研究目的
The development of organic phase change materials (PCMs) with good shape stability, superior photothermal conversion efficiency, and high thermal conductivity for practical photothermal utilizations.
研究成果
The synthesized SPCMs exhibit high phase change enthalpies, superior photothermal conversion efficiency, and enhanced thermal conductivity. They also show satisfactory reversible stability and thermal stability, making them promising for solar-thermal conversion and storage applications.
研究不足
The study focuses on the integration of SWNTs?NH2 into PEG-based polyurethane PCM and its effects on photothermal conversion efficiency and thermal conductivity. Potential limitations include the scalability of the synthesis process and the long-term stability of the SPCMs under various environmental conditions.
1：Experimental Design and Method Selection:
The study involved the synthesis of amino-functionalized single-walled carbon nanotubes (SWNTs?NH2) and their integration into poly(ethylene glycol)-based polyurethane PCM to create form-stable solar-thermal conversion and storage materials (SPCMs). The methodology included nitric acid oxidation and amidation treatment for SWNTs functionalization and a polymerization process for SPCMs synthesis.
2：Sample Selection and Data Sources:
SWNTs (length, 1?3 μm; diameter, <2 nm; purity, >95%) were used as the base material for functionalization. PEG (Mn = 6000 g/mol) was selected as the phase change component.
3：List of Experimental Equipment and Materials:
Materials included SWNTs, PEG, MDI, DBT, DMF, and others. Equipment included a solar simulator, DSC, TG analyzer, and others.
4：Experimental Procedures and Operational Workflow:
The synthesis involved functionalizing SWNTs, preparing SPCMs via polymerization, and characterizing their properties through various tests including DSC, sunlight irradiation experiments, and thermal conductivity measurements.
5：Data Analysis Methods:
Data from DSC, sunlight irradiation experiments, and thermal conductivity tests were analyzed to evaluate the thermal properties, solar-thermal conversion efficiency, and thermal stability of the SPCMs.
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