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A self-healing elastomer material and a preparing method thereof

An elastomer material and self-healing technology, applied in the field of materials, to achieve the effects of low preparation cost, high healing efficiency, and high strength healing efficiency

Active Publication Date: 2017-08-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent application document CN 103333346 A describes a method of using molecules with amino and amide groups to prepare elastomeric materials with rubber elasticity and self-healing properties, which form a physical cross-linked network only through intermolecular hydrogen bonds Achieve self-healing effect, which limits its application to a certain extent

Method used

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  • A self-healing elastomer material and a preparing method thereof
  • A self-healing elastomer material and a preparing method thereof
  • A self-healing elastomer material and a preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Place the metered amount of methyl methacrylate, ethylenediamine and diethylenetriamine in a reactor filled with methanol, and the molar ratio of methyl methacrylate to ethylenediamine and diethylenetriamine is 1:0.1:0.1 , the mass ratio of methyl methacrylate to methanol is 1:1, react at 50°C for 1 hour to obtain a prepolymer. The prepolymer was placed in a rotary evaporator to remove the organic solvent methanol, and then reacted at 50° C. for 10 h to obtain a hyperbranched polyamidoamine (HPAMAM) with amino groups at the end of the molecular chain. The amine value of HPAMAM was determined to be 8.21 mmol / g by acid-base titration. Then add HPAMAM, sebacic acid and magnesium hydroxide into the reactor, and measure it with the molar ratio of the corresponding amino group, carboxyl group and basic metal compound as 1:0.2:0.1, and react at 100°C for 24h under nitrogen atmosphere to obtain Self-healing elastomeric materials based on hyperbranched polyamidoamines.

[0028...

Embodiment 2

[0032]The measured lauryl methacrylate and triaminobenzene are placed in a reactor equipped with ethanol, the mol ratio of lauryl methacrylate and triaminobenzene is 1:1, and the mass ratio of lauryl methacrylate to ethanol is 1:10, react at -10°C for 72h to obtain a prepolymer. The prepolymer was placed in a rotary evaporator to remove the organic solvent ethanol, and then reacted at 80°C for 8 hours to obtain a hyperbranched polyamidoamine (HPAMAM) with amino groups at the end of the molecular chain. The amine value of HPAMAM was determined to be 7.05 mmol / g by acid-base titration. Then add HPAMAM, suberic acid and calcium oxide into the reactor, measure with the molar ratio of the corresponding amino group, carboxyl group and basic metal compound as 1:1:0.5, and react at 120°C for 20h under nitrogen atmosphere to obtain Hyperbranched polyamidoamine self-healing elastomeric materials.

[0033] The elastic material was hot-pressed for 10 minutes to prepare a standard dumbbe...

Embodiment 3

[0035] Place the metered acrylic acid / methyl acrylate mixture and triethylenetetramine in a reactor filled with ethanol, the molar ratio of acrylic acid, methyl acrylate and triethylenetetramine is 0.5:0.5:10, the acrylic acid / methyl acrylate mixture The mass ratio with ethanol is 1:20, react at 10°C for 36h to obtain a prepolymer. The prepolymer was placed in a rotary evaporator to remove the organic solvent ethanol, and then reacted at 100° C. for 6 hours to obtain a light yellow sticky substance, which was hyperbranched polyamidoamine (HPAMAM) with amino groups at the end of the molecular chain. The amine value of HPAMAM was determined to be 8.76 mmol / g by acid-base titration. Then add HPAMAM, pimelic acid and aluminum hydroxide into the reactor, and measure it with the molar ratio of the corresponding amino group, carboxyl group and basic metal compound as 1:10:1, and react at 200°C for 1h under nitrogen atmosphere to obtain Self-healing elastomeric materials based on hyp...

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Abstract

A self-healing elastomer material and a preparing method thereof are disclosed. The method includes (1) reacting a first component containing a double bond and an ester group or carboxyl and a second component containing two or more amino groups at a temperature ranging from -15 DEG C to 50 DEG C for 1-72 h to obtain a prepolymer, removing an organic solvent, and then reacting the mixture at 25-200 DEG C for 1-12 h to obtain hyperbranched polyamidoamine (HPAMAM) having an amino molecular chain tail end; and (2) reacting the HPAMAM, polybasic acid and an alkaline metal compound which are metered at 100-200 DEG C for 1-24 h to obtain the self-healing elastomer material. The functional material synthesized based on the hyperbranched polyamidoamine is a hyperbranched material formed by self-assembling of hydrogen bonds and ionic bonds. The material has elasticity at room temperature. As reversible hydrogen bonds and ionic bonds exist, the material has a property that the material is self-healing at room temperature, is thermoplastic and can be repeatedly processed.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a self-healing elastomer material and a preparation method thereof. Background technique [0002] During the use of polymer materials, they will inevitably be subjected to external stress, impact, puncture, etc., resulting in damage such as micro-cracks inside the material, and even visible cracks and trauma on the surface of the material, resulting in a significant decline in material performance, resulting in The material life is greatly reduced, the occurrence of dangerous events, environmental pollution, waste of resources and other consequences. Therefore, it is important to prepare polymer materials with self-healing ability to enhance the mechanical strength, reliability and durability of materials and reduce production costs by learning from the natural organisms to achieve the healing process of their own wounds or wounds through a certain mechanism. Significance, i...

Claims

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Application Information

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IPC IPC(8): C08L79/02C08G73/02
Inventor 王小萍方凯程炳坤贾德民
Owner SOUTH CHINA UNIV OF TECH
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