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Energy absorption method and uses thereof

A dynamic, covalent cross-linking technology for energy absorption

Inactive Publication Date: 2019-04-23
翁秋梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These structures for energy absorption are often a simple superposition of the above-mentioned mechanisms. Compared with the single above-mentioned mechanism, although the energy absorption range has been expanded to a certain extent and the energy absorption efficiency has been improved, its shortcomings cannot be avoided.

Method used

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  • Energy absorption method and uses thereof
  • Energy absorption method and uses thereof
  • Energy absorption method and uses thereof

Examples

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preparation example Construction

[0389] The preparation method of a kind of dynamic polymer ionic liquid gel of the present invention comprises the following steps: adding the raw material for preparing the dynamic polymer into the ionic liquid so that the mass fraction of the prepared dynamic polymer is 0.3-75%. Said appropriate means carry out covalent cross-linking, and after the reaction is finished, a dynamic polymer ionic liquid gel is produced. Another method for preparing a dynamic polymer ionic liquid gel of the present invention comprises the following steps: swelling the dynamic polymer in a solvent containing an ionic liquid so that the mass fraction of the prepared dynamic polymer is 0.3-75%, After fully swelling, the solvent is removed to form a dynamic polymer ionic liquid gel. The above-mentioned ionic liquid is generally composed of organic cations and inorganic anions. As an example, the cations are selected from the group consisting of but not limited to alkyl quaternary ammonium ions, alky...

Embodiment 1

[0397]

[0398] The specific process is as follows:

[0399] Using methanol as a solvent and sodium methoxide as a catalyst, mix mercaptoethanol and 3-chloro-2-chloromethyl-1-propene at a molar ratio of 2:1, and react under heating for 16 hours to obtain 2,2′-[ (2-methylene-1,3-propanediyl)di(sulfur)]diethanol; using tetrahydrofuran as a solvent and triethylamine as a catalyst, 2,2'-[(2-methylene-1, 3-propanediyl)di(thio)]diethanol is reacted with acryloyl chloride, and the reaction temperature is controlled at 0-25°C to synthesize a diene compound containing an allyl sulfide group.

[0400] In the reactor, add butyl acrylate with a molar ratio of 10:1, the above-mentioned diene compound containing allyl sulfide group, take tetrahydrofuran as a solvent, and azobisisobutylnitrile (AIBN) as an initiator, Under anaerobic conditions, react at 65°C for 12 hours to obtain a polymer fluid with a certain viscosity; then take 100 parts by mass of the polymer liquid and swell it in ...

Embodiment 2

[0403]

[0404] The specific steps for preparing an ionic liquid gel are as follows:

[0405] Diallyl adipate and di-2-propenyl trithiocarbonate will be added to 1-butyl-3-methylimidazolium hexafluorophosphate ([C 4 MIM]PF 6 ) in the ionic liquid, then add the cross-linking agent pentaerythritol tetrakis (3-mercaptopropionate) relative to the monomer 0.1~20wt% and a small amount of BHT antioxidant and the photoinitiator relative to the monomer 0.05~0.55wt% Benzoin dimethyl ether (DMPA), after stirring and mixing thoroughly, pour it into a glass plate mold with a silica gel gasket, and put it in an ultraviolet crosslinking instrument for 8 hours of ultraviolet radiation to obtain a high elongation and elastic mold. Dynamic polymer gels with tunable amounts of ionic liquids.

[0406] The modulus of the ionic liquid gel prepared in this example is 25kPa, the elongation at break can reach 6 times, and the stress at break is 45kPa. This ionic liquid gel has good stability and ...

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Abstract

The invention discloses an energy absorption method, which is characterized in that a dynamic polymer having dynamic covalent cross-linking and optional supramolecular hydrogen bond action is used asan energy absorbing material for energy absorption, wherein the dynamic covalent cross-linking is based on at least a reversible addition cleavage chain transfer dynamic covalent bond. According to the present invention, the dynamic polymer completely uses the characteristics of the dynamic covalent bond, such that the polymer has a certain strength and a certain stability; the dynamic covalent bond has strong dynamic reversibility under a certain condition, such that the dynamic polymer has characteristics of energy dissipating, dispersing and energy absorbing, can be used as the energy absorbing material so as to provide functions of good damping, good shock absorption, good sound insulation, good noise reduction, good impact resistance and the like, and can be especially used in body protection in sports and daily life and work, military and police body protection, explosion prevention, bullet prevention, airborne protection, airdrop protection, vehicle collision prevention, anti-impact protection of electronic and electrical products, and other fields.

Description

technical field [0001] The present invention relates to a method of energy absorption, in particular to an energy absorption method based on dynamic polymers composed of dynamic covalent crosslinks and optional supramolecular hydrogen bonding. Background technique [0002] In daily life, sports, entertainment, military, police, security, medical care, production and other activities, human bodies, animal bodies and objects are often severely affected by physical shocks such as impacts, vibrations, shocks, explosions, and sounds. By using energy-absorbing materials for energy absorption, this type of physical impact can be effectively protected and alleviated. These energy absorption methods are divided into active energy absorption and passive energy absorption. Active energy absorption includes methods such as the use of shock absorbers, and passive energy absorption includes methods such as the use of materials with energy-absorbing functions. The materials used for ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24
CPCC08J3/24C08J3/243C08J3/246C08J2335/00C08J2335/02C08J2341/00C08J2391/00C08J2435/00C08J2435/02C08J2441/00C08J2491/00
Inventor 不公告发明人
Owner 翁秋梅
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