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A kind of ethyl cellulose-based self-healing polymer and preparation method thereof

A technology of ethyl cellulose and polymer, applied in the field of ethyl cellulose-based self-healing polymer and its preparation, can solve the problem of short self-healing time, poor mechanical properties of gel, poor thermal stability and solvent stability, etc. question

Active Publication Date: 2022-07-15
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Self-healing elastomers based on dynamic thermoreversible covalent bonds can self-heal at room temperature or under heating conditions, and the self-healing time is short and efficient, but the strength and mechanical strength of the elastomer are uncontrollable, and they are gel-like or thermosetting polymers. Poor stability and solvent stability
The reversible chemical bond system needs to realize the self-healing of the material through the movement of molecular chain segments. Generally, the prepared elastomer is required to have a low Tg; solvents and plasticizers can promote the movement of molecular chains, which is conducive to self-healing behavior. Some Tg Taller elastomers can also exhibit self-healing properties, but gels have poorer mechanical properties

Method used

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  • A kind of ethyl cellulose-based self-healing polymer and preparation method thereof
  • A kind of ethyl cellulose-based self-healing polymer and preparation method thereof
  • A kind of ethyl cellulose-based self-healing polymer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] 1 g of modified ethyl cellulose containing furan groups and 0.2 g of 4,4'-methylenebis(N-phenylmaleimide) were dissolved in 20 mL of tetrahydrofuran at room temperature, stirred for 20 min and sonicated for 10 min , poured the transparent solution into the mold, placed it at room temperature for 48 hours to evaporate the solvent, placed it in a vacuum drying oven at 100 °C for 12 hours, and then lowered it to room temperature to obtain an ethyl cellulose-based self-healing polymer. The mechanical properties of the obtained ethyl cellulose self-healing polymer are as follows: Figure 4 shown.

Embodiment 2

[0023] 1 g of modified ethyl cellulose containing furan groups and 0.4 g of 4,4'-methylenebis(N-phenylmaleimide) were dissolved in 20 mL of tetrahydrofuran at room temperature, stirred for 20 min and sonicated for 10 min , poured the transparent solution into the mold, placed it at room temperature for 48 hours to evaporate the solvent, placed it in a vacuum drying oven at 100 °C for 12 hours, and then lowered it to room temperature to obtain an ethyl cellulose-based self-healing polymer. The mechanical properties of the obtained ethyl cellulose self-healing polymer are as follows: Figure 4 shown.

Embodiment 3

[0025] Dissolve 1 g of modified ethyl cellulose containing furan groups and 0.6 g of 4,4'-methylenebis(N-phenylmaleimide) in 20 mL of tetrahydrofuran at room temperature, stir for 20 min and sonicate for 10 min , poured the transparent solution into the mold, placed it at room temperature for 48 hours to evaporate the solvent, placed it in a vacuum drying oven at 100 °C for 12 hours, and then lowered it to room temperature to obtain an ethyl cellulose-based self-healing polymer. The mechanical properties of the obtained ethyl cellulose self-healing polymer are as follows: Figure 4 shown.

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Abstract

An ethyl cellulose-based self-healing polymer and a preparation method thereof, which utilizes modified ethyl cellulose containing furan groups and 4,4'-methylenebis(N-phenylmaleyl imine) prepared by the Diels-Alder reaction. Thermoreversible Diels-Alder (DA) bonds can be introduced into self-healing polymers by adjusting the content of 4,4'-bismaleimidodiphenylmethane to obtain polymers with different mechanical properties and self-healing properties Material. Surface cracks in the polymer material can be repaired by heating, and the damaged material can be recycled through a thermoplastic process.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to an ethyl cellulose-based self-repairing polymer and a preparation method thereof. Background technique [0002] Self-healing material is a new type of intelligent material that has emerged in the past ten years. It can realize the spontaneous detection and repair of material damage, thereby preventing the potential damage of materials due to microscopic damage, prolonging the service life of products and increasing the number of products. It has broad application prospects in the fields of microelectronic polymer devices, human joints, and interface electrical and thermal conductivity materials. For most self-healing materials, it is difficult to balance the mechanical properties and self-healing properties of the material. Usually, materials with good mechanical properties (that is, high strength) are difficult to have self-healing properties, while materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B15/06
CPCC08B15/06
Inventor 贾普友周永红胡立红刘承果张猛薄采颖宋飞
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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