Lignin graphene and preparation method thereof
A technology of lignin and graphene, applied in the direction of graphene, chemical instruments and methods, non-metallic elements, etc., can solve the problems of high preparation cost, low product quality, low controllability, etc., and achieve simple operation and easy access to raw materials , the effect of high application value
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Embodiment 1
[0017] Put the pine lignin into the ball mill for 18 hours, set the speed at 360r / min, rest for 0.5 hours every 1 hour of work, and dry in a drying oven at 105°C for 1~2 hours after the ball milling. Take 0.2g of dry lignin powder and place it in a mold, press it into thin slices at a pressure of 10MPa, then place the lignin flakes on a computer program-controlled XY workbench, and use a femtosecond laser to perform laser radiation at normal temperature and pressure. Among them, the laser wavelength of the femtosecond laser is 1030nm, the laser frequency is 120kHz, the pulse time is 150fs, the radiation conditions are laser power 800mW, the radiation time is 10min, the working speed is 5mm / s, graphene is obtained after radiation, and the four-probe tester Its sheet resistance was tested to be 5Ω / □.
[0018] The microstructure of graphene was analyzed by Raman spectroscopy and transmission electron microscopy, indicating that the method effectively prepared high-quality graphen...
Embodiment 2
[0021] Put the pine lignin into the ball mill for 18 hours, set the speed at 360r / min, rest for 0.5 hours every 1 hour of work, and dry in a drying oven at 105°C for 1~2 hours after the ball milling. Take 0.2g of dry lignin powder and place it in a mold, press it into thin slices at a pressure of 10MPa, then place the lignin flakes on a computer program-controlled XY workbench, and use a femtosecond laser to perform laser radiation at normal temperature and pressure. Among them, the laser wavelength of the femtosecond laser is 1030nm, the laser frequency is 120kHz, the pulse time is 150fs, the radiation conditions are laser power 400mW, the radiation time is 40min, the working speed is 80mm / s, graphene is obtained after radiation, and the four-probe tester Its sheet resistance was tested to be 579Ω / □.
Embodiment 3
[0023] Put the eucalyptus lignin into a ball mill for 12 hours, set the speed at 360r / min, rest for 0.5 hours every 1 hour of work, and dry in a drying oven at 105°C for 1~2 hours after the ball milling. Take 0.2g of dry lignin powder and place it in a mold, press it into thin slices at a pressure of 10 MPa, then place the lignin thin slices on a computer program-controlled XY workbench, and use a femtosecond laser to irradiate the laser at normal temperature and pressure. Among them, the laser wavelength of the femtosecond laser is 1030nm, the laser frequency is 120kHz, the pulse time is 150fs, the radiation conditions are laser power 100mW, the radiation time is 30min, the working speed is 30mm / s, graphene is obtained after radiation, and the four-probe tester Its sheet resistance was tested to be 106Ω / □.
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