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Modified polylactic acid biodegradable composite fiber containing milk protein

A technology of milk protein and composite fiber, which is applied in fiber treatment, fiber chemical characteristics, conjugated synthetic polymer artificial filament, etc., can solve the problems of poor dyeability and poor hygroscopicity of polylactic acid fiber, and achieve excellent performance, good moisture absorption and breathability properties, good hygroscopicity and dyeability

Inactive Publication Date: 2019-05-14
石狮市中纺学服装及配饰产业研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a biodegradable composite fiber containing milk protein-modified polylactic acid, which is made of modified polylactic acid containing milk protein and polylactic acid as the main raw material. It has the advantages of both polylactic acid fiber and milk protein composite fiber, and through its biocompatible modification, it improves the disadvantages of polylactic acid fiber's poor hygroscopicity and poor dyeability

Method used

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  • Modified polylactic acid biodegradable composite fiber containing milk protein
  • Modified polylactic acid biodegradable composite fiber containing milk protein

Examples

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Embodiment 1

[0031] A method for preparing biodegradable composite fibers containing milk protein-modified polylactic acid, comprising the following steps:

[0032] a. Preparation of modified polylactic acid containing milk protein: 1. Measure 1000 parts by weight of fresh pure milk with a graduated cylinder, place it in an evaporator and evaporate it under reduced pressure for 12 hours, then take it out and place it in a conical flask, and place the conical flask Place in a centrifuge, the centrifuge speed is set to 1000r / min, add 100 parts by weight of NaOH aqueous solution after centrifugation for 4 hours, the protein in the lye is separated, add 50 parts by weight of NaCl solution with a mass fraction of 3%, Precipitate the protein, collect the precipitated protein in the Erlenmeyer flask, and obtain the milk protein for later use; 2. Mix the milk protein, DL-lactide, polyethanol, and initiator in a weight ratio of 5:6:2:0.3 , performing melt-initiated grafting in an internal mixer to ...

Embodiment 2

[0037] A preparation method of degradable composite fibers, comprising the following steps:

[0038] a. Preparation of modified polylactic acid containing milk protein: 1. Measure 1000 parts by weight of fresh pure milk with a graduated cylinder, place it in an evaporator and evaporate it under reduced pressure for 12 hours, then take it out and place it in a conical flask, and place the conical flask Place in a centrifuge, the centrifuge speed is set to 1100r / min, add 110 parts by weight of NaOH aqueous solution after centrifugation for 4 hours, the protein in the lye is separated, add 50 parts by weight of NaCl solution with a mass fraction of 3%, Precipitate the protein, collect the precipitated protein in the Erlenmeyer flask, and obtain the milk protein for later use; 2. Mix the milk protein, DL-lactide, polyethanol, and initiator in a weight ratio of 6:7:3.3:0.4 , performing melt-initiated grafting in an internal mixer to obtain a modified polylactic acid with a large mo...

Embodiment 3

[0043] A method for preparing biodegradable composite fibers containing milk protein-modified polylactic acid, comprising the following steps:

[0044] a. Preparation of modified polylactic acid containing milk protein: 1. Measure 1000 parts by weight of fresh pure milk with a graduated cylinder, place it in an evaporator and evaporate it under reduced pressure for 12 hours, then take it out and place it in a conical flask, and place the conical flask Place in a centrifuge, the centrifuge speed is set to 1300r / min, add 118 parts by weight of NaOH aqueous solution after centrifugation for 4 hours, the protein in the lye is separated, add 50 parts by weight of NaCl solution with a mass fraction of 3%, Precipitate the protein, collect the precipitated protein in the Erlenmeyer flask, and obtain the milk protein for later use; 2. Mix the milk protein, DL-lactide, polyethanol, and initiator in a weight ratio of 8:8:6:0.6 , performing melt-initiated grafting in an internal mixer to ...

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Abstract

The invention discloses a modified polylactic acid biodegradable composite fiber containing milk protein. The modified polylactic acid biodegradable composite fiber containing the milk protein is prepared from the following raw materials in parts by weight: 20-50 parts of modified polylactic acid slices containing the milk protein, 50-80 parts of polylactic acid slices, 0.1-5 parts of a lubricantand 0.1-5 parts of an auxiliary agent through melt polycondensation, drawing, shaping and other processes. The modified polylactic acid biodegradable composite fiber containing the milk protein is mainly prepared from the modified polylactic acid slices containing the milk protein and the polylactic acid slices and has the advantages of a polylactic acid fiber and a milk protein composite fiber, and the defects of poor hygroscopicity and dyeing property of the polylactic acid fiber are overcome through biocompatible modification.

Description

technical field [0001] The invention belongs to the technical field of textile chemical fibers, and in particular relates to a biodegradable composite fiber containing milk protein-modified polylactic acid. Background technique [0002] Polylactic acid is a new type of biodegradable material made from starch raw materials proposed by renewable plant resources (such as corn and sweet potatoes), and polylactic acid fibers are mainly prepared by solvent evaporation spinning method and melt spinning method. Polylactic acid fiber has similar crystallinity, transparency and heat resistance to polyester fiber, and also has good biocompatibility and biodegradability. However, since polylactic acid has a linear polyester structure and few hydrophilic groups, the hygroscopicity of polylactic acid fibers is poor, and the dyeability is worse than that of ordinary textile fibers, which cannot meet people's consumption needs. In recent years, many researchers have conducted a lot of rese...

Claims

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Application Information

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IPC IPC(8): D01F8/02D01F8/14D01F1/10C08G63/08C08G63/78D01D5/253
Inventor 蔡涛邓梦颖郑福尔吴秋兰李建妮吴中献陈美英
Owner 石狮市中纺学服装及配饰产业研究院
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