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Preparation method of carbon nano tube/ thermoplastic polyurethane photoresponse intelligent driving material

A thermoplastic polyurethane and carbon nanotube technology, which is applied in the preparation of carbon nanotube/thermoplastic polyurethane light-responsive intelligent driving materials, and in the field of carbon nanotube/thermoplastic polyurethane composite materials, can solve the problems of no light driving and weak light absorption. , to achieve the effect of being conducive to large-scale production and wide application, simple process and low price

Inactive Publication Date: 2012-07-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermoplastic polyurethane has very weak light absorption in the range of 200-2000nm, and it is not light-driven itself.

Method used

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  • Preparation method of carbon nano tube/ thermoplastic polyurethane photoresponse intelligent driving material
  • Preparation method of carbon nano tube/ thermoplastic polyurethane photoresponse intelligent driving material
  • Preparation method of carbon nano tube/ thermoplastic polyurethane photoresponse intelligent driving material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Preparation of functionalized carbon nanotubes: the carbon nanotubes used in this example have an average length of 5um and an average diameter of 25nm. Take 10ml of sulfuric acid with a mass concentration of 98% and 30ml of nitric acid with a mass concentration of 37% to form a mixed solution. Put 150mg of carbon nanotubes into the above mixed solution and stir at room temperature for 2 hours, suction filter, wash with deionized water until neutral; redisperse the obtained carbon nanotubes in 150g of deionized water and ultrasonically for 1.5 hours; 239.3mg of p-aminobenzene Dissolve sulfonic acid in a mixed solution of 32g water and 2.6g 1mol / L hydrochloric acid; dissolve 93.7mg sodium nitrite in 20g water, add the above aqueous solution of sodium nitrite dropwise to the p-aminobenzenesulfonic acid solution, and react in an ice bath for 1 hours, to obtain the diazonium salt solution of p-aminobenzenesulfonic acid: then add 333 mg of diazonium salt of p-aminobenzenes...

Embodiment 2

[0022] 1) The preparation process of functionalized carbon nanotubes is the same as Step 1) of Example 1.

[0023] 2) Preparation of 1wt% functionalized carbon nanotubes / thermoplastic polyurethane light-responsive-driven smart material film: disperse 20 mg of functionalized carbon nanotubes into 14 ml of N,N dimethylformamide, and disperse by ultrasonic for 1 hour. Add 2 g of thermoplastic polyurethane to the above solution, heat at 75° C. for 1 hour, and then ultrasonically disperse for 1.5 hours. The obtained mixed solution was poured into a tetrafluoroethylene mold, and vacuum-dried at 60° C. for 36 hours to obtain a carbon nanotube / thermoplastic polyurethane light-responsive intelligent driving material with a film thickness of about 2 mm.

[0024] The carbon nanotube / thermoplastic polyurethane light-responsive intelligent driving material film has good light-driven performance. The composite film containing 1wt% carbon nanotubes can lift a 50g weight up 3cm under the irra...

Embodiment 3

[0026] 1) The preparation process of functionalized carbon nanotubes is the same as Step 1) of Example 1.

[0027] 2) Preparation of 2wt% functionalized carbon nanotubes / thermoplastic polyurethane photoresponsive-driven smart material film: disperse 40 mg of functionalized carbon nanotubes into 14 ml of N,N dimethylformamide, and disperse by ultrasonic for 1 hour. Add 2 g of thermoplastic polyurethane to the above solution, heat at 75° C. for 1 hour, and then ultrasonically disperse for 1.5 hours. The obtained mixed solution was poured into a polytetrafluoroethylene mold, and vacuum-dried at 60° C. for 36 hours to obtain a carbon nanotube / thermoplastic polyurethane light-responsive intelligent driving material with a film thickness of about 2 mm.

[0028] The carbon nanotube / thermoplastic polyurethane light-responsive intelligent driving material film has good light-driven performance. The composite film containing 1wt% carbon nanotubes can lift a 50g weight up 3cm under the i...

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Abstract

The invention discloses a preparation method of a carbon nano tube / thermoplastic polyurethane photoresponse intelligent driving material. Surface modification is conducted on a carbon nano tube through the acidification and sulfonation processes, the functionalized carbon nano tube is mixed with the thermoplastic polyurethane through a solution mixing method, the carbon nano tube and the polyurethane are evenly mixed through ultrasonic processing, and the mixed solution is poured into a teflon grinding tool and is dried in vacuum mode to obtain a composite film. The composite film has good phofic driving performance, the composite film containing 1 wt% of carbon nano tube is capable of lifting 50g of objects by 3cm under irradiation of light, the response time is 7-8 seconds, and the shape restoring rate can reach over 80%. Simultaneously, the mechanical performance of the material is greatly improved, and the Young modulus is improved by 70% to 100%.

Description

Technical field [0001] The invention relates to a method for preparing a carbon nanotube / thermoplastic polyurethane light-responsive intelligent drive material and belongs to the carbon nanotube / thermoplastic polyurethane composite material technology. Background technique [0002] Driving devices are an extremely important component in intelligent systems. Polymer materials have the typical characteristics of soft substances and are easy to respond to external fields, so they play an irreplaceable role in the research of intelligent driving materials. Using light as a driving force can meet people's needs for fast, remote and non-contact precise control of smart materials and systems. Utilizing the photodeformation of polymer materials can convert light energy into thermal energy, and further convert thermal energy into mechanical energy, which is expected to promote the development of micro-photo-mechanical energy conversion devices. [0003] Thermoplastic polyurethane ha...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L75/04C08K9/04C08K3/04
Inventor 封伟郭海强冯奕钰
Owner TIANJIN UNIV
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