Preparation method and application of polytetrafluoroethylene film for unmanned aerial vehicle
A technology of polytetrafluoroethylene film and polytetrafluoroethylene, which is applied in coatings, photovoltaic power generation, electrical components, etc., can solve the problem of low light transmittance of PTFE, difficulty in meeting power supply requirements, and limiting the single working time of drones, etc. problems, to achieve excellent high temperature resistance, increased light transmittance, and good mechanical properties
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Embodiment 1
[0030] (1) Mix kerosene with a mass ratio of 4:0.1 and sodium perfluorooctanoate evenly to form a composite solvent; in the kerosene, the content of isoparaffins is 90wt%, and the content of normal paraffins is 8wt%;
[0031] (2) Add the composite solvent of step (1) into the polytetrafluoroethylene powder, stir at a constant temperature of 14°C at a speed of 20r / min for 0.5h, and then mature in a nitrogen atmosphere at a constant temperature of 24°C for 10h , to get cooked material;
[0032] Wherein, the purity of the polytetrafluoroethylene powder is 99.9%, the crystallinity≤80%, the particle size is 0.1-0.2 μm, the molecular weight is 7 million, and the mass ratio of the polytetrafluoroethylene powder to the kerosene in the composite solvent is 20 : 1;
[0033] (3) Carry out compression molding treatment to the clinker of step (2), the pressure of pre-compression molding is 40MPa, the pre-compression time is 5.5min, and hold pressure 5min;
[0034] (4) heat-treat the fini...
Embodiment 2
[0043] (1) mixing kerosene and toluene with a mass ratio of 5:0.1 to form a composite solvent; in the kerosene, the content of isoparaffins is 86wt%, and the content of normal paraffins is 11wt%;
[0044] (2) Add the composite solvent of step (1) to the polytetrafluoroethylene powder, stir at a constant temperature of 10°C at a speed of 50r / min for 0.5h, and then mature in a nitrogen atmosphere at a constant temperature of 32°C for 12h , to get cooked material;
[0045] Wherein, the purity of the polytetrafluoroethylene powder is 99.9%, the crystallinity≤80%, the particle size is 0.1-0.2 μm, the molecular weight is 10 million, and the mass ratio of the polytetrafluoroethylene powder to the kerosene in the composite solvent is 25 : 1;
[0046] (3) Carry out compression molding treatment to the clinker of step (2), the pressure of pre-compression molding is 65MPa, the pre-compression time is 10min, and hold pressure 12.5min;
[0047] (4) heat-treat the finished product of step...
Embodiment 3
[0056] (1) mixing kerosene and polyalkenyl succinimide with a mass ratio of 4.5: 0.1 to form a composite solvent, then adding bisphenol A epoxy resin to the composite solvent to obtain a mixture;
[0057] Wherein, the mass ratio of the bisphenol A type epoxy resin and the kerosene in the composite solvent is 2:5; in the kerosene, the content of isoparaffins is 87wt%, and the content of normal paraffins is 9wt%;
[0058] (2) Add the mixture of step (1) to the polytetrafluoroethylene powder, stir at a constant temperature of 18°C at a speed of 80r / min for 0.5h, and then mature in a nitrogen atmosphere at a constant temperature of 40°C for 8h , to get cooked material;
[0059] Wherein, the purity of the polytetrafluoroethylene powder is 99.9%, the degree of crystallinity≤80%, the particle size is 0.1-0.2 μm, the molecular weight is 8.5 million, and the mass ratio of the polytetrafluoroethylene powder to the kerosene in the composite solvent is 22.5 : 1;
[0060] (3) Carry out...
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