Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF11 Cites 3 Cited by
  • 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 cellulose is low, so it is difficult for cellulose to form an entangled structure in the solution; second , the existence of a large amount of impurities such as lignin, hemicellulose, and inorganic salts hinders the formation of stable entangled networks of polymers in agricultural wastes; third, the dissolution process destroys the original multi-level structure and crystalline structure in agricultural wastes , these structures cannot be restored during regeneration

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Embodiment 1

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

Embodiment 2

[0062] The raw material of agricultural waste is rice straw, and its cellulose mass fraction is about 45%, and the selected cellulose raw material is wood pulp, and its degree of polymerization is about 1300. Weigh 9.2g of dry AMIMCl ionic liquid, weigh 0.64g of dry rice straw and 0.16g of dry wood pulp, stir and dissolve together at 120°C, and after about 180 minutes, uniform brown rice straw / wood pulp is obtained Meal / AMIMCl mixed solution was all black in the field of view observed with a polarizing microscope, indicating that the rice straw cellulose and wood pulp were basically completely dissolved. The mass percentage of rice straw in the rice straw / wood pulp / AMIMCl mixed solution was 6.4%, and the mass ratio of wood pulp and rice straw was 1:4. The mixed solution of rice straw / wood pulp / AMIMCl 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 AMIM...

Embodiment 3

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com