Method and device for preparing nanofiber yarn

A nanofiber and preparation device technology, applied in the field of nanofiber yarns, can solve the problems of poor comprehensive mechanical properties of nanofiber yarns, uneven twist transfer of nanofiber yarns, and difficulty in controlling the twist degree of twisting, so as to achieve enhanced mechanical properties and uniformity. high temperature and reduce air pollution

Active Publication Date: 2019-04-12
JIAXING UNIV
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  • Abstract
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Problems solved by technology

[0010] The preparation method and device of nanofiber yarn provided by the related art generally have the problem of complex equipment, and the prepared nanofiber yarn has technical problems such as uneven twist transfer, difficult control of twisting twist, poor continuity and poor uniformity, resulting in the preparation of The comprehensive mechanical properties of the obtained nanofiber yarn are poor, and the applicability is limited

Method used

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  • Method and device for preparing nanofiber yarn
  • Method and device for preparing nanofiber yarn
  • Method and device for preparing nanofiber yarn

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preparation example Construction

[0067] The present invention also shows a flow chart of a method for preparing a nanofiber yarn using the above-mentioned nanofiber yarn preparation device, as Figure 7 shown in Figure 7 In, the preparation method of described nanofiber yarn comprises:

[0068] Step 701, dispensing the spinning liquid, putting the prepared spinning liquid into each syringe of the spinning module, and then installing each syringe in the syringe channel of the syringe pump.

[0069] Among them, the polymers used to prepare the spinning solution include fiber-forming polymers including polyurethane, polyamide, polylactic glycolic acid, silk fibroin, gelatin, collagen, etc.; the solvents used to prepare the spinning solution include distilled water, hexafluoroisopropanol Ethanol, dimethylformamide, tetrahydrofuran, etc.; other additive materials used to prepare spinning solutions include functional materials such as nano-silver, graphene, and ferroferric oxide.

[0070] Step 702, after setting...

Embodiment 1

[0083] The preparation device of the nanofiber yarn that this embodiment involves is as Figure 4 shown. Before spinning, dissolve 0.16g of polyurethane (PU, molecular weight: 60000g / mol) in a mixed solvent consisting of 9.2g of dimethylformamide (DMF) and 9.2g of tetrahydrofuran (THF), and stir magnetically at 40°C 12h to obtain PU spinning solution. When spinning, put the PU spinning liquid into the syringes of each injection pump of the spinning module, and then adjust the parameters. The two spinnerets are set in the upper liquid tank of the liquid vortex twisting module, 200mm above the liquid vortex liquid level. At 45° from the liquid surface of the vortex pointing to the center of the vortex, the two spinnerets are located on the diameter of the circular vortex with a distance of 350mm. Both injectors deliver PU spinning liquid to the spinneret at a speed of 0.8ml / h, and both spinnerets apply an electrostatic voltage of +12Kv, so that the PU spinning liquid is jetted...

Embodiment 2

[0085] The preparation device of the nanofiber yarn that this embodiment involves is as Figure 4 shown. Before spinning, the polyurethane of 0.16g (PU, molecular weight is 60000g / mol) and 0.002g ferric oxide (Fe 3 o 4 ) was dissolved in a mixed solvent consisting of 9.2g dimethylformamide (DMF) and 9.2g tetrahydrofuran (THF), and stirred magnetically at 40°C for 12h to obtain PU-Fe 3 o 4 spinning solution. When spinning, the PU-Fe 3 o 4 The spinning solution is respectively loaded into the syringes in the two syringe pumps of the spinning module for spinning. Then adjust the parameters, set the two spinnerets in the upper liquid tank of the liquid vortex twisting module, 200mm directly above the liquid vortex liquid level, and point to the center of the vortex at 45° with the liquid vortex liquid surface, and the two spinnerets are located in the circle On the diameter of the shaped vortex, the distance is 450mm. Both injectors deliver PU-Fe to the spinneret at a spee...

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Abstract

The invention discloses a method and a device for preparing nanofiber yarn, and relates to the technical field of nanofiber yarn. According to the method and the device for preparing the nanofiber yarn, provided by the invention, the nanofiber yarn is prepared through water bath eddy reverse yarn forming, and continuous preparation of the nanofiber yarn can be realized; the height and angle of a spinning nozzle can be adjusted at random through the adjustment of a first adjusting screw and a second adjusting screw on a support, and the operation is simple and convenient; the spinning nozzle isused for ejecting nanofiber into a liquid eddy of an upper liquid groove, so that the air pollution caused by solvent evaporation can be reduced; the nanofiber rotates and is collected under the effect of the liquid eddy, and simultaneously the fiber is further orientated through the upward drafting of the yarn and the downward drafting of the eddy, so that the uniformity is higher; the nanofiberrotates and is twisted under the effect of the liquid eddy, the nanofiber is stable and controllable, and the mechanical property of yarn forming is excellent; and after the nanofiber is formed through drying, the mechanical property of the yarn can be further strengthened, and the adhesion among the yarns is reduced.

Description

technical field [0001] The invention relates to the technical field of nanofiber yarns, in particular to a method and device for preparing nanofiber yarns. Background technique [0002] Nanofibers have excellent properties such as large specific surface area and high porosity, so they have great application value in filter materials, biomedical materials, composite reinforcement materials, electronic devices, protective materials, sensors and other fields. [0003] At present, the preparation methods of nanofiber yarn mainly include mechanical twisting method, air eddy current twisting method, water bath method, film splitting method and core yarn method. [0004] Among them, the mechanical twisting method mainly relies on the motor to control the funnel-shaped target, circular, circular and other collecting devices to rotate and twist to prepare continuously oriented nanofiber yarns. For example, Chinese patents 201320084010.9 and 201310058070.8 overlap nanofibers between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D13/00D01H4/02D01H13/28D01H1/36
CPCD01D13/00D01H1/36D01H4/02D01H13/28
Inventor 詹建朝方瑞峰李莺刘玲
Owner JIAXING UNIV
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