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Deep-eutectic solvent capable of dissolving polyethylene glycol and dissolving method thereof

A low eutectic solvent, polyethylene glycol technology, applied in the field of new green solvents, can solve the problems of high cost, complex synthesis process of alkyl ammonium bromide salt, toxic raw materials, etc., and achieves adjustable properties, low toxicity, A stable effect

Active Publication Date: 2018-08-21
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis process of alkylammonium bromide salts is complex, the raw materials are toxic, and the cost is relatively expensive
People such as Zhang Hongmei have reported that tetrabutylammonium chloride, tetrabutylammonium bromide, tetraethylammonium chloride and tetraethylammonium bromide and molecular weight are the polyethylene glycol of 200-4000 to form deep eutectic solvent for Aqueous two-phase separation of RNA is efficient, but the synthesis process of the deep eutectic solvent requires the addition of a small amount of deionized water

Method used

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  • Deep-eutectic solvent capable of dissolving polyethylene glycol and dissolving method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Polyethylene glycol (Mw=200 / 1000 / 6000 / 20000) was dissolved in a zinc chloride-ethylene glycol deep eutectic solvent with a molar ratio of 1:2

[0022] Weigh a certain amount of medicine according to the molar ratio of zinc chloride-ethylene glycol as 1:2 and add it into a 100mL screw bottle, and place the screw bottle in an oven at 373.15K until a uniform, clear and transparent liquid is formed. It is a deep eutectic solvent; after cooling, add polyethylene glycols of different mass fractions and molecular weights to the formed deep eutectic solvent, heat continuously in a 333.15K oven, and shake the screw bottle properly until uniform A clear solution was formed, which was stable at room temperature. Polyethylene glycol (Mw=200) can be miscible with zinc chloride-ethylene glycol (1:2) in any ratio, soluble polyethylene glycol (Mw=1000) 40wt%, polyethylene glycol (Mw=6000) 34wt%, polyethylene glycol (Mw=20000) 30wt%.

Embodiment 2

[0023] Example 2: Polyethylene glycol (Mw=200 / 1000 / 6000 / 20000) was dissolved in a zinc chloride-ethylene glycol deep eutectic solvent with a molar ratio of 1:4

[0024] According to the zinc chloride-ethylene glycol molar ratio of 1:4, weigh a certain amount of medicine and add it to a 100mL screw bottle. Place the screw bottle in an oven at 373.15K until a uniform clear and transparent liquid is formed, which is the deep eutectic solvent; after cooling, add different mass fractions and molecular weight polyethylene For diol, keep heating in an oven at 333.15K, shake the screw bottle properly until a uniform and transparent solution is formed, and the solution is stable at room temperature. Polyethylene glycol (Mw=200) can be miscible with zinc chloride-ethylene glycol (1:4) in any ratio, soluble polyethylene glycol (Mw=1000) 22wt%, polyethylene glycol (Mw=6000) 16wt%, polyethylene glycol (Mw=20000) 13wt%.

Embodiment 3

[0025] Example 3: Polyethylene glycol (Mw=200 / 1000 / 6000 / 20000) was dissolved in a zinc chloride-ethylene glycol deep eutectic solvent with a molar ratio of 1:6

[0026] According to the zinc chloride-ethylene glycol molar ratio of 1:6, weigh a certain amount of medicine and add it to a 100mL screw bottle, and place the screw bottle in a 373.15K oven until a uniform, clear and transparent liquid is formed. It is a deep eutectic solvent; after cooling, add polyethylene glycols of different mass fractions and molecular weights to the formed deep eutectic solvent, heat continuously in a 333.15K oven, and shake the screw bottle properly until uniform A clear solution was formed, which was stable at room temperature. Polyethylene glycol (Mw=200) can be miscible with zinc chloride-ethylene glycol (1:6) in any ratio, soluble polyethylene glycol (Mw=1000) 11wt%, polyethylene glycol (Mw=6000) 6wt%, polyethylene glycol (Mw=20000) 5wt%.

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Abstract

The invention discloses a deep-eutectic solvent capable of dissolving polyethylene glycol and a dissolving method thereof. The deep-eutectic solvent takes zinc chloride as a hydrogen bond acceptor andtakes ethylene glycol as a hydrogen bond donor. The deep-eutectic solvent disclosed by the invention can dissolve the polyethylene glycol at a high solubility in a water-free environment. Raw materials of the deep-eutectic solvent disclosed by the invention are low in cost, easily obtained and are toxic-free and harmless; the dissolving method is simple, high-efficiency, green and environment-friendly; a polyethylene glycol-zinc chloride-ethylene glycol system has a good application prospect in the aspects of catalysis, phase transfer, electrochemistry and the like, and is particularly suitable for the application with the requirement on water-free conditions.

Description

technical field [0001] The invention relates to a novel green solvent capable of dissolving macromolecules, in particular to a deep eutectic solvent capable of dissolving polyethylene glycol and a dissolving method thereof. Background technique [0002] Solvents capable of dissolving polymers are the basis for solution processing of polymer materials. Polymer processing in green solvents is an important development direction in the field of materials processing. [0003] In recent years, a green solvent-deep eutectic solvent has the advantages of simple synthesis, adjustable properties, non-volatility, stable properties, low toxicity and reproducibility, and is gradually becoming an important solvent choice in solution processing of polymer materials. However, there are few published reports on deep eutectic solvents capable of dissolving synthetic polymers, severely hindering the development of this field. Chen Zhengfei and others reported that polyethylene glycol was dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/09C08L71/02
CPCC08J3/095C08J2371/02
Inventor 刘昆刘训伟程震蒲明东
Owner HEFEI UNIV OF TECH