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A kind of high-strength self-healing material and its preparation method

A composite material, high-strength technology, applied in the field of biomass-based functional materials, achieves the effects of mild conditions, simple preparation method, and low strength overcoming

Active Publication Date: 2020-04-17
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the mechanical strength of the strongest self-healing material can only reach 6.8MPa (reference: Kim, SM.etal.Superior Toughness and Fast Self-Healing at Room Temperature Engineered byTransparent Elastomers.Adv.Mater.2017 )

Method used

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  • A kind of high-strength self-healing material and its preparation method
  • A kind of high-strength self-healing material and its preparation method
  • A kind of high-strength self-healing material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation of embodiment 1 functional polyamide 1

[0032] Take 100 parts by weight of functional polyamide monomer 1, and 1 part by weight of the second-generation Hoveyda-Grubbs catalyst. Put it into an oil bath at 60°C, and react for 24 hours under the condition of oil pump vacuum to obtain a high-strength self-healing material composed of functional polyamide 1. The specific reaction equation is as follows:

[0033]

[0034] Figure 5 It is the transmission electron microscope picture in Example 1, from which it can be seen that the functional polyamide 1 prepared in Example 1 has a uniformly distributed crystal structure, and most of the crystal sizes are between 30 and 35 nanometers. This result clearly shows the internal microstructure of Example 1, which also confirms the design principle of the present invention, that is, the functional polyamide is designed with rigid nanocrystalline regions, thereby greatly increasing the mechanical properties of th...

Embodiment 2

[0035] The preparation of embodiment 2 functional polyamide 2

[0036] Its preparation method is the same as that of Example 1, except that the functional polyamide monomer selected is Monomer 2. The specific reaction equation is as follows:

[0037]

Embodiment 3

[0038] The preparation of embodiment 3 functional polyamide 3

[0039] Its preparation method is the same as that of Example 1, except that the functional polyamide monomer selected is Monomer 3. The specific reaction equation is as follows:

[0040]

[0041] Such as figure 1 Shown: the amide groups, side chain groups and double bond characteristic peaks of the functional polyamides prepared in Example 1, Example 2 and Example 3 were all characterized in the H NMR spectrum, proving that the monomers were successfully polymerized to form a polymer things.

[0042] Through differential scanning calorimeter test (DSC test), figure 2 It shows that the glass transition temperatures of the functional polyamides prepared in Example 1, Example 2 and Example 3 are 1.7°C, -24.4°C and -8.1°C, respectively. From the low glass transition temperature, it is verified that this kind of functional polyamide has excellent self-healing properties.

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Abstract

The invention relates to a high-strength self-healing material and a preparation method thereof. The high-strength self-healing material adopts a structural formula as follows: FORMULA, wherein a lateral group R1 adopts a structural formula of -OCOR1' or -OH, and n is greater than or equal to 5 and smaller than or equal to 500. The high-strength self-healing material is prepared by polymerizing the same polyamide monomer under vacuum or copolymerizing different polyamide monomers under vacuum. The high-strength self-healing material synthesized by the preparation method provided by the invention has a large number of non-covalent bonds and relatively low glass transition temperature, so that the high-strength self-healing material has excellent autonomous healing ability; moreover, the high-strength self-healing material adopts a unique chemical structure, and has a large number of reversible non-covalent bonds and a large number of uniformly distributed nanocrystalline regions, so that the defect of low strength of an autonomous healing material is overcome.

Description

technical field [0001] The invention belongs to the field of biomass-based functional materials, and in particular relates to a high-strength self-healing material and a preparation method thereof. Background technique [0002] In our daily life, it costs a certain amount of cost to replace parts in damaged parts of equipment, and self-healing materials can partially or completely repair damaged areas, thereby reducing material costs and extending the life of materials. This property of self-healing materials has attracted the attention of scientists over the past few decades. At present, the application fields of self-healing materials mainly include aerospace, automobile, civil and medical engineering and other fields. In general, self-healing materials can be divided into external healing materials and internal healing materials. The external healing mechanism was first proposed by White et al. in 2001. The system consists of microencapsulated dicyclopentadiene embedde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F222/38C08F122/38
CPCC08F122/38C08F222/38
Inventor 汪钟凯吴茫章亚琼宋凌志
Owner ANHUI AGRICULTURAL UNIVERSITY
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