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Preparation method of a smart hydrogel fiber with dual temperature response

A hydrogel fiber, temperature-responsive technology

Active Publication Date: 2017-06-06
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, Dr. Lin Xiuling from Harbin Institute of Technology used electrospinning to prepare temperature-responsive PU / PNIPAAm electrospun fibers, but this method can only obtain non-woven films, and the environmental responsiveness of PNIPAAm is irreversible; Donghua Professor Gu Lixia of the University and others 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 three-dimensional network structure of the gel It has been formed before, so it cannot be stretched and collected continuously; in addition, the structural essence of the PAN hydrogel fiber with pH correspondence is the entanglement of polymer chains. Not good, and the preparation process requires high molecular weight

Method used

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  • Preparation method of a smart hydrogel fiber with dual temperature response
  • Preparation method of a smart hydrogel fiber with dual temperature response
  • Preparation method of a smart hydrogel fiber with dual temperature response

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 0.2g OEGMA and 0.2g MEO at room temperature 2 MA, 0.003g IRGACURE 2959, protected from light. Stir with a magnetic stirrer at a speed of 1000r / min for 3h until the IRGACURE 2959 is completely dissolved, and initiate in-situ free radical polymerization under ultraviolet light with a wavelength of 200nm. Weigh 4.75 g of distilled water and 0.6 PEGDA into POM at room temperature, and stir magnetically for 12 hours until POM and PEGDA are completely dissolved in water. Then add 0.25g of clay and 0.003g of IRGACURE 2959, stir magnetically for 24 hours at room temperature in the dark, until the clay and photoinitiator are completely dissolved, and then let it stand for 6 hours to remove air bubbles, and obtain a spinning stock solution, PEGDA accounts for 10% of the total system mass. 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...

Embodiment 2

[0042] Weigh 0.1g OEGMA and 0.5g MEO at room temperature 2 MA, 0.006g IRGACURE 2959, protected from light, stirred with a magnetic stirrer at a speed of 500r / min for 3h until the IRGACURE 2959 was completely dissolved, and initiated in-situ free radical polymerization under ultraviolet light with a wavelength of 300nm. Weigh 2.4 g of distilled water and 0.18 g of PEGDA into POM at room temperature, and stir magnetically for 12 hours until POM and PEGDA are completely dissolved in water. Then add 0.353g of clay and 0.0018g of IRGACURE 2959, stir magnetically at room temperature for 24 hours in the dark, until the clay and the photoinitiator are completely dissolved, and then let stand for 6 hours to remove air bubbles, and obtain the spinning stock 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 ...

Embodiment 3

[0044] Weigh 0.1g OEGMA and 0.9g MEO at room temperature 2 MA, 0.007g IRGACURE 2959, protected from light. Stir with a magnetic stirrer at a speed of 800r / min for 3h until the IRGACURE 2959 is completely dissolved, and initiate in-situ free radical polymerization under ultraviolet light with a wavelength of 400nm. Weigh 10 g of distilled water and 1.5 g of PEGDA into the POM at room temperature, and stir magnetically for 12 hours until the POM and PEGDA are completely dissolved in the water. Then add 0.387g of clay and 0.0105g of IRGACURE 2959, stir magnetically at room temperature for 24 hours in the dark, until the clay and the photoinitiator are completely dissolved, and then let stand for 6 hours to remove air bubbles, and obtain the spinning stock 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...

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Abstract

The invention relates to a preparing method for intelligent hydrogel fibers with double responses to temperature. The preparing method comprises the steps that OEGMA and MEO2MA are mixed, photoinitiator is added, the mixture is stirred in the mode of being away from light, and in-situ free radical polymerization is carried out on the mixture to obtain POM; distilled water is added to the POM, PEGDA is added, and the mixture is stirred to obtain a mixed water solution; clay Laponite XLS is added into the obtained mixed water solution, photoinitiator is added, the mixture is stirred in the mode of being away from the light and stands, and bubbles are removed, so that a spinning solution is obtained; the spinning solution is introduced into a water bath, an ultraviolet-light point light source is arranged, and free radical polymerization is carried out to obtain hydrogel nascent fibers; the nascent fibers are drafted to obtain the hydrogel fibers. According to the obtained hydrogel fibers, the hydrogel fibers can be prepared continuously, the structural stability of the fibers is improved by means of a semi-interpenetrating network, the multiple responses of the fibers to the environment temperature can be achieved, and the preparing method has great significance in application and development of hydrogel materials and processing of the hydrogel materials at the later stage.

Description

technical field [0001] The invention belongs to the field of preparation of hydrogel fibers, in particular to a preparation method of intelligent hydrogel fibers with dual temperature responses. Background technique [0002] Smart hydrogel is a kind of soft and wet material with a three-dimensional network structure composed of responsive polymers and water. It is responsive to external pH, temperature, electric field and other stimuli. It is an important class of smart materials. , environmental energy and other fields have broad application prospects. However, due to the limitations of the soft-wet properties of hydrogels, usually they can only be processed into 3D materials (bulgogels) by in-situ polymerization, which greatly limits their applications. The preparation of continuous 1D (gel fiber) responsive hydrogel materials is of great significance for enriching the applications of smart hydrogels. [0003] According to the physicochemical properties of hydrogels, a s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/10D01F1/10C08F220/28C08F222/20
Inventor 朱美芳侯恺林韵吟周哲陈文萍
Owner DONGHUA UNIV
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