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A self-healing elastomer material based on reversible non-covalent bond interaction and its preparation method

An elastomer material and non-covalent bond technology, applied in the field of materials, can solve problems such as poor environmental adaptability, low mechanical strength, and low stability, and achieve the effects of low cost, high safety, and simple preparation process

Active Publication Date: 2020-02-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the low bond energy and low stability of hydrogen bonds, self-healing elastomers based on pure hydrogen bond self-assembly often have low mechanical strength and poor environmental adaptability, and their practical applications are narrow.

Method used

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  • A self-healing elastomer material based on reversible non-covalent bond interaction and its preparation method
  • A self-healing elastomer material based on reversible non-covalent bond interaction and its preparation method
  • A self-healing elastomer material based on reversible non-covalent bond interaction and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Measured amounts of sebacic acid and pentaethylenehexamine were placed in a reactor filled with nitrogen, and reacted at 300° C. for 1 hour to obtain an oligomer polyamide prepolymer. Add calcium hydroxide to the prepolymer, react at 300°C for 1 hour, and cool to room temperature to obtain a self-healing elastomer material. The raw material ratio of sebacic acid, pentaethylenehexamine and calcium hydroxide is measured with the molar ratio of their corresponding carboxyl groups, amino groups and basic metal compounds being 1:0.1:0.1.

[0023] figure 1 Wavenumbers from 1500cm for elastomeric materials -1 to 1680cm -1 The variable temperature infrared spectrum, as the temperature increases from 30°C to 150°C, the stretching vibration frequency of carbonyl-C=O increases from 1643cm -1 Gradually move to 1657cm -1 ; in contrast, the in-plane bending vibration frequency of -NH- in the amide bond is from 1545cm -1 Gradually decrease to 1532cm -1 place. The increase of te...

Embodiment 2

[0027] Measured amounts of suberic acid, oleic acid and triaminobenzene were placed in a reactor filled with nitrogen, and reacted at 150° C. for 18 hours to obtain an oligomer polyamide prepolymer. Add magnesium oxide and calcium hydroxide to the prepolymer, react at 150°C for 12 hours, and cool to room temperature to obtain a self-healing elastomer material. The ratio of raw materials of suberic acid to oleic acid, triaminobenzene, magnesium oxide and calcium hydroxide is measured at a molar ratio of 1:1:1 to the corresponding carboxyl, amino, and basic metal compounds, wherein suberic acid The molar ratio of carboxyl to oleic acid is 1:0.5, and the molar ratio of magnesium oxide to calcium hydroxide is 1:1.

[0028] The elastic material was prepared into a standard dumbbell-shaped sample with a thickness of 1 mm, and the tensile test was performed at a tensile rate of 500 mm / min. The tensile strength of the obtained material was 7.0 MPa, and the elongation at break was 370%...

Embodiment 3

[0030] Measured amounts of pimelic acid and tetraethylenepentamine were placed in a reactor filled with nitrogen, and reacted at 250° C. for 5 hours to obtain an oligomer polyamide prepolymer. Add iron oxide to the prepolymer, react at 200°C for 4 hours, and cool to room temperature to obtain a self-healing elastomer material. The raw material ratio of pimelic acid, tetraethylenepentamine and iron oxide is measured with the molar ratio of the corresponding carboxyl groups, amino groups and basic metal compounds being 1:0.5:0.4.

[0031] Differential scanning calorimetry (DSC) was performed on the prepared materials. The material is first heated from 30°C to 110°C, and kept at a constant temperature for 3 minutes to eliminate the thermal history; then the temperature is cooled to -60°C and then raised to 100°C, and the temperature change rate throughout the test is controlled at 10°C / min. The glass transition temperature of the material obtained from the DSC test curve is -5.5...

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Abstract

The invention discloses a self-healing elastomer material based on reversible noncovalent interaction and a preparation method of the self-healing elastomer material. The preparation method comprisesthe following steps: polyorganic acid containing two or more carboxyl groups and polyamine containing two or more amino groups are fed into a reactor in a nitrogen atmosphere and subjected to a reaction at 30-300 DEG C for 1-36 h, and a polyamide prepolymer as an oligomer is obtained; a basic metal compound is added to the prepolymer, a reaction is performed at 30-300 DEG C for 1-36 h, a viscous material is obtained and cooled to room temperature, and the self-healing elastomer material is obtained. The self-healing elastomer material is a polyamide self-healing material based on double actions of ionic bonds and hydrogen bonds. The material has high elasticity at room temperature; based on reversibility of the ionic bonds and the hydrogen bonds, the material shows self-healing performancecapable of self-repairing mechanical damage and has processability of thermoplastic elastomers.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a self-healing elastomer material based on reversible non-covalent bond interaction and a preparation method thereof. Background technique [0002] During the use of polymer materials, due to the influence of mechanical load and use environment, certain structural damage will occur, resulting in a significant decline in material performance, affecting the safety and sustainability of its use. Natural biological tissues can heal their own wounds or wounds, and have self-healing capabilities that traditional materials do not have. Starting from this idea, new polymer materials that draw on the ability of organisms to self-repair mechanical damage are called self-healing polymer materials. Polymer materials with self-healing ability have important practical significance for enhancing the mechanical strength, reliability and durability of materials and reducing production costs....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/26C08G69/28C08J3/24C08L77/06
CPCC08G69/26C08G69/28C08J3/243C08J2377/06
Inventor 王小萍程炳坤贾德民
Owner SOUTH CHINA UNIV OF TECH
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