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Polyurethane/cellulose composite membrane electro-active material and preparation method thereof

A technology of electroactive materials and cellulose, applied in metal material coating process, ion implantation plating, coating, etc., can solve the problems of limited and small electroactive response of pure cellulose, and achieve low driving voltage and simple method Practical, low-cost effect

Inactive Publication Date: 2013-02-27
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electroactive response of pure cellulose is very small, which is very limited in practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve cellulose with a molecular weight of 200,000 in trifluoroacetic acid at room temperature to form a solution with a volume mass fraction of 3%, and obtain a cellulose solution after filtration; drop 1.68g of hexamethylene diisocyanate into 10g In poly(diethylene glycol hexamethylene glycol) with a molecular weight of 500, the molar ratio of NCO / OH is controlled to be 1, and the temperature is raised to 50° C. for 2 hours to obtain a polyurethane prepolymerization solution; take 50 ml of cellulose solution and 50 ml of Mix the polyurethane prepolymerization solutions together, stir them magnetically for 2 hours, then add 3ml of trimethylolpropane as a cross-linking agent, and stir evenly; cast the mixed solution to form a film, then raise the temperature to 60°C for 6 hours, and then Thoroughly dry under the sun; place the dried film in an aqueous solution containing 2% sodium hydroxide by mass fraction, soak it at room temperature for 4 hours, take it out and rin...

Embodiment 2

[0021] Dissolve cellulose with a molecular weight of 300,000 in N,N-dimethylacetamide / lithium chloride with a mass ratio of 92:8 at room temperature to form a solution with a volume fraction of 1.5%, and obtain after filtration Cellulose solution; drop 2.0g of hexamethylene diisocyanate into 10g of poly(diethylene glycol hexamethylene glycol) with a molecular weight of 500, control the molar ratio of NCO / OH to 1.2, and raise the temperature to 50°C React for 3 hours to obtain a polyurethane prepolymerization solution; take 50ml of cellulose solution and 50ml of polyurethane prepolymerization solution and mix together, stir magnetically for 2 hours, then add 2ml of crosslinking agent trimethylolpropane, stir evenly; pour the mixed solution into Then raise the temperature to 60°C to react for 4 hours, and then dry thoroughly at room temperature; place the dried film in an aqueous solution containing 2% sodium hydroxide, soak it at room temperature for 3 hours, and take it out for...

Embodiment 3

[0023] Dissolve cellulose with a molecular weight of 400,000 in methyl morphine oxide at room temperature to form a solution with a volume mass fraction of 0.5%, and obtain a cellulose solution after filtration; drop 0.84 g of hexamethylene diisocyanate into Add 10 g of poly(diethylene glycol hexamethylene glycol) with a molecular weight of 500, control the molar ratio of NCO / OH to 0.5, raise the temperature to 50° C. and react for 1 hour to obtain a polyurethane prepolymerization solution; take 50 ml of cellulose solution Mix together with 50ml polyurethane prepolymerization solution, stir magnetically for 2 hours, then add 4ml trimethylolpropane cross-linking agent, stir evenly; cast the mixed solution to form a film, then raise the temperature to 60°C and react for 8 hours, then Thoroughly dry at room temperature; place the dried film in an aqueous solution containing 2% sodium hydroxide, soak it at room temperature for 6 hours, take it out and rinse it repeatedly with deion...

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Abstract

The invention relates to a polyurethane / cellulose composite membrane electro-active material and a preparation method of the material; the preparation method comprises the following steps of: dissolving cellulose into solvent and preparing cellulose solution with a certain concentration; dripping hexamethylene diisocyanate into poly (diethylene glycol hexanedioic ester), and carrying out reaction for a period of time under the condition of heating to obtain polyurethane pre-polymer solution; mixing the cellulose solution and the polyurethane pre-polymer solution, adding cross-linking agent-trimethylolpropane into the mixed solution, and evenly stirring; pouring the mixed solution into a film, carrying out reaction for a period of time under the condition of heating, and thoroughly drying the film at the room temperature; treating the dried film in sodium hydroxide solution and hydrogen chloride solution for a period of time; and after drying, plating an electrode on the surface of the film under the vacuum condition to obtain the polyurethane / cellulose composite membrane electro-active material. The polyurethane / cellulose composite membrane electro-active material has the advantages of being low in driving voltage and large in response deformation, not needing wet environment and the like. The preparation method is simple in technology, low in cost and easy in industrial production.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a polyurethane / cellulose composite film electroactive material and a preparation method of the electroactive material. Background technique [0002] Electroactive materials are a class of smart materials, which are characterized by the ability to deform under the induction of an external electric field, thereby producing a mechanical response. The response form can be bending, contraction or expansion, etc., so as to achieve functions such as actuation, fastening, and sensing. Electroactive materials can be used as driving devices to construct new products, electromechanical systems or robots, because they do not require conventional mechanical driving devices, such as motors, gears, etc., which greatly reduces the weight of the system and changes the traditional machine design concept. The design of special-shaped machines provides a broad space for innovation, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L1/02C08L75/06C08G18/42C23C14/20
Inventor 蔡志江
Owner TIANJIN POLYTECHNIC UNIV