Journal
JOURNAL OF POLYMERS AND THE ENVIRONMENT
Volume 30, Issue 12, Pages 5252-5262Publisher
SPRINGER
DOI: 10.1007/s10924-022-02586-z
Keywords
Self-healing; Waterborne polyurethane; DA reaction; Triboelectric nanogenerator
Categories
Funding
- National Natural Science Foundation of China [22268009, 22005067]
- Guangxi Natural Science Foundation Program [2019GXNSFBA185006, 2020GXNSFBA159023]
- Opening Project of Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization [HZXYKFKT202204]
- Key Laboratory of Clean Pulp and Papermaking and Pollution Control [2019ZR03]
- Open Funding Project of the State Key Laboratory of Biocatalysis and Enzyme Engineering [SKLBEE2020009]
- College of Light Industry and Food Engineering,Guangxi University
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A waterborne polyurethane (WPU) with excellent self-healing and recyclable properties was successfully prepared by introducing Diels-Alder (DA) reaction groups into it. The WPU-DA film showed high self-healing efficiency and could be used to prepare a triboelectric nanogenerator (TENG). The electrical output properties of the TENG could be restored to more than 90% of the original values after damage-healing.
A type of waterborne polyurethane (WPU) with excellent self-healing and recyclable properties was successfully prepared by introducing Diels-Alder (DA) reaction groups into it. FT-IR was used to verify the successful synthesis of samples and the retro-DA reaction in the WPU-DA films. It was found that the self-healing efficiency of the WPU-DA-4/4 films was 72.8%. After four cycle times, the self-healing efficiency could still achieve 49.7%. Moreover, the WPU-DA film could be applied as the positive friction layer to prepare a triboelectric nanogenerator (TENG). Working in contact-separation mode, the electrical outputs with 2 x 2 cm(2) area can reach 58 V, 3.2 mu A, 17.6 nC, respectively. It is also interesting to find that the electrical output properties of the TENG after damage-healed can be restored to more than 90% of the original one. The cross-linked WPU had good reprocessability and had great potential application prospects in intelligent materials.
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