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Method for preparing polylactic acid, polyvinyl alcohol and brazilwood mixed nano or micron fibrous membrane

A technology of polyvinyl alcohol and micron fibers, which is applied in the preparation of micron fiber membranes and in the field of functional nanometers, can solve the problems of poor hygroscopicity and achieve good hygroscopicity and biocompatibility

Inactive Publication Date: 2008-08-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared polylactic acid, polyvinyl alcohol and hematoxylin blended nanofiber membrane not only significantly improved the disadvantage of poor hygroscopicity of the single polylactic acid fiber membrane, but also combined the medical value of the traditional Chinese medicinal material hematoxylin with good biocompatibility and biocompatibility. Combining the advantages of degraded nano and micro fiber membranes, endowing fiber membranes with new functions will have broad application prospects in the fields of medical care and nursing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Preparation of polylactic acid, polyvinyl alcohol and sumac blended nanofiber membrane

[0020] The Chinese herbal medicine hematoxylin was crushed, added 30 times deionized water, extracted at 90°C for 3 hours, and then filtered through a 280-mesh stainless steel sieve. Continue to add 20 times of deionized water to the slag, extract at 90°C for 2 hours, filter through a 280-mesh stainless steel sieve, and combine the hematoxylin extracts extracted twice. Using a rotary evaporator, reduce the pressure to 30kPa, and concentrate the hematoxylin solution to the total volume of the hematoxylin solution. After adding 75% to 85% of the total volume of the hematoxylin concentrate, alcohol with a purity of more than 90% was placed for 12 hours, and after separation by a centrifuge with a rotating speed of 2000r / min, the alcohol in the supernatant was evaporated and recovered. The remaining hematoxylin solution was spray-dried at 170° C. to obtain red-purple hem...

Embodiment 2

[0023] Embodiment 2: Preparation of polylactic acid, polyvinyl alcohol and sumac blended micron fiber membrane

[0024] The preparation method of red-purple hematoxylin powder is the same as in Example 1.

[0025] The blending solution configuration method is the same as in Example 1, except that the polylactic acid solution with a concentration of 16% (w / v) and the polyvinyl alcohol solution with a concentration of 12% (w / v) are mixed in a volume of 1:1 Finally, 2% (w / v) red-purple hematoxylin powder was added.

[0026] Put the configured blend solution into the syringe of the electrospinning device, and perform electrospinning. The electrospinning conditions are: spinning voltage 18kv, extrusion rate 1.0mL / h, receiving distance 10cm, and the micron-sized blended fiber membrane is spun.

Embodiment 3

[0027] Embodiment 3: Preparation of polylactic acid, polyvinyl alcohol and sumac blended nanofiber membrane

[0028] The preparation method of red-purple hematoxylin powder is the same as in Example 1.

[0029] The blending solution configuration method is the same as in Example 1, except that the polylactic acid solution with a concentration of 12% (w / v) and the polyvinyl alcohol solution with a concentration of 10% (w / v) are mixed in a volume of 1:1 Finally, 1% (w / v) red-purple hematoxylin powder was added.

[0030] Put the configured blend solution into the syringe of the electrospinning device, and perform electrospinning. The electrospinning conditions are: spinning voltage 14kv, extrusion rate 0.5mL / h, receiving distance 12cm, and nano-scale blended fiber membrane is spun.

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Abstract

The invention adds Chinese medicine logwood powder with multiple medicinal effects into the mixture of polylactic acid PLLA and polyvinyl alcohol PVA, and uses static spinning method to prepare functional nanometer and micrometer fiber membrane, wherein the logwood powder is prepared by using traditional Chinese medicine logwood powder as raw material, via water extraction, filtering, concentration, alcohol deposition, purifying, centrifugal separation, atomization and drying, as violet logwood powder. The blended solution of polylactic acid, polyvinyl alcohol and logwood is prepared by mixing 8-16% (w / v) polylactic acid demasorb solution and 6-12% (w / v) polyvinyl alcohol demasorb solution and adding 0.2-2% (w / v) logwood powder. The blended solution static spinning conditions comprise the spinning voltage of 10-20kv, the extruded amount of 0.1-1.5mL / h and the receive distance of 10-20cm. The inventive blended fiber membrane has better biological compatibility, biological degradable property, better absorbent quality and the functions of promoting blood circulation and removing blood stasis, diminishing the inflammation and reducing the pain and antiphlogistic, with wide application in medical treatment and nursing or the like.

Description

technical field [0001] The invention relates to a preparation method of functional nanometer and micrometer fiber membranes, in particular to a preparation method of polylactic acid, polyvinyl alcohol and hematoxylin blended nanometer or micrometer fiber membranes. Background technique [0002] In recent years, the preparation of polymer nanofibers has attracted great attention, because when the fiber diameter is reduced to the range of 1-100nm, polymer materials will show several amazing properties, such as large specific surface area, flexibility and ultra- These excellent properties make nanofibers have many important uses. At present, electrospinning technology is the simplest and most feasible method to prepare various polymer nanofibers. It uses electrostatic force to pull polymer solutions or melts to form nanoscale fibers. Electrospun fibers have been applied or can be potentially applied to fiber-reinforced composite materials, membranes, bioreactors, electrical, o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L67/04C08K11/00D01F8/14D01F8/10D01F1/10D01D5/00A61K9/70A61K47/30A61L15/22A61L15/44
Inventor 侯秀良魏取福刘亚吴宁
Owner JIANGNAN UNIV
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