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A kind of mechanical sensor based on hydrogel optical fiber and preparation method thereof

A technology of optical fiber mechanics and hydrogel, which is applied in the application of optical methods for fluid pressure measurement, fiber chemical characteristics, and measurement of the force of changes in optical properties of materials when they are stressed, and can solve the problem of inability to achieve large-scale continuous preparation , complex preparation methods and other issues, to achieve good biocompatibility, high sensitivity, and high application value

Active Publication Date: 2021-11-09
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a hydrogel-based optical fiber mechanical sensor and its preparation method, which overcomes the technical defects that the existing preparation method is complicated, limited by the template material, and unable to realize large-scale continuous preparation. The present invention includes Sodium alginate and acrylamide (AM) monomer solutions with different contents are used as the skin and core layer spinning solution, and the horizontal coaxial needle is used as the spinning nozzle; the CaCl 2 The aqueous solution is a coagulation bath to solidify sodium alginate in the spinning solution, and an ultraviolet light source is added to initiate the free radical polymerization of AM in the spinning solution; after drawing, a double-network hydrogel optical fiber with a skin-core structure is finally obtained, which has great application prospects

Method used

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  • A kind of mechanical sensor based on hydrogel optical fiber and preparation method thereof
  • A kind of mechanical sensor based on hydrogel optical fiber and preparation method thereof
  • A kind of mechanical sensor based on hydrogel optical fiber and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] Prepared at room temperature containing 2wt% sodium alginate (M W =400000), 40wt% acrylamide, 1.5wt‰N, N-methylenebisacrylamide, 5wt‰photoinitiator (IRGACURE500) aqueous solution is used as the core layer spinning solution, and the configuration contains 2wt% sodium alginate , 10wt% acrylamide, 1.5wt‰PEGDA (M W =10000), the aqueous solution of 5wt‰ photoinitiator (IRGACURE500) is used as the cortex spinning solution, and is stirred by magnetic force for 6 hours in the dark at room temperature to a uniform spinning solution. The spinning solution is extruded into a calcium chloride water bath (1.5wt.% by mass fraction) through a coaxial needle (with an outer diameter of 1.469mm and an inner diameter of 0.557mm) by a propulsion pump, and the extrusion rate of the cortex is 10.0ml / h, the extrusion rate of the core layer is 10.0 mL / h (the extrusion rate ratio of the skin-core layer is 1). The horizontal spinning nozzle is immersed 2cm below the surface of the water bath....

Embodiment 2

[0032] Prepared at room temperature containing 2wt% sodium alginate (M W =10000), 30wt% acrylamide, 1.5wt‰PEGDA (M W =575), the aqueous solution of 5wt‰ photoinitiator (IRGACURE70) is stand-by as core layer spinning solution, configuration contains the sodium alginate of 2wt%, 10wt% acrylamide, 1.5wt‰ crosslinking agent, 5wt‰ photoinitiator ( The aqueous solution of IRGACURE70) is used as the cortex spinning solution, and is magnetically stirred for 6 hours in the dark at room temperature to a uniform spinning solution.

[0033] The spinning solution is extruded into a calcium chloride water bath (mass fraction is 1.0wt.%) through a coaxial needle (the outer diameter is 1.469mm, and the inner diameter is 0.557mm) by a propulsion pump, and the extrusion rate of the cortex is 5.0ml / h, the extrusion rate of the core layer is 1.0 mL / h (the extrusion rate ratio of the skin-core layer is 5). The horizontal spinning nozzle is immersed 2cm below the surface of the water bath. Set an...

Embodiment 3

[0035] Prepared at room temperature containing 2wt% sodium alginate (M W =100000), 35wt% acrylamide, 1.5wt‰PEGDA (M W =20000), the aqueous solution of 5wt‰ photoinitiator (IRGACURE 2959) is stand-by as the core layer spinning solution, configuration contains 2wt% sodium alginate, 15wt% acrylamide, 1.5wt‰ crosslinking agent, 5wt‰ photoinitiator The aqueous solution of (IRGACURE 2959) is used as the skin spinning solution, and it is magnetically stirred at room temperature for 6 hours in the dark to obtain a uniform spinning solution.

[0036] The spinning solution is extruded into a calcium chloride water bath (1.5wt.% by mass fraction) through a coaxial needle (with an outer diameter of 1.469mm and an inner diameter of 0.557mm) by a propulsion pump, and the extrusion rate of the cortex is 2.0ml / h, the extrusion rate of the core layer is 8.0mL / h (the extrusion rate ratio of the skin-core layer is 0.25). The horizontal spinning nozzle is immersed 2cm below the surface of the ...

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Abstract

The invention relates to a hydrogel-based optical fiber mechanical sensor and its preparation method, comprising: extruding the core layer spinning solution and the cortex spinning solution into the water bath of the coagulation bath through a coaxial needle, and setting the spinning nozzle at the spinneret Curing by ultraviolet point light source, the obtained nascent hydrogel fiber is wound and collected after dynamic drawing. The hydrogel obtained by the invention has great application prospects in mechanical sensors, has the characteristics of large detection range, high sensitivity, and excellent biocompatibility properties.

Description

technical field [0001] The invention belongs to the field of double-network hydrogel and its preparation, in particular to a hydrogel-based optical fiber mechanical sensor and its preparation method. Background technique [0002] In recent years, hydrogel materials with excellent photoconductive properties have attracted attention and are widely used in photodynamic therapy, photothermal ablation, surgical treatment, and biosensors. In particular, the fibrous hydrogel material has precise orientation and high-efficiency transmission of optical signals and energy, and is especially suitable for preparing implantable hydrogel optical fiber devices. However, hydrogel fibers generally have low mechanical strength and low tensile strength at break, making it difficult to adapt to human body movements and internal organ displacement, which greatly limits their applications. At present, an effective road strength is to realize the high elasticity and toughness of hydrogel through ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/10D01F1/10D01D5/34D01D5/06D01D13/00C08F251/00C08F220/56G01L1/24G01L11/02
CPCC08F251/00D01D5/06D01D5/34D01D13/00D01F1/10D01F8/10G01L1/242G01L11/025C08F220/56
Inventor 朱美芳陈国印侯恺成艳华陈涛周展聂远凌
Owner DONGHUA UNIV
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