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Ionic polymer composite material for brake and preparation method thereof

A technology of ionic polymers and composite materials, which is applied in the field of ionic polymer composite materials and its preparation, can solve the problems of affecting the service life of actuators, increasing the braking strain of actuators, and poor electro-mechanical coupling effects. Achieve the effects of large ion exchange capacity, enhanced grip strength, and large strain displacement

Active Publication Date: 2011-04-20
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has the advantages of fast response and large deformation displacement under the stimulation of a small electric field, its disadvantages are: on the one hand, the braking stress of the IPMC actuator is small, and the electro-mechanical coupling effect is poor; on the other hand, the noble metal electrode layer Easy to peel off the surface of the ion exchange membrane, which seriously affects the service life of the actuator
C.Park et al. used the unmodified carbon nanotube film as the electrode layer, and hot-pressed it on both sides of the polyimide to form the actuator material; compared with the metal silver electrode on the surface of the polyimide, the carbon nanotube is Good flexibility, which increases the braking strain of the actuator; but the middle layer uses the electrostrictive material-polyimide, and its strain is much smaller than the strain caused by the ion exchange membrane (see Journal of Polymer Science: Part B, 2008, 46: 2532), and poor adhesion between unmodified carbon nanotube sheet and polymer
[0004] So far, the actuator materials with ionic polymer-grafted carbon nanotube felt as the electrode layer and the ion-exchange membrane of carbon nanotube-reinforced polyvinyl alcohol / poly-styrenesulfonate-co-acrylic acid as the intermediate layer are used in Improve the electro-mechanical coupling efficiency of the actuator and increase the service life of the actuator, and its preparation method has not been reported

Method used

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  • Ionic polymer composite material for brake and preparation method thereof
  • Ionic polymer composite material for brake and preparation method thereof
  • Ionic polymer composite material for brake and preparation method thereof

Examples

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example 1

[0032] Disperse 10 mg of carbon nanotubes in 20 ml of water, oscillate ultrasonically for 15 min, then add 100 mg of sodium styrene sulfonate to the dispersion, then add 0.5 mg of ammonium persulfate under nitrogen protection, and heat up to 70°C for 12 h under reflux. After the reaction is completed, filter through a microporous membrane, wash with water for three times, and dry to obtain the ion polymer-grafted carbon nanotube.

[0033] Under ultrasonic vibration for 15 min, 5 mg of ionomer-grafted carbon nanotubes were ultrasonically dissolved in 10 ml of water. After filtering through a microporous membrane, washing with water for 3 times, and drying, the membrane was peeled off to obtain an ionomer-grafted carbon nanotube felt.

[0034] Dissolve 100mg of acrylic acid and 900mg of sodium styrene sulfonate in 99ml of water, then add 5mg of ammonium persulfate under nitrogen protection, and heat up to 70°C for 12h under reflux. After the reaction is completed, it is precipi...

example 2

[0037] Disperse 10mg of carbon nanotubes in 20ml of water, ultrasonically oscillate for 15min, then add 10mg of sodium styrene sulfonate and 90mg of acrylic acid into the dispersion, then add 0.5mg of ammonium persulfate under nitrogen protection, and heat up to 70°C Reflux for 12h. After the reaction is completed, filter through a microporous membrane, wash with water for three times, and dry to obtain the ion polymer-grafted carbon nanotube.

[0038] Under ultrasonic vibration for 15 min, 5 mg of ionomer-grafted carbon nanotubes were ultrasonically dissolved in 10 ml of water. After filtering through a microporous membrane, washing with water for 3 times, and drying, the membrane was peeled off to obtain an ionomer-grafted carbon nanotube felt.

[0039]Dissolve 100mg of acrylic acid and 900mg of sodium styrene sulfonate in 99ml of water, then add 5mg of ammonium persulfate under nitrogen protection, and heat up to 70°C for 12h under reflux. After the reaction is completed,...

example 3

[0042] Take 100mg of carbon nanotubes and ultrasonically disperse them in 30ml of water, ultrasonicate for 30min, then add 3g of acrylic acid and 3g of sodium styrene sulfonate to it, then add 60mg of potassium persulfate under nitrogen protection and heat up to 80°C for 16h under reflux. After the reaction is completed, filter through a microporous membrane, wash with water three times, and dry to obtain the ion polymer-grafted carbon nanotube.

[0043] Disperse 60mg of grafted carbon nanotubes in 30ml of water, and sonicate for 45min. Filtrate through a microporous membrane, wash with water for 3 times, dry and peel off the membrane to obtain the ionic polymer grafted carbon nanotube felt.

[0044] 3g of acrylic acid and 3g of sodium styrene sulfonate were dissolved in 30ml of water, then 60mg of potassium persulfate was added under the protection of nitrogen and the temperature was raised to 80°C and refluxed for 16h. After the reaction is completed, poly(sodium styrene su...

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Abstract

The invention provides a polymer composite material using a two-layer ionic polymer grafted carbon nanotube felt as an electrode layer and clamping a carbon nanotube reinforced ion exchange membrane in the middle aiming at the defects that the electroactive polymer actuator of the prior art has weak power coupling and short service life of an electrode. A preparation method for the polymer composite material comprises the following steps: firstly, preparing an ionic polymer grafted carbon nanotube, the ionic polymer grafted carbon nanotube felt and the ion exchange membrane; and finally bonding the ionic polymer grafted carbon nanotube felt to two surfaces of the ion exchange membrane by polyvinyl alcohol water solution for hot pressing to form the ionic polymer composite material with a sandwich structure. The material has the advantages that the ion exchange membrane has large ion exchange capacity, so the actuator has large strain, and the power coupling efficiency and holding power of the actuator are improved.

Description

technical field [0001] The invention relates to an ionic polymer composite material used for actuators and a preparation method thereof, in particular to a micro-actuator with electroactive carbon nanotube felts grafted with two layers of ionic polymers It is an electrode layer, a polymer composite material with a carbon nanotube reinforced ion exchange membrane in the middle and a preparation method thereof. Background technique [0002] In recent years, electroactive polymer actuators, which can convert electrical energy into mechanical brakes, are light, flexible, and easy to process and shape, and have attracted more and more attention from scientific and technological workers in related fields. At the same time, electroactive polymers have potential application prospects in underwater robots, artificial muscles, and biomedical materials and equipment. Among them, the actuator made of ionomer metal composite (IPMC) with commercial ion exchange membranes such as nafion a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N11/00C08F292/00C08F212/14C08F22/06C08J5/22
Inventor 解孝林杜飞鹏周兴平
Owner HUAZHONG UNIV OF SCI & TECH
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