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Method using wine grape residues to prepare leveling agent

A technology of leveling agent and residue, applied in the field of preparation of leveling agent, can solve the problems of waste of resources, pollution of the environment rich in organic matter, etc., and achieve the effect of high degree of esterification

Inactive Publication Date: 2018-11-02
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of biological and chemical oxygen demand, because it is rich in organic matter, it seriously pollutes the environment and causes waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Cellulose Extraction from Wine Grape Residue

[0017] Extract 1000 grams of wine grape residue dry residue in a mixed solvent solution with a volume ratio of toluene:methanol of 2:1 for 6 hours to remove fat-soluble molecules, filter and dry to obtain a solid residue; weigh 500 grams of the solid residue and disperse it in deionized water , adjust the pH value to about 4.0, add 500 grams of sodium chlorite to react at 70 degrees Celsius for 1 hour, wash with ethanol for 3 times, filter and dry to obtain solid particles. Weigh 200 grams of solid particles and disperse them into deionized water, add 400 milliliters of 5% sodium hydroxide solution by mass to react at 60 degrees Celsius for 4 hours, filter, wash with deionized water until neutral and dry to obtain cellulose.

Embodiment 2

[0018] Embodiment two: the esterification process of cellulose

[0019] Get 100 grams of cellulose obtained in Example 1, add 100 grams of n-butyric acid and 20 grams of acetic anhydride, add 20 milliliters of concentrated sulfuric acid dropwise under mechanical stirring; reaction temperature: 60 degrees Celsius; add 500 grams of mL of deionized water was washed and dried to obtain cellulose ester.

Embodiment 3

[0020] Example three: Characterization of the structural properties of cellulose ester

[0021] Take 10 mg of cellulose ester prepared in Example 2 and dissolve it in 5 ml of tetrahydrofuran solution. Using ultra-high performance polymer chromatography (APC) and polystyrene as a standard sample, the number average molecular weight measured is about 22,000, and the molecular weight distribution is About 1.5; Get 100 milligrams of cellulose esters prepared by embodiment case two and select the rotational rheometer for use and its viscosity is 1.8s / pa. H NMR spectrum characterization shows that its acetyl content is 10.1%, butyryl content is 48.6%, and hydroxyl content is about 2.9%. Differential scanning calorimetry (DSC) testing indicated a melting point of 168.6 degrees Celsius and a glass transition temperature of 125.2 degrees Celsius. Adding it as a coating additive to polyacrylate coatings has a good leveling effect and no shrinkage cavity.

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Abstract

The invention relates to a method using wine grape residues to prepare a leveling agent. The method includes: extracting cellulose in the wine grape residues, and performing esterification. Celluloseextraction is performed on traditional waste grape residues in a wine brewing process after the impurities such as fat-soluble molecules, lignin and hemicellulose of the grape residues are removed, and the low-molecular-weight cellulose after wine brewing fermentation is used to perform esterification reaction so as to prepare the high-quality leveling agent. The prepared cellulose ester-based leveling agent is widely applicable in fields such as car coating, plastic coating and glass coating and is high in leveling level.

Description

technical field [0001] The invention relates to a method for preparing a leveling agent by using wine grape residues, including cellulose extraction, cellulose esterification and a method for characterizing the performance of the leveling agent, belonging to the field of coatings and leveling agents. Background technique [0002] Paint is an organic substance in a fluid state or a powder state, which can evenly cover the surface of an object and firmly adhere to the surface of an object. Coatings can not only protect and decorate, but also have special functions such as insulation, conductivity, anti-static, temperature display, mildew resistance, and sterilization. The development of coating technology reflects a country's industrialization level, technological development, people's living standards and national defense. It is playing an increasingly prominent role in the development of the national economy. However, no matter what kind of coating methods are used for coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/47C08B7/00D21C5/00
CPCC08B7/00C09D7/47D21C5/005
Inventor 柏良久陈厚姜昕言王文香杨丽霞杨华伟魏东磊
Owner LUDONG UNIVERSITY
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