Preparation method of oriented shell-core structural superfine composite fiber

An ultra-fine composite fiber, orientation technology, applied in the direction of fiber processing, fiber chemical characteristics, cellulose/protein conjugated rayon, etc., can solve the problems of fiber orientation degree, yarn bundle length, yield, and mechanical properties gap.

Inactive Publication Date: 2014-01-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Recently, Teo W E et al [Teo W E, Ramakrishnal S. Nanotechnology, 2006, 17: R89–R106.] and Beachley V et al [Beachley V, Katsanevakis E, Zhang N, et al. Advances in Polymer Science, 2012, 246 :171–212] In recent years, fibers with a certain orientation have been collected by using different fiber collection methods (such as: rotating roller collection, pointed disk collection, parallel electrode collection, double ring collection, water bath collection, etc.) or adjusting magnetic field, electric field, etc. However, these technologies or methods still have a large gap with the requirements of practical applications in terms of the degree of fiber orientation prepared, the length of yarn bundles that can be collected, the yield, and the mechanical properties.

Method used

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  • Preparation method of oriented shell-core structural superfine composite fiber
  • Preparation method of oriented shell-core structural superfine composite fiber
  • Preparation method of oriented shell-core structural superfine composite fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Dissolve 0.1g of hyaluronic acid in 10ml of ammonia water (concentration 25-28%) and trifluoroethanol (TFE) mixed solvent (volume ratio of ammonia water / TFE = 2 / 1) at room temperature, and stir for 24 hours to obtain a mass concentration of 1% (g / ml) shell spinning solution; 0.4g polylactic acid (PLLA, intrinsic viscosity 1.5) and 0.1g ultra-high molecular weight PEO (molecular weight greater than 5,000,000Da) were dissolved in 10g trifluoroethanol at room temperature In the solvent, stir for 24h to obtain the PLLA core layer spinning solution. Use a 10ml syringe, coaxial spinnerets with inner and outer diameters of 2.5 and 3.5 mm, such as figure 2 As shown, the hyaluronic acid shell spinning solution and the PLLA core spinning solution were respectively extracted and fixed on the "jet stable coaxial electrospinning" device as shown in Fig. figure 1 Electrospinning was performed as shown, and the spinning parameters were: voltage 12kV, receiving distance 30cm, ambien...

Embodiment 2

[0043] Dissolve 0.3 g of chitosan (molecular weight 900,000 to 1,000,000 Da) in 10 g of 3% acetic acid aqueous solution at room temperature, and stir for 24 hours to obtain a shell spinning solution with a mass concentration of 3% (g / ml); 0.4g PLLA (intrinsic viscosity 1.5) and 0.1g ultra-high molecular weight PEO (molecular weight greater than 5,000,000Da) were dissolved in 10g trifluoroethanol solvent at room temperature, and stirred for 24 hours to obtain PLLA core layer spinning solution. Use a 10ml syringe, coaxial spinnerets with inner and outer diameters of 2.5 and 3.5 mm, such as figure 2 As shown, the chitosan shell spinning solution and the PLLA core spinning solution were respectively extracted and fixed on the "jet stable coaxial electrospinning" device as shown in Fig. figure 1 Electrospinning is performed as shown, and the spinning parameters are: voltage 9kV, receiving distance 20cm, ambient temperature 20°C, and ambient humidity 32%. The injection rate of th...

Embodiment 3

[0045] Dissolve 0.3g of gelatin in 10ml of trifluoroethanol at room temperature, stir for 24h until the solute is completely dissolved, and obtain a 3% (g / ml) shell layer uniform transparent solution; mix 0.4g PLLA (intrinsic viscosity 1.5) with 0.1 g of ultra-high molecular weight PEO (molecular weight greater than 5,000,000Da) was dissolved in 10 g of trifluoroethanol solvent at room temperature, and stirred for 24 hours to obtain a PLLA core layer spinning solution. Use a 10ml syringe, coaxial spinnerets with inner and outer diameters of 2.5 and 3.5 mm, such as figure 2 As shown, the gelatin shell spinning solution and the PLLA core spinning solution were extracted respectively, and fixed on the "jet stable coaxial electrospinning" device as shown in Fig. figure 1 Electrospinning is performed as shown, and the spinning parameters are: voltage 4.85kV, receiving distance 21cm, ambient temperature 25°C, and ambient humidity 45%. The injection rate of the core layer solution...

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Abstract

The invention relates to a preparation method of oriented shell-core structural superfine composite fiber. The preparation method comprises the steps of dissolving biological activity natural macromolecule in a solvent, and stirring to obtain a shell spinning solution; dissolving polylactic acid (PLLA) and polyoxyethylene (PEO) in the solvent, and stirring to obtain a core spinning solution; and respectively extracting the shell spinning solution and the core spinning solution, jetting and stably and coaxially electrospining to obtain the shell-core structural superfine composite fiber. The shell-core structural superfine composite fiber, which effectively combines synthetic materials and natural materials, integrates mechanical performance and biocompatibility of fiber and can prepare the shell-core structural superfine composite fiber which is relatively high in orientation degree in large scale as conventional mechanical spinning; and the oriented superfine composite fiber prepared by the preparation method has application prospect in repairing tendon, ligament and other tissues.

Description

technical field [0001] The invention belongs to the field of composite fiber preparation, in particular to a method for preparing an oriented shell-core structure superfine composite fiber. Background technique [0002] Electrospinning is a preparation technology of ultra-fine fibers (commonly known as nanofibers) with fiber fineness of submicron level by means of electric field force. Nanofibers prepared by electrospinning have the characteristics of high specific surface area and large aspect ratio, and have potential application prospects in the fields of food, filtration, functional textiles, catalysis, and biomedicine (especially in the construction of tissue engineering scaffolds). However, due to the uncontrollability of the electrospinning jet, the preparation of highly oriented ultrafine fibers has always been a research hotspot and difficulty in this field. In the past 10 years, extensive and in-depth studies have been made on the preparation of various polymer-ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/18D01F8/02D01F8/14D01D5/34D01D5/00
Inventor 张彦中袁卉华屠红斌赵仕芳李碧云
Owner DONGHUA UNIV
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