Method for improving mechanical properties of hydrogel fibers by secondary crosslinking
A secondary cross-linking, hydrogel technology, applied in the chemical characteristics of fibers, wet spinning, chemical post-processing of synthetic polymer rayon filaments, etc., can solve the problems of continuous preparation of hydrogel fibers, poor mechanical properties, Low cross-linking degree and other problems, to achieve the effect of low production cost, improved tensile and compressive properties, and good biocompatibility
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[0024] Example 1
[0025] A method for secondary crosslinking to improve the mechanical properties of hydrogel fibers, the specific steps are:
[0026] (1) Weigh 5g of deionized water, 3g of polyethylene glycol diacrylate (PEGDA, Mn=300), 0.05g of IRGACURE 2959 at room temperature, and magnetically stir at room temperature for 7 hours until IRGACURE 2959 is completely dissolved to obtain a spinning solution;
[0027] (2) Inject the spinning solution into a 10ml syringe, use a capillary with an inner diameter of 0.6mm and a length of 2cm as the spinning nozzle, and use a metering pump to inject the spinning solution from the syringe into the ionized water bath through the spinning nozzle at a advance rate of 2.5ml / h, the spinning nozzle is immersed 0.5cm below the surface of the water bath. Set a 90° ultraviolet point light source at a distance of 6mm from the spinneret, a wavelength of 400m, and a roller with a diameter of 6cm at a linear speed of 350m / h. The nascent hydrogel fiber...
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[0029] Example 2
[0030] A method for secondary crosslinking to improve the mechanical properties of hydrogel fibers, the specific steps are:
[0031] (1) Weigh 10g deionized water, 7g PEGDA (Mn=500), 0.03g IRGACURE 2959 at room temperature, and magnetically stir for 7h at room temperature in the dark until IRGACURE 2959 is completely dissolved to obtain spinning solution;
[0032] (2) Inject the spinning solution into a 10ml syringe. Use a capillary with an inner diameter of 0.6mm and a length of 2cm as the spinning nozzle. Use a metering pump to inject the spinning solution from the syringe into the ionized water bath through the spinning nozzle. The advance rate is 4ml / h, the spinning nozzle is immersed 0.5cm below the surface of the water bath. Set a 90° ultraviolet point light source at a distance of 6mm from the spinneret with a wavelength of 400nm and a roller with a diameter of 6cm at a linear speed of 400m / h. The nascent hydrogel fibers are wound and collected to obtain c...
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[0034] Example 3
[0035] A method for secondary crosslinking to improve the mechanical properties of hydrogel fibers, the specific steps are:
[0036] (1) Weigh 10g of deionized water, 7g of polypropylene glycol diacrylate (PPGDA, Mn=600), 0.03g of IRGACURE 2959 at room temperature, and magnetically stir at room temperature for 7 hours until IRGACURE 2959 is completely dissolved to obtain a spinning solution;
[0037] (2) Inject the spinning solution into a 10ml syringe. Use a capillary with an inner diameter of 0.6mm and a length of 2cm as the spinning nozzle. Use a metering pump to inject the spinning solution from the syringe into the ionized water bath through the spinning nozzle. The advance rate is 4ml / h, the spinning nozzle is immersed 0.5cm below the surface of the water bath. Set a 90° ultraviolet point light source at a distance of 6mm from the spinneret with a wavelength of 400nm and a roller with a diameter of 6cm at a linear speed of 400m / h. The nascent hydrogel fiber...
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