In this research, porous wood flour (WF) and a eutectic mixture of lauric acid (LA) and myristic acid (MA) were prepared as a form-stable phase change material (FSPCM) using a vacuum impregnation method. The effects of alkali (NaOH), cetyltrimethylammonium bromide, and complex salts (CS) on the pore size of the WF were investigated. The results showed that the CS-treated WF (CS-WF) achieved the maximum pore size and impregnation ratio. The characterization by Fourier-transform infrared spectrometer, X-ray photoelectron spectrometer, and X-ray diffractometer illustrated that the combination of the LA-MA eutectic mixture and the CS-WF was a physical combination. The differential scanning calorimetry results suggested that the optimum melting temperature and the latent heat of the CS-WF/LA-MA FSPCM were 33.1 °C and 98.2 kJ kg^–1, respectively. The maximum impregnation ratio of the LA-MA eutectic mixture into the CS-WF was 60.3%. In addition, the thermogravimetric analysis indicated that the CS-WF/LA-MA FSPCM had better thermal durability than the pure LA-MA. Moreover, the CS-WF/LA-MA FSPCM had excellent thermal reliability after 500 thermal cycles. Thus, the CS-treatment of the WF was considered an excellent modification method. The prepared CS-WF/LA-MA FSPCM has the potential for latent heat thermal energy storage applications in terms of the proper phase-transition properties.

中文翻译：

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形状稳定相变材料的改性多孔木粉/月桂酸-乳酸共晶混合物的制备与表征

在这项研究中，使用真空浸渍法制备了多孔木粉（WF）和月桂酸（LA）和肉豆蔻酸（MA）的共晶混合物，作为形状稳定的相变材料（FSPCM）。研究了碱（NaOH），十六烷基三甲基溴化铵和复合盐（CS）对WF孔径的影响。结果表明，经CS处理的WF（CS-WF）达到了最大孔径和浸渍率。通过傅立叶变换红外光谱仪，X射线光电子能谱仪和X射线衍射仪的表征表明，LA-MA共晶混合物和CS-WF的组合是物理组合。差示扫描量热法结果表明，CS-WF / LA-MA FSPCM的最佳熔融温度和潜热分别为33.1°C和98.2 kJ kg分别为^–1。LA-MA低共熔混合物向CS-WF的最大含浸率为60.3％。另外，热重分析表明，CS-WF / LA-MA FSPCM具有比纯LA-MA更好的热耐久性。此外，CS-WF / LA-MA FSPCM在500个热循环后具有出色的热可靠性。因此，WF的CS处理被认为是优良的改性方法。制备的CS-WF / LA-MA FSPCM就适当的相变特性而言，具有潜在的潜热热能存储应用潜力。