Method for preparing polycarbazole derivative nanofiber

A technology of nanofibers and derivatives, applied in the direction of nanotechnology, fiber chemical characteristics, single-component synthetic polymer rayon, etc., can solve low production efficiency, high cost of electrospinning equipment, and many factors that need to be controlled by equipment, etc. problem, to achieve the effect of improving efficiency

Active Publication Date: 2019-01-04
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the solution blending method, the cost of electrospinning equipment is high, the production efficiency is low, and the factors to be controlled by the equipment are many and complex (such as voltage, flow rate, spinning distance, temperature, humidity, etc.)

Method used

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  • Method for preparing polycarbazole derivative nanofiber
  • Method for preparing polycarbazole derivative nanofiber
  • Method for preparing polycarbazole derivative nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of preparation of polycarbazole derivative nanofiber, the steps are as follows:

[0049] Step 1: Surface treatment of the silicon wafer: The silicon wafer of 1 cm×1 cm is irradiated with ozone generated by ultraviolet light to oxidize the silicon wafer for 1 hour.

[0050] Step 2: Select PCDTBT with a weight-average molecular weight of 34.9 kg / mol and PEO with a molecular weight of 35 kg / mol as raw materials, dissolve in chlorobenzene at a mass ratio of PCDTBT:PEO of 1:1 (each 10 mg of PCDTBT and PEO) to obtain a total of Mixed solution, the sum of the mass percentages of PCDTBT and PEO in the mixed solution is 0.1 wt%.

[0051] Step 3: The blended solution was placed in a 70°C hot stage and heated for 6h until the solute was dissolved.

[0052] Step 4: Using the surface-treated silicon wafer as a substrate, a spin coater was used to spin at a speed of 3000 rpm for 30 seconds to prepare a thin film to obtain a PCDTBT and PEO blended thin film with a thickness of...

Embodiment 2

[0056] A preparation of polycarbazole derivative nanofibers, the steps of which are basically the same as in Example 1, and the similarities will not be repeated, except that the sum of the mass percentages of PCDTBT and PEO in the blending solution is 0.25wt %, PCDTBT and PEO blend films with a thickness of about 15nm were obtained.

[0057] like figure 2 As shown, the PCDTBT film on the silicon wafer has a network morphology composed of nanofibers and aggregates, and the width of the PCDTBT nanofibers is about 20nm.

Embodiment 3

[0059] A preparation of polycarbazole derivative nanofibers, the steps of which are basically the same as in Example 1, and the similarities will not be repeated, except that the sum of the mass percentages of PCDTBT and PEO in the blending solution is 0.5wt %, PCDTBT and PEO blend films with a thickness of about 20nm were obtained.

[0060] like image 3 As shown, the PCDTBT film on the silicon wafer in figure a is a network morphology composed of nanofibers and aggregates, in which the width of PCDTBT nanofibers is about 20nm. The diagram of conductive atoms in b shows that PCDTBT nanofibers have obvious electrical signals and form a conductive network together with PCDTBT aggregates.

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Abstract

The invention discloses a method for preparing a polycarbazole derivative nanofiber. The method comprises the following steps that surface treatment is carried out on a silicon chip; raw materials PCDTBT and PEO are added into a solvent to prepare a blended solution; the blended solution is placed on a heating stage until solute is dissolved; the treated silicon chip serves as a substrate, and a rotating coating machine is utilized to prepare blending film through a rotating coating method; and the blending film is washed and blow-dried with a nitrogen gun to obtain nanofibrous PCDTBT film. The method for preparing the polycarbazole derivative nanofiber has the advantages that the difficulty of conjugated macromolecular chain motion represented by PCDTBT is overcome, a method for preparinga conjugated macromolecular nanofiber simply and easily is provided, and the method is conductive to improving the efficiency of PCDTBT-based photoelectric device in the production practice.

Description

technical field [0001] The invention belongs to the technical field of nanofiber preparation, in particular to a method for preparing polycarbazole derivative nanofibers. Background technique [0002] Polycarbazole derivatives, the full name is poly[[9-(1-octylnonyl)-9H-carbazole-2,7-diyl]-2,5-thiophenediyl-2,1,3-benzothiadi oxazole-4,7-diyl-2,5-thiophenediyl], English abbreviation PCDTBT. As a conjugated polymer, it has higher thermal stability and narrower optical bandgap than the widely studied poly(3-hexylthiophene) (P3HT), so organic photovoltaic devices using PCDTBT as raw materials It is expected to replace P3HT-based devices. In addition, since PCDTBT is copolymerized by carbazole and benzothiadiazole, it has both electron acceptor and donor properties, which further expands its applicable range. Studies have shown that improving the crystallinity of materials or preparing crystal structures such as nanofibers can significantly improve the charge transport efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/74B82Y40/00
CPCB82Y40/00D01F6/74
Inventor 陈静波井磊张彬
Owner ZHENGZHOU UNIV
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