Pressure sensitive composite material used in flexible sensor and preparation method thereof
A pressure-sensitive composite material and flexible sensor technology, applied in the field of sensors, can solve the problems affecting the electrical conductivity and piezoresistive properties of the pressure-sensitive composite material, poor dispersion, etc., and achieve excellent processability, improved mechanical properties, and excellent aging resistance. Effect
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[0046] Example 1:
[0047] Combine 20g Ketjen carbon black ECP600JD, 5g carbon nanotubes, 20g nano SiO 2 And 40g of 2% silane coupling agent Si-69 were added to 115g of naphtha, stirred and ultrasonically dispersed for 30 minutes to form a dispersion. Add 450g of room temperature vulcanized silicone rubber Dow Corning 184 to the dispersion, magnetically stir at room temperature for 3 hours to form a viscous mixture. Place the mixture in a vacuum drying oven at 40°C for 20 minutes to remove bubbles and incompletely volatile naphtha. That is, an uncured pressure-sensitive composite material is prepared.
Example Embodiment
[0048] Example 2:
[0049] Combine 20g Ketjen carbon black ECP600JD, 5g carbon nanotubes, 5g nano SiO 2 And 10g of 2% silane coupling agent Si-69 were added to 85g of naphtha, stirred and ultrasonically dispersed for 30 minutes to form a dispersion. Add 350g room temperature vulcanized silicone rubber Dow Corning 184 to the dispersion, magnetically stir at room temperature for 3 hours to form a viscous mixture. Place the mixture in a vacuum drying oven at 40°C for 20 minutes to remove bubbles and incompletely volatile naphtha. That is, an uncured pressure-sensitive composite material is prepared.
Example Embodiment
[0050] Example 3:
[0051] Combine 75g Ketjen carbon black ECP600JD, 25g carbon nanotubes, 20g nano SiO 2 And 40g 2% silane coupling agent Si-69, add 25g n-hexane, 65g naphtha and 25g absolute ethanol mixed solution, stir and ultrasonically disperse for 60min to form a dispersion. Add 450g room temperature vulcanized silicone rubber Dow Corning 184 to the dispersion, magnetically stir at room temperature for 8 hours to form a viscous mixture. Place the mixture in a vacuum drying oven at 100°C for 30 minutes to remove bubbles and incompletely volatile solvents. Obtain an uncured pressure-sensitive composite material.
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