Preparation method of bio oil-phenol-methanal copolycondensation resin wood adhesive

A technology of wood adhesive and co-condensation resin, which is applied in the fields of fine chemicals and polymer materials, can solve the problems of high production cost of phenolic resin, poor ecological environmental protection, and high dependence on petrochemical resources, and achieve good waterproof performance and reduce Pyrolysis problems and time, cost reduction effect

Active Publication Date: 2011-02-16
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0005] The purpose of the present invention is to propose a preparation method of bio-oil-phenol-formaldehyde polycondensation resin wood adhesive, under the premise of ensuring the mechanical properties of phenolic resin itself, to solve the high production cost of phenolic resin for wood and the impact on petrochemical resources. The problem of high dependence and poor ecological environmental protection, and make its mechanical strength meet the national standard, provide a new technical solution for the development of green and environmentally friendly biomass-based wood adhesives and the utilization of natural renewable resources

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  • Preparation method of bio oil-phenol-methanal copolycondensation resin wood adhesive

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preparation example Construction

[0018] The preparation method of bio-oil-phenol-formaldehyde polycondensation resin wood adhesive proposed by the present invention comprises the following steps:

[0019] (1) Filter the bio-oil, remove the granular carbon therein, add an organic solvent in the filtered bio-oil, the mass ratio of adding is: bio-oil: organic solvent=(1~2): 1, let stand for 30 minutes Finally, the solution is divided into the first organic phase and the first inorganic phase, separate the first inorganic phase solution, rinse the first organic phase solution with distilled water, and then add hydrogen carbonate with a concentration of 10% to 20% in the first organic phase solution Sodium solution, mixed evenly and allowed to stand for 30 minutes, the solution was divided into the second organic phase and the second inorganic phase, the second inorganic phase was separated, and the organic solvent in the second organic phase was removed by vacuum distillation to obtain refined bio-oil ;

[0020]...

Embodiment 1

[0026] 1. Use a quantitative filter paper with a pore size of 30 to 50 microns to filter out the granular carbon part in the bio-oil, add organic solvent ethyl acetate to the filtered bio-oil, and the mass ratio added is bio-oil: ethyl acetate=1: 1. After standing for 30 minutes, the solution is divided into the first organic phase A phase and the first inorganic phase B phase. Phase A is the part dissolved in the organic solvent, and phase B is the part insoluble in the organic solvent; use a separating funnel to separate For phase B, wash phase A solution repeatedly with distilled water to remove some water-soluble substances, then dissolve phase A in a 10% sodium bicarbonate solution, mix well, and after standing for 30 minutes, the solution is divided into the second organic phase C phase And the second inorganic phase D phase, C phase is the part that does not dissolve in 10% sodium bicarbonate solution, and D phase is the part that dissolves in 10% sodium bicarbonate solu...

Embodiment 2

[0037] 1. Use a quantitative filter paper with a pore size of 30 to 50 microns to filter out the granular carbon part in the bio-oil, add the organic solvent butyl acetate to the filtered bio-oil, and the mass ratio added is bio-oil: butyl acetate=1.5: 1. After standing for 30 minutes, the solution is divided into the first organic phase A phase and the first inorganic phase B phase. Phase A is the part dissolved in the organic solvent, and phase B is the part insoluble in the organic solvent; use a separating funnel to separate For phase B, wash phase A solution repeatedly with distilled water to remove some water-soluble substances, then dissolve phase A in 15% sodium bicarbonate solution, mix well, and after standing for 30 minutes, the solution is divided into the second organic phase C phase And the second inorganic phase D phase, C phase is the part that is insoluble in 15% sodium bicarbonate solution, and D phase is the part that is dissolved in 15% sodium bicarbonate so...

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Abstract

The invention relates to a preparation method of a bio oil-phenol-methanal copolycondensation resin wood adhesive, belonging to the technical field of fine chemistry and high polymer materials, which comprises the following steps of filtering and refining bio oil to prepare the refined bio oil; adding sulfur and sodium hydroxide solution to the refined bio oil; stirring, heating and reacting to prepare the modified bio oil; and adding phenol and a catalyst to the modified bio oil to prepare the adhesive after reacting. In the method of the invention, the bio oil is taken as a substrate to synthesize the adhesive for wood, and the content of the bio oil is 50 to 60% of the total content of the adhesive. The prepared adhesive has the advantages of high mechanical strength, good waterproof performance and aging resistance, and can be used for preparing the products in high accessories of outdoor stage plywood, particle boards, fiberboards, layer base materials and the like. Moreover, thepreparation technology for pyrolyzing the bio oil wood adhesive is simple and fast, and the resins have the advantages of strong adhesion performance and long storage life.

Description

technical field [0001] The invention relates to a preparation method of a bio-oil-phenol-formaldehyde co-condensation resin wood adhesive, which belongs to the technical fields of fine chemicals and polymer materials. Background technique [0002] The timber industry plays an important role in the economy of our country, and the annual consumption of timber in our country reaches 21.5 billion m 3 , about 11.5 billion tons, equivalent to the sum of the annual consumption of steel and plastics in my country. Due to the lack of forest resources, there are few large-diameter trees. To meet the needs of my country's industrial and agricultural production and people's lives, only small-diameter timber can be used. Manufacture of wood-based panels has become the main solution. Therefore, the amount of glue used in the wood industry has increased year by year in recent years. [0003] At present, the glue used in the wood industry is mainly based on "trialdehyde" adhesives. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G57/00C09J161/14C08G8/28
Inventor 常建民许守强苟进胜夏碧华张继宗韩彦雪
Owner BEIJING FORESTRY UNIVERSITY
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