Shape stabilized microcrystalline cellulose/methyl stearate/graphene nanoplatelet composite with enriched thermal conductivity and thermal energy storage/release performance

IF 4.9 2区工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD

Cellulose Pub Date : 2023-09-29 DOI:10.1007/s10570-023-05526-9

Gökhan Hekimoğlu, Esma Çakır, Ahmet Sarı, Osman Gencel, V. V. Tyagi, R. K Sharma

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Abstract

Recently, great effort has been made towards the preparation of seepage-free composite phase change materials for advanced thermal energy storage (TES) systems. Within this context, in this study, shape stabilized microcrystalline cellulose (MCC)/methyl stearate (MtS)/graphene nanoplatelet (GnP) composites as novel heat storage materials were produced by facile vacuum impregnation method. The effect of GnP on the MtS loading ratio in the composite structure as well as its effect on other properties such as chemical, latent heat, thermal stability, crystalline, morphological and heat storage–release performance were extensively studied. A high MtS loading rate of 65 wt% was achieved in the shape stabilized composite, in which the MCC–GnP hybrid structure was used as the supporting framework. This composite also offered the highest heat storage–release performance with a thermal conductivity value of 0.51 W/mK. The improved thermal conductivity was also confirmed by reductions in melting–freezing times and infrared thermal image capture analysis. DSC results showed that this composite melts at 35.32 °C with a melting enthalpy of 147.97 J/g. The proposed MC/MtS/GnP composite offered high thermal stability as well as excellent cycling stability after 1000 melt–freeze cycles. All test results suggest that the prepared MCC/MtS/GnP composites offer considerable potential for various low-temperature TES applications.

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形状稳定的微晶纤维素/硬脂酸甲酯/石墨烯纳米片复合材料，具有丰富的热导率和热能储存/释放性能

最近，人们在制备用于先进热能存储（TES）系统的无渗透复合相变材料方面做出了巨大的努力。在此背景下，本研究通过简单的真空浸渍方法制备了形状稳定的微晶纤维素（MCC）/硬脂酸甲酯（MtS）/石墨烯纳米片（GnP）复合材料作为新型储热材料。广泛研究了GnP对复合结构中MtS负载率的影响，以及它对其他性能的影响，如化学性能、潜热性能、热稳定性、结晶性能、形态性能和储热释放性能。在形状稳定的复合材料中，使用MCC–GnP混合结构作为支撑框架，实现了65wt%的高MtS负载率。该复合材料还具有最高的储热-散热性能，导热系数为0.51 W/mK。熔化-冷冻时间的减少和红外热图像捕获分析也证实了热导率的提高。DSC结果表明，该复合材料在35.32 °C，熔融焓为147.97 J/g。所提出的MC/MtS/GnP复合材料在1000次熔融-冷冻循环后提供了高的热稳定性和优异的循环稳定性。所有测试结果表明，所制备的MCC/MtS/GnP复合材料在各种低温TES应用中具有相当大的潜力。

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来源期刊

Cellulose 工程技术-材料科学：纺织

CiteScore

10.10

自引率

10.50%

发文量

580

审稿时长

3-8 weeks

期刊介绍： Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.