Preparation method for multi-function cellulose board
A cellulose board, multi-functional technology, applied in the direction of coating, etc., can solve the problems of pure wood floor moisture resistance, poor waterproof ability, affecting the service life of wood floor, expansion, loose deformation, etc., easy to control the process conditions, and reduce moisture absorption performance , The effect of improving waterproof performance
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preparation example Construction
[0025] The present invention adopts the same batch of fiber raw materials, and through extensive research, the preferred preparation method obtained by the present invention comprises the following steps:
[0026] S1. Crush the fiber raw material to 30-40 mesh, dry at 100-110°C for 1-1.5h, add the modified nano-zinc oxide solution, pressurize and vacuumize, and repeat it several times to obtain the pretreated fiber raw material; The preparation process of the modified nano-zinc oxide solution includes: adding ammonia water dropwise to the zinc nitrate solution to make the pH value of the solution system ≥ 9, then using a funnel to obtain the precipitate, and washing the precipitate with deionized water for many times, and pouring the precipitate into the precipitate Add nitric acid solution with a concentration of 0.95mol / L and stir until the pH of the system is between 3.5-4.1, add citric acid and react at a constant temperature of 75-80°C for 1-4h, then filter and wash until ...
Embodiment 1
[0032] In step S1, the fiber raw material is dried so that the moisture content is lower than 6%; the preparation of the modified nano-zinc oxide solution is carried out at a constant temperature for 2 hours; the pressurized pressure is 0.8-1Mpa, and the relative vacuum degree of the vacuum is -0.06 MPa, pressurization and vacuuming were repeated 5 times.
[0033] The mixed solution added in step S2 consists of: 100 parts of methyl silicone oil, 20 parts of methyl alkoxy silicone oil, 9 parts of hydrogen-containing silicone oil, 3 parts of silane coupling agent, 7 parts of nano silicon dioxide, 0.2 parts of emulsifier, 90 parts of water; in step S2, vacuumize first, introduce the mixed solution and stir evenly, then pressurize and homogenize, heat up to 75-85°C and mix for 40 minutes.
[0034] In step S3, the adhesive is a modified nano-urea-formaldehyde resin, and the formaldehyde and urea are mixed at a molar weight ratio of 5:3; pre-pressing for 2.5 hours and hot-pressing f...
Embodiment 2
[0036]The difference between this example and Example 1 is that the mixed solution added in step S2 consists of: 100 parts of methyl silicone oil, 17 parts of methyl alkoxy silicone oil, 10 parts of hydrogen-containing silicone oil, 4 parts of silane coupling agent, nano 8 parts of silicon dioxide, 1 part of emulsifier, and 70 parts of water; Step S2: vacuumize first, introduce the mixed solution and stir evenly, then pressurize and homogenize, heat to 75-85°C and mix for 40 minutes.
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