A kind of tung oil modified ethyl cellulose membrane and preparation method thereof

A technology of ethyl cellulose and modification, which is applied in the field of materials, can solve the problems of low wrinkle resistance and poor toughness of ethyl cellulose film, and achieve the effects of controllable flexibility, simple synthesis and high yield

Active Publication Date: 2019-05-14
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved: single ethyl cellulose film has disadvantages such as poor toughness and low anti-wrinkle performance. In order to improve its shortcomings, the present invention introduces the flexible segment of modified tung oil into ethyl cellulose to strengthen Toughness and wrinkle resistance of ethyl cellulose film, a tung oil modified ethyl cellulose film and its preparation method are designed, which can improve the toughness and wrinkle resistance of tung oil-based ethyl cellulose film

Method used

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  • A kind of tung oil modified ethyl cellulose membrane and preparation method thereof
  • A kind of tung oil modified ethyl cellulose membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Add methyl chelate to the reaction container, then add maleic anhydride according to the molar ratio of 1:1.1 between methyl licate and maleic anhydride, react at a constant temperature of 180°C, stir for 2.0h, after the reaction is completed, raise the temperature to Extract the unreacted maleic anhydride under reduced pressure at 200°C. After the extraction is complete, TMA is obtained; weigh ethyl cellulose in a reaction vessel, and then add it according to the mass ratio of ethyl cellulose / glacial acetic acid of 1:17 With glacial acetic acid, raise the temperature to 60°C, keep stirring for 6 hours, after the ethyl cellulose is completely dissolved, cool to room temperature to obtain the ethyl cellulose solution; add TMA and 0.1% hydroquinone to the reaction vessel According to the molar ratio of TMA to ethylcellulose 0.1:1, ethylcellulose solution was added, and when heated to 120°C, anhydrous sodium acetate was added thereto in an equimolar amount to TMA, and the r...

Embodiment 2

[0016] Add methyl chelate to the reaction container, then add maleic anhydride according to the molar ratio of 1:1 between methyl lyceate and maleic anhydride, react at a constant temperature of 175°C, stir for 2.5h, after the reaction is completed, raise the temperature to Extract the unreacted maleic anhydride under reduced pressure at 210°C. After the extraction is complete, TMA is obtained; weigh ethyl cellulose in a reaction vessel, and then use ethyl cellulose / glacial acetic acid at a mass ratio of 1:12 glacial Acetic acid, heat up to 65°C, keep stirring for 5h, after ethylcellulose is completely dissolved, cool to room temperature to obtain ethylcellulose solution; mix TMA and 0.05% di-tert-butylhydroquinone Add it into the reaction vessel, then add the ethyl cellulose solution according to the molar ratio of TMA to ethyl cellulose 0.5:1, when heated to 110°C, add anhydrous sodium acetate which is equal to the molar number of TMA, and stir for 5 hours. After the reactio...

Embodiment 3

[0018] Add methyl chelate to the reaction container, then add maleic anhydride according to the molar ratio of 1:1.2 between methyl licate and maleic anhydride, react at a constant temperature of 178°C, stir for 1.5h, after the reaction is completed, raise the temperature to Extract the unreacted maleic anhydride under reduced pressure at 205°C. After the extraction is complete, TMA is obtained; weigh ethyl cellulose in a reaction vessel, and then add it according to the mass ratio of ethyl cellulose / glacial acetic acid of 1:15 Glacial acetic acid, heat up to 55-65°C, keep stirring for 7 hours, after the ethyl cellulose is completely dissolved, cool to room temperature to obtain the ethyl cellulose solution; add TMA and 0.06% hydroquinone In the reaction vessel, ethyl cellulose solution was added according to the molar ratio of TMA to ethyl cellulose 0.2:1, and when heated to 118°C, anhydrous sodium acetate was added thereto in an equimolar amount to TMA, and the reaction was s...

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Abstract

The invention discloses a tung oil modified ethyl cellulose membrane and a preparation method thereof. The preparation method comprises the following steps: adding methyl eleostearate into a reactor, adding maleic anhydride into the reactor to carry out reactions, after reactions, reducing the pressure, raising the temperature to obtain eleostearate maleic anhydride; weighing ethyl cellulose, adding ethyl cellulose into a reactor, adding an organic solvent, heating, continuous stirring, after the ethyl cellulose is completely dissolved, cooling the solution to the room temperature to obtain an ethyl cellulose solution; adding TMA and a polymerization inhibitor into a reactor, adding the ethyl cellulose solution into the reactor, heating, then adding a catalyst into the reactor, carrying out reactions under stirring, after reactions, washing the reaction product by distilled water to obtain the light yellow precipitate namely TMA-ethyl cellulose; dissolving TMA-ethyl cellulose into an organic solvent, after the TMA-ethyl cellulose is completely dissolved, pouring the solution into a mould, and carrying out film forming at a room temperature. Compared with a single component cellulose membrane, the shortages of the single component cellulose membrane on mechanical properties, wrinkle resistant performance, and thermal stability are overcome, and at the same time, the application range of cellulose membrane is enlarged.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a tung oil modified ethyl cellulose film and a preparation method thereof. Background technique [0002] As the most abundant natural renewable resource on the earth—cellulose, it has been studied by many scholars in recent years. Graft copolymerization has become an important means of chemical modification of cellulose, and it is also one of the ways to prepare biodegradable materials. one. Cellulose has good biocompatibility, low toxicity and degradability, and the cellulose material has the advantages of good water absorption and comfortable wearing. As one of the cellulose derivatives, ethyl cellulose (EC) is a water-insoluble, non-ionic, thermoplastic cellulose alkyl ether, which has the characteristics of chemical resistance, salt resistance, alkali resistance and thermal stability. It is one of the most widely used water-insoluble cellulose derivatives. These excellent characte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B15/00C08G81/00C08J5/18C08L1/08
CPCC08B15/00C08G81/00C08J5/18C08J2301/08
Inventor 李守海毛伟夏建陵黄坤李梅杨雪娟许利娜杨小华张燕
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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