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

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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 pol

Method used

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

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[0030] Example 1

[0031] A preparation method of modified polylactic acid biodegradable composite fiber containing milk protein includes the following steps:

[0032] a. Preparation of modified polylactic acid containing milk protein: 1. Measure 1000 parts by weight of fresh pure milk in a graduated cylinder, place it in an evaporator and evaporate under reduced pressure for 12 hours, then take it out and place it in a conical flask. Placed in a centrifuge, the rotation speed of the centrifuge is set to 1000r / min, after 4h centrifugation, 100 parts by weight of NaOH aqueous solution are added to separate the protein in the lye, and 50 parts by weight of 3% NaCl solution are added. The protein is precipitated, and the precipitated protein is collected in an Erlenmeyer flask to obtain 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 , Melt-initiated grafting is carried out in an internal mixer to obtain a lar...

Example Embodiment

[0036] Example 2

[0037] A preparation method of degradable composite fiber includes the following steps:

[0038] a. Preparation of modified polylactic acid containing milk protein: 1. Measure 1000 parts by weight of fresh pure milk in a graduated cylinder, place it in an evaporator and evaporate under reduced pressure for 12 hours, then take it out and place it in a conical flask. Placed in a centrifuge, the centrifuge speed is set to 1100r / min, after 4 hours of centrifugation, 110 parts by weight of NaOH aqueous solution are added to separate the protein in the lye, and 50 parts by weight of 3% NaCl solution are added. The protein is precipitated. Collect the precipitated protein in an Erlenmeyer flask to obtain 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 , Melt-initiated grafting is carried out in an internal mixer to obtain a large molecular weight modified polylactic acid containing milk protei...

Example Embodiment

[0042] Example 3

[0043] A preparation method of modified polylactic acid biodegradable composite fiber containing milk protein includes the following steps:

[0044] a. Preparation of modified polylactic acid containing milk protein: 1. Measure 1000 parts by weight of fresh pure milk in a graduated cylinder, place it in an evaporator and evaporate under reduced pressure for 12 hours, then take it out and place it in a conical flask. Placed in a centrifuge, the centrifuge speed is set to 1300r / min, after 4h centrifugation, 118 parts by weight of NaOH aqueous solution are added to separate the protein in the lye, and 50 parts by weight of 3% NaCl solution are added. The protein is separated, and the separated protein is collected in an Erlenmeyer flask to obtain 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 , Melt-initiated grafting is carried out in an internal mixer to obtain a large molecular weight mo...

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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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