Polyurethane elastic fibers with multielement functionality and preparation method thereof

A polyurethane elastic and functional technology, which is applied in the field of preparation and application of glycyrrhetic acidified chitosan quaternary ammonium salt and its nanoparticles, can solve the problem that no glycyrrhetic acidified chitosan quaternary ammonium salt functional material, antioxidant performance degradation, complex synthesis methods, etc., to achieve broad industry application prospects, improve fracture strength, and simple preparation methods.

Active Publication Date: 2014-03-26
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Chinese patent CN1019299074 discloses a water-soluble chitosan quaternary ammonium salt antibacterial finishing agent. Among sugars, it has good water solubility, and its bacteriostatic rate when applied to cellulose is close to 100%, but its synthesis method is relatively complicated, and it cannot be directly applied to the production of spandex. Decreased oxidation performance
Chinese patent CN101974102 introduces fructose and N,N-diethylethylenediamine into the amino groups of chitosan structural units, and the chitosan derivatives have good solubility in aqueous solution, and have antibacterial, moisturizing and antibacterial properties. The role of oxidation, but it is not mentioned that this material is used in the spandex industry, and its compatibility with polyurethane stock solution is poor
[0005] At present, there is no functional material of glycyrrhetinic acidified chitosan quaternary ammonium salt synthesized by introducing glycyrrhetinic acid and betaine into chitosan, and the nano-particles prepared by adding it to polyurethane spinning stock solution have multiple functions. Related reports and patents of polyurethane elastic fiber

Method used

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  • Polyurethane elastic fibers with multielement functionality and preparation method thereof
  • Polyurethane elastic fibers with multielement functionality and preparation method thereof
  • Polyurethane elastic fibers with multielement functionality and preparation method thereof

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preparation example Construction

[0036] A kind of preparation method of polyurethane elastic fiber with multiple functionalities of the present invention comprises the following steps:

[0037] (1) Prepolymerization reaction is carried out by polytetramethylene ether glycol and 4,4-diphenylmethane diisocyanate in N,N-dimethylacetamide solution, and then ethylenediamine, 1,2- A mixture of propylenediamine and diethylamine undergoes a chain extension reaction to obtain a polyurethane stock solution;

[0038] (2) Synthesis of glycyrrhetinated chitosan quaternary ammonium salt and prepared into nanoparticles;

[0039] (3) Glycyrrhetinated chitosan quaternary ammonium nanoparticles, N,N-dimethylacetamide, anti-ultraviolet additive UV-320, dyeing auxiliary agent SAS, matting agent titanium dioxide and lubricant magnesium stearate were mixed with A part of the above polyurethane stock solution is fully mixed in a grinder to form a low-viscosity additive slurry, and then added to the polyurethane stock solution to p...

Embodiment 1

[0051] Step 1 Synthesis of Glycyrrhetinized Chitosan Quaternary Ammonium Salt: Dissolve 2g of chitosan with a molecular weight of 20,000 and a degree of deacetylation of 90% and 0.85g of betaine in 100ml of 2% (v / v) dilute acetic acid solution , adjust its pH to 5.5, add the catalyst EEDQ and mix and stir, react at room temperature for 12 hours, then acidify with concentrated hydrochloric acid to obtain the intermediate product, then adjust the pH to 3.5 after the intermediate product is dialyzed, and then add 80ml of 0.92g to the above solution EDC·HC1 and 0.56g NHS-activated DMF solution of 2.03g glycyrrhetinic acid, under the condition of magnetic stirring, reacted at room temperature for 12-72h, then left to precipitate with acetone, then washed the precipitate with ethanol and ether, vacuumed at room temperature After drying, the quaternary ammonium salt of glycyrrhetinated chitosan is obtained.

[0052] Step 2 Preparation of glycyrrhetinated chitosan quaternary ammonium ...

Embodiment 2

[0056] Polyurethane elastic fibers were prepared according to the same method described in Example 1, except that the amount of glycyrrhetinated chitosan quaternary ammonium salt nanoparticles added was 1.5 wt% relative to the solid content of the polyurethane spinning stock solution.

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Abstract

The invention relates to polyurethane elastic fibers with multielement functionality and a preparation method thereof. The preparation method comprises the steps of preparing a synthesized glycyrrhetic acid chitosan quaternary ammonium salt into nanoparticles; uniformly dispersing the nanoparticles into a polyurethane stock solution by adopting a slurry technology and mechanical stirring; then performing dry spinning on a spinning stock solution to obtain the polyurethane elastic fibers with multielement functionality. The polyurethane elastic fibers has the beneficial effects as follows: 1, the prepared nanoparticles are added into the polyurethane stock solution, so that the problem of poor compatibility between the glycyrrhetic acid chitosan quaternary ammonium salt and the stock solution and the negative effect on the fiber performance, caused by the problem, are solved, and the breaking strength of the fibers can be improved; 2, the nanoparticles have amphipathy, and a charge passage can be established in a fiber interface to ensure that the fibers have an effect of inhibiting generation of static electricity; 3, due to the introduction of glycyrrhetic acid, the obtained polyurethane fibers have an obvious effect of eliminating oxygen free radicals; 4, due to the introduction of quaternary ammonium groups, the antibacterial properties of the fibers are improved.

Description

technical field [0001] The invention relates to the field of preparation and application of glycyrrhetinated chitosan quaternary ammonium salt and its nanoparticles, in particular to the application of glycyrrhetinated chitosan quaternary ammonium salt nanoparticles in polyurethane elastic fibers. In particular, glycyrrhetinic acid and betaine are introduced into the amino groups of chitosan molecular chains to synthesize this kind of functional material, and prepare nanoparticles for spandex. The polyurethane elastic fiber prepared by the invention has multiple functions of antistatic, antioxidation and antibacterial, and the nano particles can improve the breaking strength of the fiber. Background technique [0002] Polyurethane elastic fiber, commonly known as spandex, has excellent elastic function and stress resistance, and its elongation at break can usually reach 400% to 800%. After mechanical deformation, it can almost completely return to the original shape, and has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10D01F1/09C08B37/08C08G18/48C08G18/10
Inventor 陈厚翔周建军梁红军席青费长书刘亚辉温作杨
Owner ZHEJIANG HUAFENG SPANDEX
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