Preparation and dielectric properties of silanized multi-walled carbon nanotubes/silicone rubber composites

ZHANG Zijing; LIU Chang; LI Ruhui; WU Chonggang; GONG Xinghou; HU Tao

doi:10.13801/j.cnki.fhclxb.20191113.004

Volume 37 Issue 7

Aug. 2020

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ZHANG Zijing, LIU Chang, LI Ruhui, et al. Preparation and dielectric properties of silanized multi-walled carbon nanotubes/silicone rubber composites[J]. Acta Materiae Compositae Sinica, 2020, 37(7): 1675-1683. doi: 10.13801/j.cnki.fhclxb.20191113.004

Citation:

ZHANG Zijing, LIU Chang, LI Ruhui, et al. Preparation and dielectric properties of silanized multi-walled carbon nanotubes/silicone rubber composites[J]. Acta Materiae Compositae Sinica, 2020, 37(7): 1675-1683. doi: 10.13801/j.cnki.fhclxb.20191113.004

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Preparation and dielectric properties of silanized multi-walled carbon nanotubes/silicone rubber composites

doi: 10.13801/j.cnki.fhclxb.20191113.004

Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-weight Materials and Processing, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China

Received Date: 2019-07-28
Accepted Date: 2019-10-12

Available Online: 2019-11-13

Publish Date: 2020-07-15

Abstract

Abstract

The three different silane coupling agents (methyltriethoxysilane (MTES), dimethyldiethoxysilane (DMDES) and trimethylethoxysilane (TMES)) were used to modify the surface of multi-walled carbon nanotubes (MWCNTs) under the hydrous conditions. The chemical structures of MWCNTs before and after modification were characterized by FTIR, XPS, TG and SEM. The different mass fractions of MWCNTs, MWCNTs-MTES, MWCNTs-DMDES and MWCNTs-TMES were filled in silicone rubber (SR). The MWCNTs/SR composites were prepared by mechanical blending. SEM images show that the silane modification can reduce the interaction between MWCNTs and improve their dispersion in SR. The tensile tests show that the interaction between MWCNTs and SR is enhanced and the compatibility between them is improved. The elastic modulus of the MWCNTs/SR composites shows no obvious change when the contents of modified MWCNTs are within 2wt%. The dielectric constant of MWCNTs/SR composite reaches 5.02 (at 10⁴ Hz) when filled with 2wt% modified MWCNTs-MTES, which is 57% higher than that of the pure SR, while the dielectric loss is still less than 0.01 (at 10⁴ Hz).
- silane coupling agents,
- multi-walled carbon nanotubes,
- silicone rubber,
- composites,
- dielectric properties
Long Abstrsct
Innovation Points

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References(31)

References

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