The Method of Improving the Performance of Carbonized Wood by Silica Sol Impregnation Pretreatment
A silica sol and pretreatment technology, applied in wood treatment, impregnated wood, wood treatment details, etc., can solve the problems of dimensional stability, corrosion resistance, weather resistance, flame retardancy, density, mechanical strength, etc. Decrease and other problems, to achieve the effect of improving mechanical strength, inhibiting the reproduction of fungi, and reducing the balance of moisture content
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Embodiment 1
[0023] 1) Selection of silica sol: The specifications of the selected silica sol: pH value is 7.20, SiO 2 The content is 35%, the density is 1.20g / cm 3 , the particle size range is 30-50nm.
[0024] 2) Wood impregnation pretreatment: Using vacuum pressure method, put 2.5cm thick rubber wood in the treatment tank, evacuate to -0.09MPa, keep it for 15min, then inject silica sol, after the treatment tank is full, pressurize to 1.0MPa, keep it for 1 hour, release the pressure, return the silica sol to the storage tank, evacuate it again to -0.08MPa, keep it for 15 minutes, release the vacuum, discharge the residual silica sol, and take out the wood;
[0025] 3) Wood drying: Stack and weigh the impregnated rubber wood. After air-drying for 5 days, put it in a periodic forced circulation drying kiln for conventional kiln drying. The drying time is 7 days, and the moisture content of the wood is reduced to 13% out of the kiln;
[0026] 4) Wood carbonization: put the dried rubber w...
Embodiment 2
[0028] 1) Selection of silica sol: The specifications of the selected silica sol: pH value is 6.80, SiO 2 The content is 25%, the density is 1.16g / cm 3 , the particle size range is 10-25nm;
[0029] 2) Wood impregnation pretreatment: use vacuum pressure method, put 3.5cm thick rubber wood in the treatment tank, vacuumize to -0.08MPa, keep for 25min, then inject silica sol, after the treatment tank is filled, pressurize to 1.4MPa, keep it for 1.5h, release the pressure, return the silica sol to the liquid storage tank, evacuate it again to -0.09MPa, keep it for 10min, release the vacuum, discharge the residual silica sol, and take out the wood;
[0030] 3) Drying of wood: Stack and weigh the impregnated rubber wood. After 7 days of air drying, they are placed in a periodic forced circulation drying kiln for conventional kiln drying. The drying time is 9 days, and the moisture content of the wood is reduced to 15% out of the kiln;
[0031] 4) Wood carbonization: put the dried...
Embodiment 3
[0033] 1) Selection of silica sol: The specifications of the selected silica sol: pH value is 7.80, SiO 2 The content is 45%, the density is 1.35g / cm 3 , the particle size range is 55-85nm;
[0034] 2) Wood impregnation pretreatment: use vacuum pressure method, put 5.5cm thick rubber wood in the treatment tank, vacuumize to -0.85MPa, keep for 35min, then inject silica sol, after the treatment tank is filled, pressurize to 1.8MPa, keep it for 1.5h, release the pressure, return the silica sol to the storage tank, evacuate it again to -0.09MPa, keep it for 5min, release the vacuum, discharge the residual silica sol, and take out the wood;
[0035] 3) Wood drying: The impregnated rubber wood is stacked and weighed. After 9 days of air drying, it is placed in a periodic forced circulation drying kiln for conventional kiln drying. The drying time is 13 days, and the moisture content of the wood is reduced to 17% out of the kiln;
[0036] 4) Wood carbonization: put the dried rubbe...
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