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Method for preparing modified konjac glucomannan fiber by electrostatic spinning

A technology of mannan and electrospinning, which is applied in the direction of spinning solution preparation, fiber treatment, filament/thread forming, etc., to achieve the effect of simple process, strong practicability and environmental friendliness

Inactive Publication Date: 2014-12-03
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there have been reports on electrospinning of natural polymers such as silk, collagen, chitosan, etc., but the method of electrospinning fibers with modified konjac glucomannan has not been reported yet.

Method used

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  • Method for preparing modified konjac glucomannan fiber by electrostatic spinning
  • Method for preparing modified konjac glucomannan fiber by electrostatic spinning
  • Method for preparing modified konjac glucomannan fiber by electrostatic spinning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing fiber by electrostatic spinning of modified konjac glucomannan, comprising the following steps:

[0025] a. To modify konjac glucomannan, disperse 40 parts of konjac glucomannan (parts by weight, grams, the same hereinafter) in 240 parts of 40% ethanol aqueous solution, add 3 parts of sodium hydroxide, and heat at 25°C Swell under conditions for 2 hours, stop the reaction, neutralize the reaction with hydrochloric acid, filter the sample, wash it with 30% ethanol aqueous solution several times, put the sample in a drying oven at 100°C and dry it to constant weight. That is, deacetylated konjac glucomannan.

[0026] Put distilled water, deacetylated konjac glucomannan, methyl acrylate, and initiator in a container with a stirring device in a ratio of 300:10:30:0.1 parts by weight, and stir at 60°C for 3 hours, Take out the obtained emulsion, add three times the volume of absolute ethanol to the emulsion to settle for 1 hour, filter and wash repeat...

Embodiment 2

[0030] A method for preparing fiber by electrostatic spinning of modified konjac glucomannan, comprising the following steps:

[0031] Step a is the same as Step a in Example 1, and the following Examples 3 to 15 are the same as Step a in Example 1.

[0032] b. The prepared modified konjac glucomannan is pulverized, and the modified konjac glucomannan and trifluoroacetic acid are weighed according to the mass volume ratio of 4:10, and the modified konjac glucomannan is pulverized and dissolved in three in fluoroacetic acid, stirred until completely dissolved, and placed in an ultrasonic oscillator for 2 minutes to obtain a 4% electrospinning solution.

[0033] c. After extracting the electrospinning solution obtained in step b with a syringe, fix it on the electrospinning device, adjust the voltage to 12kV, the distance between the spinneret and the collection screen is 10cm, and the flow rate of the spinning solution flowing out of the spinneret The spinning temperature was ...

Embodiment 3

[0035] A method for preparing fiber by electrostatic spinning of modified konjac glucomannan, comprising the following steps:

[0036] a step is the same as in Example 1.

[0037] B, the obtained modified konjac glucomannan is pulverized, and the modified konjac glucomannan and trifluoroacetic acid are weighed according to the mass volume ratio of 5:10, and the modified konjac glucomannan is pulverized and dissolved in three In fluoroacetic acid, stir until completely dissolved, place in an ultrasonic oscillator and sonicate for 1 minute to obtain a 5% electrospinning solution.

[0038] c. After extracting the electrospinning solution obtained in step b with a syringe, fix it on the electrospinning device, adjust the voltage to 15kV, the distance between the spinneret and the collection screen is 12cm, and the flow rate of the spinning solution flowing out of the spinneret The spinning temperature was 1 mL / h, and the spinning ambient temperature was 20° C. After the electrosp...

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Abstract

The invention discloses a method for preparing modified konjac glucomannan fiber by electrostatic spinning. The method is characterized by comprising the following steps of: modifying konjac glucomannan, i.e., dissolving the konjac glucomannan in ethanol water solution, carrying out swelling reaction by adding sodium hydroxide, neutralizing by diluted hydrochloric acid, filtering, washing, and drying to obtain acetyl-free konjac glucomannan; mixing and reacting distilled water, acetyl-free konjac glucomannan, methyl acrylate and initiator under the temperature of 10-70DEG C, mixing by adding ethanol, standing for settling, filtering, washing solid with acetone, and drying to obtain modified konjac glucomannan; preparing spinning solution; and carrying out electrostatic spinning to prepare fiber. The method has the characteristics of simple technology, low cost and the like, and is environment-friendly, and the prepared fiber material has good application prospect in the fields of medicine, environmental protection, chemical industry, agriculture and the like.

Description

technical field [0001] The invention belongs to the field of biomass resource utilization and ultrafine fiber preparation methods, and relates to a method for preparing modified konjac glucomannan fibers by electrospinning. The prepared modified konjac glucomannan fiber material is suitable for biological tissue scaffolds, air filtration, wound dressings, wastewater treatment and other fields. Background technique [0002] Konjac tubers are rich in konjac glucomannan (hereinafter referred to as KGM), which is another abundant renewable natural polymer resource after starch and cellulose. Because of its biodegradability, high molecular weight, and gelatinization characteristics, it has large-scale applications in the fields of food, medicine, health care, environmental protection, chemical industry, and oil drilling. KGM products can be degraded by natural microorganisms after being discarded, and are environmentally friendly materials. [0003] Polymers capable of electros...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/36D01D5/00D01D1/02C08F251/00
Inventor 林晓艳李莹罗学刚陈哲
Owner SOUTHWEAT UNIV OF SCI & TECH
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