Preparation method of biomass modified phenolic foamed plastics
A technology of phenolic foam plastics and biomass, applied in the field of preparation of biomass lignin furfural modified phenolic foam plastic insulation materials, can solve problems such as pollution
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Embodiment 1
[0024] In 100 mass parts of molten phenol, add 5 mass parts of alkali catalyst aqueous solution and 30 mass parts of lignin, described alkali catalyst aqueous solution is alkaline earth metal hydroxide aqueous solution, the mass percent concentration of described alkali catalyst aqueous solution is 2% , react at reflux temperature of 100°C for 2h, then add dropwise the mixed solution of formaldehyde and furfural and the amount of the mixed solution is 72 parts by mass, react at reflux temperature of 100°C for 2h, the mass ratio of formaldehyde and furfural in the mixed solution 60:40, when the consumption of formaldehyde and furfural reaches 90%, neutralize with acid, adjust the pH of the system to 6.5, and obtain a resole phenolic resin with a solid content of 78%, and a viscosity of 1.0 Pa·S at room temperature;
[0025] The resulting resole phenolic resin and foaming catalyst, surfactant and blowing agent are stirred and mixed uniformly, and the mass ratio of the resole phen...
Embodiment 2
[0027] In 100 mass parts of molten phenol, add 6 mass parts of alkali catalyst aqueous solution and 30 mass parts of lignin, described alkali catalyst aqueous solution is alkaline earth metal hydroxide aqueous solution, and the mass percent concentration of described alkali catalyst aqueous solution is 3% , reacted at reflux temperature of 90°C for 1h, then added dropwise the mixed solution of formaldehyde and furfural and the amount of the mixed solution was 70 parts by mass, reacted for 2h at reflux temperature of 90°C, the mass ratio of formaldehyde and furfural in the mixed solution 50:40, when the consumption of formaldehyde and furfural reaches 90%, neutralize with acid, adjust the pH of the system to 6.8, and obtain a resole phenolic resin with a solid content of 78%. At room temperature, the viscosity is 8.4Pa·S ;
[0028] Stir and mix the obtained resole phenolic resin and foaming catalyst, surfactant and foaming agent evenly, and the mass ratio of the resole phenolic...
Embodiment 3
[0030] In 100 mass parts of molten phenol, add 10 mass parts of alkali catalyst aqueous solution and 40 mass parts of lignin, described alkali catalyst aqueous solution is alkaline earth metal hydroxide aqueous solution, and the mass percentage concentration of described alkali catalyst aqueous solution is 5% , reacted at 100°C reflux temperature for 1.5h, then added dropwise the mixed solution of formaldehyde and furfural and the amount of the mixed solution was 60 parts by mass, reacted at 100°C reflux temperature for 2h, the mass of formaldehyde and furfural in the mixed solution The ratio is 50:50. When the consumption of formaldehyde and furfural reaches 90%, neutralize with acid, adjust the pH of the system to 7.0, and obtain a resole phenolic resin with a solid content of 80%. At room temperature, the viscosity is 6.5Pa. S;
[0031] Stir and mix the obtained resole phenolic resin and foaming catalyst, surfactant and foaming agent evenly, and the mass ratio of the resole...
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