Preparation method of wood-based selective near-infrared absorption material
A technology of base selectivity and absorbing materials, applied in wood treatment, wood heating, wood impregnation, etc., can solve the problem that transparent wood does not have near-infrared absorption characteristics, achieve strong near-infrared light absorption ability, good social value, preparation short cycle effect
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specific Embodiment approach 1
[0009] Embodiment 1: This embodiment is a preparation method of a wood-based selective near-infrared absorbing material, which is specifically completed according to the following steps:
[0010] 1. Remove the chromophoric groups in the wood to obtain the delignified wood substrate;
[0011] 2. Add metal tungsten organic chelates and tungsten oxide nanowires into the resin as near-infrared absorbers to obtain a resin mixed with near-infrared endothermic materials, and the tungsten oxide nanowires in the resin mixed with near-infrared endothermic materials The mass fraction of the thread is 0.03% to 1%, and the mass fraction of metal tungsten organic chelate in the resin mixed with near-infrared endothermic material is 3% to 15%;
[0012] 3. Immerse the delignified wood substrate into the resin mixed with near-infrared heat-absorbing materials, then add curing agent and ethanol, and mix well. First, it will be treated by vacuum infiltration-pressurized infiltration cycle for 1h...
specific Embodiment approach 2
[0013] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the specific process of removing the chromophoric group in the wood in step 1 is as follows: ①, first dry the wood veneer at a temperature of 103-105°C for 12h-14h , to obtain the dried wood veneer; ②, immerse the dried wood veneer in the delignification solution, and use glacial acetic acid to adjust the pH of the delignification solution to 4-5, and then treat it in a water bath at a temperature of 75-95°C for 8 hours ~12h, the treated wood is obtained; the delignification solution is a sodium chlorite solution with a mass fraction of 2.5% to 3.5%; ③, using hydrogen peroxide with a mass fraction of 7 to 25% to bleach the treated wood, The bleached wood is obtained; ④, the bleached wood is first rinsed with deionized water for 10s to 30s, and then extracted and dehydrated with a dehydrating agent to obtain a de-lignified wood substrate. Others are the same as the first embodimen...
specific Embodiment approach 3
[0014] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the material of the wood veneer described in step 1. is basswood, and density is 500kg / m 3 ~550kg / m 3 . Others are the same as in the second embodiment.
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