Spiral fiber wrapped with perovskite quantum dots, and preparation method and device

A helical fiber and perovskite technology, applied in fiber processing, fiber chemical characteristics, chemical instruments and methods, etc., can solve the problems of strict material selection and environmental requirements, poor stability of perovskite quantum dots, and easy oxidation. , to achieve the effect of strong experimental repeatability, low cost and stable morphology

Inactive Publication Date: 2021-06-25
NANJING DRUM TOWER HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been many successful cases, these preparation methods are not only strict in material selection and environmental requirements, but the prepared perovskite quantum dots still face poor stability, easy oxidation, and easy deactivation in aqueous solution.

Method used

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  • Spiral fiber wrapped with perovskite quantum dots, and preparation method and device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The present invention provides a method for preparing a helical fiber wrapped with perovskite quantum dots, prepared by a microfluidic method, comprising the following steps:

[0034] S1. Build a microfluidic device

[0035] Take several capillary tubes and prepare a group of capillary array, reaction tube, dispersion tube and external phase tube, connect the capillary array to one end of the reaction tube, and nest it in the reaction tube; the other end of the reaction tube is connected to one end of the dispersion tube, and Nested in the dispersing tube; the other end of the dispersing tube is nested in the external phase tube, and the microfluidic device is built;

[0036] S2. Preparation of helical fibers wrapped with perovskite quantum dots

[0037]Pump different perovskite quantum dot precursors into each channel of the capillary array, pump the continuous phase solution into the dispersion tube, and pump the external phase solution into the external phase tube; ...

Embodiment 1

[0044] refer to figure 1 , the present embodiment provides a device for preparing helical fibers wrapped with perovskite quantum dots, including a capillary array 9, a reaction tube 10, a dispersion tube 11, an external phase tube 12, and a liquid-feeding power device; the capillary array 9 consists of seven The liquid outlet end of the capillary array 9 (the port is pointed) is connected and nested in the liquid inlet end of the reaction tube 10, and the liquid outlet end of the reaction tube 10 (the port is pointed) is connected and nested. Set on the liquid inlet end of the dispersing pipe 11, the liquid outlet end of the dispersing pipe 11 (the port is pointed) is connected and nested in the liquid inlet end of the external phase pipe 12; the number of the liquid inlet power devices is eight, and the inlet The hydraulic power device includes a liquid inlet pump and a syringe connecting needle, the liquid inlet pump is connected with the syringe connecting needle through a ...

Embodiment 2

[0052] The device provided in this example for preparing helical fibers wrapped with perovskite quantum dots is the same as that in Example 1.

[0053] The preparation method of the helical fiber wrapped perovskite quantum dots in this embodiment is as follows:

[0054] S1. Build a microfluidic device

[0055] Referring to Example 1

[0056] S2. Preparation of helical fibers wrapped with perovskite quantum dots

[0057] Push the cesium bromide solution to one liquid inlet in the capillary array 9 by the second liquid inlet power device 2, push the lead bromide solution to another liquid inlet in the capillary array 9 by the fifth liquid inlet power device 5 Make the two kinds of solutions flow out from the liquid outlet of the capillary array 9, and flow into the reaction tube 10 to mix and react; push the polyvinylidene fluoride solution in the dispersion tube 11 through the seventh liquid inlet power device 7; The eight-inlet power device 8 injects deionized water into th...

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Abstract

The invention provides a spiral fiber wrapped with perovskite quantum dots, and a preparation method and device. The outside of the perovskite quantum dot fiber is a polymer fiber, and the inside of the perovskite quantum dot fiber is wrapped with the perovskite quantum dots. The preparation method comprises the following steps of: based on the hydrodynamic effect, designing a micro-fluidic device by utilizing the characteristics that perovskite quantum dots are separated out by solvent volatilization after reaction of a perovskite quantum dot precursor solution and a polymer solution is subjected to rapid phase inversion, and generating a spiral polymer fiber internally wrapped with the perovskite quantum dots. The flow velocity of each phase of fluid can be adjusted, the fluorescence wavelength of the fiber can be controlled, and fibers with different fluorescence, different diameters and different spiral sizes can be generated. The preparation method is simple to operate, low in cost and high in experiment repeatability, a perovskite quantum dot composite material can be generated under a low environment requirement, and the prepared fiber has the three-dimensional spiral morphology, is uniform in structure and controllable in size, can serve as a light-emitting material and is wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a helical fiber wrapped with perovskite quantum dots, a preparation method and a device. Background technique [0002] As a very common shape in nature, the spiral structure can release more surface area in a relatively limited space, and can realize the maximum utilization of space. Helical fibers have been widely used in many fields, including microelectronics, catalytic reaction, biosensing, etc., so helical fibers have received extensive attention. [0003] Perovskite is a new type of inorganic non-metallic material with unique physical and chemical properties. Compounds with perovskite structure can be applied due to their stable crystal structure, unique electromagnetic properties and high redox and electrocatalytic activities. It has great development potential in the fields of physics, chemistry, energy and materials in many fields such as solid fuel ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/66D01D5/00D01D13/00D01F1/10D01F6/12
CPCC09K11/025C09K11/664C09K11/665D01D5/00D01D13/00D01F1/10D01F6/12
Inventor 赵远锦余筠如郭佳慧王月桐池俊杰商珞然
Owner NANJING DRUM TOWER HOSPITAL
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