Lignin phenolic foam and preparation method thereof

A technology for phenolic foam and lignin, which is applied in the field of lignin phenolic foam and its preparation to achieve the effects of reducing production costs, reducing risks and reducing environmental pollution

Active Publication Date: 2014-04-30
SHANDONG YUSHIJU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lignin component in corn cob can effectively improve the toughness and strength of phenolic foam. Combining such resources with the preparation of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take the mixture of corn cobs and corn stalks and mash them into NaOH solution with a mass concentration of 4%. 5 rpm, wash with water to remove residual NaOH solution and impurities, the main components of impurities are lipids; then add phenol, the volume of the mixture of corn cobs and corn stalks is 20% of the phenol, and liquefy the corn cobs and corn stalks to obtain biomass phenol. Mix biomass phenol and formaldehyde at a volume ratio of 1:2, add concentrated sulfuric acid to catalyze, fully stir at 80°C for 90 minutes for polycondensation reaction, and then dehydrate under reduced pressure to obtain lignin flow state phenolic resin;

[0028] Get 100 mass parts of lignin flow state phenolic resin, 4 mass parts of Tween-80, 10 mass parts of foaming agent, 15 mass parts of toluenesulfonic acid, described foaming agent is normal pentane: normal hexane by volume ratio 8: 2. Stir the mixed mixture at room temperature 20°C for 60 seconds, and put it in an environment o...

Embodiment 2

[0031] Take corn cobs and corn stalks and mash them, add them to a NaOH solution with a mass concentration of 4% and stir in a frame for 30 minutes at a stirring speed of 10 rpm, wash with water to remove NaOH solution and impurities, then add phenol, the volume of the mixture of corn cobs and corn stalks 20% of phenol, liquefaction of corn cob and corn stover to obtain biophenol. Mix biomass phenol and formaldehyde at a volume ratio of 1:2, add concentrated sulfuric acid to catalyze, fully stir at 80°C for 120 minutes for polycondensation reaction, and then dehydrate to obtain lignin flow state phenolic resin;

[0032] Take 100 parts by mass of lignin flow state phenolic resin, 4 parts by mass of silicone oil, 5 parts by mass of foaming agent, and 30 parts by mass of toluenesulfonic acid. The foaming agent is n-pentane: n-hexane mixed in a volume ratio of 8:2 The mixture was stirred at 30°C for 30 seconds, and foamed at 70°C. 7 Minutes later, the cured product lignin phenoli...

Embodiment 3

[0035] Take the mixture of corn cobs and corn stalks, mash them, add them to the NaOH solution with a mass concentration of 4% and stir for 30 minutes in a frame at a stirring speed of 8 rpm, wash with water to remove the NaOH solution and impurities, then add the mixture of phenol, corn cobs and corn stalks The volume of the phenol is 25%, and the corn cob and corn stalk are liquefied to obtain biomass phenol. Mix lignin biomass phenol and formaldehyde at a volume ratio of 1:2, add hydrochloric acid to catalyze, fully stir at 90°C for 70 minutes for polycondensation reaction, and then dehydrate to obtain lignin flow state phenolic resin;

[0036] Get 100 mass parts of lignin flow state phenolic resin, 6 mass parts of Tween-80, 10 mass parts of foaming agent, 10 mass parts of xylenesulfonic acid, described foaming agent is barium carbonate powder, stir in 36 ℃ for 30 Seconds, placed in a 60°C environment for foaming, 10 Minutes later, the cured product lignin phenolic foam wa...

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Abstract

The invention relates to lignin phenolic foam and a preparation method thereof. The preparation method comprises the following step: liquefying lignin to obtain biomass phenol to obtain lignin flowing phenolic resin under the catalyst effect of formaldehyde. The lignin phenolic foam is prepared from the following components in parts by mass: 100 parts of lignin flowing phenolic resin, 4-8 parts of a surfactant, 10-32 parts of a curing agent and 5-20 parts of a foamer. According to the lignin phenolic foam provided by the invention, dependency of phenolic resin on petrochemical materials is reduced, and the foam is uniformly foamed, has good heat-preserving and fire resisting performances and biodegradability, belongs to an environment-friendly product, and has huge social, economic and biological benefits.

Description

technical field [0001] The invention relates to a polymer material and a preparation method thereof, in particular to a lignin phenolic foam and a preparation method thereof. Background technique [0002] As a building material, phenolic foam has the advantages of heat preservation and moisture resistance, sound insulation and anti-corrosion, non-aging, heat resistance and non-combustibility, etc., and is widely used in the building materials industry. Phenolic foam is obtained by further foaming phenolic resin. At present, phenolic resin is synthesized with phenol and formaldehyde as the main raw materials. As a petrochemical product, phenol is expensive and consumes a lot of energy. With the promotion of phenolic foam, the market demand for phenol is increasing, which is in contradiction with the decreasing of petrochemical resources. [0003] Corn stalks contain more than 30% carbohydrates, and the main components of corn cobs are 35-40% hemicellulose, 32-36% cellulose,...

Claims

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Application Information

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IPC IPC(8): C08L61/14C08G8/28C08J9/14C08J9/08
Inventor 张遵国张家滔
Owner SHANDONG YUSHIJU CHEM CO LTD
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