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Method for preparing fiber with thermal insulation function based on microfluidic technology

A technology of microfluidic technology and a microfluidic device, which is applied in the field of preparing fibers with heat preservation function based on microfluidic technology, can solve the problems of single fiber function, complicated silk forming process, and single function, and achieve high-efficiency heat transfer, The effect of good biocompatibility and simple operation steps

Active Publication Date: 2019-07-16
绍兴钠钇光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the existing spinning process and the defect of single fiber function, the present invention proposes a method for preparing fibers with heat preservation function based on microfluidic technology. This method is simple and easy, and can produce fibers with nodes with specific functions. Moreover, the size of the nodes is uniform and the position spacing is controllable, which solves the disadvantages of simple structure and single function of the fiber obtained by the common spinning process, and the silk forming process is relatively complicated, and the pollution is relatively large. This technology will have great potential in the fields of industrial spinning and clothing. Wide range of application prospects

Method used

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  • Method for preparing fiber with thermal insulation function based on microfluidic technology
  • Method for preparing fiber with thermal insulation function based on microfluidic technology
  • Method for preparing fiber with thermal insulation function based on microfluidic technology

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Example 1: Preparation of phase change fibers whose inner phase is liquid phase change material liquid paraffin

[0035] Refer to attached figure 2 , using the method of the present invention to prepare suspended micro-droplets, the specific steps are as follows:

[0036] (1) Fabrication of the microfluidic device: clean the capillary glass tube and dry it; then use an extensometer to pull out one end of the glass capillary tube into a tapered shape; use sandpaper to grind the capillary glass tube to a suitable diameter; The glass capillary and the glass square tube are fixed on the glass slide; finally, the needle is sealed and fixed at the entrance of the glass tube with glue. Glass capillary microfluidic device as attached figure 1 As shown, there is an inner phase tube and a glass square tube through the outer phase.

[0037] (2) Preparation of internal phase and external phase: phase change material liquid paraffin is selected for the internal phase; ABC soluti...

Embodiment 2

[0040] Example 2: Preparation of phase change fibers whose internal phase is the solid phase change material myristyl alcohol

[0041] (1) Prepare glass capillary microfluidic devices as mentioned in Example 1, the internal phase solid phase change material myristyl alcohol; select the external phase as ABC solution, that is, sodium alginate with a mass fraction of 2.7%, and a mass fraction of A mixed solution of 4.6% polyethylene glycol 6000 (PEG) and 4.6% polyvinyl alcohol (PVA) in mass fraction.

[0042] (2) Preparation of fibers: inject the internal phase obtained in step (2) into the internal phase inlet of the capillary glass microfluidic device through a syringe pump; inject the external phase obtained in step (2) into the microfluidic device through a syringe pump The external phase inlet; the internal phase flow rate is 0.01ml / h, and the external phase flow rate is 0.2ml / h. At the outlet of the internal phase tube, the internal phase solution obtains fibers with node...

Embodiment 3

[0044] Example 3: Preparation of fibers with nodes with silk protein as one of the outer phase components

[0045] (1) Preparation of silk protein: first select a certain amount of natural silkworm cocoon, cut it into debris about the size of a bean grain, and then configure a mass fraction of 0.5% Na 2 CO 3 solution, heated in a water bath, and placed the shredded cocoon debris in Na 2 CO 3 In the solution, after boiling for about half an hour, replace with new Na 2 CO 3 Solution, repeat about 6 times, you can get cotton-like flocs, remove sericin, because sericin is in Na 2 CO 3 Hydrolysis will occur in the solution, and the floc silk obtained is mixed with lithium bromide / ethanol / water according to the mass ratio of 44:45:11, and the floc obtained after degumming is placed in the mixed solution in a 60°C water bath Heating, and then purifying through repeated operations such as dialysis and filtration, to obtain a silk fibroin solution.

[0046] (2) Preparation of fi...

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Abstract

The invention discloses a method for preparing fiber with a thermal insulation function based on the microfluidic technology. According to the method, a glass tube is used for preparing a microfluidiccontrol device, the device is composed of a cylindrical inner tube body and a square outer tube body, a phase change material is injected through the inner tube body, and a cross-linkable fiber solution is injected through the outer tube body. The phase change material in the microfluidic control device forms dispersed droplets under the shearing action of an external phase fiber solution, then the fiber solution is crosslinked and dried to obtain functional fiber with nodes, and the nodes are filled with the phase change material. When the temperature rises, the phase change material absorbsheat, when the temperature is reduced, the phase change material releases heat, and the thermal insulation function is achieved. The diameter of the fiber and the number and size of the nodes can beadjusted by changing the flow rates of the internal and external phases, the technology is simple in preparation process, and the prepared fiber can be used for heat preservation and energy storage and for cooling and heat dissipation and has broad application prospects.

Description

technical field [0001] The invention relates to a method for preparing fibers with heat preservation function based on microfluidic technology, and belongs to the field of microfluidic technology. Background technique [0002] At present, the traditional spinning technologies in the industry mainly include melt spinning, dry spinning and wet spinning. The main process of melt spinning includes melting and filamentation, which requires large-scale spinning and melting equipment, and can only be applied to substances that can be melted into a viscous fluid state without decomposition, generally polymers, which are polymerized through the internal high-temperature heating structure The material is melted into a fluid, which is extruded and cooled at the exit, and the melt-spun finished product is relatively rough, which cannot be satisfied for some occasions with high requirements. The main process of dry spinning includes the preparation of solution and solvent volatilization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/20D01F1/10D01F4/00D01F9/00
CPCD01D5/20D01F1/10D01F4/00D01F9/00
Inventor 何赛灵陈东王行政陈飞鸿
Owner 绍兴钠钇光电有限公司
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