A kind of preparation method of highly dispersed modified lignin and application thereof

A lignin, high-dispersion technology, applied in the field of organic chemical industry, can solve the problems of limited application fields, difficult dispersion, poor compatibility of non-polar rubber, etc., to achieve improved dispersion effect, small surface polarity and good compatibility Effect

Active Publication Date: 2022-04-15
江西宝弘纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The complex polar groups on the surface of lignin fine particles, on the one hand, make them form hydrogen bonds and adsorb together, making it difficult to disperse; It is difficult to effectively disperse in non-polar rubber by traditional mixing methods, which limits its application field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) First take 100 parts of papermaking pulping black liquor, add it into the reactor, stir and heat up to 85°C, add 30 parts of alkoxyl donor, stir and react for 1.5h, wherein the weight ratio of alkoxyl donor is formaldehyde :PEG400=10:5;

[0025] (2) Add 5 parts of stearic acid to the reaction system of step (1), raise the temperature to 100°C, stir and react for 1.5h, and use a condensing reflux device for cooling and reflux during this process;

[0026] (3) The liquid product after the reaction enters the spray dryer with an appropriate flow rate, and sprays and dries. The inlet temperature of the spray tower is 150° C., and the outlet temperature is 100° C. to obtain a powdery material;

[0027] (4) Put the dried powdery material into a high-speed mixer, and stir for 2 hours at 105°C and 1300rpm;

[0028] (5) Cool down to 40° C., stop stirring, and discharge, and the obtained powder is the modified lignin.

[0029] (6) Take 70 parts of modified lignin, weigh 100...

Embodiment 2

[0031] (1) First take 100 parts of papermaking pulping black liquor, add it into the reactor, stir and heat up to 90°C, add 15 parts of alkoxyl donor, stir and react for 1.5h, wherein the weight ratio of alkoxyl donor is formaldehyde :PEG400=10:2;

[0032] (2) Add 10 parts of arachidic acid to the reaction system in step (1), raise the temperature to 105°C, stir and react for 1.0h, and use a condensing reflux device for cooling and reflux during this process;

[0033] (3) The liquid product after the reaction enters the spray dryer with an appropriate flow rate, and sprays and dries. The inlet temperature of the spray tower is 160° C., and the outlet temperature is 110° C. to obtain a powdery material;

[0034] (4) Put the dried powdery material into a high-speed mixer, and stir for 1 hour at 100°C and 1000rpm;

[0035] (5) Cool down to 40° C., stop stirring, and discharge, and the obtained powder is the modified lignin.

[0036] (6) Take 60 parts of modified lignin, weigh 1...

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Abstract

The invention relates to the technical field of organic chemical industry, in particular to the preparation of highly dispersed modified lignin for functional modification of rubber materials, and also to its application. The lignin used is the black liquor of papermaking pulping, no pretreatment is required, the processing links are reduced, and the energy consumption is reduced. The black liquor is modified by methylolation by adding alkoxyl donors, reducing the polarity of phenolic hydroxyl groups, and then adding long chain Fatty acids can coat and isolate lignin through polar attraction, reduce the mutual adhesion between lignin particles, and improve the dispersion performance of modified lignin products. After spray drying, stir and heat to make some carboxylic acid groups and hydroxyl groups The esterification of the methyl group further reduces the surface polarity of the lignin.

Description

technical field [0001] The invention relates to the technical field of organic chemical industry, in particular to the preparation of a highly dispersed modified lignin for functional modification of rubber materials, and also to the application of the modified lignin. Background technique [0002] Lignin is a renewable resource second only to cellulose on the earth. It is estimated that the total global output can reach 50 billion tons per year. In the production process, it is often discharged into the environment as waste, causing environmental pollution. If it can be used to replace fossil materials, it can not only improve the ecological environment, but also delay the crisis caused by the increasing shortage of fossil resources. [0003] As a natural polymer, lignin has a complex molecular structure and active groups such as aromatic groups, phenolic hydroxyl groups, alcoholic hydroxyl groups, and double bonds. At the same time, it has a large specific surface area, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08H7/00C08L9/06C08L97/00C08K13/02C08K5/09C08K3/22C08K5/3437
CPCC08H6/00C08L9/06C08K2003/2296C08L97/005C08K13/02C08K5/09C08K3/22C08K5/3437
Inventor 侯晓旭徐前进
Owner 江西宝弘纳米科技有限公司
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