Microfluidic spinning device, linear core-shell structure conductive fiber and preparation method and application of linear core-shell structure conductive fiber

A technology of spinning device and core-shell structure, which is applied in the field of microfluidic spinning device, can solve the problems of simple and rough, lack of conductive properties of conductive materials, and inability to control the shape accurately, and achieve low cost and excellent photothermal shrinkage performance , the effect of excellent electrical conductivity

Inactive Publication Date: 2021-03-12
NANJING DRUM TOWER HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inherent two-dimensional structure of MXenes, the assembly of MXenes with one-dimensional hydrogel fibers still faces great challenges.
Moreover, most of the current preparation methods are too simple and crude to precisely control the morphology, resulting in the lack of conductive properties of the final conductive material.

Method used

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  • Microfluidic spinning device, linear core-shell structure conductive fiber and preparation method and application of linear core-shell structure conductive fiber
  • Microfluidic spinning device, linear core-shell structure conductive fiber and preparation method and application of linear core-shell structure conductive fiber
  • Microfluidic spinning device, linear core-shell structure conductive fiber and preparation method and application of linear core-shell structure conductive fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A linear core-shell structure MXene conductive fiber, comprising the steps of:

[0034] S1. Assemble the microfluidic spinning device: refer to figure 1 , assemble the internal phase capillary 1, the intermediate phase capillary 2, and the external phase capillary 4 with inner diameters of 100 μm, 250 μm, and 800 μm coaxially into the observation capillary 3, where necessary (the interface between the internal phase capillary 1 and the intermediate phase capillary 2, the middle The interface between the phase capillary 2 and the observation capillary 3, and the interface between the outer phase capillary 4 and the observation capillary 3) are encapsulated with transparent epoxy resin; then the inner phase capillary 1 is connected with the inner phase liquid inlet device 5 to form an inner phase fluid flow pipeline, and the middle The phase capillary 2 is connected with the intermediate phase liquid inlet device 6 to form an intermediate phase fluid flow channel, and the...

Embodiment 2

[0038] Example 2: Morphology Control of Conductive Fibers with Linear Core-Shell Structure

[0039] The microfluidic spinning device assembled in Example 1 was used to prepare the linear core-shell structure conductive fiber. During the preparation process, by adjusting the inner phase MXenes aqueous solution, or the intermediate phase Na-Alg / NIPAM aqueous solution, or the outer phase CaCl 2 The flow rate of the aqueous solution can observe the change of the wall thickness of the linear core-shell structure conductive fiber online, and realize the precise control of the shape of the linear core-shell structure conductive fiber, such as image 3 As shown, among them, image 3 a is external phase CaCl 2 The flow rate of the aqueous solution is fixed, and the wall thickness of the linear core-shell conductive fiber changes when the flow rate of the inner phase MXenes aqueous solution and the intermediate phase Na-Alg / NIPAM aqueous solution are adjusted; image 3 b is the flow r...

Embodiment 3

[0040] Example 3: Electrical performance test of linear core-shell conductive fiber

[0041] In Example 1 figure 2 The shown example is the linear core-shell structure conductive fiber prepared at different flow rates with MXene as the core and hydrogel as the shell. The resistance performance of the case is tested, and the corresponding resistance change value is calculated, such as Figure 4 shown;

[0042] Conductive fibers with linear core-shell structure with different core sizes are based on the same microfluidic spinning device, by adjusting the flow rate of the internal phase solution (adjusting the internal phase flow rate from 0.1 mL / h to 0.5 mL / h, maintaining the middle phase flow rate and external phase flow rates were 1.5mL / h and 10mL / h) to obtain linear core-shell conductive fibers with the same length and different inner diameters. Such as Figure 4 As shown in a, it is the relationship between the resistance of the linear core-shell structure conductive fi...

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Abstract

The invention discloses a microfluidic spinning device, a linear core-shell structure conductive fiber and a preparation method and application of the linear core-shell structure conductive fiber. Thepreparation method is based on a co-flow microfluidic spinning device, a shell layer solution and a core layer solution are correspondingly guided into an inner-phase capillary tube and an intermediate-phase capillary tube, a core-shell structure fiber precursor in a laminar flow state is obtained, and then the fiber precursor is rapidly cured by using an external-phase curing solution, so that the core-shell structure of the fiber is smoothly maintained; the wall thickness of the fiber is precisely adjusted by adjusting the flow velocity of each phase of the fiber, so that the morphology ofthe conductive fiber is regulated, and the preparation process is simple, low in cost and suitable for large-scale production; and according to the linear core-shell structure conductive fiber, an MXene aqueous solution is used as a core layer, a shrinkable alginate hydrogel material with good biocompatibility is used as a sheath layer, and the fiber has excellent conductive performance and photo-thermal shrinkage performance while a good core-shell structure is ensured, so that the linear core-shell structure conductive fiber is applied to a flexible electronic device which responds to external photo-thermal stimulation.

Description

technical field [0001] The invention relates to the technical field of biomaterials, in particular to a microfluidic spinning device, a linear conductive fiber with a core-shell structure and a preparation method and application thereof. Background technique [0002] In recent years, conductive hydrogels have been widely used in various aspects including pressure sensors, temperature sensors, supercapacitors, soft robots, etc., and are considered as the most promising materials for flexible electronic systems. Nowadays, various conductive elements have been combined with hydrogels and exhibit excellent electrical conductivity and mechanical properties. Among these conductive elements, MXene, as a two-dimensional early transition metal carbide / carbonitride newly discovered in 2011, has been widely used in two-dimensional Materials and even three-dimensional materials are assembled and applied to various biomedical engineering fields. However, due to the inherent two-dimensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/34D01F8/10D01F8/18
CPCD01D5/34D01F8/18D01F8/10
Inventor 赵远锦郭佳慧王健王月桐余筠如
Owner NANJING DRUM TOWER HOSPITAL
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