Self-repair material and article with shape memory effect and preparation method thereof

A technology of self-healing materials and memory effects, which is applied in the field of self-healing materials and their preparation, can solve the problems of limited application, few research reports on self-healing of shape memory materials, and lack of self-healing functions. The effect of diversified methods and convenient operation

Inactive Publication Date: 2017-05-10
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the traditional shape memory polymers do not have self-healing function, which greatly limits their applicatio

Method used

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  • Self-repair material and article with shape memory effect and preparation method thereof
  • Self-repair material and article with shape memory effect and preparation method thereof
  • Self-repair material and article with shape memory effect and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057] Example 1

[0058] Weigh 20g of polylactic acid (PLA) and dissolve it in 60ml of chloroform under magnetic stirring. To form a homogeneous and transparent system, add 80g of sodium chloride (as a porogen) to the system, mix well, and cast into a film. After drying for 48 hours at room temperature, take out vacuum drying for 24 hours, then soak the film in ultrapure water for 2 hours, rinse with ultrapure water, repeat this step three times, and then dry the film at room temperature to obtain a polymer with microporous structure inside. Lactic acid shape memory polymer (that is, self-healing material with shape memory effect). The self-healing material with shape memory effect of the present invention has a porosity of 85%, a glass transition temperature of Tg=60°C, a shape fixation rate of 90%, and a shape recovery rate of 92%. The material is at 70°C The self-repair time is 10 minutes.

Example Embodiment

[0059] Example 2

[0060] Weigh 10g of ethylene-vinyl acetate copolymer (EVA, Sigma), add it to water to prepare an emulsion with a solid content of 30%, and place the above emulsion in a freeze-drying equipment for 72 hours to obtain the present invention A self-healing material with shape memory effect. The self-healing material has a microporous structure inside, a porosity of 90%, a glass transition temperature of Tg=40°C, a shape fixation rate of 91%, and a shape recovery rate of 90%. The repair time of the self-healing material at 60°C is 15 minutes.

Example Embodiment

[0061] Example 3

[0062] 3 g of polyglycolic acid (PGA) was added to 20 g of dimethylamide (DMF), and mechanically stirred until the solution was transparent and an electrostatic spinning solution was obtained. Load the prepared spinning solution into the liquid storage device, apply a spinning voltage of 20KV between the spinning needle and the receiving device, control the spinning distance between the spinning needle and the receiving aluminum foil to 13cm, and adjust the flow rate of the polymer solution to 0.01mL / min, the inner diameter of the spinning needle is 0.9mm, the spinning temperature is 25°C, and the air humidity is 53%. The self-healing material with shape memory effect of the present invention can be obtained through the electrospinning technology.

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Abstract

The invention discloses a self-repair material with a shape memory effect. The self-repair material is prepared from a shape memory polymer material, a shape memory function can be achieved under the stimulation of light, heat, electricity and magnetism, and moreover, the self-repair and healing purposes are achieved. The composition and preparation method of the self-repair material are diversified, the shape change and self-repair functions of the shape memory material can be achieved through different manners, and the application of the shape memory material in the fields such as spaceflight, aviation, medical treatment and bioengineering is expanded.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a self-repairing material with shape memory effect and a preparation method thereof. Background technique [0002] Shape memory polymer is a kind of functional or intelligent polymer. When the initial shape obtained by one-time molding is processed into a temporary shape, it can "remember" the original shape and restore the original shape under the action of external stimuli. Shape, using its shape memory function, shape memory polymers can be widely used in structural connectors, packaging materials, printing materials, medical and other fields. [0003] With the in-depth research and wide application of shape memory polymers, the requirements for shape memory polymers are getting higher and higher. Existing research on shape memory polymers is mainly focused on improving their thermal and mechanical properties, and there are few studies on the functional properties of material...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L71/02C08J5/18C08J9/28C08L23/08D01F6/62C08J7/04C08G81/00C08L87/00C08K3/08A61L27/56A61L27/50A61L31/14
CPCA61L27/50A61L27/56A61L31/14A61L31/146A61L2400/16C08G81/00C08J5/18C08J7/0427C08J9/28C08J2323/08C08J2367/04C08J2379/08C08J2387/00C08J2467/04C08J2471/02C08K3/08C08K2003/0831C08K2201/011C08L23/0853C08L67/04C08L87/00C08L2201/12C08L2203/14D01F6/625C08L71/02
Inventor 杜学敏王娟崔欢庆
Owner SHENZHEN INST OF ADVANCED TECH
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