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Preparation method of chitosan/hydroxyapatite composite fiber

A hydroxyapatite and composite fiber technology, which is applied in the chemical characteristics of fibers, rayon manufacturing, textiles and papermaking, etc., can solve the problems of reducing the molecular weight of chitosan, low strength, lack of practical use value, etc., and achieves increased recycling. The effect of burden, avoiding changes such as chitosan molecular chain breakage

Active Publication Date: 2018-10-02
嘉兴市荣明佳通纺织科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of graphene oxide improves the mechanical strength of chitosan fibers to a certain extent, but the mixing time of chitosan and graphene oxide is as long as 6 hours, and the excessively long mixing process will inevitably reduce the molecular weight of chitosan, resulting in The strength of the prepared chitosan / graphene oxide composite fiber is lower than 160MPa, lacking practical use value (Mechanical and dye adsorptionproperties of graphene oxide / chitosan composite fibers prepared by wetspinning.Carbohydrate polymers,2014,102:755-761.)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of chitosan / hydroxyapatite composite fiber, comprising the steps of:

[0031] 1) The acetic acid solution with a concentration of 1 wt% is used to dissolve the weight-average molecular weight of 5×10 5 , deacetylation degree is 90% low-molecular-weight chitosan, and the concentration of prepared low-molecular-weight chitosan is 3wt% carrier solution;

[0032] 2) Mix the hydroxyapatite powder with an average particle size of 0.19 μm and the carrier solution through a screw extruder at a stirring rate of 100 rpm for 0.5 hours to prepare a hydroxyapatite mother liquor, wherein the low molecular weight shell The mass ratio of polysaccharide to hydroxyapatite powder is 10:1;

[0033] 3) Injecting the hydroxyapatite mother liquor into a concentration of 3wt% in the mode of online addition, the weight-average molecular weight of chitosan is 8×10 5 , a chitosan spinning solution with a degree of deacetylation of 90%, wherein the mass ratio of the chitosan...

Embodiment 2

[0036] A preparation method of chitosan / hydroxyapatite composite fiber, comprising the steps of:

[0037] 1) The acetic acid solution with concentration of 1.2wt% is used to dissolve the weight-average molecular weight of 5.1×10 5, deacetylation degree is 90% low-molecular-weight chitosan, the concentration that makes low-molecular-weight chitosan is 3.2wt% carrier solution;

[0038] 2) Mix the hydroxyapatite powder with an average particle size of 0.28 μm and the carrier solution through a screw extruder at a stirring rate of 110 rpm for 0.6 hours to prepare a hydroxyapatite mother liquor, wherein the low molecular weight shell The mass ratio of polysaccharide to hydroxyapatite powder is 10:1;

[0039] 3) The concentration of the hydroxyapatite mother liquor is 3.2wt%, and the weight-average molecular weight of chitosan is 8.3×10 5 , a chitosan spinning solution with a deacetylation degree of 90%, wherein the mass ratio of the chitosan spinning solution to the hydroxyapatit...

Embodiment 3

[0042] A preparation method of chitosan / hydroxyapatite composite fiber, comprising the steps of:

[0043] 1) The acetic acid solution with a concentration of 1.5wt% is used to dissolve the weight-average molecular weight of 5.2×10 5 , deacetylation degree is 90.5% low-molecular-weight chitosan, the concentration that makes low-molecular-weight chitosan is 3.5wt% carrier solution;

[0044] 2) Mix the hydroxyapatite powder with an average particle size of 0.27 μm and the carrier solution through a kneader at a stirring rate of 120 rpm for 0.7 hours to prepare a hydroxyapatite mother liquor, wherein the low molecular weight chitosan The mass ratio to hydroxyapatite powder is 9:1;

[0045] 3) The concentration of the hydroxyapatite mother liquor is 3.4wt%, and the weight-average molecular weight of chitosan is 8.6×10 5 , a chitosan spinning solution with a deacetylation degree of 90.6%, wherein the mass ratio of the chitosan spinning solution to the hydroxyapatite mother liquor ...

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Abstract

The invention relates to a preparation method of chitosan / hydroxyapatite composite fibers. The preparation method includes the steps of 1), dissolving low-molecular-weight chitosan by adopting chitosan solvent to obtain a carrier solution; 2), mixing hydroxyapatite ha powder with the carrier solution through the high shearing action provided by stirring equipment to obtain hydroxyapatite mother liquid; 3), injecting a chitosan spinning liquid into the hydroxyapatite mother liquid in an online adding mode to obtain the chitosan / hydroxyapatite spinning liquid, and subjecting the chitosan / hydroxyapatite spinning liquid to a wetting method or a dry spraying wet method to obtain the chitosan / hydroxyapatite composite fibers. By the arrangement, the hydroxyapatite ha powder is uniformly distributed, an adopted carrier is formed with coagulation of the fibers, and no additional additives are added to the solvent and coagulation bath system. The preparation method is simple and efficient in forming, and the functional chitosan fibers can be produced on the basis of conventional production lines.

Description

technical field [0001] The invention belongs to the field of functional fibers and relates to a preparation method of chitosan / hydroxyapatite composite fibers. Background technique [0002] Chitosan is obtained by deacetylation of chitin, which exists widely in nature, and chitosan fiber is formed by wet spinning. Chitosan fibers have good biological antibacterial properties, biocompatibility and biodegradability, and are widely used in the fields of tissue engineering and wound repair. Hydroxyapatite is the main component of human bones and teeth, can promote bone repair, and is a bone tissue repair material. The chitosan / hydroxyapatite composite material can combine the excellent properties of the two materials to obtain a biological bone tissue material with excellent biological activity and biocompatibility. For example, Chinese patent ZL201310210932.4 discloses the preparation method of hydroxyapatite / chitosan composite coating; Chinese patent 201310405054.1 discloses...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/00D01F1/10D01F8/18
CPCD01F1/10D01F8/18D01F9/00
Inventor 姚勇波颜志勇李喆胡英易洪雷
Owner 嘉兴市荣明佳通纺织科技股份有限公司
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