Skip to main content
placeholder image

Coupled Chiral Structure in Graphene-Based Film for Ultrahigh Thermal Conductivity in Both In-Plane and Through-Plane Directions

Journal Article


Abstract


  • The development of high-performance thermal management

    materials to dissipate excessive heat both in plane and through plane

    is of special interest to maintain efficient operation and prolong the life of

    electronic devices. Herein, we designed and constructed a graphene-based

    composite film, which contains chiral liquid crystals (cellulose nanocrystals,

    CNCs) inside graphene oxide (GO). The composite film was prepared

    by annealing and compacting of self-assembled GO-CNC, which contains

    chiral smectic liquid crystal structures. The helical arranged nanorods of

    carbonized CNC act as in-plane connections, which bridge neighboring

    graphene sheets. More interestingly, the chiral structures also act as

    through-plane connections, which bridge the upper and lower graphene

    layers. As a result, the graphene-based composite film shows extraordinary

    thermal conductivity, in both in-plane (1820.4 W m−1 K−1) and throughplane

    (4.596 W m−1 K−1) directions. As a thermal management material,

    the heat dissipation and transportation behaviors of the composite film were investigated using a self-heating system and the

    results showed that the real-time temperature of the heater covered with the film was 44.5 °C lower than a naked heater. The

    prepared film shows a much higher efficiency of heat transportation than the commonly used thermal conductive Cu foil.

    Additionally, this graphene-based composite film exhibits excellent mechanical strength of 31.6 MPa and an electrical

    conductivity of 667.4 S cm−1. The strategy reported here may open a new avenue to the development of high-performance

    thermal management films.

Authors


  •   Meng, Xin (external author)
  •   Pan, Hui (external author)
  •   Zhu, Chengling (external author)
  •   Chen, Zhixin
  •   Lu, Tao (external author)
  •   Xu, Da (external author)
  •   Li, Yao (external author)
  •   Zhu, Shenmin (external author)

Publication Date


  • 2018

Citation


  • Meng, X., Pan, H., Zhu, C., Chen, Z., Lu, T., Xu, D., Li, Y. & Zhu, S. (2018). Coupled Chiral Structure in Graphene-Based Film for Ultrahigh Thermal Conductivity in Both In-Plane and Through-Plane Directions. Acs Applied Materials & Interfaces, 10 (26), 22611-22622.

Scopus Eid


  • 2-s2.0-85048482163

Number Of Pages


  • 11

Start Page


  • 22611

End Page


  • 22622

Volume


  • 10

Issue


  • 26

Place Of Publication


  • United States

Abstract


  • The development of high-performance thermal management

    materials to dissipate excessive heat both in plane and through plane

    is of special interest to maintain efficient operation and prolong the life of

    electronic devices. Herein, we designed and constructed a graphene-based

    composite film, which contains chiral liquid crystals (cellulose nanocrystals,

    CNCs) inside graphene oxide (GO). The composite film was prepared

    by annealing and compacting of self-assembled GO-CNC, which contains

    chiral smectic liquid crystal structures. The helical arranged nanorods of

    carbonized CNC act as in-plane connections, which bridge neighboring

    graphene sheets. More interestingly, the chiral structures also act as

    through-plane connections, which bridge the upper and lower graphene

    layers. As a result, the graphene-based composite film shows extraordinary

    thermal conductivity, in both in-plane (1820.4 W m−1 K−1) and throughplane

    (4.596 W m−1 K−1) directions. As a thermal management material,

    the heat dissipation and transportation behaviors of the composite film were investigated using a self-heating system and the

    results showed that the real-time temperature of the heater covered with the film was 44.5 °C lower than a naked heater. The

    prepared film shows a much higher efficiency of heat transportation than the commonly used thermal conductive Cu foil.

    Additionally, this graphene-based composite film exhibits excellent mechanical strength of 31.6 MPa and an electrical

    conductivity of 667.4 S cm−1. The strategy reported here may open a new avenue to the development of high-performance

    thermal management films.

Authors


  •   Meng, Xin (external author)
  •   Pan, Hui (external author)
  •   Zhu, Chengling (external author)
  •   Chen, Zhixin
  •   Lu, Tao (external author)
  •   Xu, Da (external author)
  •   Li, Yao (external author)
  •   Zhu, Shenmin (external author)

Publication Date


  • 2018

Citation


  • Meng, X., Pan, H., Zhu, C., Chen, Z., Lu, T., Xu, D., Li, Y. & Zhu, S. (2018). Coupled Chiral Structure in Graphene-Based Film for Ultrahigh Thermal Conductivity in Both In-Plane and Through-Plane Directions. Acs Applied Materials & Interfaces, 10 (26), 22611-22622.

Scopus Eid


  • 2-s2.0-85048482163

Number Of Pages


  • 11

Start Page


  • 22611

End Page


  • 22622

Volume


  • 10

Issue


  • 26

Place Of Publication


  • United States