Preparation method for continuous micron-size polyethylene glycol diacrylate (PEGDA) hydrogel fiber

A hydrogel, micron-scale technology, applied in the direction of fiber chemical characteristics, spinning solution preparation, wet spinning method, etc., can solve the problems of easy dissociation, difficult to control the diameter, and continuous collection of hydrogel fibers, and achieve uniformity effect of diameter

Active Publication Date: 2015-12-16
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, Dr. Lin Xiuling of Harbin Institute of Technology used electrospinning to prepare PU / PNIPAAm electrospun fibers, but this method can only obtain non-woven films; foreign researchers based on microfluidic tubes The hydrogel fibers prepared by the microfluidic tubes cannot be collected continuously. The diameter is difficult to control; Professor Gu Lixia of Donghua University published in the "Journal of Functional Polymers" a two-step process of wet spinning after polymerization to prepare PVA / PAA hydrogel fibers, but due to the gel The three-dimensional network structure has been formed before spinning, so it cannot be stretched and collected continuously; in addition, the structure of some sodium alginate and PAN hydrogel fibers is essentially the entanglement of polymer chains, and this fiber is easily entangled in a special ionic environment. Dissociation, poor structural stability, and the preparation process requires high molecular weight

Method used

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  • Preparation method for continuous micron-size polyethylene glycol diacrylate (PEGDA) hydrogel fiber
  • Preparation method for continuous micron-size polyethylene glycol diacrylate (PEGDA) hydrogel fiber
  • Preparation method for continuous micron-size polyethylene glycol diacrylate (PEGDA) hydrogel fiber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 2 g of deionized water, 8 g of PEGDA (Mw=300), and 0.03 g of IRGACURE2959 at room temperature, and magnetically stir for 6 h in the dark at room temperature until IRGACURE2959 is completely dissolved to obtain a spinning solution. A capillary with an inner diameter of 0.6 mm and a length of 2 cm is used as a spinning nozzle, and a propulsion pump is used to pass the spinning solution into a deionized water bath at a propulsion rate of 2 ml / h, and the spinning nozzle is immersed in the water bath 0.5 cm below the liquid surface. Set a 90° ultraviolet point light source at a distance of 8 mm from the spinneret, with a wavelength of 400 mm, and a spot distance of 5 mm from the spinning solution. The linear speed of the roller with a diameter of 6 cm was set to 406.9 m / h, and the nascent hydrogel fibers were wound and collected to obtain continuous micron-sized hydrogel fibers.

[0030] figure 1 , figure 2 is the infrared spectrum of the PEGDA hydrogel, figure 2...

Embodiment 2

[0034] Weigh 6 g of deionized water, 4 g of PEGDA (Mw=500), and 0.012 g of IRGACURE2959 at room temperature, and magnetically stir for 6 h in the dark at room temperature until IRGACURE2959 is completely dissolved to prepare a spinning solution. Use deionized water as the coagulation bath, and a capillary with an inner diameter of 1.5 mm and a length of 2 cm as the spinning nozzle. The spinning solution is passed into the coagulation bath by a propulsion pump at a propulsion rate of 3 ml / h, and the spinning nozzle is immersed in the water bath 1.5 cm below the liquid surface. Set a 60° ultraviolet point light source at a distance of 7 mm from the spinneret, with a wavelength of 200 mm, and a spot distance of 1 cm from the spinning solution. The line speed of the roller with a diameter of 5 cm is set to 800 m / h, and the nascent hydrogel fibers are wound and collected to obtain continuous micron-sized hydrogel fibers.

Embodiment 3

[0036] Weigh 8 g of deionized water, 2 g of PEGDA (Mw=550), and 0.02 g of IRGACURE2959 at room temperature, and magnetically stir for 6 h in the dark at room temperature until IRGACURE2959 is completely dissolved to prepare a spinning solution. Using deionized water as the coagulation bath, a capillary with an inner diameter of 1.0 mm and a length of 2 cm as the spinning nozzle, the spinning liquid is passed into the coagulation bath by a propulsion pump at a propulsion rate of 10 ml / h, and the spinning nozzle is immersed 2 cm below the surface of the water bath. Set a 90° ultraviolet point light source at a distance of 5 mm from the spinneret, with a wavelength of 325 mm, and a spot distance of 8 mm from the spinning solution. The linear speed of the drum with a diameter of 8 cm was set to 508.7 m / h, and the nascent hydrogel fibers were wound and collected to obtain continuous micron-sized hydrogel fibers.

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Abstract

The invention relates to a preparation method for a continuous micron-size PEGDA hydrogel fiber. The method comprises the following steps: adding a photoinitiator into an aqueous solution of PEGDA and carrying out stirring in a dark place until the photoinitiator is completely dissolved so as to obtain a PEGDA spinning liquid; introducing the prepared spinning liquid into a water bath, arranging an ultraviolet point light source, initiating free radical polymerization of PEGDA in the spinning liquid to obtain PEGDA nascent hydrogel fiber; and carrying out drafting on obtained nascent hydrogel so as to obtain the continuous micron-size PEGDA hydrogel fiber. The PEGDA hydrogel fiber prepared in the invention is a micron size and has the advantages of continuousness, uniformity, controllable diameter, etc. The diameter of the hydrogel fiber can be controlled by adjusting monomer concentration, an extrusion rate, a winding rate, etc.

Description

technical field [0001] The invention belongs to the field of preparation of hydrogel fibers, in particular to a preparation method of continuous micron-sized PEGDA hydrogel fibers. Background technique [0002] Hydrogel is a kind of soft and wet material with three-dimensional network structure composed of organic polymers and water. It is widely used in drug delivery and release, tissue engineering scaffolds, smart sensors, pollutant adsorption, enzyme immobilization and other fields. Due to the wet and soft properties of hydrogels, people usually use self-assembly and template forming methods to process hydrogels into 0-dimensional (nano-microspheres) and 3-dimensional materials (bulk gels). The gel film materials on the market are also On the basis of 3D materials, it is still difficult to continuously prepare 1D (gel fiber) hydrogel materials obtained by reducing the thickness. [0003] According to the physicochemical properties of hydrogels, a series of preparation me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/16C08F122/20C08F2/48D01D5/06D01D1/02D01D7/00
Inventor 朱美芳侯恺夏梦阁汪慧怡孙宾
Owner DONGHUA UNIV
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