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A kind of preparation method of oligosiloxane composite proton exchange membrane containing azole ring
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A technology of oligosiloxane and proton exchange membrane, which is applied in the field of preparation of nanocomposite membranes, and can solve the problems of decreased proton conductivity and the like
Active Publication Date: 2022-07-05
HEBEI UNIV OF TECH
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However, some inorganic substances can be simply functionalized. When they are doped into the polymer matrix, the inorganic fillers may be aggregated, resulting in phase separation of the composite membrane and a decrease in the proton conductivity.
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Embodiment 1
[0041] (1) 3-Amino-1,2,4-triazole (Atri) was added to isopropanol for uniform dispersion at 25°C, then glycidyl methacrylate (GMA) was added, and after 24 hours of reaction, the The solvent was evaporated to give glycidyl methacrylate-3-amino-1,2,4-triazole (GMA-Atri);
[0042] Wherein, the mass ratio of 3-amino-1,2,4-triazole (Atri) to glycidyl methacrylate (GMA) is 8:11; 34 grams of Atri are added per liter of isopropanol;
[0043] (2) Disperse GMA-Atri in deionized water at 70° C., add initiator AIBN to start the reaction, add octavinyl octasilsesquioxane (OVPOSS) after 1 hour of reaction, and react for 6 hours later, the obtained The product is precipitated in methanol, and then dried in a vacuum oven to obtain the desired azole ring-containing oligosiloxane nanofiller PGA;
[0044] Among them, the mass ratio of GMA-Atri to OVPOSS is 90:1; the mass of the added initiator is 1% of the sum of the mass of monomer 3 and monomer 4; 75 grams of GMA-Atri is added per liter of de...
Embodiment 2
[0067] Other steps are the same as in Example 1, except that Atri is replaced by Tri (1H-1,2,4-triazole). The obtained monomer 3 is GMA-Tri (glycidyl methacrylate-1H-1,2,4-triazole), and finally PGT (oligomeric siloxane organic-inorganic composite filler containing an azole ring) is obtained. The properties of the obtained composite membrane were close to those of Example 1.
Embodiment 3
[0069] The other steps are the same as those in Example 1, except that SPEEK is replaced by SPES (sulfonated polyarylethersulfone), and finally the composite membrane obtained is SPES / PGA-X. The properties of the obtained composite membrane were close to those of Example 1.
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Abstract
The present invention relates to a preparation method of an azole ring-containing oligomeric siloxane composite proton exchange membrane. The method includes the following steps: adding a first monomer and reacting a second monomer to obtain a third monomer; under the action of an initiator, reacting the third monomer and the fourth monomer to obtain a low-carbon oxazole ring-containing monomer Polysiloxane nano-filler PGA; PGA is mixed with a matrix, the obtained mixed solution is cast on a glass plate, and a composite film (SPEEK / PGA‑X) is obtained after drying. The high-performance and low-cost proton exchange membrane obtained by the present invention can be widely used in fuel cells, and is of great significance and critical for reducing the cost of fuel cells, improving the upstream industrial chain of fuel cells, and promoting the development of new energy fields. effect.
Description
technical field [0001] The invention belongs to the field of preparation of nanocomposite membranes with high proton conductivity, and particularly relates to an azole ring-containing oligosiloxane composite proton exchange membrane that satisfies both high proton conductivity and excellent dimensional stability. Background technique [0002] Proton exchange membrane fuel cell is an environmentally friendly energy device with high conversion efficiency and no pollution emission. As one of the core components of the fuel cell, the proton exchange membrane also plays the dual role of separating the fuel and the oxidant and conducting protons. Its excellent comprehensive performance is the guarantee for the long-term and efficient operation of the fuel cell. Up to now, the PEMs reported in the literature are mainly divided into four categories: (1) fluorine-containing exchange membranes, which mainly include Nafion series membranes from DuPont in the United States and Solvay me...
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