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Preparation method of guar gum nanofiber

A technology of nanofibers and guar gum, which is applied in the field of preparation of guar gum nanofibers, can solve the problems of unsatisfactory chain entanglement, poor spinnability of guar gum, and low spinning efficiency, and achieve optimal chain entanglement degree, low price, and the effect of improving spinnability

Active Publication Date: 2021-07-02
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chain entanglement of guar gum itself is not ideal due to reasons such as molecular conformation, and its aqueous solution has a large surface tension, which results in poor spinnability of guar gum
The existing helical sheet type needle-free electrospinning device has low spinning capacity and spinning efficiency due to the helical rotary structure will inevitably produce more non-Taylor cone spinning areas, and the quality of the resulting yarn is also due to the edge effect of the electric field. Inferior disadvantages

Method used

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  • Preparation method of guar gum nanofiber
  • Preparation method of guar gum nanofiber
  • Preparation method of guar gum nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Mix dodecyldimethylbenzyl ammonium chloride cationic surfactant, guar gum and water in a weight ratio of 0.5:1.5:98, and let the guar gum swell at room temperature for 20 minutes; at room temperature and 300rpm , continue stirring for 8 hours to obtain solution A; use a high-speed centrifuge to degas solution A at 7000r / min for 30 minutes until the bubbles completely disappear, and obtain spinning stock solution B. The spinning dope B is spun and shaped by needle-based electrospinning or needle-free electrospinning to obtain guar gum nanofibers.

[0052] The spinning conditions of needle electrospinning are: static voltage 23.4kv, flow rate 1ml / h, receiving distance 15cm, temperature 35°C, humidity 10%.

[0053] The spinning conditions of the needle-free electrospinning are as follows: static voltage 30kv, rotation speed of the multi-pinion rod outlet 30r / min, receiving distance 15cm, temperature 35°C, humidity 20%.

[0054] figure 2 and image 3 The SEM images of g...

Embodiment 2

[0056] Mix hexadecyldimethylethylammonium bromide cationic surfactant, guar gum and water at a mass ratio of 0.3:2:97.7, and the swelling time is 20 minutes; keep stirring for 8 hours at room temperature and 300 rpm , to obtain solution A; use a high-speed centrifuge to degas solution A at 7000r / min for 30 minutes until the bubbles completely disappear, and obtain spinning stock solution B. The spinning dope B is spun and formed by needle spinning or needle-free electrospinning to obtain a guar gum nanofiber membrane.

[0057] 1) The process conditions of needle electrospinning are: electrostatic voltage 23.67kv, flow rate 2ml / h, receiving distance 15cm, temperature 35°C, humidity 10%.

[0058] 2) The process conditions of needle-free electrospinning are as follows: electrostatic voltage 30kv, rotation speed of the multi-rever wire outlet 30r / min, receiving distance 15cm, temperature 35°C, humidity 20%.

[0059] Figure 4 and Figure 5 The SEM images of guar gum nanofibers ...

Embodiment 3

[0061] Mix octadecyldimethylbenzyl ammonium chloride cationic surfactant, guar gum and water at a mass ratio of 0.5:1.5:98, and the swelling time is 20 minutes; at room temperature and 300 rpm, keep stirring for 8 hours , to obtain solution A; use a high-speed centrifuge to degas solution A at 7000r / min for 30 minutes until the bubbles completely disappear, and obtain spinning stock solution B. The spinning dope B is spun and formed by needle spinning or needle-free electrospinning to obtain a guar gum nanofiber membrane.

[0062] 1) The process conditions of electrospinning with needles are: static voltage 26.85kv, flow rate 2ml / h, receiving distance 15cm, temperature 35°C, humidity 10%.

[0063] 2) The process conditions of needle-free electrospinning are as follows: electrostatic voltage 30kv, rotation speed of the multi-rever wire outlet 30r / min, receiving distance 15cm, temperature 35°C, humidity 20%.

[0064] Figure 6 and Figure 7 The SEM images of guar gum nanofibe...

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Abstract

The invention discloses a preparation method of guar gum nanofiber. The method comprises a step of spinning a guar gum spinning solution through electrostatic spinning, wherein the guar gum spinning solution is prepared by mixing a cationic surfactant, guar gum and water according to the weight ratio of (0.1-0.5): (0.5-4): (90-99). By adding a proper amount of the cationic surfactant into the guar gum solution, the surface tension of the guar gum solution is regulated and controlled, the chain entanglement degree of the guar gum solution is optimized, and the conformation of the guar gum solution is improved, so that the spinnability of guar gum electrostatic spinning is improved. The invention further provides an improved needleless electrostatic spinning device. By means of the device, the spinning efficiency and spinning quality of the guar gum spinning solution can be improved. The guar gum nanofiber prepared by the method has the diameter of 100 nm or below, relatively high dispersion and relatively high strength and rebound resilience.

Description

technical field [0001] The invention belongs to the field of preparation of natural polymer materials, and relates to a preparation method of guar gum nanofibers. Background technique [0002] Guar gum, also known as guar gum, is a galactomannan extracted from guar beans. It has good water solubility and biocompatibility, and is generally used as a thickener in textile and pharmaceutical industries. Electrospun guar gum nanofibers can be applied to drug sustained-release and controlled-release carriers, tissue engineering scaffolds, trauma accessories, cigarette filters, home textiles, temperature-sensitive materials, smart materials, etc. [0003] Electrospinning is the only method that can directly and continuously prepare polymer nanofibers. It is simple and flexible. At present, there are two electrospinning methods, which are divided into needle electrospinning technology and needle-free electrospinning technology. The core of the needle electrospinning technology is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D1/02D01D1/10D01F9/00D01F1/10
CPCD01D5/0015D01D1/02D01D1/103D01D5/0069D01F9/00D01F1/10
Inventor 管福成张一航郭静徐奕张欣张森
Owner DALIAN POLYTECHNIC UNIVERSITY
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