Method for improving surface properties of wood by using silicon dioxide
A silica and wood surface technology, applied in the direction of wood impregnation, impregnated wood, wood processing utensils, etc., can solve the problems of easy agglomeration of silica, unsatisfactory function improvement effect, etc., and achieve the improvement of wood surface properties and aging resistance The effect of improvement and fast response process
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Embodiment 1
[0019] 1. Add 1g of powdered nano-silica (50 nm in diameter, the same below) directly into 100g of the commercially available Huarun Jiayuan polyurethane paint coating, and press the polyurethane paint (the film-forming material is polyurethane resin): curing Agent (isocyanate group): diluent (thina water) = 1:0.5:1 preparation, stir until uniform;
[0020] 2. Paint the wood surface according to the wood texture, and apply 3 times for each test piece to make the wood fully absorb the silica polyurethane paint. Place the specimen at room temperature for 10 days after painting;
[0021] 3. The abrasion resistance of the improved wood surface paint film is reduced, the abrasion is increased from 0.301g to 0.299g; the adhesion is increased from level 2 to level 1, the maximum impact resistance is increased from 10mm to 50mm, and the gloss is reduced from 48% To 18.67%; after 6 cycles of aging test, the anti-aging ability increased by 1.07 times.
Embodiment 2
[0023] 1. Add 2g of powdered nano-silica directly to 100g of commercially available Huarun Jiayuan polyurethane paint coating, prepare according to the method of Example 1, and stir until uniform;
[0024] 2. The method of painting the wood surface and placing the specimen at room temperature are the same as in Example 1;
[0025] 3. The abrasion resistance of the improved wood surface paint film is reduced, the abrasion is increased from 0.301g to 0.423g; the adhesion is increased from level 2 to level 1, the maximum impact resistance is increased from 10mm to 100mm; the gloss is reduced from 48% To 5.86%; after 6 cycles of aging test, the anti-aging ability increased by 1.3 times.
Embodiment 3
[0027] 1. First put the powdered nano SiO 2 Dry for 3h at 200℃, then take 5g of dried SiO 2 Disperse it together with 0.75ml of KH-570 in a glass reactor containing 150ml of toluene solution, heat and stir under reflux for 5 hours, control the heating temperature to be about 110°C, and the rotation speed to be 150 rpm. After the reaction is over, stop the reaction and cool, use a rotary evaporator for centrifugation, and wash several times with absolute ethanol until the toluene solution is washed away, then dry, and finally get modified SiO 2 ;
[0028] 2. Add 1.5g of modified powdered nano-silica into 100g of polyurethane paint coating, prepare according to the method of Example 1, and stir until uniform;
[0029] 3. The method of painting the wood surface and placing the test piece at room temperature are the same as in Example 1;
[0030] 4. The abrasion resistance of the modified wood surface paint film has been improved, and the wear amount has been reduced from 0.301g to 0.193...
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Abstract
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