Composite material based on agricultural wastes as well as preparation method and application of composite material

A technology for agricultural waste and composite materials, which is applied in the field of agricultural waste-based composite materials and their preparation, can solve the problems that hinder the formation of stable entangled networks of macromolecules, the difficulty of cellulose to form entangled structures, the destruction of multi-level structures and the Crystal structure and other problems, to achieve the effect of improving the degree of dissolution that is difficult to control, good interface compatibility, and good mechanical strength

Active Publication Date: 2020-09-08
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the regenerated hydrogel obtained by simply dissolving and regenerating agricultural waste is very fragile, and it is easy to break during the drying process, and it is impossible to obtain a complete material.
The reasons for the poor mechanical properties of the materials obtained from the dissolution and regeneration of agricultural waste are: first, the content of cellulose components in agricultural waste is low, and the degree of polymerization of cell

Method used

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  • Composite material based on agricultural wastes as well as preparation method and application of composite material
  • Composite material based on agricultural wastes as well as preparation method and application of composite material
  • Composite material based on agricultural wastes as well as preparation method and application of composite material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057] Example 1

[0058] The selected agricultural waste material is wheat straw with a cellulose mass fraction of about 56%, and the selected cellulose material is wood pulp with a degree of polymerization of about 1300. Weigh 19.2 g of dried AMIMCl ionic liquid and 0.64 g of dried wheat straw, stir and dissolve at 120° C., after about 120 minutes, a uniform brown solution is formed. 0.16g of dried wood pulp was added to the solution, and the mixture was further stirred and dissolved at 80°C. After about 60 minutes, a uniform brown wheat straw / wood pulp / AMIMCl mixed solution was obtained. Observe with a polarizing microscope. Black, indicating that the wheat straw cellulose and wood pulp are almost completely dissolved. The mass percentage of wheat straw in the wheat straw / wood pulp / AMIMCl mixed solution is 3.2%, and the mass ratio of wood pulp to wheat straw is 1:4. Spread the mixed solution of wheat straw / wood pulp / AMIMCl evenly on the surface of the glass plate, and put it...

Example Embodiment

[0061] Example 2

[0062] The selected agricultural waste material is rice straw with a cellulose mass fraction of about 45%, and the selected cellulose material is wood pulp with a degree of polymerization of about 1300. Weigh 9.2g of dried AMIMCl ionic liquid, weigh 0.64g of dried rice straw and 0.16g of dried wood pulp, stir and dissolve together at 120℃, about 180 minutes later, a uniform brown rice straw / wood pulp is obtained The mixed solution of meal / AMIMCl is black when observed with a polarizing microscope, indicating that the rice straw cellulose and wood pulp are almost completely dissolved. The mass percentage of rice straw in the rice straw / wood pulp / AMIMCl mixed solution is 6.4%, and the mass ratio of wood pulp to rice straw is 1:4. The rice straw / wood pulp / AMIMCl mixed solution was evenly spread on the surface of the glass plate, and the mixture of AMIMCl and water was used as the coagulation bath. In the coagulation bath, the mass ratio of water to AMIMCl was 1:0...

Example Embodiment

[0063] Example 3

[0064] The selected agricultural waste material is corn stalks with a cellulose mass fraction of about 52%, and the selected cellulose raw material is wood pulp with a degree of polymerization of about 1300. Weigh 6.0g of dried BMIMAc ionic liquid and 0.64g of dried corn stalks and stir to dissolve them at 120°C. After about 120 minutes, a uniform brown solution is formed. The field of view is black when observed with a polarizing microscope, indicating that the corn stalk cellulose Almost completely dissolved. Weigh 3.2g of dried BMIMAc ionic liquid and 0.16g of dried wood pulp, stir and dissolve at 80°C. After about 60 minutes, a uniform yellow transparent solution is formed. The field of view is black when observed with a polarizing microscope, indicating that the wood pulp The meal is almost completely dissolved. The above-mentioned corn stover / BMIMAc solution and wood pulp / BMIMAc solution were mixed, and stirred at 80°C until the mixture was evenly mixed...

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Abstract

The invention discloses a composite material based on agricultural wastes as well as a preparation method and application of the composite material. A mixed solution containing agricultural waste, cellulose and a solvent is prepared, then the mixed solution is precipitated and regenerated in a coagulating bath, and the composite material based on the agricultural wastes is obtained. The formability and mechanical strength of the agricultural waste regenerated material are improved by introducing a small amount of cellulose to construct an entanglement network, the agricultural waste/cellulosecomposite material is prepared on the premise of not using chemical treatment, and the method has the characteristics of simple process, low cost and no pollution. Almost all components in the agricultural wastes are retained in the obtained composite material, so that the material shows multifunctionality, such as good mechanical strength, ultraviolet resistance, oxidation resistance, bactericidal activity, high haze and the like, and has application potential in the fields of green and functional packaging materials, environment-friendly adhesive tapes, textiles, biomedicine, thermal insulation and the like.

Description

technical field [0001] The invention belongs to the fields of polymer processing and green chemistry, and in particular relates to a composite material based on agricultural waste and its preparation method and application. Background technique [0002] The main components of agricultural waste include cellulose, hemicellulose and lignin, and also contain a small amount of protein, wax and inorganic ash, etc., which are biomass resources with great value and application potential. Worldwide agricultural waste is approximately 10 10 -10 11 t, is 1.4 times the crop yield. At present, only a part of agricultural waste is converted into low-value-added products such as feed, fertilizer, and paper, and most of the agricultural waste is discarded or burned as waste, which causes serious pollution to the environment and wastes resources. waste. Therefore, realizing the effective and high-value utilization of agricultural waste is of great significance to environmental protectio...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L1/02C08J9/28D01F8/02D01F8/18C08J5/18C08J3/075
CPCC08J3/075C08J5/18C08J9/28C08J2201/0484C08J2201/0502C08J2205/026C08J2301/02C08J2397/02C08L1/02C08L97/02D01F8/02D01F8/18Y02P20/54
Inventor 张军李锦阳张金明张晓程
Owner INST OF CHEM CHINESE ACAD OF SCI
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