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Preparation method and application of composite film

A composite film and carbon nanotube composite technology, which is applied in textiles and papermaking, optics, fiber processing, etc., can solve the problems of easy dispersion and deformation, opaque fiber film, and unsatisfactory application, so as to achieve the diversification of preparation methods and improve phase The effect of capacitive and size adjustable

Pending Publication Date: 2021-08-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the pores between the fibers of the fiber membrane prepared by electrospinning, these pores will form a lot of interfaces between the fibers and the air, and the light is reflected and refracted at the interface between the fibers and the air, resulting in light loss, resulting in untreated fiber membranes. The whole is opaque
Moreover, due to the lack of interaction force between the oriented fibers, it is easy to disperse and deform, which cannot meet the practical application.

Method used

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  • Preparation method and application of composite film
  • Preparation method and application of composite film
  • Preparation method and application of composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]1) Disperse 0.1 g of multi-walled carbon nanotubes in 10 g of ethanol: water = 1:1 solvent, sonicate for 5 minutes with a sonicator, adjust to pH = 4 with hydrochloric acid, and add 0.5 g of silane coupling agent dropwise The mixed solution was magnetically stirred for 12 hours, then washed with ethanol, centrifuged and dried at 60° C. for 12 hours to obtain the modified carbon nanotubes. Its infrared spectrum is shown in figure 2 .

[0038] 2) Dissolve 0.9g PMMA in 4.055g TCM, add 0.0045g modified carbon nanotubes and stir for 12h to form a uniform spinning solution.

[0039] 3) Add the spinning solution into the syringe and fix it on the syringe pump. The distance from the needle to the drum is 20cm, the flow rate is 2mL / h, the drum speed is 1500r / min, the spinning voltage is 18kV, and the inner diameter of the flat needle is 0.61 mm, the outer diameter is 0.91mm, and the oriented carbon nanotube / PMMA composite fiber membrane is prepared. Remove the fiber film with...

Embodiment 2

[0044] 1) Disperse 0.1 g of multi-walled carbon nanotubes in 10 g of ethanol: water = 1:1 solvent, sonicate for 5 minutes with a sonicator, adjust to pH = 4 with hydrochloric acid, and add 0.5 g of silane coupling agent dropwise The mixed solution was magnetically stirred for 12 hours, washed with ethanol, centrifuged and dried at 60° C. for 12 hours.

[0045] 2) Dissolve 0.9g PMMA in 4.073g TCM, add 0.009g modified carbon nanotubes and stir for 12h to form a uniform spinning solution.

[0046] 3) Add the spinning solution into the syringe and fix it on the syringe pump. The distance from the needle to the drum is 20cm, the flow rate is 2mL / h, the drum speed is 1500r / min, the spinning voltage is 18kV, and the inner diameter of the flat needle is 0.61 mm, with an outer diameter of 0.91 mm, to prepare oriented fiber membranes. Remove the fiber film with a certain thickness from the drum and dry it at room temperature.

[0047] 4) Cut the fiber film dried at room temperature in...

Embodiment 3

[0050] 1) Disperse 0.1 g of multi-walled carbon nanotubes in 10 g of ethanol: water = 1:1 solvent, sonicate for 5 minutes with a sonicator, adjust to pH = 4 with hydrochloric acid, and add 0.5 g of silane coupling agent dropwise The mixed solution was magnetically stirred for 12 hours, washed with ethanol, centrifuged and dried at 60° C. for 12 hours.

[0051] 2) Dissolve 0.9g PMMA in 4.073g TCM, add 0.027g modified carbon nanotubes and stir for 12h to form a uniform spinning solution.

[0052] 3) Add the spinning solution into the syringe, fix it on the syringe pump, the distance from the needle to the roller is 20cm, the flow rate is 2mL / h, the rotating speed of the roller is 1500r / min, and the spinning voltage is 18kV to prepare an oriented fiber film. The fiber film with a certain thickness is removed from the drum and dried at room temperature.

[0053] 4) Cut the fiber film dried at room temperature into 80mm×50mm strips, put it into a sealed box filled with ethyl aceta...

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Abstract

The invention belongs to the technical field of composite material optics, and discloses a preparation method and application of a composite film. The composite film provided by the invention mainly comprises a polymer and a carbon nanotube. The method comprises the steps of carrying out surface modification on the carbon nanotube; uniformly mixing the polymer, the modified carbon nanotube and a solvent to obtain a mixed solution; obtaining an oriented polymer / carbon nanotube composite fiber film through an electrostatic spinning method; and annealing and setting the dried composite fiber film through the solvent to form a film, and then carrying out stretching and secondary orientation to obtain the product. The oriented carbon nanotube composite film provided by the invention has the advantages of various selectable raw material types, simple process and large-scale preparation, thereby having very good application prospects in the fields of liquid crystal display, imaging and the like.

Description

technical field [0001] The invention belongs to the technical field of composite material optics, and in particular relates to a preparation method and application of a composite thin film. Background technique [0002] In recent years, the liquid crystal industry has entered a new stage of rapid development, and polarized optical components have always played an important role in the backlight and imaging of liquid crystal displays. At present, polarized light is mainly produced by polarizers. At present, iodine-based polarizers are common in the market and the preparation technology is relatively mature. The preparation method is to adsorb iodide ions or dye molecules on polyvinyl alcohol (PVA), and then align Extend, make iodide ions or dye molecules align with the orientation of PVA molecular chains, forming long chains of iodide ions or dye molecules. Since iodide ions or dye molecules have good polarizing properties, they can absorb polarized light parallel to their a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/74D04H1/4382D01D5/00G02F1/1335
CPCD04H1/74D04H1/4382D01D5/0015G02F1/133528
Inventor 王林格陈雪阳于倩倩董学会
Owner SOUTH CHINA UNIV OF TECH
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