新材料与新技术

石墨烯改性高导热相变大胶囊的制备与性能表征

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  • 1.江苏省特种设备安全监督检验研究院,国家石墨烯产品质量监督检验中心江苏,无锡214174;
    2.江南大学,无锡214122;
    3.江苏省食品先进制造装备技术重点实验室,无锡214122;
    4.中原工学院,郑州450007
区炳显(1983-),男,硕士,高级工程师,主要研究方向为新材料改性、机械制造及其自动化,E-mail:obxobx@163.com。

收稿日期: 2020-08-28

  修回日期: 2020-11-10

  网络出版日期: 2021-03-03

基金资助

江苏省特检院科研项目(KJ(Y)2017018)

Preparation and characterization of rGO modified phase change macrocapsule with high thermal conductivity coefficient

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  • 1. Special Equipment Safety Supervision Inspenction Institute of Jiangsu Provicne,National Graphene Products Quality Supervision and Inspection Center Jiangsu,Wuxi 214174;
    2. Jiangnan University,Wuxi 214122;
    3. Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology,Wuxi 214122;
    4. Zhongyuan University of Technology,Zhengzhou 450007

Received date: 2020-08-28

  Revised date: 2020-11-10

  Online published: 2021-03-03

摘要

为了提升相变大胶囊导热性能,拓展相变材料应用范围,通过将石墨烯与海藻酸钠、相变微胶囊共混,并由钙离子交联后制得石墨烯改性相变大胶囊。通过拉曼光谱、扫描电镜表征石墨烯改性相变大胶囊组分及微观结构,通过差式扫描量热仪分析其相变储能性能,并比较了石墨烯改性后样品导热系数的变化。结果表明:石墨烯改性相变大胶囊是由海藻酸钠凝胶连接成簇相变微胶囊,并由石墨烯穿插其中。制备的石墨烯改性相变大胶囊包覆率为58.8%~63.6%,相变潜热为112.5~121.7J/g范围内,石墨烯的添加对相变大胶囊包覆率、相变潜热及相变温度影响不显著。经过石墨烯改性后的相变大胶囊导热系数显著提升,但随着石墨烯添加量的增加其导热系数提升效果降低。所制石墨烯改性相变大胶囊在不显著改变其相变储热性能的同时提升了导热性能,提高了相变大胶囊的换热效率,为进一步开发高性能相变储能发泡材料提供了技术支持。

关键词: 石墨烯; 相变; 大胶囊

本文引用格式

区炳显, 王承康, 闫俊霞, 潘嘹, 卢立新, 韩鹏举 . 石墨烯改性高导热相变大胶囊的制备与性能表征[J]. 化工新型材料, 2021 , 49(2) : 72 -75 . DOI: 10.19817/j.cnki.issn 1006-3536.2021.02.017

Abstract

In order to improve the thermal conductivity of phase change macrocapsules and expand the application range of phase change materials,a graphene(rGO) modified phase change macrocapsule was prepared by blending graphene,phase change microcapsules and sodium alginate gel.The Raman spectrum and scanning electron microscope (SEM) were used to characterizing the component and micromorphology of the prepared macrocapsules,and also discussed the thermal storage and thermal conduction performances.The results indicated that the prepared macrocapsules were composed of phase change microcapsules and sodium alginate gel,and the rGO interspersed in the sodium alginate gel.The encapsulation rate of prepared macrocapsules was 58.8%~63.6%,the phase change latent heat was 112.5~121.7J/g.It can be observed that the thermal storage performance of macrocapsules was insignificantly affected by the blending of rGO.More importantly,the thermal conduction obviously increased with the increase of rGO content,although the improvement effect was degenerative.Thus,the prepared macrocapsules improved the thermal conduction of macrocapsules while the thermal storage performance was stable.The prepared macrocapsules will optimize thermal exchange efficiency of phase change materials,and provided a technical base for the development of phase change foam.

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