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Method for preparing wood ceramics from epoxy resin and industrial alkali lignin

A technology for industrial alkali lignin and epoxy resin, which is applied in the field of biomass material preparation, can solve problems such as insufficient utilization of industrial lignin, and achieve the effects of good development prospects, simple process and low cost.

Inactive Publication Date: 2018-04-13
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-value development and utilization of lignin is in the ascendant, but due to the rapid development of industry, the supply of lignin by-products produced by pulp and paper enterprises exceeds demand, and most industrial lignin has not been fully utilized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Weigh 60-80 parts of E-44 epoxy resin, heat in a water bath for later use.

[0024] (2) Weigh 15-30 parts of industrial alkali lignin, 6-8 parts of curing agent, add 50-70 parts of absolute ethanol, and carry out magnetic stirring under the condition of heating in a water bath to obtain brown solution A.

[0025] (3) Slowly inject the epoxy resin into the brown solution A while it is hot to obtain the brown viscous mixture B, continue to heat and magnetically stir in a water bath for a period of time under sealed conditions, stop stirring after mixing evenly, and only heat through a water bath, and anhydrous Ethanol was removed as much as possible.

[0026] (4) Place the brown viscous mixture B in an electric vacuum oven, and degas it in vacuum under heating.

[0027] (5) Pour the degassed brown viscous mixture into a metal mold while it is still hot, and let it stand for 12-18 hours.

[0028] (6) Heat the mold to 180-200° C., keep it warm for 60-90 minutes, and o...

Embodiment 2

[0036] (1) Weigh 60-80 parts of E-44 epoxy resin, heat in a water bath for later use.

[0037] (2) Weigh 15-30 parts of industrial alkali lignin, 6-8 parts of curing agent, add 50-70 parts of absolute ethanol, and carry out magnetic stirring under the condition of heating in a water bath to obtain brown solution A.

[0038] (3) Slowly inject the epoxy resin into the brown solution A while it is hot to obtain the brown viscous mixture B, continue to heat and magnetically stir in a water bath for a period of time under sealed conditions, stop stirring after mixing evenly, and only heat through a water bath, and anhydrous Ethanol was removed as much as possible.

[0039] (4) Place the brown viscous mixture B in an electric vacuum oven, and degas it in vacuum under heating.

[0040] (5) Pour the degassed brown viscous mixture into a metal mold while it is still hot, and let it stand for 12-18 hours.

[0041] (6) Heat the mold to 180-200° C., keep it warm for 60-90 minutes, and o...

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PUM

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Abstract

The invention belongs to the technical field of biomass material preparation and provides a method for preparing wood ceramics from epoxy resin and industrial alkali lignin. Absolute ethyl alcohol serves as a diluent and a dispersing agent to completely disperse industrial alkali lignin and a high-temperature latent curing agent into an epoxy resin system so as to obtain the wood ceramics throughhigh-temperature curing and calcining. By adoption of the low-cost industrial alkali lignin as a raw material, the problem of high-value application of lignin can be solved while epoxy resin curing ispromoted, curing agent consumption is reduced, and accordingly production cost is reduced. By adoption of the high-temperature latent curing agent, a long normal-temperature applicable life of the resin system is realized, adaptability to high stirring temperature is realized, and process performances are further improved.

Description

technical field [0001] The invention relates to a method for preparing wood ceramics by using epoxy resin and industrial alkali lignin, and belongs to the technical field of biomass material preparation. Background technique [0002] Wood ceramics is a new type of carbon-carbon composite material proposed by Japanese researchers in the 1990s. By sintering wood impregnated with thermosetting resin at high temperature, products with ceramic-like properties can be obtained. After nearly two decades of exploration, the research on wood-ceramic materials has made great progress, and branches such as silicon carbide wood-ceramics and metal wood-ceramics have been expanded. As a new biomass-based material, wood-based ceramics exhibit unique properties in terms of self-lubrication and electromagnetic shielding, which has attracted extensive attention from researchers at home and abroad. As a substitute for some ceramic materials, wood-based ceramics have good application prospects ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/524C04B35/622
CPCC04B35/524C04B35/622C04B2235/48C04B2235/6022C04B2235/606C04B2235/656C04B2235/6562C04B2235/6567C04B2235/658
Inventor 王明杰陈瑶高建民刘付
Owner BEIJING FORESTRY UNIVERSITY
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