Pore characteristics and thermal conductivity enhancement of binary eutectic adsorbed into delignified wood for solar energy storage

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2024-10-06 DOI:10.1007/s10853-024-10304-4

Fan Yong, Hua Fei, Yuanlin Li, Yucheng Pan, Jiao Tan, Mengqian Guo

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引用次数: 0

Abstract

In this work, two binary carbon-based composite phase change materials consisting of paraffin (PW), lauric acid (LA) and tetradecanol (TD) were prepared. Delignified wood flour (DWF) was obtained through treatment with a mixture of NaOH and Na₂SO₃. The pore volumes of DWF and wood flour (WF) are 0.01049 and 0.008955 cm³/g, respectively, and the pore volume of DWF increased by 17.16%. The adsorption capacity of DWF for LA-PW and LA-TD reaches 50%, which is 10% higher than the adsorption capacity of WF for LA-PW and LA-TD. The thermal conductivities of LA-PW/DWF and LA-TD/DWF are 0.3762 and 0.3580 W/m k, respectively. The phase transition temperatures of LA-PW/DWF and LA-TD/DWF are 40.86 ℃ and 19.68 ℃, respectively. The phase transition latent heat for LA-PW/DWF and LA-TD/DWF is 88.86 J/g and 62.31 J/g, which are 33.61% and 26.18% higher than those of LA-PW/WF and LA-TD/WF, respectively. After 200 cycles, the maximum value of the change rate in phase transition temperature for LA-PW/DWF and LA-TD/DWF is less than 2.64%, and the peak shape remains consistent before and after the cycle, which have good thermal stability.

Graphical Abstract

The adsorption capacity of DWF obtained by alkali delignification of wood flour was enhanced. LA-PW and LA-TD were uniformly adsorbed in the pore structure of DWF by capillary force and surface tension. LA-PW/DWF and LA-TD/DWF have high phase transition latent heat and good thermal and stability.

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吸附在用于太阳能储存的木质素化木材中的二元共晶的孔隙特征和导热性能的提高

本研究制备了两种二元碳基复合相变材料，分别由石蜡（PW）、月桂酸（LA）和十四醇（TD）组成。木质素化木粉（DWF）是用 NaOH 和 Na2SO3 的混合物处理得到的。DWF 和木粉（WF）的孔隙体积分别为 0.01049 和 0.008955 cm3/g，DWF 的孔隙体积增加了 17.16%。DWF对LA-PW和LA-TD的吸附能力达到50%，比WF对LA-PW和LA-TD的吸附能力高10%。LA-PW/DWF 和 LA-TD/DWF 的导热系数分别为 0.3762 和 0.3580 W/m k。LA-PW/DWF 和 LA-TD/DWF 的相变温度分别为 40.86 ℃ 和 19.68 ℃。LA-PW/DWF 和 LA-TD/DWF 的相变潜热分别为 88.86 J/g 和 62.31 J/g，比 LA-PW/WF 和 LA-TD/WF 分别高出 33.61% 和 26.18%。循环200次后，LA-PW/DWF和LA-TD/DWF的相变温度变化率最大值均小于2.64%，且循环前后峰形保持一致，具有良好的热稳定性。在毛细管力和表面张力的作用下，LA-PW和LA-TD被均匀地吸附在DWF的孔隙结构中。LA-PW/DWF 和 LA-TD/DWF 具有较高的相变潜热和良好的热稳定性。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.