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Application of Block Polymers as Dielectric Elastomers

A technology of block polymers and dielectric elastomers, which is applied in the application field of block polymers as dielectric elastomers, can solve the problems of restricting the application of dielectric elastomers, short service life, and high transportation costs, and achieve matching The effect of flexible scheme, wide operating frequency range and high power density

Active Publication Date: 2018-02-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above two kinds of tri-block polymer dielectric elastomers need to be used after adding organic solvents to form a gel, which is not easy to process, which greatly restricts the application of dielectric elastomers, causing environmental pollution and short service life , high transportation costs, high storage costs and other disadvantages

Method used

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  • Application of Block Polymers as Dielectric Elastomers
  • Application of Block Polymers as Dielectric Elastomers
  • Application of Block Polymers as Dielectric Elastomers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Poly(styrene-b-n-butyl acrylate-b-styrene) triblock copolymer

[0033] In this example, the RAFT reversible addition-fragmentation chain transfer emulsion polymerization method is used for material preparation, and the specific steps are as follows:

[0034] (1) Add 30 parts by weight of water, 1 part by weight of RAFT amphiphilic macromolecular reversible addition and fragmentation chain transfer reagent, and 10 parts by weight of styrene into the reaction device, wherein the RAFT amphiphilic macromolecular reversible addition and fragmentation chain transfer reagent The molecular formula is:

[0035]

[0036] Stir and mix the above raw materials, blow nitrogen, heat up to 80°C, add 0.01 parts by weight of a water-soluble initiator, initiate polymerization for 5 hours, add an aqueous solution containing 2 parts by weight of alkali, slowly add monomer butyl acrylate, and continue polymerization for 5 hours After 1 hour, add 30 parts of water and 10 parts ...

Embodiment 2

[0044] Example 2: Poly(styrene-b-n-butyl acrylate-b-styrene) triblock copolymer

[0045] In this example, the RAFT reversible addition-fragmentation chain transfer emulsion polymerization method is used for material preparation, and the preparation method is similar to that in Example 1.

[0046] The specific molecular chain structure of the block copolymer prepared in this example is shown in Table 1, wherein the mass percentage of n-butyl acrylate is 75%, and the total molecular weight is 120,000.

[0047] The solid product prepared above was configured into a 5% tetrahydrofuran solution, poured into a polytetrafluoroethylene watch glass, volatilized to form a film, the heating temperature was 80°C, put it into a vacuum oven after volatilizing for 24 hours, and annealed at 120°C for 24 Hours, a new type of dielectric elastomer film was obtained.

[0048] Performance Testing

[0049] Dielectric constant measurement: the novel dielectric elastomer prepared in this example wa...

Embodiment 3

[0051] Example 3: Poly(styrene-b-n-butyl acrylate-b-styrene) triblock copolymer

[0052] In this example, the RAFT reversible addition-fragmentation chain transfer emulsion polymerization method is used for material preparation, and the preparation method is similar to that in Example 1.

[0053] The specific molecular chain structure of the block copolymer prepared in this example is shown in Table 1, wherein the mass percentage of n-butyl acrylate is 85%, and the total molecular weight is 200,000.

[0054] The solid product prepared above was configured into a 5% tetrahydrofuran solution, poured into a polytetrafluoroethylene watch glass, volatilized to form a film, the heating temperature was 80°C, put it into a vacuum oven after volatilizing for 24 hours, and annealed at 120°C for 24 Hours, a new type of dielectric elastomer film was obtained.

[0055] Performance Testing

[0056] Dielectric constant measurement: the novel dielectric elastomer prepared in this example wa...

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Abstract

The invention discloses an application of a block polymer as a dielectric elastomer. The structural general formula of the block polymer is B-C-D, wherein B and D are independently selected from a styrene homopolymer or a methyl methacrylate homopolymer; C is selected from a butyl acrylate homopolymer, a n-butyl acrylate homopolymer, a n-butyl methacrylate homopolymer, a isobutyl methacrylate homopolymer, a tert-butyl acrylate homopolymer, a 2-ethylhexyl acrylate homopolymer, an iso-octyl acrylate homopolymer, an ethyl acrylate homopolymer or a homopolymer of at least two kinds of butyl acrylate, n-butyl acrylate, n-butyl methacrylate, isobutyl methacrylate, tert-butyl acrylate, 2-ethylhexyl acrylate, iso-octyl acrylate and ethyl acrylate. The block polymer can have larger deformation under high-frequency driving without swelling by a solvent and can be used as the dielectric elastomer.

Description

technical field [0001] The invention relates to the field of dielectric elastomers, in particular to the application of a block polymer as a dielectric elastomer. Background technique [0002] Dielectric Elastomer (DE) is a kind of polymer material that can produce huge deformation under the action of an external electric field. It has many advantages such as high energy density, fast response speed, high energy conversion efficiency, and low operating noise. It is widely used It is used in artificial muscles, micro-robots, energy harvesters, sensors, microfluidic control, Braille display devices, etc. It has broad development prospects in bionic robots, green energy, medicine, aerospace and other fields. [0003] The working principle of the dielectric elastomer is to use the insulating elastomer to deform under the Maxwell force along the thickness direction in the electric field, thereby converting electrical energy into mechanical energy. The dielectric elastomer actuat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L53/00C08F293/00C08J5/18
Inventor 罗英武马子朋冒杰李铁风
Owner ZHEJIANG UNIV
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