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Hybrid dynamic polymer containing reversible free radical type dynamic covalent bonds and application thereof

A dynamic covalent bond and free radical technology, applied in the field of intelligent polymers, can solve problems such as poor dynamic reversibility, difficult recycling and regeneration, and harsh dynamic transformation conditions

Pending Publication Date: 2020-07-07
厦门逍扬运动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the hydrogen bond is a weak interaction, it is difficult to combine self-healing and high mechanical properties with only the hydrogen bond, which greatly limits its application range.
Another example is to introduce dynamic covalent bonds with dynamic reversibility into polymers to obtain polymer materials with self-healing properties, reprocessability and good mechanical strength, but the dynamic covalent structures are often There are problems such as harsh dynamic transition conditions, poor dynamic reversibility, and single dynamic performance, which bring great difficulties to practical applications.
[0004] Although the introduction of these dynamic structures can alleviate the problems of polymer materials that cannot be self-repaired and difficult to recycle and regenerate to a certain extent, they cannot completely get rid of the above problems due to their own structure and performance defects.

Method used

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  • Hybrid dynamic polymer containing reversible free radical type dynamic covalent bonds and application thereof
  • Hybrid dynamic polymer containing reversible free radical type dynamic covalent bonds and application thereof
  • Hybrid dynamic polymer containing reversible free radical type dynamic covalent bonds and application thereof

Examples

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preparation example Construction

[0514] In the preparation process of dynamic polymer, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam it.

[0515] Among them, the mechanical foaming method is to introduce a large amount of air or other gases into the emulsion, suspension or solution of the polymer with the help of strong stirring during the preparation of the dynamic polymer to make it a uniform foam, and then through physical Or chemical changes make it shape and become a foam material. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[0516] Wherein, the physical foaming method is to use physical principles to realize the foaming of the polymer during the preparation of the dynamic polymer, which includes but not limited to the following methods: (1) inert gas foaming method, that is, after adding Press the inert gas into the molten polymer or pasty material under pressure, and then increase the te...

Embodiment 1

[0527]

[0528] Using azobisisobutyronitrile as an initiator and N-(2-amino-2-oxoethyl)acrylamide as a monomer, under a nitrogen atmosphere, stir and react at 70°C for 24 hours to prepare an acrylamide homopolymer (a), it is dried and ground to obtain hydrogen-bonded cross-linked polymer particles. Take 5 molar equivalents of hydroxyl double-terminated polybutadiene (b), 2.5 molar equivalents of compound (c), and 5 molar equivalents of compound (d), put them in a reaction vessel, dissolve them with an appropriate amount of tetrahydrofuran, and add 30 molar equivalents of dicyclohexyl Carbodiimide, 5 moles of single-quantity 4-dimethylaminopyridine, then stirred at room temperature for 24 hours, then added 30wt% hydrogen-bonded cross-linked polymer particles, 0.8wt% nano-palladium, 0.5wt% carbon nanotubes, 0.3wt% Composite antibacterial agent KHFS-ZN, 0.3wt% dispersant N, mixed evenly, poured the product into a mold, first dried naturally for 24 hours, and then dried in a va...

Embodiment 2

[0530]

[0531] Take 3.5 molar equivalents of hydroxyl-terminated four-armed polyethylene glycol (molecular weight: 5000) and 7 molar equivalents of compound (a), place them in a reaction vessel, dissolve them with an appropriate amount of tetrahydrofuran, then add an appropriate amount of stannous octoate catalyst, and then After reacting for 6 hours, hydrogen-bonded cross-linked polyethylene glycol was obtained. Get 10 molar equivalents of polyoxypropylene diamine (b) (molecular weight is 2000), 5 molar equivalents of compound (c), 20 molar equivalents of 1-ethyl-3-(3-dimethylaminopropyl)-carbodiethylene Amine, 4 molar equivalents of 4-dimethylaminopyridine, placed in a reaction vessel, dissolved with an appropriate amount of tetrahydrofuran, then stirred at room temperature for 8 hours, added 50wt% hydrogen-bonded cross-linked polyethylene glycol, 180wt% polyethylene glycol oligomerized substance, 5wt% nano-silver antibacterial solution, 5wt% liquid metal gallium, after ...

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Abstract

The invention discloses a hybrid dynamic polymer containing reversible free radical type dynamic covalent bonds. The hybrid dynamic polymer contains at least one reversible free radical type dynamic covalent bond and at least one hydrogen-bond interaction; based on dynamic reversible characteristics of reversible free radical type dynamic covalent bonds and hydrogen-bond interaction, the hybrid dynamic polymer material is endowed with good self-repairing performance, reprocessability, recoverability and the like, so that the hybrid dynamic polymer material is widely applied to self-repairing materials, ductile materials, shape memory materials, thermal insulation materials, toy materials, energy storage device materials, organic heat-sensitive materials, temperature sensing materials and the like.

Description

technical field [0001] The invention relates to the field of intelligent polymers, in particular to a hybrid dynamic polymer containing reversible free radical dynamic covalent bonds and an application thereof. Background technique [0002] Traditional polymer materials cannot be repaired after damage such as cracks or breaks occurs during use, which is likely to cause problems such as short service life of the material and high cost of recycling and reprocessing; while traditional cross-linked polymer materials cannot be reshaped after preparation and molding. Chemical processing and recycling will cause serious waste of resources and environmental pollution. Therefore, many researchers have introduced dynamic covalent structures and supramolecular interactions into polymer systems to solve the above problems. [0003] For example, the introduction of hydrogen bond groups into polymers, based on the supramolecular dynamics of the hydrogen bonds formed by them, can exchange...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08G83/00
CPCC08J3/24C08G83/008
Inventor 不公告发明人
Owner 厦门逍扬运动科技有限公司
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