mK to 0.42 W/mK). It shows that the obtained PPF@MXene/PEG FCPCMs can be fully utilized in the field of solar thermal energy storage.

相变材料（PCM）引起了研究人员的极大兴趣，并且在太阳能储热领域得到了广泛的发展。本文中，通过简单的浸渍工艺设计和制备了一种新型的生物基柚皮泡沫（PPF）/聚乙二醇（PEG）复合PCM，并通过低载量的MXene纳米片对其进行了改性，以改善其光致强度。 -热转换效率，热能存储能力和热导率。通过将MXene纳米片材掺入PPF中，光热转换效率显着提高，形状稳定的复合相变材料（FCPCMs）中的PEG含量从86.9 wt％（FCPCM-1）增加到96.2 wt％ （FCPCM-2，FCPCM-3和FCPCM-4），所得PPF @ MXene / PEG FCPCM的导热系数也得到了改善（从0.25 W / mK提高到0.42 W / mK）。结果表明，所获得的PPF @ MXene / PEG FCPCM可以在太阳能储热领域得到充分利用。