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Energy absorption method based on hybrid dynamic polymer

A hybridization, polymer technology, applied in the field of energy absorption

Inactive Publication Date: 2020-07-07
翁秋梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 based on hybrid dynamic polymer
  • Energy absorption method based on hybrid dynamic polymer
  • Energy absorption method based on hybrid dynamic polymer

Examples

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preparation example Construction

[0152] In the preparation process of dynamic polymer foam materials, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam dynamic polymers.

[0153] 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.

[0154] 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 press...

Embodiment 1

[0221] Under nitrogen protection, 2 parts by mass of selenium powder and 2.5 parts by mass of 2-bromoethylamine were added to 100 parts by mass of DMSO solution, stirred for 10 min under magnetic stirring, and then 5 mL of 0.05 mol / L nano-CuO potassium hydroxide solution was added , slowly raised the temperature to 90°C, and the reaction process was monitored by TLC. After 24 hours of reaction, the product was cooled, and then purified to obtain diamine ethyl diselenide; in No. 1 reactor, take 1 molar equivalent of seaweed Dissolve NaIO in sufficient deionized water, then add 1 molar equivalent of NaIO 4 , after stirring at room temperature in the dark for 6 hours, add 1 molar equivalent of ethylene glycol and continue stirring for 2 hours. After dialysis and rotary evaporation, sodium alginate with a theoretical oxidation degree of about 50% is obtained; in No. 2 reactor, add 3 parts by mass of Dissolve sodium alginate with a theoretical oxidation degree of about 50% in a suf...

Embodiment 2

[0223] Under the protection of nitrogen, 1 mass part of selenium powder was added to 50 mass parts of aqueous solution dissolved with 1 mass part of sodium borohydride, stirred for 10 min under magnetic stirring, then 1 mass part of selenium powder was added, and after continuing to stir for 15 min, slowly Raise the temperature until the selenium powder is completely dissolved to obtain a brown-red aqueous solution of sodium selenide; the aqueous solution of sodium selenide is transferred to a single-necked flask and sealed with a rubber stopper; A part of tetrahydrofuran solution was injected into a sealed single-necked flask under nitrogen protection, reacted at 50°C for 6h, then extracted three times with dichloromethane, and dried with anhydrous sodium sulfate to obtain a yellow transparent liquid bis-hydroxyethyl diselenide; 4.9 parts by mass of 1,6-hexamethylene diisocyanate and 0.01 molar equivalent of triethylamine were added to reactor No. 1, and after the temperature ...

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Abstract

The invention discloses an energy absorption method based on a hybrid dynamic polymer. According to the method, the hybrid dynamic polymer containing a dynamic double-selenium bond and optional supramolecular hydrogen-bond interaction is used as an energy absorption material for energy absorption. The dynamic polymer combines respective advantages of a dynamic covalent bond and an optional supramolecular hydrogen bond; the dynamic covalent bond endows the polymer with certain strength and stability; and with the supramolecular hydrogen-bond interaction and strong dynamic reversibility of the dynamic covalent bond under certain conditions, the dynamic polymer has energy absorption characteristics such as energy dissipation and dispersion. The dynamic polymer can be applied to body protection in sports and daily life, military police body protection, explosion prevention, airborne landing and airdrop protection, automobile collision prevention, impact resistance protection of electronicand electrical products and the like.

Description

technical field [0001] The invention relates to an energy absorbing method, in particular to an energy absorbing method based on a hybrid dynamic polymer composed of dynamic double selenium bonds and optional supramolecular hydrogen bond interactions. 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 ...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08G83/00
CPCC08G83/008C08J3/24C08J3/246
Inventor 不公告发明人
Owner 翁秋梅
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