Preparation and thermally conductive properties of functionalized boron nitride nanosheets/polyurethane composites with double heat-conduction networks

SHI Lin; MA Zhonglei; JING Jiayao; XIANG Xiaolian; LI Zhen; LI Yuntao

doi:10.13801/j.cnki.fhclxb.20211028.007

Volume 39 Issue 10

Aug. 2022

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SHI Lin, MA Zhonglei, JING Jiayao, et al. Preparation and thermally conductive properties of functionalized boron nitride nanosheets/polyurethane composites with double heat-conduction networks[J]. Acta Materiae Compositae Sinica, 2022, 39(10): 4531-4539. doi: 10.13801/j.cnki.fhclxb.20211028.007

Citation:

SHI Lin, MA Zhonglei, JING Jiayao, et al. Preparation and thermally conductive properties of functionalized boron nitride nanosheets/polyurethane composites with double heat-conduction networks[J]. Acta Materiae Compositae Sinica, 2022, 39(10): 4531-4539. doi: 10.13801/j.cnki.fhclxb.20211028.007

Citation:

SHI Lin, MA Zhonglei, JING Jiayao, et al. Preparation and thermally conductive properties of functionalized boron nitride nanosheets/polyurethane composites with double heat-conduction networks[J]. Acta Materiae Compositae Sinica, 2022, 39(10): 4531-4539. doi: 10.13801/j.cnki.fhclxb.20211028.007

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Preparation and thermally conductive properties of functionalized boron nitride nanosheets/polyurethane composites with double heat-conduction networks

doi: 10.13801/j.cnki.fhclxb.20211028.007

1.
College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi’an 710021, China
2.
College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Polymer Science and Technology, Northwestern Polytechnical University, Xi’an 710129, China

Received Date: 2021-08-26
Accepted Date: 2021-10-23
Rev Recd Date: 2021-10-04

Available Online: 2021-10-29

Publish Date: 2022-08-22

Abstract

Abstract

The development of polymer-based thermally conductive composites with low filling and high thermally conductivity remains a bottleneck problem that needs to be solved. Based on the layer-by-layer hydrogen-bond assembly, the low filling and high thermally conductive BNNS@PDA/PU composites are prepared by the dip coating-hot pressing method, using the porous polyurethane (PU) foams as template, and polydopamine functionalized nitride boron nanosheets (BNNS@PDA) as thermally conductive fillers. The microstructures, thermal conductive properties and thermal stability of BNNS@PDA and BNNS@PDA/PU composites were investigated in detail. The results show that the surface functionalization of BNNS by PDA can make it coat well on the three-dimensional skeleton of porous PU foams. After hot pressing, the highly effective double heat-conduction networks with the PU skeleton as the main heat-conduction network and BNNS@PDA on the surface of PU skeleton as the secondary heat-conduction network are constructed, leading to the decreased interfacial thermal resistance of the thermally conductive composites. When the filling amount of BNNS@PDA is 16.3wt%, the thermal conductivity of BNNS@PDA/PU composites with double heat-conduction networks reaches 0.783 W/(m·K), which is 102.3% higher than that of PU with single heat-conduction network (0.387 W/(m·K)).
- thermally conductive composites,
- double heat-conduction networks,
- porous polyurethane foams,
- functionalized nitride boron nanosheets,
- polydopamine
Long Abstrsct
Innovation Points

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References(22)

References

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