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A method for preparing waste hair composite materials using ionic liquids

A technology of ionic liquids and reinforced composite materials, applied in the production of bulk chemicals, etc., can solve the problems of interfacial compatibility, hair mechanical property damage, etc., and achieve the effects of avoiding damage, high reaction efficiency, and low volatility

Active Publication Date: 2019-06-07
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can not only solve the interfacial compatibility problem when simply mixing, but also avoid the damage to the mechanical properties of hair caused by the dissolution of ionic liquids during homogeneous modification.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Dithiothreitol is added to the 1-allyl-3-methylimidazolium chloride salt ionic liquid according to the weight percentage (wt%) of 1%, and the temperature is raised to 80° C. after mixing;

[0059] (2) adding 1 wt% of the ionic liquid to the above-mentioned mixed solvent system, washed and degreased dry wool, and swelling for 10 minutes;

[0060] (3) After the swelling is completed, add potassium persulfate and methyl acrylate monomer to the above-mentioned mixed solvent system to carry out graft modification. The reaction time is 20 minutes, wherein the ratio of potassium persulfate to hair is 0.01%, methyl acrylate The ratio of ester monomer to wool is 10wt%;

[0061] (4) After the reaction is completed, add 2 times the volume of ethanol to the above mixed solvent system, mix evenly, filter, collect the precipitate, and dry at 50°C;

[0062] (5) Mix the above-mentioned precipitate and polymethyl methacrylate particles twice the weight of the precipitate evenly and...

Embodiment 2

[0065] (1) Cysteine ​​is added to 1-butyl-3-methylimidazolium chloride salt ionic liquid according to the weight percentage (wt%) of 5%, and the temperature is raised to 120° C. after mixing;

[0066] (2) adding 10wt% of the ionic liquid to the above mixed solvent system, washing and degreasing dry wool, and swelling for 20 minutes;

[0067] (3) After the swelling is completed, add potassium persulfate and ethyl acrylate monomer to the above-mentioned mixed solvent system to carry out graft modification, and the reaction time is 120 minutes. The ratio of ester monomer to wool is 300wt%;

[0068] (4) After the reaction is completed, add 2 times the volume of ethanol to the above mixed solvent system, mix evenly, filter, collect the precipitate, and dry at 130 ° C;

[0069] (5) Mix the above-mentioned precipitate and polymethyl methacrylate particles twice its weight evenly and place it in a hot-pressing mold, and use a hot-pressing machine for hot-pressing. The hot-pressing te...

Embodiment 3

[0072] (1) adding choline thioglycolate to 1-ethyl-3-methylimidazolium chloride salt ionic liquid according to the weight percentage (wt%) of 1%, and heating up to 150°C after mixing evenly;

[0073] (2) adding 30wt% of the ionic liquid to the above mixed solvent system, washing and degreasing dry wool, and swelling for 30 minutes;

[0074] (3) After swelling, add potassium persulfate and isobutyl acrylate monomer to the above-mentioned mixed solvent system to carry out graft modification, the reaction time is 40 minutes, wherein the ratio of potassium persulfate to hair is 0.5wt%, The ratio of isobutyl acrylate monomer to wool is 100wt%;

[0075] (4) After the reaction is completed, add 2 times the volume of ethanol to the above mixed solvent system, mix evenly, filter, collect the precipitate, and dry it at 50-130°C;

[0076] (5) Mix the above-mentioned precipitate and polymethyl methacrylate particles twice its weight evenly and place it in a hot-pressing mold, and use a h...

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Abstract

Belonging to the field of comprehensive utilization of biomass resources, the invention discloses a method for preparation of a waste hair composite material with ionic liquid. The method includes: using a mixed system composed of ionic liquid and a reducing agent to swell waste hair so as to destroy the scale layer, and reducing a disulfide bond to obtain swollen hair fiber containing a lot of mercapto groups, then adding an initiator and an acrylic monomer into the system respectively to conduct swelling graft modification on the hair, carry out reaction for certain period of time, then adding ethanol that is 2 times the volume of the system and performing filtering to obtain acrylate modified hair, performing drying at certain temperature, and then conducting hot pressing, thus obtaining the thermoplastic reinforced composite material. The method provided by the invention adopts ionic liquid as the solvent and reaction medium, and employs swelling graft modification to prepare the thermoplastic reinforced composite material, not only improves the reaction efficiency, but also protects the natural mechanical properties of hair fiber.

Description

technical field [0001] The invention relates to a method for preparing waste hair composite materials by utilizing ionic liquid, and belongs to the field of comprehensive utilization of biomass resources. Background technique [0002] Animal hair has lower density, higher elastic modulus, and higher tensile strength than plant fibers, making it more suitable for use as a reinforcing component of composite materials. my country's animal husbandry and poultry breeding industries produce millions of tons of waste hair every year. These waste hairs are not only difficult to process and utilize, but also cannot be degraded quickly after being discarded, which also puts a certain pressure on the environment. Therefore, if these waste hairs are used as reinforcements of thermoplastic composite materials, it will help to improve the comprehensive utilization of resources. [0003] However, in the preparation of fiber thermoplastic reinforced composites, there is a problem of poor i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F289/00C08F220/14C08F220/18C08H1/06C08L33/12C08L51/00
CPCC08F289/00C08H1/06C08L33/12C08L51/00C08F220/18Y02P20/54
Inventor 袁久刚张庆娟吴敬王平王强范雪荣王莉清
Owner JIANGNAN UNIV
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