Preparation method for thermoplastic phenolic resin-based hollow carbon balls
A phenolic resin and thermoplastic technology, applied in the field of preparation of hollow carbon balls, can solve the problems of undiscovered process, cracking of carbon balls, simplicity, etc., and achieve the effects of simple process route, few process steps and high yield
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[0015] Example 1:
[0016] Prepare 1% (mass ratio) polyvinyl alcohol aqueous solution at 25°C and stir it evenly. 100 g of phenolic resin particles (particle size: 20 mesh; softening point: 90° C.), 3 g of hexamethylene tetramine and 500 g of 1% (mass ratio) polyvinyl alcohol aqueous solution were simultaneously poured into the autoclave. Stir in the autoclave at a rate of 400 rpm and heat to 110° C. at a temperature increase rate of 1° C. / min, and then keep the temperature constant for 0.5 hours. Naturally cool, filter, wash, and dry at 110°C. Put 100g of the hollow phenolic resin ball obtained above in a carbonization activation furnace, and use nitrogen as a protective gas to heat to 800°C at a heating rate of 1°C / min, and then set it at a constant temperature of 0.1m 3 / h flow rate through the water vapor activated resin ball for 0.5 hours. Naturally cooled to room temperature, a hollow carbon ball (sphericity: 95%, hollowness: 85%, ball diameter: 1.5mm, specific surface...
Example Embodiment
[0017] Example 2:
[0018] Prepare a 3% (mass ratio) sodium dodecyl sulfonate aqueous solution at 30°C and stir it evenly. 100g of phenolic resin particles (particle size: 30 mesh; softening point: 95°C), 5g of hexamethylenetetramine and 1000g of 3% (mass ratio) polyvinyl alcohol aqueous solution were simultaneously poured into the autoclave. In the autoclave, it was stirred at 450 rpm and heated to 115° C. at a temperature increase rate of 1.5° C. / min, and then kept at a constant temperature for 1 hour. Naturally cool, filter, wash, and dry at 110°C. Put 100g of the hollow phenolic resin ball obtained above into a carbonization activation furnace, using nitrogen as a protective gas, heating to 810°C at a heating rate of 2°C / min, and then heating at a constant temperature of 0.3 m 3 / h flow rate through the water vapor to activate the resin ball for 3 hours. Naturally cooled to room temperature, a hollow carbon ball (sphericity: 95.5%, hollowness: 82%, ball diameter: 1.2mm, spe...
Example Embodiment
[0019] Example 3:
[0020] Prepare a 5% (mass ratio) methylpentanol aqueous solution at 35°C and stir evenly. Pour 100 g of phenolic resin particles (particle size: 40 mesh; softening point: 80°C), 7 g of NL curing agent and 800 g of 5% (mass ratio) polyvinyl alcohol aqueous solution into the autoclave at the same time. In the autoclave, it was stirred at a rate of 380 rpm and heated to 110° C. at a heating rate of 0.5° C. / min, and then kept at a constant temperature for 1.5 hours. Naturally cool, filter, wash, and dry at 110°C. Put 100g of the hollow phenolic resin ball obtained above into a carbonization activation furnace with nitrogen as a protective gas, and heat it to 820°C at a heating rate of 2.5°C / min, and then set it at a constant temperature of 0.5m 3 / h flow rate through the water vapor to activate the resin ball for 2 hours. Naturally cooled to room temperature, a hollow carbon ball (sphericity: 97%, hollowness: 76%, ball diameter: 0.9mm, specific surface area: 790...
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