首页> 外文期刊>Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion >Preparation and properties of beta-cyclodextrin/4,4 '-diphenylmethane diisocyanate/polyethylene glycol (beta-CD/MDI/PEG) crosslinking copolymers as polymeric solid-solid phase change materials
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Preparation and properties of beta-cyclodextrin/4,4 '-diphenylmethane diisocyanate/polyethylene glycol (beta-CD/MDI/PEG) crosslinking copolymers as polymeric solid-solid phase change materials

机译:β-环糊精/ 4,4'-二苯基甲烷二异氰酸酯/聚乙二醇(β-CD/ MDI / PEG)交联共聚物的制备及性能

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摘要

Four beta-cyclodextrin/4,4'-diphenylmethane diisocyanate/polyethylene glycol (beta-CD/MDI/PEG) crosslinking copolymers with different crosslinking density were prepared and characterized as novel polymeric solid-solid phase change materials (SSPCMs) for thermal energy storage. In the SSPCMs, PEG acts as the phase change functional chain and beta-cyclodextrin (beta-CD) acts as the molecular framework. The results from wide-angle X-ray diffraction (WAXD) and polarizing optical microscopy (POM) show that the synthesized SSPCMs have good crystallization properties and spherocrystal morphology with smaller size than that of PEG. According to the results of differential scanning calorimetry (DSC) and thermo-gravimetry (TG) curves, the SSPCMs possess high phase change enthalpies, good reusability, thermal reliability and stability. It is concluded that the crosslinking density of SSPCMs is a crucial factor significantly influenced the free movement and crystallization of PEG segments, and then affects phase transition properties of SSPCMs. (C) 2015 Elsevier B.V. All rights reserved.
机译:制备了四种具有不同交联密度的β-环糊精/ 4,4'-二苯甲烷二异氰酸酯/聚乙二醇(β-CD/ MDI / PEG)交联共聚物,并将其表征为新型的热固存储聚合物固-固相变材料(SSPCM) 。在SSPCM中,PEG充当相变功能链,而β-环糊精(β-CD)充当分子框架。广角X射线衍射(WAXD)和偏振光学显微镜(POM)的结果表明,合成的SSPCM具有良好的结晶特性和球晶形态,且尺寸小于PEG。根据差示扫描量热法(DSC)和热重法(TG)曲线的结果,SSPCM具有高相变焓,良好的可重用性,热可靠性和稳定性。结论是,SSPCMs的交联密度是一个重要因素,它显着影响PEG链段的自由运动和结晶,进而影响SSPCMs的相变性能。 (C)2015 Elsevier B.V.保留所有权利。

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