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Preparation of a hydrogel-based smart fiber with tunable ambient temperature response

An ambient temperature, hydrogel technology, applied in the direction of conjugated synthetic polymer rayon, can solve the problems of easy dissociation, poor structural stability, high molecular weight requirements, and achieve the effect of improving structural stability

Active Publication Date: 2017-08-01
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 pH-responsive PAN hydrogel fibers is the entanglement of polymer chains. Not good, and the preparation process requires high molecular weight

Method used

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  • Preparation of a hydrogel-based smart fiber with tunable ambient temperature response
  • Preparation of a hydrogel-based smart fiber with tunable ambient temperature response
  • Preparation of a hydrogel-based smart fiber with tunable ambient temperature response

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 0.5g OMEGA and 0.5g MEO at room temperature 2 Prepare O:M=1:1 solution from MA, and weigh 0.1gOEGMA and 0.9gMEO 2 Prepare O:M=1:9 solution in MA, add 0.005g IRGACURE2959 respectively, and magnetically stir in the dark for 3h until IRGACURE2959 is completely dissolved, and prepare two kinds of POM with different O:M ratios by UV-induced free radical polymerization. Weigh 5g of distilled water at room temperature and add them to the two POMs, stir magnetically for 48 hours until the POMs are completely dissolved, then add 4g PEGDA and 0.02g IRGACURE2959 respectively, and magnetically stir for 3 hours in the dark until the IRGACURE2959 is completely dissolved, then let stand for 6 hours to remove air bubbles, and obtain two spinning solution. The two kinds of spinning liquids were respectively used as spinning nozzles with capillary tubes with an inner diameter of 0.6 mm and a length of 2 cm, and were passed into a deionized water bath by a propulsion pump at a prop...

Embodiment 2

[0038] Weigh 0.6gOEGMA and 1.4gMEO at room temperature 2 MA, 0.01g IRGACURE2959, magnetically stirred in the dark for 3h until IRGACURE2959 was completely dissolved, and POM was prepared by ultraviolet light-induced free radical polymerization. Weigh 5 g of distilled water into POM at room temperature, stir magnetically for 36 hours until POM is completely dissolved, then add 3 g of PEGDA and 0.015 g of IRGACURE2959, and magnetically stir for 3 hours in the dark until IRGACURE2959 is completely dissolved, then let it stand for 6 hours to remove air bubbles and obtain 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...

Embodiment 3

[0040] Weigh 1.25g OEGMA and 1.25g MEO at room temperature 2 MA, 0.0125g IRGACURE2959, magnetically stirred in the dark for 3h until IRGACURE2959 was completely dissolved, and POM was prepared by ultraviolet light-induced free radical polymerization. Weigh 5g of distilled water into POM at room temperature, stir magnetically for 24 hours until POM is completely dissolved, then add 2.5g PEGDA and 0.0125g IRGACURE2959, and magnetically stir for 3 hours in the dark until IRGACURE2959 is completely dissolved, then let it stand for 6 hours to remove air bubbles and obtain 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 t...

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Abstract

The invention relates to a preparation method for an adjustable hydrogel-based intelligent fiber responsive to environment temperature. The method comprises the following steps: at room temperature, mixing OEGMA with MEO2MA, adding a photoinitiator and carrying out stirring in the absence of light so as to obtain POM; at room temperature, adding distilled water into the prepared POM, then adding PEGDA and the photoinitiator after stirring, and then successively carrying out stirring in the absence of light, standing and removal of bubbles so as to obtain a spinning liquid; and at room temperature, introducing the prepared spinning liquid into a water bath through a metering pump, arranging an ultraviolet point light source, initiating free radical polymerization of PEGDA to obtain hydrogel nascent fiber with a semi-interpenetratingpolymernetwork (semi-IPN) structure and carrying out drafting so as to obtain the hydrogel-based intelligent fiber. The method provided by the invention realizes continuous preparation of the hydrogel fiber, improves structural stability of the fiber through the semi-interpenetrating network and prepares the adjustable hydrogel fiber responsive to temperature by adjusting the proportions of OEGMA and MEO2MA in the process of preparation.

Description

technical field [0001] The invention belongs to the field of preparation of environment-responsive intelligent fibers, in particular to a preparation method of hydrogel-based intelligent fibers with adjustable environmental temperature response. 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/36D01F8/10
Inventor 朱美芳侯恺林韵呤陈少华成艳华
Owner DONGHUA UNIV
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