A series of polyethylene glycol (PEG) /methylcellulose (MC) composites with various PEG mass loading (10%-50 wt%) were prepared via physical blending method as a new type of form-stable composite phase change material (CPCM). The transimission, chemical compatibility, thermal and mechanical properties of form-stable PEG/MC CPCMs were characterized using polarized optic microscopy (POM), Fourier transform infrared (FT-IR) spectrometer, differential scanning calorimetry (DSC), thermal gravimetric analyzer (TGA), and mechanical tester. For PEG/MC composite membranes, the addition of PEG had some effects on the transparency of membranes. As the PEG content reaches 20% (mass fraction), the composites exhibited phase change energy storage capacity. When PEG content increase further, the fusion or solidification enthalpies of the composites raised gradually. The mechanic tests displayed that the fracture strength and elastic modulus of the PEG/MC composites reduced as the PEG loadings increased. While the elongation at break increased first and then decreased. The novel PEG/MC CPCM exhibited suitable thermal performances for latent heat energy storage.

通过物理共混法制备了一系列具有各种PEG质量负载（10％-50 wt％）的聚乙二醇（PEG）/甲基纤维素（MC）复合材料，作为新型的形状稳定复合相变材料（CPCM）。使用偏振光学显微镜（POM），傅立叶变换红外（FT-IR）光谱仪，差示扫描量热法（DSC），热重分析仪（TGA）对形状稳定的PEG / MC CPCM的透过率，化学相容性，热和机械性能进行了表征）和机械测试仪。对于PEG / MC复合膜，PEG的加入对膜的透明度有一定影响。当PEG含量达到20％（质量分数）时，复合材料表现出相变储能能力。当PEG含量进一步增加时，复合材料的熔融或凝固焓逐渐升高。力学测试表明，随着PEG含量的增加，PEG / MC复合材料的断裂强度和弹性模量降低。而断裂伸长率先增加然后减少。新颖的PEG / MC CPCM具有适合潜热能量存储的热性能。