Dual Bio-Inspired Design of Highly Thermally Conductive and Superhydrophobic Nanocellulose Composite Films

In this study, thermally conductive composite films were fabricated using an anisotropic boron nitride (BN) and hybrid filler system mixed with spherical aluminum nitride (AlN) or aluminum oxide (Al2O3) particles in a polyimide matrix. The hybrid system yielded a decrease in the through-plane thermal conductivity, however an increase in the in-plane thermal conductivity of the BN composite, resulting from the horizontal alignment and anisotropy of BN. The behavior of the in-plane thermal conductivity was theoretically treated using the Lewis–Nielsen and modified Lewis–Nielsen theoretical prediction models. A single-filler system using BN exhibited a relatively good fit with the theoretical model. Moreover, a hybrid system was developed based on two-population approaches, the additive and multiplicative. This development represented the first ever implementation of two different ceramic conducting fillers. The multiplicative-approach model yielded overestimated thermal conductivity values, whereas the additive approach exhibited better agreement for the prediction of the thermal conductivity of a binary-filler system.

Download Full-text

Thermally conductive composite films of hexagonal boron nitride and polyimide with affinity-enhanced interfaces

Journal of Materials Chemistry ◽

10.1039/b924997d ◽

2010 ◽

Vol 20 (14) ◽

pp. 2749 ◽

Cited By ~ 255

Author(s):

Kimiyasu Sato ◽

Hitomi Horibe ◽

Takashi Shirai ◽

Yuji Hotta ◽

Hiromi Nakano ◽

...

Keyword(s):

Boron Nitride ◽

Hexagonal Boron Nitride ◽

Composite Films ◽

Conductive Composite ◽

Thermally Conductive

Download Full-text

Sandwich structured RGO/CNF/RGO composite films for superior mechanical and thermally conductive properties

Cellulose ◽

10.1007/s10570-020-03150-5 ◽

2020 ◽

Vol 27 (9) ◽

pp. 5055-5069

Author(s):

Bo Shan ◽

Yuzhu Xiong ◽

Yihang Li ◽

Hang Yang ◽

Yuanfu Chen

Keyword(s):

Composite Films ◽

Thermally Conductive ◽

Conductive Properties

Download Full-text

Incorporating MXene into Boron Nitride/Poly(Vinyl Alcohol) Composite Films to Enhance Thermal and Mechanical Properties

Polymers ◽

10.3390/polym13030379 ◽

2021 ◽

Vol 13 (3) ◽

pp. 379

Author(s):

Seonmin Lee ◽

Jooheon Kim

Keyword(s):

Mechanical Properties ◽

Thermal Conductivity ◽

Boron Nitride ◽

Composite Film ◽

Vinyl Alcohol ◽

Composite Films ◽

Poly Vinyl Alcohol ◽

Thermal And Mechanical Properties ◽

Conduction Path ◽

Thermally Conductive

Aggregated boron nitride (ABN) is advantageous for increasing the packing and thermal conductivity of the matrix in composite materials, but can deteriorate the mechanical properties by breaking during processing. In addition, there are few studies on the use of Ti3C2 MXene as thermally conductive fillers. Herein, the development of a novel composite film is described. It incorporates MXene and ABN into poly(vinyl alcohol) (PVA) to achieve a high thermal conductivity. Polysilazane (PSZ)-coated ABN formed a heat conduction path in the composite film, and MXene supported it to further improve the thermal conductivity. The prepared polymer composite film is shown to provide through-plane and in-plane thermal conductivities of 1.51 and 4.28 W/mK at total filler contents of 44 wt.%. The composite film is also shown to exhibit a tensile strength of 11.96 MPa, which is much greater than that without MXene. Thus, it demonstrates that incorporating MXene as a thermally conductive filler can enhance the thermal and mechanical properties of composite films.

Download Full-text