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Three-dimensional graphene-shape memory polymer composite material and preparation method thereof

A memory polymer and composite material technology, applied in the field of shape memory materials, can solve the problems of poor controllability of conductivity, not easy to bend, low efficiency, etc., achieve strong strain resistance and conductivity, fast shape recovery speed, low The effect of stabilizing resistance characteristics

Active Publication Date: 2022-04-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation methods of these shape memory polymers and conductive materials have the disadvantages that the conductive phase is difficult to disperse uniformly and the conductivity is poorly controllable. It will make the composite material hard and not easy to bend, which is not conducive to the control of the overall mechanical properties of the composite material
[0006] Literature "Shivakumar R, Leong FN, Tsang SH, Teo EHT. Effect of loadingfraction of three-dimensional graphene foam (3D-C) on thermal, mechanical, and shape memory properties of 3D-C / SMP composite. Materials ResearchBulletin. 2021; 142” discloses a method for preparing composite conductive materials using three-dimensional graphene and shape memory polymers, but the material is heated by a heating plate, which is inefficient and is also not conducive to the promotion and application of composite materials

Method used

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  • Three-dimensional graphene-shape memory polymer composite material and preparation method thereof
  • Three-dimensional graphene-shape memory polymer composite material and preparation method thereof
  • Three-dimensional graphene-shape memory polymer composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1. Three-dimensional graphene-shape memory polymer composites

[0049] 1) The growth of three-dimensional graphene: use the metal foam pressed by 3 layers of nickel foam as the template, adjust the universal testing machine to the compression mode, set the compression force to 4KN, and perform vapor phase chemical deposition growth on the compressed template: growth temperature 1000°C, methane flow rate 30 sccm, hydrogen flow rate 10 sccm, growth time 30 min, and then cooled to room temperature, the three-dimensional graphene grown on the nickel foam template was obtained.

[0050] The growth method is a conventional three-dimensional graphene growth preparation method (as disclosed in the document "J.M. Blocher Jr., Structure / property / process relationships in chemical vapor deposition CVD, J.Vac. Sci. Technol. 11 (1974) 680-686" Reported method), the number of three-dimensional graphene layers obtained in this embodiment is 3-5 layers, and the conductivity is 8s / cm.

...

Embodiment 2

[0064] The basic preparation method of this embodiment is the same as that of Example 1, the difference is that the number of layers of three-dimensional graphene is 3-5 layers, the conductivity is 7.5s / cm, and the etching solution used in this embodiment is 1mol / L super Ammonium sulfate solution, the etching temperature is 75° C., the etching time is 10 h, and the thickness of the memory polymer prepared in this embodiment is 0.2 cm.

[0065] In this embodiment, the output voltage of the DC stabilized power supply is 20V, and the recovery time is 18S, such as Figure 5 As shown, the shape recovery rate is 100%, and the shape fixation rate is 99.5%.

[0066] Figure 5 Among them, A and B are the photos of the composite material prepared in this example before deformation and after deformation, respectively.

Embodiment 3

[0068] This embodiment is basically the same as Embodiment 1, except that the number of three-dimensional graphene layers is 3-6, the conductivity is 6.9 s / cm, the length of the composite material is 7 cm, and the thickness of the polymer is 0.2 cm.

[0069] In this embodiment, the output voltage of the DC stabilized power supply is 20V, and the recovery time is 8S, such as Image 6 As shown, the shape recovery rate is 100%, and the shape fixation rate is 99.5%.

[0070] Image 6 Among them, A and B are the photos of the composite material prepared in this example before deformation and after deformation, respectively.

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Abstract

The invention relates to a three-dimensional graphene reinforced shape memory composite material and a preparation method thereof. The composite material is structurally composed of a three-dimensional graphene network, a shape memory polymer base material wrapping the outer side of the three-dimensional graphene network and electrodes at the two ends of three-dimensional graphene. The shape memory polymer base material is obtained by mixing epoxy resin E51, alicyclic epoxy resin E73, aminoethyl piperazine and polysulfide rubber, and the three-dimensional graphene network is prepared based on a vapor phase chemical deposition method; the composite material has good electric conduction and heat conduction performance and stable and controllable electric drive shape recovery, and shape recovery drivability and application convenience are greatly improved.

Description

technical field [0001] The invention relates to the field of shape memory materials, in particular to a three-dimensional graphene-shape memory polymer composite material and a preparation method thereof. Background technique [0002] Shape memory polymer is a shape memory material with shape memory function, which can be repeatedly deformed between permanent shape and temporary shape. Conventional shape memory polymers are deformed by heating them to the glass transition temperature. [0003] Early shape memory polymers can be traced back to radiation cross-linked polyethylene in the 1960s, and then gradually developed into a broad family of polymers such as epoxy resins, polylactic acid, polyurethane, polynorbornene, styrene, cyanate esters, etc. . The best comprehensive properties are epoxy resin and polyurethane. Polyurethane is widely used because of its plasticity, and epoxy resin is widely studied because of its excellent mechanical properties, shape memory properti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08L63/00C08L81/04C08K3/04
CPCC08L63/00C08K2201/001C08L2201/12C08L81/04C08K3/042
Inventor 周建新周玉成戎家胜胡聪胡俊斌刘梦然
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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