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Molding compound modified by organosolv lignin or derivative thereof and preparation method thereof

A lignin, solvent-based technology, applied in the field of solvent-based lignin or its derivative modified molding compound and its preparation, can solve the problems of energy consumption, heating and the like, achieve reduced consumption, low manufacturing cost, and be beneficial to environmental protection Effect

Inactive Publication Date: 2012-04-11
程贤甦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of phenolic resin requires phenol, aldehyde and other products obtained through coal chemical or petrochemical processes. The synthesis process requires heating, energy consumption, and the treatment of phenolic sewage to solve environmental problems.

Method used

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  • Molding compound modified by organosolv lignin or derivative thereof and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 : Preparation of Lignin Modified Molding Compounds by Enzymolysis of Lignin

[0029]Dissolve 10g of urea in 20g of formamide, stir and dissolve to obtain a mixed plasticizer, mix 50g of enzymatic lignin and the above mixed plasticizer in a container with a stirrer, and stir to form a plasticized mixture. Mix the lignin plasticized mixture with 30g wood flour and 15g hexamethylenetetramine curing agent on the mixer for 40min, then add 5g furfural plasticizer, 1g stearic acid, 1g zinc stearate lubricant and 3g graphite Powder toughener, and mix for 30min. The above mixture was compression-molded, pressurized at 25 MPa, and molded at a temperature of 160 °C to obtain a lignin-modified molding compound.

Embodiment 2

[0030] Example 2 : Preparation of Lignin Modified Molding Compounds with High Boiling Alcohol Lignin

[0031] Dissolve 5g urea in a mixed solution of 20g formamide and 4g glycerin, stir and dissolve to obtain a mixed plasticizer, mix 50g high boiling alcohol lignin with the above mixed plasticizer in a container with a stirrer, and stir to form plasticizing mixture. Mix the lignin plasticized mixture with 30g wood powder, 10g hexamethylenetetramine and 8g diethylenetriamine curing agent on the mixer for 40min, then add 3g furfural and 2g xylene mixed plasticizer, 1g stearin Acid, 1g of zinc stearate lubricant and 1g of graphene toughening agent were mixed for another 30min. Injection molding at a temperature of 160-175 °C by a bakelite injection molding machine to obtain a lignin-modified molding compound.

Embodiment 3

[0032] Example 3: Preparation of Lignin-Modified Molding Compounds by Enzymolysis of Lignin-Modified Epoxy Resin

[0033] Measure 125ml of epichlorohydrin, add it into a clean 1000ml three-neck flask (in the container), weigh 30g of enzymatic lignin, pour it into the flask container, heat up to 50°C, stir for 30min, let the lignin and epoxy chloride Fully dissolve propane and mix, add 8ml of 30% NaOH solution by weight within 20 minutes, raise the temperature to 55-60°C, stir and reflux for 1 hour, raise the temperature to 70°C, add 20ml of 30% NaOH solution within 20 minutes, and then Stir and reflux for 1 hour, distill off excess epichlorohydrin under reduced pressure to obtain a brown solid that is insoluble in water and has certain elasticity. After washing with water and drying, 83.5 g of brittle brown solid enzymolysis lignin epoxy resin is obtained.

[0034] 5g of glycerin, 25g of formamide plasticizer and 50g of enzymatic lignin modified epoxy resin were mixed in a c...

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Abstract

The invention provides a molding compound modified by organosolv lignin or a derivative thereof and a preparation method thereof. The organosolv lignin or the derivative thereof, a plasticizer, a filling agent, a curing agent, a curing accelerator, a plasticizing agent, a toughening agent and a lubricating agent are blended, and the molding compound modified by the organosolv lignin or the derivative thereof is prepared by a hot-press curing process or an injection molding process. The organosolv lignin or the derivative thereof can replace phenolic resin partially and even completely and the lignin modified molding compound of which the performance is similar to that of a phenolic molding compound is prepared; petroleum chemicals such as phenols, aldehydes and the like are used seldom or are not used, the consumption of petroleum resources and the production cost of the molding compound are reduced and particularly when the phenolic aldehyde is replaced by the lignin or the lignin derivative completely, the phenolic resin is not needed to be synthesized in advance, water and energy are saved, the pollution of phenol-containing sewage is reduced, and significant social benefits are achieved; and a processing technology is simple, easy to perform and good in effect.

Description

technical field [0001] The invention relates to a solvent-type lignin or its derivative modified molding compound and a preparation method thereof, belonging to the field of material preparation. Background technique [0002] Materials are the basis for the existence and development of human society, and the continuous emergence and application of new materials is one of the important symbols of the progress of human civilization. With the progress of society, the development of economy and the improvement of living standards, people pay more and more attention to the earth's resources, environment and ecological balance. Phenolic resin is the first kind of synthetic resin successfully studied by human beings, but due to its brittleness and low strength, it has not been widely used for a long period of time. When it was found that phenolic plastics made by filling a large amount of wood flour into phenolic resins had high mechanical properties, electrical insulation propert...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L51/00C08L61/14C08K13/02C08K5/1535C08K5/09C08K5/098C08K3/04C08K5/01C08K3/36
Inventor 程贤甦
Owner 程贤甦
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