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Preparation method of Vitrimer material based on carboxyl-containing polysaccharide and dynamic ester bond

A carboxyl polysaccharide and ester bond technology, applied in the field of Vitrimer material preparation, can solve environmental pollution, resource waste and other problems, and achieve high economic efficiency, reduced usage, and good biocompatibility

Inactive Publication Date: 2020-09-25
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of the prior art, the present invention proposes a method for preparing Vitrimer materials based on carboxyl-containing polysaccharides and dynamic ester bonds. Carboxylated polysaccharides, which solve a series of environmental pollution problems and resource waste problems caused by fossil-based thermosetting materials

Method used

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  • Preparation method of Vitrimer material based on carboxyl-containing polysaccharide and dynamic ester bond
  • Preparation method of Vitrimer material based on carboxyl-containing polysaccharide and dynamic ester bond
  • Preparation method of Vitrimer material based on carboxyl-containing polysaccharide and dynamic ester bond

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Dissolve 0.500g of carboxymethylcellulose (CMC) (DS=1.2) and 0.600g of glycerol in 5mL of distilled water while stirring at 60°C, and add bisphenol A diglycidyl ether to it after the solution is clear and transparent (DGEBA) 0.390g and continue to stir rapidly at 60°C for 30min to form a homogeneous emulsion. Then add 0.064 g of 1,5-diazabicyclo[4.3.0]non-5-ene (TBD) therein and continue stirring until the mixture is uniform. Then the homogeneous emulsion was scraped into a polytetrafluoroethylene mold, and the mold was placed in a constant temperature oven at 60°C for 4h. Afterwards, the temperature was raised to 120° C. for 3 hours to obtain a white material film, that is, a Vitrimer material.

[0032] Described in conjunction with the accompanying drawings, figure 1 It is the infrared spectrum comparison chart of the Vitrimer material (CMC-DGEBA) prepared in Example 1 and bisphenol A diglycidyl ether (DGEBA), and the peak position of the epoxy group is at 916cm -1...

Embodiment 2

[0034]Dissolve 0.500g of succinylated cellulose and 0.200g of sorbitol in 5mL of distilled water and 2mL of ethanol mixed solvent while stirring at 50°C. After the solution is clear and transparent, add 0.390g of bisphenol F diglycidyl ether and add Continue rapid stirring for 30 min at 60°C to form a homogeneous emulsion. Then add DBU 0.032g therein and continue to stir until the mixture is uniform. Then the homogeneous emulsion was scraped into a polytetrafluoroethylene mold, and the mold was placed in a constant temperature oven at 70°C for 2h. Afterwards, the temperature was raised to 135° C. for 2 hours to obtain a white material film, that is, a Vitrimer material.

Embodiment 3

[0036] Dissolve 0.500g of cellulose acetate phthalate and 0.200g of isosorbide in 5mL of distilled water and 2mL of methanol mixed solvent while stirring at 65°C, and add ethylene glycol diglycidyl ether to the solution after it is clear and transparent 0.390g and continued rapid stirring at 65°C for 30min to form a homogeneous emulsion. Then add DMAP 0.064g therein and continue to stir until the mixture is uniform. Then the homogeneous emulsion was scraped into a polytetrafluoroethylene mold, and the mold was placed in a constant temperature oven at 65°C for 3.5h. Afterwards, the temperature was raised to 120° C. for 2.5 hours to obtain a yellow material film, that is, a Vitrimer material.

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Abstract

The invention belongs to the technical field of vitrimer material preparation, and designs a preparation method of a dynamic ester bond vitrimer material based on carboxyl-containing biomass polysaccharide. According to the preparation method, carboxyl-containing polysaccharide and biomass polyol are used as preparation raw materials, so that the use of petrochemical products in related fields isreduced, the problem of environmental pollution caused by large-scale use of petrochemical raw materials is relieved, and the problems of resource waste and environmental pollution caused by non-reusability of common plastic are solved. According to the method, biomass polysaccharide containing carboxyl and biomass polyol are used as raw materials, glycidyl ether is used as a cross-linking agent,and a three-dimensional network structure rich in a large number of ester groups is formed under the catalytic action of a catalyst through esterification reaction of carboxyl and epoxy groups. The biomass polysaccharide vitrimer material prepared by the preparation method disclosed by the invention is a novel, green and renewable vitrimer material.

Description

technical field [0001] The invention belongs to the technical field of preparation of Vitrimer materials, and relates to a method for preparing Vitrimer materials based on carboxyl-containing polysaccharides and dynamic ester bonds. Background technique [0002] It has been 110 years since the invention of thermoset materials. Thermosetting materials are characterized by high strength and high modulus due to the formation of covalently cross-linked structures, and have been widely used in aerospace, construction, transportation, automobile industry and commodity industry. However, due to this strong covalent cross-linking effect, waste thermosetting materials cannot be reshaped and recycled, and can only be landfilled or incinerated, causing great environmental pollution and waste of resources. Such waste materials are one of the most serious pollution sources threatening the human living environment. At present, it is considered that one of the effective strategies to sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/28C08L1/10C08L1/14C08L5/04C08L3/08C08K5/053C08K5/1515C08K5/1535C08L71/02C08J3/24C08J5/18
CPCC08J3/24C08J3/246C08J5/18C08J2301/10C08J2301/14C08J2301/28C08J2303/08C08J2305/04C08J2371/02C08J2401/14C08J2403/08C08J2405/04C08K5/053C08K5/1515C08K5/1535C08K2201/014
Inventor 具本植李常
Owner DALIAN UNIV OF TECH
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