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A kind of sulfonated naphthalene ether grafted fluorine-containing polyether proton exchange membrane and preparation method thereof

A proton exchange membrane and fluorine-containing polyether technology, which is applied in the field of sulfonated naphthalene ether grafted fluorine-containing polyether proton exchange membrane and its preparation, can solve the problem of difficult control of polymer synthesis conditions, complex synthesis routes, and difficult scale problems such as chemical production, to achieve the effects of controllable sulfonation degree, simple synthesis process and good dimensional stability

Active Publication Date: 2018-09-04
南京金瑞立丰硬质材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis route of this type of polymer is complicated, and strict anhydrous and oxygen-free conditions are required, and it is carried out at -75°C. The synthesis conditions of the polymer are difficult to control, and it is not easy to produce on a large scale.

Method used

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  • A kind of sulfonated naphthalene ether grafted fluorine-containing polyether proton exchange membrane and preparation method thereof
  • A kind of sulfonated naphthalene ether grafted fluorine-containing polyether proton exchange membrane and preparation method thereof
  • A kind of sulfonated naphthalene ether grafted fluorine-containing polyether proton exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1: Preparation of sulfonated naphthalene ether grafted fluorine-containing polyether proton exchange membrane sSPFAE(SDP)-SNA-0.55 (A1).

[0048] Preparation of fluorine-containing hydrophobic backbone polymer: 0.463 g (2.5 mmol) 4,4'-dihydroxybiphenyl, 0.625 g (2.5 mmol) 4,4'-dihydroxyphenyl sulfone and 1.687 g (5.05 mmol) Decafluorobiphenyl was added to a three-necked flask, 11 mL of DMAc, 0.828 g (6 mmol) of anhydrous potassium carbonate, and 10 mL of cyclohexane were added. The temperature was raised to 90° C. for 10 hours and then lowered to room temperature. The product was poured into deionized water to precipitate a fibrous product, which was thoroughly washed with water and vacuum-dried at 80° C. for 24 hours to obtain a white product.

[0049] Preparation of sSPFAE(SDP)-SNA-0.55: Add 3.726 g (3.636 mmol) of the above-mentioned fully dried polymer and 18 mL of DMAc into a three-necked flask. After the solid is completely dissolved, add pre-dissolved in...

Embodiment 2

[0051] Example 2: Preparation of sulfonated naphthalene ether grafted fluorine-containing polyether proton exchange membrane sSPFAE(SDP)-SNA-0.60 (A2)

[0052] Similar to the preparation method of A(1) in Example 1, the difference is that the amount of 1-naphthol-3,6-disulfonic acid sodium and potassium carbonate is different, and 1-naphthol-3,6-disulfonic acid The amount of sodium used was 0.784 g (2.25 mmol), and the amount of potassium carbonate used was 0.373 g (2.7 mmol) to obtain proton-type sulfonated polymer membrane A2.

[0053] Its performance data is shown in Table 1, and the conductivity in water at different temperatures is shown in figure 2 .

Embodiment 3

[0054] Example 3: Preparation of sulfonated naphthalene ether grafted fluorine-containing polyether proton exchange membrane sSPFAE(SDP)-SNA-0.65 (A3)

[0055] Similar to the preparation method of A(1) in Example 1, the difference is that the amount of 1-naphthol-3,6-disulfonic acid sodium and potassium carbonate is different, and 1-naphthol-3,6-disulfonic acid The amount of sodium used was 0.871 g (2.5 mmol), and the amount of potassium carbonate used was 0.414 g (3.0 mmol) to obtain proton-type sulfonated polymer membrane A3.

[0056] Its performance data is shown in Table 1, and the conductivity in water at different temperatures is shown in figure 2 .

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Abstract

The invention discloses a sulphonated naphthalene ether grafted fluorinated polyether containing proton exchange membrane and a preparation method thereof. The proton exchange membrane is synthesized through the following steps that 1, a polyether polymer containing perfluoro-substitution benzene rings is synthesized through a nucleophilic substitution reaction; 2, a bis-sulfonated naphthalene ether grafted fluorinated polyether containing polymer is synthesized through the nucleophilic substitution reaction between bis-sulfonated naphthol and the perfluoro-substitution benzene rings; 3, the obtained polymer is dissolved in an organic solvent according to a certain proportion, and the membrane is formed through a solution casting method. A series of bis-sulfonated naphthalene ether grafted fluorinated polyether containing polymers with the ion exchange capacity are synthesized by changing the proportion of bis-sulfonated naphthol and the fluorinated polyether containing polymer, the synthesis process is simple, the degree of sulfonation can be controlled, the reactivity and hydrophobicity of Aromatic substitution fluorine atoms are utilized, and the prepared proton exchange membrane is moderate in water absorption, excellent in dimension stability, good in chemical stability and high in conductivity.

Description

technical field [0001] The invention belongs to the preparation technology of proton exchange membranes, in particular to a proton exchange membrane grafted with fluorine-containing polyether by sulfonated naphthalene ether and a preparation method thereof. Background technique [0002] The polymer electrolyte membrane is one of the key components of the polymer electrolyte membrane fuel cell (PEMFC). Its main functions include two aspects: one is used to selectively transfer ions and insulate electrons, and the other is to separate fuel / oxidant and support catalysts . Electrolyte membrane materials with excellent performance should have high ionic conductivity and thermal and chemical stability, and at the same time be strong and flexible, have certain water absorption and water retention properties, be easy to form and process, and can be obtained at low cost. In recent years, most of the electrolyte membranes used in PEMFC are perfluorosulfonic acid type electrolyte memb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/22C08G65/48
CPCC08G65/48C08J5/2262C08J2371/00
Inventor 陈守文胡朝霞解立新严小波陆瑶鞠荣茂
Owner 南京金瑞立丰硬质材料科技有限公司
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