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Method for preparing multiphase fiber based on microfluidic-electrostatic spinning technology

An electrospinning technology and microfluidic technology, applied in the direction of nanotechnology, fiber treatment, nanotechnology, etc. for materials and surface science, can solve the problems of difficult preparation of multi-phase micro-nano fibers, and achieve easy structure adjustment, Low cost and simple preparation

Inactive Publication Date: 2021-09-07
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only simply adjust the structure of the fiber, and it is difficult to prepare heterogeneous micro-nano fibers with more complex structures.

Method used

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  • Method for preparing multiphase fiber based on microfluidic-electrostatic spinning technology
  • Method for preparing multiphase fiber based on microfluidic-electrostatic spinning technology
  • Method for preparing multiphase fiber based on microfluidic-electrostatic spinning technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1 Preparation of discrete structured multi-phase micro-nano fibers based on PDMS microfluidic chip.

[0042] This example provides a method for preparing a discrete-type intelligent constant-temperature multi-phase micro-nano fiber:

[0043] As a non-toxic and harmless phase change material, n-hexadecane is widely used in various engineering fields. In this embodiment, by encapsulating n-hexadecane in PVA nanofibers, the problem of leakage of n-hexadecane when it is transformed into a liquid state is solved.

[0044]First, sodium dodecyl sulfate (SDS) was added to deionized water at a rate of 1mg / ml as a solvent at room temperature, and then polyvinyl alcohol (PVA) was added to the solvent to prepare PVA solutions with mass fractions of 10wt% and 6wt%. , and then stirred with an electromagnetic stirrer for 24 hours under the condition of heating in a water bath at 70° C., and after it was fully dissolved, an external phase solution was obtained for future use. ...

Embodiment 2

[0048] Example 2 Preparation of continuous structured multi-phase micro-nano fibers based on glass tube microfluidic chip.

[0049] This example provides a continuous structure intelligent constant temperature multi-phase micro-nano fiber preparation method:

[0050] As a non-toxic and harmless phase change material, trimethylolethane is widely used in various engineering fields. In this example, by encapsulating 1,1,1-trimethylolethane in polycaprolactone (PCL) nanofibers, the problem of trimethylolethane leakage when it turns into a liquid state is solved.

[0051] First, 1 g of PCL was added to 9 g of dimethyl carbonate (DMC) at room temperature to prepare a 10 wt % PCL solution. Then stir with an electromagnetic stirrer for 24 hours under the condition of heating in a water bath at 50°C. After it is fully dissolved, the external phase solution is obtained for use, and coumarin 6 is added as a fluorescent indicator. At room temperature, 5 g of trimethylolethane was added ...

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Abstract

The invention relates to and discloses a method for preparing a multiphase fiber based on a microfluidic-electrostatic spinning technology. A microfluidic chip is placed under a high-speed microscope, an external phase solution and an internal phase solution respectively enter the microfluidic chip at different flow speeds through an injection pump, and a multi-phase spinning solution is formed after the microfluidic chip regulates and controls the external phase solution and the internal phase solution; different flowing states are formed in a micro-channel structure by regulating and controlling the flowing speed of each phase solution; the multi-phase spinning solution regulated and controlled by the microfluidic chip is enabled to have static electricity by utilizing a high-voltage power supply, and charged jet flow is formed at an outlet of the microfluidic chip; and along with the movement of the jet flow in the electric field, the solvent in the multi-phase spinning solution is gradually volatilized, and the jet flow is gradually solidified to form the multi-phase nanofibers. The microfluidic chip is easy to prepare and low in cost, the microfluidic chip is used as a control module of the multiphase spinning solution, modularization of the whole system can be achieved, the structure of the microfluidic chip is easy to adjust, and microfluidic chips of different structures can be prepared according to different multiphase fibers.

Description

technical field [0001] The invention relates to the fields of microfluidics, multiphase flow, and electrospinning, and specifically relates to the organic combination of microfluidic chip technology and electrospinning technology, and the control of multiphase micro-nano fibers by manipulating the flow state of the internal and external phase solutions. Components and methods of structure. Background technique [0002] Multiphase micro-nanofibers usually refer to fiber materials whose diameters range from nanometers to micrometers, are composed of heterogeneity and have phase interfaces. Compared with traditional single-phase nanofibers, multiphase micro-nanofibers have high specific surface area and easy structure. In addition to the common characteristics of nanofibers such as fixation, by virtue of the organic coordination between each phase, it can meet more complex application requirements. For example, by encapsulating phase-change materials in a core-sheath multiphas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D5/28D01F6/50D01F6/92D01F1/10B82Y40/00B82Y30/00
CPCD01D5/0061D01D5/28D01F6/50D01F6/92D01F1/10B82Y40/00B82Y30/00
Inventor 周江维陈然包福兵
Owner CHINA JILIANG UNIV
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