Surface coating of bamboo fibres and its effects on the mechanical properties of casting polyurethane elastomer

NING Chunping; YI Yuhua

doi:10.13801/j.cnki.fhclxb.20201113.001

Volume 38 Issue 8

Aug. 2021

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NING Chunping, YI Yuhua. Surface coating of bamboo fibres and its effects on the mechanical properties of casting polyurethane elastomer[J]. Acta Materiae Compositae Sinica, 2021, 38(8): 2715-2723. doi: 10.13801/j.cnki.fhclxb.20201113.001

Citation:

NING Chunping, YI Yuhua. Surface coating of bamboo fibres and its effects on the mechanical properties of casting polyurethane elastomer[J]. Acta Materiae Compositae Sinica, 2021, 38(8): 2715-2723. doi: 10.13801/j.cnki.fhclxb.20201113.001

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Surface coating of bamboo fibres and its effects on the mechanical properties of casting polyurethane elastomer

doi: 10.13801/j.cnki.fhclxb.20201113.001

NING Chunping,
YI Yuhua^,

School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510640, China

Received Date: 2020-08-20
Accepted Date: 2020-10-28

Available Online: 2020-11-16

Publish Date: 2021-08-15

Abstract

Abstract

The coated bamboo fibres (PUBF) were obtained by using high-reactivity polyurethane (PU) coating agent to coat bamboo fibres (BF), and the mass fraction of isocyanate group (—NCO) in PU coating agent was 14.5wt%. The PUBF/PU casting elastomer composites were prepared by in-stiu polymerization. The BF and PUBF were characterized by FTIR, SEM, XRD and contact angle testing. The results show that the surface of the BF is successfully coated by a thin layer of PU terminated with reactive amino groups (—NH₂), which improves the interface compatibility and interfacial bonding between the BF and the casting PU. When the mass fraction of PUBF in the composite is 3wt%, the viscosity of the prepolymer at 80℃ is only 2.2 Pa·s, which is close to the viscosity of the pure PU. The tensile and tear strengths of the corresponding PUBF/PU composite are 38.0 MPa and 82.9 kN/m, respectively, improved by 51.6% and 25.6% compared with the pure casting PU. The BF pre-coated by high-reactivity PU coating agent is suitable for preparing the PUBF/PU composite.
- surface treatments,
- bamboo fibres,
- polyurethane,
- composites,
- viscosity,
- mechanical properties
Long Abstrsct
Innovation Points

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References(23)

References

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