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A kind of silk fibroin/graphene composite conductive film and preparation method thereof

A graphene composite and conductive film technology, applied in the preparation of silk fibroin/graphene composite conductive film, in the field of silk fibroin/graphene composite conductive film, can solve the complex preparation process, poor product conductivity, chemical dosage major problems, to achieve the effect of simple and environmentally friendly method, non-toxic preparation process and low cost

Active Publication Date: 2021-04-09
NANTONG TEXTILE & SILK IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, the amount of chemicals used in the preparation method is large, and some chemicals are toxic (such as hexafluoroisopropanol, 4-methylmorpholine-N-oxide, etc.), and the preparation process is relatively cumbersome and complicated, and takes a long time. The cost is high, and the most important thing is that the prepared product has poor electrical conductivity

Method used

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  • A kind of silk fibroin/graphene composite conductive film and preparation method thereof
  • A kind of silk fibroin/graphene composite conductive film and preparation method thereof
  • A kind of silk fibroin/graphene composite conductive film and preparation method thereof

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Embodiment 1

[0033] The preparation of embodiment 1 silk fibroin solution and graphene slurry

[0034] Take 80g silkworm raw silk and put it into 4000ml sodium carbonate solution with a concentration of 0.06%, boil three times at 98-100°C, use deionized water for each treatment for 30min each time, remove the sericin in the raw silk, wash and pull After loosening, place it in an oven at 60°C to dry to obtain pure silk fiber. Dissolve the dried silk fiber in 9.3M lithium bromide solution at 60°C, the bath ratio is 3:20, and the dissolution time is about 1 hour. After it cools down, take it out and put it into a dialysis bag and place it in deionized water for dialysis for 3 days , to obtain a silk fibroin solution, and put it in a 4°C refrigerator for later use. When in use, the concentration of the silk fibroin solution is adjusted to 5-50 mg / mL with deionized water.

[0035] The graphene slurry is prepared by using a liquid phase exfoliation method and using N-methylpyrrolidone as a sol...

Embodiment 2

[0036] The preparation of embodiment 2 silk fibroin / graphene composite conductive film

[0037] (1) Dispersion solution preparation: Take 1 g of polyvinyl alcohol with a degree of polymerization of 1000 and a degree of alcoholysis of 99%, and dissolve it in 1000 mL of deionized water to obtain an aqueous solution of polyvinyl alcohol (PVA) with a concentration of 1 mg / mL.

[0038] (2) Preparation of graphene dispersion: the graphene slurry prepared in Example 1 is added in the polyvinyl alcohol aqueous solution of step (1), the mass ratio of control graphene and PVA is 1:1, after mixing, add dialysis The bag was dialyzed with running water for 10 hours to remove N-methylpyrrolidone and obtain a graphene aqueous dispersion. The specification of the dialysis bag used in this embodiment is 8000-14000Da.

[0039](3) Preparation of silk fibroin / graphene mixed solution: Slowly add the graphene aqueous dispersion in step (2) to the silk fibroin solution prepared in Example 1, stir a...

Embodiment 3

[0042] The preparation of embodiment 3 silk fibroin / graphene composite conductive film

[0043] (1) Dispersion solution preparation: Take 0.2 g of polyvinyl alcohol with a degree of polymerization of 800 and a degree of alcoholysis of 99%, and dissolve it in 1000 mL of deionized water to obtain an aqueous solution of polyvinyl alcohol (PVA) with a concentration of 0.2 mg / mL.

[0044] (2) Preparation of graphene dispersion: the graphene slurry prepared in Example 1 is added in the polyvinyl alcohol aqueous solution of step (1), the mass ratio of control graphene and PVA is 5:1, add dialysis after mixing The bag was dialyzed with running water for 8 hours to remove N-methylpyrrolidone and obtain a graphene aqueous dispersion. The specification of the dialysis bag used in this embodiment is 8000-14000Da.

[0045] (3) Preparation of silk fibroin / graphene mixed solution: Slowly add the graphene aqueous dispersion in step (2) to the silk fibroin solution prepared in Example 1, stir...

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Abstract

The invention discloses a silk fibroin / graphene composite conductive film and a preparation method thereof. The preparation method comprises the following steps: adding graphene slurry into a dispersant aqueous solution, putting it into a dialysis bag and dialysis to obtain a graphene aqueous solution, Mix the above solution and silk fibroin solution in proportion to obtain a silk fibroin / graphene mixed solution, heat the silk fibroin / graphene mixed solution and the template respectively, then drop the silk fibroin / graphene mixed solution onto the template, Dry under constant humidity to form a film to obtain a silk fibroin / graphene composite conductive film. The preparation method of the present invention is simple and efficient, the reaction conditions are mild, and the cost of materials is low. The prepared silk fibroin / graphene composite conductive film has good biocompatibility, mechanical properties and electrical conductivity, and can be used in tissue regeneration such as human nerve conduits. , the repair field and the sensor field all have extremely bright application prospects.

Description

technical field [0001] The invention relates to the technical field of graphene materials and conductive films, in particular to a method for preparing a silk fibroin / graphene composite conductive film and the silk fibroin / graphene composite conductive film prepared by the preparation method. Background technique [0002] The silk fibroin obtained after degumming, dissolving and purifying silk has good mechanical properties and physical and chemical properties, is easy to be processed into various forms, and has good biocompatibility and controllable biodegradability. [0003] Graphene is a carbon atom with sp 2 The hybrid orbitals form a hexagonal two-dimensional carbon nanomaterial with a honeycomb lattice. It has rich and unique mechanical, thermal and optoelectronic properties, which make graphene the "king of new materials" in the 21st century. [0004] Graphene and silk fibroin are two materials with complementary mechanical properties, resulting in ultrahigh stiffne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L89/00C08L29/04C08K3/04C08J5/18
Inventor 邢铁玲张浩然卢神州
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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