E-TPU composite material single-electrode friction nano-generator and preparation method thereof

Abstract

The invention discloses a preparation method of an E-TPU composite material single-electrode friction nano-generator, which comprises the following steps: 1) preparing TPU, general engineering plasticand a conductive filler, mixing the raw materials, uniformly stirring the raw materials, adding the mixture into an extruder, and carrying out melt mixing plasticization at a temperature 5-50 DEG C higher than the melting point of TPU; (2) after plasticizing is completed, carrying out underwater granulation or underwater brace granulation to produce TPU / general engineering plastic / conductive filler composite particles; and 3) putting the composite particles into a high-pressure reaction kettle, introducing a supercritical fluid, and carrying out pressure-maintaining permeation, pressure relief and foaming to obtain composite foam particles, thus making the product. The invention also discloses the single-electrode friction nano generator prepared by the preparation method. According to the prepared friction nano-generator, E-TPU and general engineering plastics form positive and negative friction materials, electron flow between a conductive network and the ground is caused by friction between the E-TPU and the general engineering plastics, voltage is generated, and each cell is a small friction nano-generator unit.

Description

technical field

[0001] The invention relates to the technical fields of new nanometer materials and new energy sources, in particular to an E-TPU composite material single-electrode friction nanogenerator and a preparation method thereof. Background technique

[0002] In order to alleviate the rapidly growing energy demand and reduce the environmental pollution caused by fossil energy, in 2012, Professor Wang Zhonglin from the Georgia Institute of Technology and the Beijing Institute of Nano Energy and Systems, Chinese Academy of Sciences, used the coupling effect of friction electrification and electrostatic induction to invent a low- A device that converts frequency mechanical energy into electrical energy - a triboelectric nanogenerator. It can convert various low-frequency and disordered mechanical energy in the surrounding environment into electrical energy, such as mechanical energy generated by tire rotation, wind energy, sound waves, water waves, human heartbeat, pul...

Examples

Embodiment 1

[0039] Physically mix and stir TPU:CNTs:PTFE at a mass ratio of 84:1:15 for 0.2h, then add it into a twin-screw extruder to fully melt, plasticize, extrude and granulate. The temperature of each section of the extruder is respectively the first zone 100°C, 110°C in the second zone, 130°C in the third zone, 145°C in the fourth zone, 160°C in the fifth zone and 170°C in the sixth zone, the twin-screw speed is 160r / min, the output is 10Kg / h, underwater production The particles are prepared into TPU / PTFE / CNTs composite particles with a particle size of about 3mm.

[0040] Put the TPU / PTFE / CNTs composite particles into a supercritical carbon dioxide reactor, and prepare E-TPU / PTFE / CNTs composite foam particles through supercritical carbon dioxide intermittent depressurization and temperature rise foaming process. The foaming process parameters are shown in Table 1 shown. The density of the composite foam particles obtained is 0.14g / cm 3 , pore size 10μm, conductive percolation va...

Embodiment 2

[0044] TPU: graphene (G): PA was physically mixed and stirred for 0.3h according to the mass ratio of 70:10:20, and then added to a twin-screw extruder to fully melt, plasticize, extrude and granulate, and the temperatures of each section of the extruder were respectively The first zone is 135°C, the second zone is 145°C, the third zone is 150°C, the fourth zone is 175°C, the fifth zone is 185°C and the sixth zone is 200°C, the twin-screw speed is 180r / min, and the output is 12Kg / h , and then underwater granulation to prepare TPU / G / PA composite particles with a particle size of about 4mm.

[0045] Put the TPU / G / PA composite particles in a supercritical nitrogen reactor, and prepare E-TPU / G / PA composite foam particles through supercritical nitrogen intermittent depressurization and temperature rise foaming process. The foaming process parameters are shown in Table 2 shown. The density of the prepared composite foam particles is 0.12g / cm 3 , pore size 20μm, conductive percolat...

Embodiment 3

[0049] Physically mix and stir TPU:CB:PC at a mass ratio of 98:4:6 for 0.1h, then add it into a twin-screw extruder to fully melt, plasticize, extrude and granulate, and the temperature of each section of the extruder is respectively the first zone 125°C, 130°C in the second zone, 155°C in the third zone, 175°C in the fourth zone, 195°C in the fifth zone, 205°C in the sixth zone, the twin-screw speed is 200r / min, the output is 15Kg / h, and then underwater The particles are prepared into TPU / CB / PC composite particles with a particle size of about 3mm.

[0050] Put TPU / CB / PC composite particles into supercritical carbon dioxide and nitrogen mixed gas reaction kettle, and prepare E-TPU / CB / PTFE composite foam particles through supercritical carbon dioxide and nitrogen mixed gas intermittent depressurization and temperature rise foaming process , The foaming process parameters are shown in Table 3. The density of the prepared composite foam particles is 0.15g / cm 3 , pore size 15μm...

technical field

[0001] The invention relates to the technical fields of new nanometer materials and new energy sources, in particular to an E-TPU composite material single-electrode friction nanogenerator and a preparation method thereof. Background technique

[0002] In order to alleviate the rapidly growing energy demand and reduce the environmental pollution caused by fossil energy, in 2012, Professor Wang Zhonglin from the Georgia Institute of Technology and the Beijing Institute of Nano Energy and Systems, Chinese Academy of Sciences, used the coupling effect of friction electrification and electrostatic induction to invent a low- A device that converts frequency mechanical energy into electrical energy - a triboelectric nanogenerator. It can convert various low-frequency and disordered mechanical energy in the surrounding environment into electrical energy, such as mechanical energy generated by tire rotation, wind energy, sound waves, water waves, human heartbeat, pul...

Examples

Embodiment 1

[0039] Physically mix and stir TPU:CNTs:PTFE at a mass ratio of 84:1:15 for 0.2h, then add it into a twin-screw extruder to fully melt, plasticize, extrude and granulate. The temperature of each section of the extruder is respectively the first zone 100°C, 110°C in the second zone, 130°C in the third zone, 145°C in the fourth zone, 160°C in the fifth zone and 170°C in the sixth zone, the twin-screw speed is 160r / min, the output is 10Kg / h, underwater production The particles are prepared into TPU / PTFE / CNTs composite particles with a particle size of about 3mm.

[0040] Put the TPU / PTFE / CNTs composite particles into a supercritical carbon dioxide reactor, and prepare E-TPU / PTFE / CNTs composite foam particles through supercritical carbon dioxide intermittent depressurization and temperature rise foaming process. The foaming process parameters are shown in Table 1 shown. The density of the composite foam particles obtained is 0.14g / cm 3 , pore size 10μm, conductive percolation va...

Embodiment 2

[0044] TPU: graphene (G): PA was physically mixed and stirred for 0.3h according to the mass ratio of 70:10:20, and then added to a twin-screw extruder to fully melt, plasticize, extrude and granulate, and the temperatures of each section of the extruder were respectively The first zone is 135°C, the second zone is 145°C, the third zone is 150°C, the fourth zone is 175°C, the fifth zone is 185°C and the sixth zone is 200°C, the twin-screw speed is 180r / min, and the output is 12Kg / h , and then underwater granulation to prepare TPU / G / PA composite particles with a particle size of about 4mm.

[0045] Put the TPU / G / PA composite particles in a supercritical nitrogen reactor, and prepare E-TPU / G / PA composite foam particles through supercritical nitrogen intermittent depressurization and temperature rise foaming process. The foaming process parameters are shown in Table 2 shown. The density of the prepared composite foam particles is 0.12g / cm 3 , pore size 20μm, conductive percolat...

Embodiment 3

[0049] Physically mix and stir TPU:CB:PC at a mass ratio of 98:4:6 for 0.1h, then add it into a twin-screw extruder to fully melt, plasticize, extrude and granulate, and the temperature of each section of the extruder is respectively the first zone 125°C, 130°C in the second zone, 155°C in the third zone, 175°C in the fourth zone, 195°C in the fifth zone, 205°C in the sixth zone, the twin-screw speed is 200r / min, the output is 15Kg / h, and then underwater The particles are prepared into TPU / CB / PC composite particles with a particle size of about 3mm.

[0050] Put TPU / CB / PC composite particles into supercritical carbon dioxide and nitrogen mixed gas reaction kettle, and prepare E-TPU / CB / PTFE composite foam particles through supercritical carbon dioxide and nitrogen mixed gas intermittent depressurization and temperature rise foaming process , The foaming process parameters are shown in Table 3. The density of the prepared composite foam particles is 0.15g / cm 3 , pore size 15μm...

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