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Method for preparing colored nanometer cellulose/polylactic acid composite film

A nanocellulose, composite film technology, applied in dyeing, textiles and papermaking, etc., can solve the problems of low dyeing rate of polylactic acid, poor color fastness, damage to physical and mechanical properties, etc., and achieve rich colors, simple methods, The effect of expanding the application field

Inactive Publication Date: 2018-09-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the dyeing of polylactic acid mainly focuses on the dyeing of polylactic acid fibers. The commonly used dyeing method is high temperature and high pressure dyeing with disperse dyes. High temperature water bath will cause the degradation of polylactic acid and destroy the physical and mechanical properties. Problems such as poor color fastness
At present, the dyeing method of polylactic acid film is rarely reported in China

Method used

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  • Method for preparing colored nanometer cellulose/polylactic acid composite film
  • Method for preparing colored nanometer cellulose/polylactic acid composite film

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A method for preparing colored nanocellulose / polylactic acid composite film, the specific steps are:

[0029] (1) Nanocellulose suspension prepared by dyeing nanocellulose with reactive dyes: 98g of regenerated nanocellulose suspension (mass fraction is 1.02%), 0.1g reactive yellow 145 dyestuff and 2g deionized water were added to In a three-neck flask equipped with a heating device, a stirring device, and a reflux condensing device, use a 300r / min stirrer to mechanically stir at 30°C for 15min, then add 3g of sodium chloride, and continue stirring at 25°C for 15min; The heating rate of / min raises the temperature to the color-fixing temperature of 70°C. At this time, 3g of sodium carbonate is added, kept for 60min, and then the temperature is lowered from 70°C to room temperature. Pour the stained suspension into a centrifuge tube and centrifuge in a high-speed centrifuge until the upper layer of the centrifuge tube is colorless. Then, 0.5 g of soaping agent (H95, Lan...

Embodiment 2

[0032] A method for preparing colored nanocellulose / polylactic acid composite film, the specific steps are:

[0033] (1) Nanocellulose suspension prepared by dyeing nanocellulose with reactive dyes: 98g of regenerated nanocellulose suspension (mass fraction is 1.02%), 0.1g reactive red 24 dyestuff and 2g deionized water were added to In a three-neck flask equipped with a heating device, a stirring device, and a reflux condensing device, use a 300r / min stirrer to mechanically stir at 30°C for 15min, then add 3g of sodium chloride, and continue stirring at 25°C for 15min; The heating rate of / min raises the temperature to the color-fixing temperature of 70°C. At this time, 3g of sodium carbonate is added, kept for 60min, and then the temperature is lowered from 70°C to room temperature. Pour the stained suspension into a centrifuge tube and centrifuge in a high-speed centrifuge until the upper layer of the centrifuge tube is colorless. Then, 0.5 g of soaping agent (H95, Lanxess...

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Abstract

The invention provides a method for preparing a colored nanometer cellulose / polylactic acid composite film. The method is characterized by comprising the following steps that 1, dyed nanometer cellulose emulsion is prepared; 2, polylactic acid is dissolved in an organic solvent; the dyed nanometer cellulose emulsion is used as a water phase; an oil phase dissolved with the polylactic acid is added; homogenizing is performed; pickering emulsion is prepared; 3, an organic solvent in the pickering emulsion is volatilized; filtering and drying are performed to obtain colored composite microspheres; the colored composite microspheres are subjected to hot pressing; the colored nanometer cellulose / polylactic acid composite film is obtained through preparation. By the pickering emulsion method, the colored nanometer cellulose is uniformly dispersed into a polylactic acid matrix; the performance of the composition material can be enhanced; the rich color can also be given to the composite material; the application field of the composite material can be greatly expanded. The method is simple; the energy is saved; the environment is protected; the dyeing of the reactive dyes on the polylacticacid is indirectly realized.

Description

technical field [0001] The invention relates to a preparation method of a colored transparent polylactic acid film, in particular to a preparation method of a colored nanocellulose / polylactic acid composite material, and belongs to the technical field of polylactic acid nanocomposite materials. Background technique [0002] Polylactic acid (PLA) is a biodegradable thermoplastic polymer material prepared from lactic acid from plant resources. Polylactic acid has processability, biocompatibility, and biodegradability. It is a bio-based polyester that is easy for industrial processing. It can be used in many fields such as food packaging, textile fibers, engineering plastics, and biomedicine. At present, the dyeing of polylactic acid mainly focuses on the dyeing of polylactic acid fibers. The commonly used dyeing method is high temperature and high pressure dyeing with disperse dyes. High temperature water bath will cause the degradation of polylactic acid and destroy the physi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L1/02C08J5/18D06P3/66D06P1/38D06P1/673D06P5/10D06P5/02
CPCC08J5/18C08J2367/04C08J2401/02C08L67/04D06P1/38D06P1/67358D06P3/66D06P5/02D06P5/10C08L1/02
Inventor 隋晓锋张云崇王碧佳毛志平徐红张琳萍钟毅明彬彬丁雷蒋阳
Owner DONGHUA UNIV
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