A method for preservative and reinforcement of wood with nanocellulose
A nano-cellulose and wood technology, applied in wood processing equipment, wood impregnation, wood treatment, etc., can solve the problems of low microstructure strength, cumbersome preparation process, poor loss resistance, etc., achieve enhanced mechanical properties, wide application scenarios, The effect of high fixation rate
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Embodiment 1
[0025] Example 1: A method of using nano-cellulose to preserve and reinforce wood is to modify the wood interface through nano-cellulose, use nano-scale inorganic substances to carry out anti-corrosion treatment on the modified wood, and then use the pressure impregnation method to Silica and nano-calcium carbonate have reinforcing inorganic nanoparticles to reinforce the wood cell wall to obtain anti-corrosion reinforced wood with stable anti-corrosion performance and not easy to be damaged by force, including the following steps:
[0026] (1) Soak the wood in a reaction kettle equipped with a nano-cellulose aqueous suspension, and the concentration of the nano-cellulose aqueous suspension is 0.1-0.45%. The types of nanocellulose include cellulose microfibrils, nanocellulose crystals, bacterial nanocellulose and modified nanocellulose, as well as any mixture of the above celluloses. At a room temperature of 25-30° C., vacuum soaking for 30-60 minutes to obtain nanocellulose-m...
Embodiment 2
[0032] Example 2: Take 0.25% concentration of cellulose nanocrystals, 0.2% concentration of Cu 2+ solution, nano calcium carbonate. Soak 12 pieces of poplar wood of 20mm×20mm square in cellulose nanocrystal water suspension, concentration 0.25%, vacuum soak at room temperature for 24h, to obtain cellulose nanocrystal modified wood. Take 0.0500g CuSO4 and 0.1000g citric acid, pour them into a 150ml container, add deionized water to 25.00g, put in a magnetic stirrer, stir until completely dissolved, and obtain a concentration of 0.2% Cu 2+ solution. Modified wood with cellulose nanocrystals, soaked in the obtained 0.2% concentration Cu 2+ solution, stirred for 5min. Put the container into a preheated oil bath at 100 degrees Celsius, add 0.1500 g of sodium hypophosphite, and stir for 2 hours. Take out the wood, wash it with deionized water for 3 times and immerse in water for 12 hours. During this period, change the water frequently to wash the wood, and then dry it at room t...
Embodiment 3
[0034] Embodiment 3: 0.25% concentration nanocellulose, 0.4% concentration Cu 2+ solution, nano-silica.
[0035] Step 1: Soak 12 pieces of poplar wood with a square size of 20mm×20mm in nanocellulose aqueous suspension with a concentration of 0.25%, vacuum soaking at room temperature for 24 hours, and obtain nanocellulose-modified wood.
[0036] Step 2: Take 0.1000g CuSO4 and 0.2000g citric acid, pour them into a 150ml container, add deionized water to 25.00g, put in a magnetic stirrer, stir until completely dissolved, and obtain 0.4% Cu 2+ solution.
[0037] Step 3: modify the wood with nanocellulose in step 1, soak in the Cu in step 2 2+ solution, stirred for 5min. Put the container into a preheated oil bath at 100 degrees Celsius, add 0.3000 g of sodium hypophosphite, and stir for 2 hours. Pull out the wood, wash it with deionized water for 3 times and soak it in water for 12 hours. During this period, change the water frequently to make the wood clean, and then dry it ...
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