In order to study the preparation and properties of self-healing graphene quantum dots/polyurethane transparent composite film,a one-step method was used to prepare transparent polyurethane film (PU-DA) with thermal reversibility.The amino-modified graphene quantum dots (NH2-GQDs) were added through physical blenging,and the transparent self-healing graphene quantum dot/polyurethane composite film (NH2-GQDs/PU-DA) with fluorescence was finally prepared.Fourier infrared spectrometer (FT-IR),polarizing microscope and universal tension machine were used to analyze the structure and performance.The results showed that,with the introduction of Diels-Alder bond,the polyurethane films had self-healing properties at a certain temperature and still maintained good flexibility,and the optimal tensile strength and elongation at break reached 1.437MPa and 117.4%,respectively.The stress-strain test results showed that the addition of NH2-GQDs improved the mechanical properties of the polyurethane film to a certain extent,and increased the hydrophobicity of the polyurethane film.
Li Xinhua, Xiao Wenke, Zhang Xiaojuan, Hao Lingyun, Jin Rongtai, Cui Shan, Pan Xikai, Mao Yun
. Study on self-healing NH2-GQDs/PU-DA with thermal reversibility[J]. New Chemical Materials, 2021
, 49(3)
: 68
-71
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.03.016
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