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Polyaniline/liquid crystal elastomer composite membrane material and preparation method thereof

A liquid crystal elastomer and polyaniline technology, applied in the field of photothermal functional polymers, can solve the problems of poor compatibility and low stability

Active Publication Date: 2016-06-01
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem: In order to solve the problems of poor compatibility and low stability between traditional liquid crystal elastomer composite film materials and inorganic materials, the present invention provides a kind of film with high photothermal conversion efficiency, low biological toxicity, good compatibility and high stability. Polyaniline / liquid crystal elastomer composite membrane material, and a preparation method of the material is also provided

Method used

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  • Polyaniline/liquid crystal elastomer composite membrane material and preparation method thereof
  • Polyaniline/liquid crystal elastomer composite membrane material and preparation method thereof
  • Polyaniline/liquid crystal elastomer composite membrane material and preparation method thereof

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preparation example Construction

[0030] Preparation of Polyaniline / Liquid Crystal Elastomer Composite Membrane Material

[0031] Dissolve polymethylsiloxane, liquid crystal monomer, olefin crosslinking agent containing terminal double bonds, and polyaniline in a mass ratio of 36:150:21:(1~20) in toluene, and ultrasonically disperse at room temperature for 5~ After 10 minutes, transfer to a polytetrafluoroethylene tank, add 45 parts of platinum catalyst solution, and continue ultrasonication for 10 to 20 minutes to remove air bubbles. Put the polytetrafluoroethylene tank in an oven at 60 to 65°C for thermal crosslinking for 2 to 4 hours, wait until the toluene solvent is completely volatilized, add a small amount of n-hexane to the polytetrafluoroethylene tank to soak, remove the film for stretch orientation . Put it back into an oven at 60 to 65° C. to continue thermal crosslinking for 24 to 48 hours to obtain a polyaniline / liquid crystal elastomer composite film material.

[0032] The polymethylsiloxane st...

Embodiment 1

[0042]Add 18.9 g (0.2 mol) of aniline liquid into 300 mL of aqueous hydrochloric acid solution with a concentration of 1 mol / L, and stir for 30 minutes under ice-cooling. Add 11.41 g (0.05 mol) of ammonium persulfate dissolved in 200 mL of 1 mol / L HCl solution dropwise. The temperature was kept below 5°C all the time with magnetic stirring for 6 hours. After the reaction was completed, the stirring was stopped, and the reaction solution was filtered, washed, and finally vacuum-dried at 40° C. for 24 hours to obtain 6.5 g of polyaniline solid powder with a yield of 34.4%.

Embodiment 2

[0043] Example 2: Preparation of conjugated polymer / liquid crystal elastomer light-to-heat conversion film material and its elongation and maximum load-bearing determination:

[0044] 36mg (0.6mmol) of polymethylsiloxane 150mg (0.5mmol) monomer 21 mg (0.05 mmol) crosslinker and 1 mg polyaniline Put them together into a brown vial containing 2mL of toluene, and the mass fraction of conjugated polyaniline in the total charge is 0.48%. Ultrasound for 10 minutes to disperse evenly, transfer to a 2cm×2cm×2cm polytetrafluoroethylene tank, add 45μL of Pt(COD)Cl 2 Catalyst solution, sonicate again for 15 minutes to remove air bubbles in the toluene solution. Pre-crosslink in an oven at 60 to 65°C for 2 to 4 hours. After the toluene solvent is completely volatilized, take out the polytetrafluoroethylene tank, cool to room temperature, add a small amount of n-hexane in the tank and soak for 2 minutes, take off the film for stretching orientation, and the elongation of the film ...

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Abstract

The invention discloses a polyaniline / liquid crystal elastomer composite membrane material and a preparation method thereof. The polyaniline / liquid crystal elastomer composite membrane material is a conjugated polyaniline doped liquid crystal elastomer polymer, polysiloxane is taken as a main chain in the liquid crystal elastomer polymer, a certain amount of a catalyst is added into a monomer with an ethylenic bond at a single end and a cross-linking agent with ethylenic bonds at two ends so as to prepare the liquid crystal elastomer composite membrane material in a two-step cross-linking manner under a heating condition, and conjugated polyaniline is doped in different ratios in the preparation process. Conjugated polyaniline is a photo-thermal conjugated polymer which is high in photo-thermal conversion efficiency, good in stability and free of biotoxicity, has an intensive absorbing peak 800 nm near a near-infrared region, and can very intensively absorb near-infrared light. The polyaniline / liquid crystal elastomer composite membrane material disclosed by the invention can be applied to fields such as solar photo-thermal conversion, shape memory materials, biosensors and medicines.

Description

technical field [0001] The invention belongs to the field of photothermal functional polymers, and relates to a class of conjugated polyaniline with photothermal conversion function and a method for preparing a liquid crystal elastomer composite film. Background technique [0002] Since Finkelmann first synthesized polysiloxane side chain liquid crystal elastomers in 1981, the research on liquid crystal elastomers has become a new branch in the field of liquid crystal polymer research in the past 30 years. Polysiloxane-based liquid crystal polymers are macromolecules with liquid crystal properties, with polysiloxane oligomers or polymers as the main chain and small liquid crystal molecules as rigid cores. The main chain of most polysiloxane liquid crystal polymers is a Si-O-Si bond, and the side chain is a Si-C or C-C bond. Therefore, it has both the characteristics of organic polymers and inorganic materials, such as good heat resistance , Ozone resistance, UV aging resist...

Claims

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Application Information

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IPC IPC(8): C08L51/08C08L79/02C08F283/12C08F216/12C08G73/02C08J5/18
CPCC08F283/128C08G73/0266C08G2250/00C08J5/18C08J2351/08C08J2479/02C08L51/08C08L2201/08C08L2203/16C08L79/02C08F216/125
Inventor 杨洪刘伟林保平
Owner SOUTHEAST UNIV
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