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Gutta-percha and nanocellulose composite film and preparation method thereof

A technology of nanocellulose and composite film, applied in the field of composite film, can solve the problems of pollution and high cost of modification of eucommia gum, and achieve the effect of expanding the field of preparation and good elasticity

Active Publication Date: 2017-11-24
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So researchers improved the performance of Eucommia gum material through isomerization and vulcanization, but the cost of modification of Eucommia gum is high and the pollution is serious

Method used

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  • Gutta-percha and nanocellulose composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 1g of eucommia gum, stir at 50°C and 100rpm for 10min, dissolve it in 5ml of petroleum ether to obtain eucommia gum solution; weigh 0.01g of nanocellulose, add it to the above Eucommia gum solution, and stir at 100rpm for 10min Finally, the mixed solution is obtained; the above mixed solution is poured on a glass plate, and after ventilating and drying at room temperature for 3h, a composite film of Eucommia gum and nanocellulose is obtained. After measuring, the maximum tensile strength of the above-mentioned composite film is 10MPa, and the elongation at break to 200%.

Embodiment 2

[0027] Weigh 1g of eucommia gum, stir for 20min at a temperature of 60°C and a speed of 500rpm, dissolve it in 10ml of cyclohexane to obtain a eucommia gum solution; weigh 0.1g of nanocellulose, and add it to the above Eucommia gum solution, and stir at a speed of 200rpm After 15 minutes, the mixed solution was obtained; the above mixed solution was poured on a flat plastic plate at the bottom, and after ventilating and drying at room temperature for 4 hours, a composite film of Eucommia gum and nanocellulose was obtained. The maximum tensile strength of the above composite film was determined to be 12.4MPa , The elongation at break was 241%.

Embodiment 3

[0029] Weigh 1g of eucommia gum, stir for 15min at a temperature of 50°C and a speed of 300rpm, dissolve it in 15ml of dichloromethane to obtain a eucommia gum solution; weigh 0.15g of nanocellulose, and add it to the above Eucommia gum solution, and stir at a speed of 500rpm After 20 minutes, the mixed solution was obtained; the above mixed solution was poured into a glass mold with a flat bottom, and after ventilating and drying at room temperature for 5 hours, a composite film of Eucommia gum and nanocellulose was obtained. The maximum tensile strength of the above composite film was determined to be 14.8MPa , The elongation at break was 295%.

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Abstract

The invention discloses a gutta-percha and nanocellulose composite film and a preparation method thereof, and relates to the technical field of composite films. The preparation method comprises the following steps: dissolving gutta-percha into an organic solvent to obtain a gutta-percha solution; adding nanocellulose to the gutta-percha solution; stirring to obtain a mixed solution; pouring the mixed solution into a flat plate or a die of which the bottom is flat; ventilating and drying under a room temperature to obtain the gutta-percha and nanocellulose composite film. According to the method, gutta-percha and nanocellulose are composited to form a macromolecular film for the first time; the elongation at break is 200-365%; the gutta-percha and nanocellulose composite film is degradable, green, environmentally friendly, and renewable; the preparation method is simple, efficient, and free from any additive.

Description

technical field [0001] The invention relates to the technical field of composite films, in particular to a composite film of Eucommia gum and nano-cellulose and a preparation method thereof. Background technique [0002] Petroleum-based plastic films are depleted of petroleum resources and pollute the environment due to their limited resources and their inability to be degraded by microorganisms. With the increasing awareness of sustainable development and environmental protection, renewable and biodegradable biomass-based films more and more attention. Biomass-based films are mainly composed of natural polymer compounds such as cellulose, starch, chitosan, protein, lignin, hemicellulose, natural rubber, etc. and their derivatives. They are used in packaging, optics, electrical components, membrane separation, Many fields such as water treatment have important potential application value. [0003] Nanocellulose is a rigid rod-shaped cellulose with a diameter of 1-100nm and...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L1/02C08J5/18
CPCC08J5/18C08J2307/00C08J2401/02C08L7/00C08L2201/06C08L2203/16C08L1/02
Inventor 彭湃孙倩倩佘雕赵新坤王冬梅董娟娥张军华
Owner NORTHWEST A & F UNIV
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