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Protein-based adhesive prepared from raw material of waste slag from leather making, and preparation method thereof

An adhesive and protein-based technology, applied in the field of protein-based adhesives and their preparation, can solve problems such as poor bonding strength and water resistance, and achieve the effects of reducing production costs and broad application prospects.

Active Publication Date: 2012-02-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] If only protein is used as a raw material to synthesize adhesive, its bonding strength and water resistance are poor, and it must be modified by appropriate methods to overcome the above shortcomings

Method used

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  • Protein-based adhesive prepared from raw material of waste slag from leather making, and preparation method thereof
  • Protein-based adhesive prepared from raw material of waste slag from leather making, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of the protein-based adhesive using tanning waste skin dregs as raw material comprises the following steps:

[0032] (1) Wash and cut 100g of tanning waste leather into pieces with a length and width of 1-2cm, add 300g of tap water, and hydrolyze at a temperature of 95°C for 24h, filter after the reaction, and remove the residue to obtain a hydrolyzate of 174.6g, measured The solid content of the hydrolyzate is 45.6%, and the total solid content is 79.6g;

[0033] (2) Add 0.16 g of trypsin to the above hydrolyzate, and enzymolyze it at 20°C for 8 hours;

[0034] (3) Add 177g of tap water, emulsifier alkylphenol polyoxyethylene (10) ether and sodium dodecylbenzenesulfonate (both mass ratio 2: 1) 0.40g to the above-mentioned enzymolysis solution, and Stir and pre-emulsify at a temperature of 15°C for 1.5 hours in a reactor with a thermometer, a thermometer and a reflux condenser;

[0035] (4) Add 80 g of monomer methyl methacrylate and butyl acryl...

Embodiment 2

[0039] The preparation method of the protein-based adhesive using tanning waste skin dregs as raw material comprises the following steps:

[0040] (1) Wash 100g of tanning waste leather, cut it into pieces of 1-2cm in length and width, add 300g of tap water, and hydrolyze it at a temperature of 85°C for 72h. After the reaction is completed, filter it and remove the residue. The solid content of the hydrolyzate is 54.5%, and the total solid content is 89.7g;

[0041] (2) Add 0.9 g of pepsin to the above hydrolyzate, and enzymolyze it at 60°C for 2 hours;

[0042] (3) Add 144g of tap water, emulsifier nonylphenol polyoxyethylene (10) ether and sodium lauryl sulfate (the ratio of the two mass is 2:1) 1.00g to the above-mentioned enzymolysis solution, and stir it Stir and pre-emulsify at a temperature of 30°C for 0.2h in a reactor with a thermometer, a thermometer and a reflux condenser;

[0043] (4) Add 50 g of monomer methyl methacrylate and ethyl acrylate (the mass ratio of t...

Embodiment 3

[0047] The preparation method of the protein-based adhesive using tanning waste skin dregs as raw material comprises the following steps:

[0048] (1) Wash 100g of tanning waste hide, cut into pieces of 1-2cm in length and width, add 300g of tap water, hydrolyze at 90°C for 48h, filter after the reaction, remove the residue, and obtain a hydrolyzate of 166.8g, measured The solid content of the hydrolyzate is 50.0%, and the total solid content is 83.4g;

[0049] (2) Add 0.42 g of papain to the above hydrolyzate, and enzymolyze it at 35°C for 4 hours;

[0050] (3) Add 172g of tap water and 0.60g of emulsifier sodium lauryl sulfate to the above enzymolysis solution, and stir and pre-emulsify at a temperature of 25°C for 0.5h in a reaction kettle with a stirrer, a thermometer and a reflux condenser;

[0051] (4) Add 60 g of monomeric ethyl acrylate and 0.60 g of initiator potassium permanganate to the above-mentioned pre-emulsion, and stir and react at a temperature of 80°C for 6...

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Abstract

The invention discloses a protein-based adhesive prepared from a raw material of waste slag from leather making, and a preparation method thereof. The preparation method of the protein-based adhesive prepared from a raw material of waste slag from leather making comprises the following steps that 1, 100 parts by weight of waste slag from leather making is cleaned up and then is cut into fragments having length and width of 1 to 2 centimeters; 2, 300 parts by weight of tap water is added into the fragments and undergoes hydrolysis with the fragments at a temperature of 85 to 95 DEG C for 24 to 27 hours; 3, after the hydrolysis is finished, hydrolysis products are filtered; residues are removed; and hydrolysate is obtained, wherein solid content of the hydrolysate is controlled in a range of 45 to 55%; 4, 0.15 to 1.0 part by weight of an enzyme is added into the hydrolysate and undergoes enzymolysis at a temperature of 20 to 60 DEG C for 2 to 8 hours; 5, 100 to 200 parts by weigh of tap water and 0.4 to 3.0 parts be weight of at least one emulsifier into the enzymatic hydrolysate and are subjected to pre-emulsification with stirring in a reactor with a stirrer, a thermometer and a backflow condenser at a temperature of 15 to 30 DEG C for 0.2 to 1.5 hours; 6, 50 to 90 parts by weight of at least one monomer and 0.5 to 2.5 parts by weight of an initiator into the pre-emulsion obtained by the step 5 and undergo a reaction with stirring at a temperature of 70 to 95 DEG C for 2 to 6 hours to produce grafted emulsion; and 7, 2 to 13 parts by weight of at least one cross-linking agent into the grafted emulsion and the mixture is stirred uniformly at a room temperature to produce the protein-based adhesive.

Description

technical field [0001] The invention relates to a protein-based adhesive using tanning waste skin dregs as a raw material and a preparation method thereof, belonging to the technical field of adhesives. technical background [0002] Adhesive, also known as adhesive, is a connection medium that can tightly combine the same substance or different substances into a whole through the surface, can transmit reaction force, and can meet certain physical and chemical performance requirements. [0003] Although synthetic adhesives have significant advantages in performance, as people pay more attention to the quality of their own living environment, the toxic effects of traditional synthetic adhesives during production and use and the environmental problems they may cause can no longer be ignored. Therefore, there are more and more scholars devoted to the research of environmentally friendly adhesives. Because protein has biocompatibility and degradability unmatched by other synthet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/00C08F289/00
Inventor 李国英覃伟杨维刘文涛
Owner SICHUAN UNIV