Lignin-unsaturated carboxylate composite reinforcing agent and application thereof in rubber

A lignin and unsaturated technology, applied in the technical field of superfine powder for reinforcement and the field of rubber composite materials, can solve the problems of large intermolecular force, unfavorable rubber reinforcement, and difficulty in dispersion, etc. The effect of reducing force and improving dispersibility

Active Publication Date: 2019-11-22
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of phenolic hydroxyl groups in the lignin structure, its intermolecular force is large, it is easy to agglomerate into large particles, and it is difficult to disperse, which is not conducive to the reinforcement of rubber

Method used

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  • Lignin-unsaturated carboxylate composite reinforcing agent and application thereof in rubber
  • Lignin-unsaturated carboxylate composite reinforcing agent and application thereof in rubber
  • Lignin-unsaturated carboxylate composite reinforcing agent and application thereof in rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Mix and stir eucalyptus lignin and zinc methacrylate at a mass ratio of 100:5, and inject 0.8Mpa compressed air into the jet mill at the same time, and put the pulverized material into the classification chamber for classification, and the submachine speed is 8000rpm / min, return the classified material with a mesh number <3000 mesh to the jet mill for re-crushing, and discharge the classified mesh mesh ≥3000 mesh material from the discharge port to obtain a lignin-zinc methacrylate composite reinforcing agent;

[0034] (2) Weigh 10g of the composite reinforcing agent obtained in step (1), mix it with 40g of natural rubber, 10g of high wear-resistant carbon black N330, 1g of sulfur, 0.6g of N-cyclohexyl-2-benzothiazole sulfenamide, 2g of oxidation Add zinc and 0.8g stearic acid to the internal mixer in turn, and banbury at 100°C for 20 minutes;

[0035] (3) Place the mixed rubber obtained in step (2) in an open mill and pass it 7 times to lower the sheet, measure it...

Embodiment 2

[0037] (1) Mix and stir eucalyptus lignin and zinc methacrylate at a mass ratio of 100:10, and inject 0.8Mpa compressed air into the jet mill at the same time, and put the pulverized material into the classification chamber for classification, and the submachine speed is 8000rpm / min, return the classified material with a mesh number <3000 mesh to the jet mill for re-crushing, and discharge the classified mesh mesh ≥3000 mesh material from the discharge port to obtain a lignin-zinc methacrylate composite reinforcing agent;

[0038] (2) Weigh 10g of the composite reinforcing agent obtained in step (1), mix it with 40g of natural rubber, 10g of high wear-resistant carbon black N330, 1g of sulfur, 0.6g of N-cyclohexyl-2-benzothiazole sulfenamide, 2g of oxidation Add zinc and 0.8g stearic acid to the internal mixer in turn, and banbury at 100°C for 20 minutes;

[0039] (3) Place the mixed rubber obtained in step (2) in an open mill and pass it 7 times to lower the sheet, measure i...

Embodiment 3

[0041](1) Mix and stir eucalyptus lignin and zinc methacrylate at a mass ratio of 100:20, and inject 0.8Mpa compressed air into the jet mill at the same time, and put the pulverized material into the classification chamber for classification, and the submachine speed is 8000rpm / min, return the classified material with a mesh number <3000 mesh to the jet mill for re-crushing, and discharge the classified mesh mesh ≥3000 mesh material from the discharge port to obtain a lignin-zinc methacrylate composite reinforcing agent;

[0042] (2) Weigh 10g of the composite reinforcing agent obtained in step (1), mix it with 40g of natural rubber, 10g of high wear-resistant carbon black N330, 1g of sulfur, 0.6g of N-cyclohexyl-2-benzothiazole sulfenamide, 2g of oxidation Add zinc and 0.8g stearic acid to the internal mixer in turn, and banbury at 100°C for 20 minutes;

[0043] (3) Place the mixed rubber obtained in step (2) in an open mill and pass it 7 times to lower the sheet, measure it...

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Abstract

The invention discloses a lignin-unsaturated carboxylate composite reinforcing agent and application thereof in rubber. The lignin-unsaturated carboxylate composite reinforcing agent is obtained by adding lignin and unsaturated carboxylate into grinding equipment and adjusting the process until materials meet the required particle size. Compared with the prior art, according to the invention, thehigh-performance rubber reinforcing agent is prepared by adopting a reactive grinding mode of lignin and unsaturated carboxylate; metal ions in the unsaturated carboxylate and polar functional groupsin a lignin structure are used for generating a chelating effect, thereby facilitating dispersion of the lignin; meanwhile, the unsaturated carboxylate can be subjected to self-polymerization and grafting reaction with a rubber matrix in the vulcanization process to form ionic crosslinking chemical bonds, so that various mechanical properties of the vulcanized rubber are remarkably improved, and the reinforcing agent has a wide market application prospect.

Description

technical field [0001] The invention belongs to the technical field of superfine powder for reinforcement and the technical field of rubber composite materials, and specifically relates to a lignin-unsaturated carboxylate composite reinforcing agent and its application in rubber. Background technique [0002] Lignin is the second largest biomass resource in the world after cellulose, but it has long been used as waste in the biorefinery industry and paper industry, which not only has a low recycling rate, but also causes serious environmental pollution. Lignin has a highly cross-linked molecular structure, excellent aging resistance and thermal stability, and is expected to be used as a high-performance reinforcing agent in the rubber field, but this has strict requirements on its particle size. Because the lignin structure contains a large number of phenolic hydroxyl groups, the intermolecular force is large, and it is easy to agglomerate into large particles, and it is dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L51/04C08L33/02C08L97/00C08K3/04C08K5/47C08K3/06C08K5/09C08K13/02
CPCC08L7/00C08L2205/035C08L51/04C08L33/02C08L97/005C08K3/04C08K5/47C08K3/06C08K5/09C08K13/02
Inventor 应汉杰朱时祥李明朱晨杰庄伟唐成伦沈涛谭卓涛柳东陈勇牛欢青杨朋朋吴菁岚高南欧阳平凯
Owner NANJING UNIV OF TECH
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