Fabrication and properties of lignin-reinforced self-healing polyurea elastomer

ZOU Jiali; YU Yunpeng; YAN Yuqing; SONG Yongming; FANG Yiqun; WANG Qingwen

doi:10.13801/j.cnki.fhclxb.20221227.001

Volume 40 Issue 10

Oct. 2023

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ZOU Jiali, YU Yunpeng, YAN Yuqing, et al. Fabrication and properties of lignin-reinforced self-healing polyurea elastomer[J]. Acta Materiae Compositae Sinica, 2023, 40(10): 5666-5677. doi: 10.13801/j.cnki.fhclxb.20221227.001

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ZOU Jiali, YU Yunpeng, YAN Yuqing, et al. Fabrication and properties of lignin-reinforced self-healing polyurea elastomer[J]. Acta Materiae Compositae Sinica, 2023, 40(10): 5666-5677. doi: 10.13801/j.cnki.fhclxb.20221227.001

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Fabrication and properties of lignin-reinforced self-healing polyurea elastomer

doi: 10.13801/j.cnki.fhclxb.20221227.001

1.
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
2.
School of Materials and Energy, South China Agricultural University, Guangzhou 510642, China

Funds: National Key R&D Program of China in 13th Five-Year Period (2019 YFD1101203); Natural Science Foundation of Heilongjiang Province (LH2022 C011)

Received Date: 2022-10-27
Accepted Date: 2022-12-20
Rev Recd Date: 2022-12-03

Available Online: 2022-12-29

Publish Date: 2023-10-15

Abstract

Abstract

The preparation of polymeric materials with good mechanical properties and efficient self-healing properties at room temperature has been a difficult challenge. Herein, a lignin-reinforced self-healing polyurea elastomer (T-L-PUA) was prepared by a two-step process (polyurea reaction and Schiff base reaction) using natural aromatic-based lignin as the reinforcing phase. The effects of lignin addition on the thermal, UV-blocking and mechanical properties of T-L-PUA were investigated and the self-healing property and recyclability based on dynamic reversible imine bonding (C=N) of T-L-PUA were analyzed. The results show that the thermal stability of T-L-PUA is significantly enhanced with the increase of lignin ratio, where the maximum increase of residual carbon is 16.6% compared with the sample without lignin. The low transmittance of T-L-PUA in the UV region (280-400 nm) helps to realize the UV-blocking function. Compared with the average transmittance of self-healing polyurea composite elastomer (T-PUA) (41.6%), the average transmittance of all T-L-PUAs is around 0.2%. The best mechanical property appears at 20% of lignin addition, and the corresponding tensile strength of T-L-PUA is 12.44 MPa, which is 937% higher than that of pure polyurea elastomer. T-L-PUA exhibits good self-healing properties. When T-L-PUA is repaired at room temperature for 48 h, the recovery efficiencies of tensile strength and elongation at break is above 91% and 92%, respectively. In addition, the T-L-PUA can also be recovered by the hot-pressing and solvent dissolution processes, and the mechanical properties remain largely unchanged after remolding.
- lignin,
- polyurea elastomer,
- self-healing property,
- imine bond,
- composites
Long Abstrsct
Innovation Points

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References(46)

References

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