Coaxial composite continuous nano/micron fiber and its preparation method

A technology of micron fibers and fibers, which is applied in the field of coaxial composite continuous nano/micron fibers and their preparation, achieves the effects of broad market application, easy functionalization, considerable economic and social benefits

Inactive Publication Date: 2004-10-20
黄争鸣 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Up to now, there has been no method for preparing continuous coaxia...

Method used

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  • Coaxial composite continuous nano/micron fiber and its preparation method

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Effect test

Embodiment 1

[0022] A certain amount of Mefoxin (Mefoxin, a kind of antibiotic and anti-infection drug) is dissolved in a dichloromethane solution of amorphous polylactic acid (PDLA, molecular weight 100,000) at a concentration of 5% w / v, so that the weight percentage is 1%. The polylactic acid solution containing methexin will be used as the internal spinning solution. A solution of polycaprolactone dichloromethane-dimethylformamide (by weight ratio of 75:25) with a weight concentration of 13% and a molecular weight of 80,000 was used as the outer spinning solution. The inner diameter of the inner liquid injection needle is 0.3mm, and the outer diameter is 0.6mm; the inner diameter of the outer liquid injection needle is 0.8mm, and the outer diameter is 1.2mm. The applied voltage was 18 kV. The two are coaxially co-spun on the grounded aluminum foil paper to obtain a nano-micron compress with controlled and continuous antibacterial effect.

Embodiment 2

[0024] Accurately weigh a certain amount of gelatin (Gelatin, type A), a derivative of natural macromolecular collagen, stir and dissolve it in a trifluoroethanol (2,2,2-Trifluoroethanol, TFE) organic solvent to obtain a concentration of 5%w A / v Gelatin / TFE solution was used as the surface layer material; and 10% w / v polycaprolactone (Polycaprolacton, PCL) / TFE solution was used as the core material. Coaxial co-spinning of the two (spinning conditions: electric field strength 0.7KV / cm, distance between spinneret and receiving plate 15cm, environmental conditions: temperature 20°C, relative humidity: 75%, needle diameter as above), can get Monofilament horizontal surface modified ultrafine nano / micro fibers. Cell culture experiments showed that, compared with electrospun non-hydrophilic polycaprolactone nano / microfibers without surface functionalization, the surface functionalized polycaprolactone nano / microfiber membranes at the monofilament level had good cell affinity. harmo...

Embodiment 3

[0026]Single-walled carbon nanotubes (SWNTs) were dispersed in water under ultrasonic conditions using sodium dodecyl sulfate (SDS) as a dispersant. After component optimization, 0.35wt% single-walled carbon nanotubes were uniformly dispersed in 1wt% sodium lauryl sulfate aqueous solution (used as spinning liquid). Polyvinyl alcohol (PVA) with a molecular weight of 120,000 and a degree of hydrolysis of 99% was dissolved in deionized water at 80° C. to prepare a 10 wt % polyvinyl alcohol solution (as an external spinning solution). Then the two are coaxially co-spun (25 kV high voltage, the needle diameter is the same as above, and the spacing is 10 cm), and the nanocomposite fiber containing carbon nanotubes is obtained, which improves the mechanical and electrical properties of the fiber.

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Abstract

A coaxially composite continuous nano/micron fibre material is composed of core and surface layer, which are coaxial. Its preparing process includes such steps as respectively dissolving core material and surface layer material, loading them respectively in coaxial two containers with fine spray tube at lower end, respectively applying high-voltage DC electric field to them for driving them to be sprayed out via respective spray tubes to become coaxial composite fibre, and collected by a grounded collector.

Description

technical field [0001] The invention relates to a nano / micron material, in particular to a coaxial composite continuous nano / micron fiber and a preparation method thereof. Background technique [0002] Combining two materials coaxially instead of mixing into one rod or wire can meet many needs in industrial materials or in daily life. The most typical is a pencil, the surface layer and the core are two different materials coaxially composited into a rod. When the diameter of the coaxial composite rod reaches the order of several microns or less, its application fields are very wide. [0003] Although there are many mature processes for the preparation of large-scale coaxial composite rod wires (such as pencils), such processes are not suitable for the preparation of ultrafine (several microns to sub-micron) coaxial composite fibers . The diameters of fibers obtained by spinning techniques in the conventional textile industry, such as dry or wet spinning, are generally abo...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01F8/00
Inventor 黄争鸣张彦中
Owner 黄争鸣
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