Enhanced thermal conductivity of geopolymer nanocomposites by incorporating interface engineered carbon nanotubes. (April 2021)

• Record Type: Journal Article
• Authors: Zhu, Yuping; Qian, Yifan; Zhang, Ling; Bai, Ben; Wang, Xue; Li, Jiaqiang; Bi, Shuguang; Kong, Lijuan; Liu, Wanshuang; Zhang, Liying
• Is Part Of: Composites communications. Volume 24(2021)
• Publication Date: 2021-04
• Subjects: Geopolymer -- Interfaces -- Nanocomposites -- Thermal conductivity
• DOI: 10.1016/j.coco.2021.100691
• Languages: English
• ISSNs: 2452-2139

Abstract

Abstract: In this work, thermally conductive geopolymer (GP) nanocomposites were developed by incorporating silica-coated multi-walled carbon nanotubes (SiO2 -CNT) into GP matrix. The SiO2 layer not only improved the dispersion of CNT, but also alleviated the modulus mismatch between CNT and GP. As a result, the thermal conductivity of GP nanocomposites containing 5 vol% of SiO2 -CNT increased by 71.7% compared with neat GP. The enhancement proved the feasibility of making GP nanocomposites for use in areas where thermal conductivity was desired. Highlights: Thermally conductive geopolymer nanocomposites were developed via interface engineering. The thermal conductivity was improved by incorporating SiO2 -coated CNT into geopolymer matrix. The SiO2 coating created an effective thermal conduction path and reduced the interfacial thermal resistance.