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Silver nanothread/silk fibroin composite fiber and preparation method thereof

A technology of silk fibroin and silver nanowires, applied in the field of fiber materials, can solve the problems of no obvious improvement in electrical conductivity, no improvement in flexibility, complicated operation process, etc., to solve the problems of low reduction efficiency, improved mechanical properties, enhanced Evenly distributed effect

Active Publication Date: 2019-09-13
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the invention patent of a preparation method of flexible conductive yarn (CN201910059807.5), carbonization of natural silk is used as the substrate of conductive yarn, and silver nanowires prepared by hot solvent method are combined with carbonized natural silk. Butadiene rubber package, the flexibility of the conductive yarn prepared by electrospinning has been improved, but the operation process is complicated, and the conductivity has not been significantly improved
[0007] In an invention patent of a silk electrode material based on a silver nanowire conductive network and its preparation method (CN201811381096.5), it is disclosed that a chelation effect between sulfhydryl groups and silver and encapsulation of silk fibroin are used to combine The silk electrode material with silver nanowires firmly attached to the surface of silk improves the conductivity of the silk electrode material to a certain extent, but the flexibility has not been improved, which limits its practical application

Method used

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  • Silver nanothread/silk fibroin composite fiber and preparation method thereof
  • Silver nanothread/silk fibroin composite fiber and preparation method thereof
  • Silver nanothread/silk fibroin composite fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A preparation method of silver nano wire / silk fibroin composite fiber, comprising the following steps:

[0056] Preparation of S1 silk fibroin membrane:

[0057] S11 Boil silkworm cocoons in 0.5wt% Na2CO3 aqueous solution for 30 minutes for degumming, and thoroughly wash with deionized water for 3 times, each time for 20 minutes;

[0058] S12 After thoroughly drying overnight in the air, dissolve the degummed silk fibroin in 9.0M lithium bromide aqueous solution at 60°C for 4h;

[0059] S13 Dialyze the solution described in S12 with deionized water for 3 days under the cellulose membrane of the dialysis tubing (molecular weight cut-off: 14000);

[0060] S14 Centrifuge the obtained silk fibroin aqueous solution twice at 9000 rpm for 20 min, and then put it into a petri dish to evaporate to obtain a regenerated silk fibroin film.

[0061] S2 Synthesis of AgNWs using a modified polyol method:

[0062] S21 Dissolve 35g PVP and 80mg ZnCl 2 in 300mL EG, stir and dissolve a...

Embodiment 2-4

[0086] Embodiment 2-4 provides the preparation method of nano-silver wire-silk fibroin composite fiber, compared with embodiment 1, the difference is that the mass fraction of silver nano-wire is changed, except for the above-mentioned difference, other operations are the same, No more details here; the specific parameters are shown in Table 1.

[0087] Table 1

[0088] Example AgNW(wt%) Example 1 25.1 Example 2 5.9 Example 3 12.1 Example 4 18.1

[0089] Embodiment 1-4 of the present invention and the silk fibroin fiber SEM figure that comparative example 1 prepares carry out comparative analysis, as figure 1 shown. The results showed that the pure regenerated silk fibroin fibers were colorless, while the AgNW / silk fibroin composite fibers were dark and monofilamentous. With the increase of AgNW concentration, the color of the composite fiber becomes darker gradually. The surface morphologies of pure regenerated silk fibroin fibers a...

experiment example 1

[0103] Experimental example 1 Folding test of composite fiber

[0104]Foldability of composite fibers with 18.0wt% AgNW during 180° inner and outer folding. Such as figure 2 As shown in (a), a test device was prepared by connecting and mounting the composite fiber and fiber LED lamp on a PET substrate using double-sided adhesive tape and tinfoil. When electricity passes through the device, the LED glows red. When the substrate is folded inwards, the LED lights are still bright and the brightness is not reduced. When turned on, the LED light remains steady. In the folding test, the fibers exhibited high flexibility and electrical conductivity due to the synergistic effect of the silk fibroin fiber matrix and the AgNW conductive filler. Fold-out tests were also performed, as figure 2 (b) shown. When the PET substrate is folded outward by 180°, the LED light also glows red, but the fiber is not damaged, and the LED light is still stable.

[0105] In summary, the composit...

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Abstract

The invention discloses a silver nanowire / silk fibroin composite fiber and a preparation method thereof. A wet spinning technology is adopted. The method comprises the following steps: firstly, preparing a regenerated silk fibroin film; then, synthesizing silver nanowires, and dissolving the prepared silk fibroin film in a silver nanowire / acidic solvent dispersion system to form a silk fibroin / silver nanowire / acidic solvent spinning solution; finally, preparing the single-fibrous silver nanowire / silk fibroin composite fiber with high conductivity and high flexibility. The prepared silver nanowire / silk fibroin composite fiber has huge application prospect in the fields of wearable equipment, biomedical sensors, implantable devices, intelligent clothing, flexible solar cells and medical tissue engineering.

Description

technical field [0001] The invention belongs to the field of fiber materials, and in particular relates to a silver nanowire / silk fibroin composite fiber and a preparation method thereof. Background technique [0002] Biocompatible flexible conductive composite fibers have great application prospects, such as wearable devices, implantable devices, smart clothing, flexible solar cells, biomedical sensors, etc., and have attracted extensive research interest. [0003] Due to its good mechanical properties, biocompatibility and controllable biodegradability and other excellent properties, silk has been widely used in optics, medicine, tissue engineering and other fields. As a natural protein fiber, silk is an ideal base material for the preparation of biocompatible flexible conductive composites. Silver nanowires (AgNWs) have unique surface and interface effects, can be densely arranged to form ultra-small circuits, increase the current-collecting area, and have excellent elec...

Claims

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Application Information

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IPC IPC(8): D01F4/02D01F1/09
CPCD01F1/09D01F4/02
Inventor 陆莹王栋赵青华李沐芳蒋海青罗梦颖
Owner WUHAN TEXTILE UNIV
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