Method for coaxially printing quantum dot hydrogel optical fiber and application in multi-parameter sensing

Abstract

The invention discloses a method for coaxially printing a quantum dot hydrogel optical fiber and application in multi-parameter sensing The method comprises the following steps of a) weighing acrylamide, acrylic acid, a cross-linking agent, a photoinitiator and a plurality of quantum dots with specified fluorescence wavelengths according to specified mass, and performing uniform mixing in 100 mL of deionized water to prepare a hydrogel optical fiber core precursor solution; b) weighing acrylamide, acrylic acid, a cross-linking agent and a photoinitiator according to specified mass, and performing uniform mixing in 100 mL of deionized water to prepare a hydrogel optical fiber cladding precursor solution; c) injecting the hydrogel optical fiber core precursor solution prepared in the step a) into a conduit of a coaxial printing core material nozzle; d) injecting the hydrogel optical fiber cladding precursor solution prepared in the step b) into a conduit of a coaxial printing packing material nozzle; and e) in the printing process, performing light curing by using an ultraviolet lamp to manufacture the quantum dot hydrogel optical fiber. According to the invention, the defects in the prior art can be overcome.

Description

technical field [0001] The invention relates to the technical field of quantum dot flexible optical fibers, in particular to a method for coaxially printing quantum dot hydrogel optical fibers and multi-parameter sensing applications. Background technique [0002] Quantum dots (Quantum dots), also known as "artificial atoms", is a nano-scale semiconductor that binds excitons in three spatial directions. The frequency of light waves can be changed by changing the size of the semiconductor, so adjusting the size of the semiconductor can control its light-emitting frequency. At the same time, due to the wide and continuous absorption spectrum, narrow fluorescence spectrum, and strong resistance to photobleaching, quantum dots have become important indicators in fluorescence sensing. [0003] At present, there are mainly the following methods for the production of optical fiber fluorescence sensors based on quantum dots. The first is to prepare quantum dot optical fiber preform...

AI Technical Summary

Problems solved by technology

[0004] However, the first method involves high temperature, and the photoelectric properties of quantum dot materials will be affected; the second method has difficulties in perfusion, and the microstructure is fragile and expensive, which cannot meet the needs of practical applications.

However, the quantum dot optical fiber based on flexible materials is manufactured by using a mold to prepare a hydrogel optical waveguide with air as the cladding. The consistency of the hydrogel optical waveguide prepared by this method is difficult to ensure, and at the same time, the optical loss is large.

Images