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Vegetable oil modified ethyl cellulose and preparation method thereof

A technology for the modification of ethyl cellulose and vegetable oil, which is applied in the field of modified ethyl cellulose synthesis, and can solve problems such as environmental pollution, brittle texture and easy breakage, affecting the performance and service life of ethyl cellulose materials

Pending Publication Date: 2021-03-12
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Ethyl cellulose has excellent film-forming performance, but its texture is brittle and easy to break. The flexibility of ethyl cellulose film can be changed by adding plasticizers, but plasticizers are easy to volatilize and be extracted by solvents during use, which seriously affects the ethyl cellulose film. The performance and service life of cellulose-based materials, the migration of plasticizers will also pollute the environment

Method used

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  • Vegetable oil modified ethyl cellulose and preparation method thereof
  • Vegetable oil modified ethyl cellulose and preparation method thereof
  • Vegetable oil modified ethyl cellulose and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 3 g of soybean oil and 7 g of ethyl cellulose were dissolved in 150 mL of tetrahydrofuran, 0.1 g of sodium methoxide was added, the temperature was controlled at 60 ° C, and the reaction was stirred for 24 h under nitrogen protection. 10wt.% methanol aqueous solution is used to precipitate the polymer, and the soybean oil modified ethyl cellulose is obtained after separation and drying. Use proton nuclear magnetic spectrum to utilize internal standard method to measure the content of unsaturated double bond in the modified ethyl cellulose, the results are shown in Table 1 and figure 2 .

Embodiment 2

[0027] 4g of soybean oil and 6g of ethyl cellulose were dissolved in 150mL of tetrahydrofuran, 0.1g of sodium methoxide was added, the temperature was controlled at 60°C, and the reaction was stirred for 24h under nitrogen protection. 10wt.% methanol aqueous solution is used to precipitate the polymer, and the soybean oil modified ethyl cellulose is obtained after separation and drying. The content of unsaturated double bonds in the modified ethyl cellulose was determined by the internal standard method by proton nuclear magnetic spectroscopy, and the results are shown in Table 1.

Embodiment 3

[0029] 5g of soybean oil and 5g of ethyl cellulose were dissolved in 150mL of tetrahydrofuran, 0.1g of sodium methoxide was added, the temperature was controlled at 60°C, and the reaction was stirred for 24h under nitrogen protection. 10wt.% methanol aqueous solution is used to precipitate the polymer, and the soybean oil modified ethyl cellulose is obtained after separation and drying. Use proton nuclear magnetic spectrum to utilize internal standard method to measure the content of unsaturated double bond in the modified ethyl cellulose, the results are shown in Table 1 and image 3 .

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Abstract

The invention relates to vegetable oil modified ethyl cellulose and a preparation method thereof, and the vegetable oil modified ethyl cellulose is obtained by carrying out hydroxyl alcoholysis reaction of an ethyl cellulose structure on ethyl cellulose and vegetable oil under the catalytic action of sodium methoxide. By regulating the content of the vegetable oil in the alcoholysis reaction, themodified ethyl cellulose material with different mechanical properties, transparency, pyrolysis properties and chemical degradation properties can be obtained. The material has potential application value in the fields of food packaging, toys for children and the like.

Description

technical field [0001] The invention belongs to the technical field of synthesizing modified ethyl cellulose, and in particular relates to a vegetable oil modified ethyl cellulose and a preparation method thereof. Background technique [0002] Ethyl cellulose is an important natural polymer material, also known as cellulose ether, referred to as EC (abbreviation of EthylCellulose). White fine-grained thermoplastic solid, the standard product contains 47% to 48% ethoxylate, relative density 1.07, moisture absorption 20%. Stable to heat, no gelation when heated, softening point 100-130°C, good film-forming performance. Soluble in many organic solvents, can be mixed with resins, waxes, oils and plasticizers. Its properties are related to the ethoxy content. When the ethoxy content is high, its solubility in organic solvents increases, while its softening point and hygroscopicity decrease. It is obtained by the action of alkaline cellulose and ethyl chloride or diethyl sulfat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B3/10C08G81/00
CPCC08B3/10C08G81/00
Inventor 贾普友周永红胡立红刘承果张猛冯国东薄采颖
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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