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Biodegradable crosslinking polymer electrolyte membrane and preparation method thereof

An electrolyte membrane, biodegradable technology, applied in circuits, electrical components, battery pack components, etc., can solve the problems of non-biodegradability, environmental pollution, etc., and achieve the effects of simple method, no environmental pollution, and good thermal stability.

Inactive Publication Date: 2013-04-10
WUHAN TEXTILE UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its disadvantage is that it is not biodegradable and will inevitably cause certain pollution to the environment.

Method used

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  • Biodegradable crosslinking polymer electrolyte membrane and preparation method thereof

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preparation example Construction

[0021] A method for preparing a biodegradable cross-linked polymer electrolyte membrane, the method for preparing a biodegradable cross-linked polymer electrolyte membrane comprises the following steps:

[0022] a Preparation of electrolyte solution: weigh LiI and I in a molar ratio of 10:1 2 , and then the weighed LiI and I 2 Both are dissolved in the same aprotic solvent to form LiI / I with a LiI concentration of 0.1-0.5mol / L 2 a.

[0023] b Preparation of citric acid xylene solution: Dissolve citric acid in analytically pure xylene to prepare a 4mol / L citric acid xylene solution.

[0024] c. Preparation of polyethylene citrate base film: Add polyethylene glycol to xylene citric acid solution prepared in b, and heat polycondensation reaction with oil bath for 2-6 hours to obtain polyethylene citrate solution; Then add titanium tetraisopropoxide into the polyethylene citrate solution and continue heating in an oil bath for 4 to 10 hours until the solution is viscous, and xy...

Embodiment 1

[0030] Weigh LiI and I at a molar ratio of 10:1 2 , and then the weighed LiI and I 2 Dissolved in an aprotic solvent to form LiI / I with a LiI concentration of 0.1mol / L 2 a. Dissolve citric acid in analytically pure xylene to prepare a 4mol / L citric acid xylene solution. Then the citric acid solution with a molar ratio of citric acid and polyethylene glycol of 0.25 and polyethylene glycol with a weight average molecular weight of 100 were mixed, and heated in an oil bath at 110°C for 2 hours for polycondensation reaction to obtain a polyethylene citrate solution. Then tetraisopropoxytitanium with a mass ratio of tetraisopropoxytitanium to polyethylene citrate of 0.10 was added to the polyethylene citrate solution and continued to heat in an oil bath at 110°C for hybridization reaction for 4h until the solution In order to find a viscous shape, extract the xylene under low pressure to prepare a polyethylene citrate prepolymer. Then pour the prepared polyethylene citrate prep...

Embodiment 2

[0032] Weigh LiI and I at a molar ratio of 10:1 2 , and then the weighed LiI and I 2 Dissolved in an aprotic solvent to form LiI / I with a LiI concentration of 0.3mol / L 2 a. Dissolve citric acid in analytically pure xylene to prepare a 4mol / L citric acid xylene solution. Then the citric acid solution with a molar ratio of citric acid and polyethylene glycol being 1 and the polyethylene glycol having a weight average molecular weight of 100 were mixed, heated in an oil bath at 120° C. for 4 h to obtain a polyethylene citrate solution, Then tetraisopropoxytitanium with a mass ratio of tetraisopropoxytitanium to polyethylene citrate of 0.40 was added to the polyethylene citrate solution and continued to heat in an oil bath at 120°C for hybridization reaction for 8h until the solution In order to find a viscous shape, extract the xylene under low pressure to prepare a polyethylene citrate prepolymer. Then pour the prepared polyethylene citrate prepolymer into a film-forming con...

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Abstract

The invention relates to a polymer electrolyte, and specifically relates to a biodegradable crosslinking polymer electrolyte membrane and a preparation method thereof. The biodegradable crosslinking polymer electrolyte membrane is prepared by activating a crosslinked polyethylene citrate matrix membrane in a LiI / I2 electrolyte solution of which the LiI concentration is 0.1-0.5mol / L. By using the crosslinking process, the preparation method ensures that the prepared polymer matrix membrane has favorable thermal stability and electrochemical stability. By controlling the ratio of polymer components to control the crosslinking degree of the polymer matrix membrane, the invention is beneficial to controlling the liquid-absorbing rate of the polymer electrolyte matrix membrane, thereby controlling the conductivity of the polymer electrolyte membrane; and the invention ensures that the electrolyte matrix membrane can be presented in different shapes under the conditions of different crosslinking degrees, thereby enabling the electrolyte membrane to adapt to the requirements of different working environments. The preparation method has the advantages of high efficiency, low cost, simple process, wide application range and no environment pollution.

Description

technical field [0001] The invention relates to a polymer electrolyte, in particular to a biodegradable cross-linked polymer electrolyte membrane and a preparation method thereof. Background technique [0002] Since the first batch of portable dry batteries were mass-produced in the United States at the end of the 19th century, after more than a century of development, batteries have spread in every corner of people's production and life, especially in mobile electronic and electrical equipment, where batteries play an irreplaceable role. The emergence of batteries has greatly facilitated and enriched people's lives. In modern society, batteries have become an indispensable part of people's daily life. [0003] At present, commonly used batteries can be divided into liquid batteries, solid batteries and gel batteries between liquid and solid in terms of electrolyte state. Liquid batteries such as nickel-cadmium batteries, lead-acid batteries, and nickel-metal hydride batte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/00C08K3/16C08K3/02C08J5/18C08J3/24H01M2/16
CPCY02E60/12Y02E60/10
Inventor 许杰梁桂杰赵磊徐卫林沈小林董思
Owner WUHAN TEXTILE UNIV