TY - JOUR
T1 - Highly Thermally Conductive Polydimethylsiloxane Composites with Controllable 3D GO@f-CNTs Networks via Self-sacrificing Template Method
AU - Wang, Shuang Shuang
AU - Feng, Dian Ying
AU - Zhang, Zhi Ming
AU - Liu, Xia
AU - Ruan, Kun Peng
AU - Guo, Yong Qiang
AU - Gu, Jun Wei
N1 - Publisher Copyright:
© Chinese Chemical Society Institute of Chemistry, Chinese Academy of Sciences 2024.
PY - 2024/7
Y1 - 2024/7
N2 - Constructing controllable thermal conduction networks is the key to efficiently improve thermal conductivities of polymer composites. In this work, graphite oxide (GO) and functionalized carbon nanotubes (f-CNTs) are combined to prepare “Line-Plane”-like hetero-structured thermally conductive GO@f-CNTs fillers, which are then performed to construct controllable 3D GO@f-CNTs thermal conduction networks via self-sacrificing template method based on oxalic acid. Subsequently, thermally conductive GO@f-CNTs/polydimethylsiloxane (PDMS) composites are fabricated via casting method. When the size of oxalic acid is 0.24 mm and the volume fraction of GO@f-CNTs is 60 vol%, GO@f-CNTs/PDMS composites present the optimal thermal conductivity coefficient (λ, 4.00 W·m−1·K−1), about 20 times that of the λ of neat PDMS (0.20 W·m−1·K−1), also much higher than the λ (2.44 W·m−1·K−1) of GO/f-CNTs/PDMS composites with the same amount of randomly dispersed fillers. Meanwhile, the obtained GO@f-CNTs/PDMS composites have excellent thermal stability, whose λ deviation is only about 3% after 500 thermal cycles (20–200 °C).
AB - Constructing controllable thermal conduction networks is the key to efficiently improve thermal conductivities of polymer composites. In this work, graphite oxide (GO) and functionalized carbon nanotubes (f-CNTs) are combined to prepare “Line-Plane”-like hetero-structured thermally conductive GO@f-CNTs fillers, which are then performed to construct controllable 3D GO@f-CNTs thermal conduction networks via self-sacrificing template method based on oxalic acid. Subsequently, thermally conductive GO@f-CNTs/polydimethylsiloxane (PDMS) composites are fabricated via casting method. When the size of oxalic acid is 0.24 mm and the volume fraction of GO@f-CNTs is 60 vol%, GO@f-CNTs/PDMS composites present the optimal thermal conductivity coefficient (λ, 4.00 W·m−1·K−1), about 20 times that of the λ of neat PDMS (0.20 W·m−1·K−1), also much higher than the λ (2.44 W·m−1·K−1) of GO/f-CNTs/PDMS composites with the same amount of randomly dispersed fillers. Meanwhile, the obtained GO@f-CNTs/PDMS composites have excellent thermal stability, whose λ deviation is only about 3% after 500 thermal cycles (20–200 °C).
KW - Hetero-structured thermally conductive fillers
KW - Polydimethylsiloxane
KW - Self-sacrificing template
KW - Thermal conduction networks
UR - http://www.scopus.com/inward/record.url?scp=85185937546&partnerID=8YFLogxK
U2 - 10.1007/s10118-024-3098-4
DO - 10.1007/s10118-024-3098-4
M3 - 文章
AN - SCOPUS:85185937546
SN - 0256-7679
VL - 42
SP - 897
EP - 906
JO - Chinese Journal of Polymer Science (English Edition)
JF - Chinese Journal of Polymer Science (English Edition)
IS - 7
ER -