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Polymer with asu structure in main chain, preparation method thereof, and anion exchange membrane based on the polymer
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An anion exchange membrane and polymer technology, applied in the field of fuel cell and polymer material synthesis, to achieve the effect of wide applicability and simple method
Active Publication Date: 2020-07-28
ZHEJIANG UNIV
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Problems solved by technology
The introduction of N-spirocyclic quaternaryammonium salts into polymers requires new synthetic methods and presents new challenges for materials
Method used
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Embodiment 1
[0023] Polycondensation of 1,4,5,8-tetrabromomethylnaphthalene and 1,3-bis(4-piperidinyl)propane
[0024] 250mg (0.5mmol) 1,4,5,8-tetrabromomethylnaphthalene was dissolved in 7mL DMF, and then 290mg DIPEA, 105mg (0.5mmol) 1,3-bis(4-piperidinyl)propane DMF were added Mixed solution with water (1mL / 1.5mL). After reacting at 60°C for 10 hours, it was cooled, dropped into 50 mL of acetone for precipitation, filtered off with suction, and dried to obtain the product, which was verified by nuclear magnetism.
Embodiment 2
[0026] Polycondensation of 1,4,5,8-tetrabromomethylnaphthalene and 4,4'-bipiperidine
[0027] 500mg (1mmol) 1,4,5,8-tetrabromomethylnaphthalene was dissolved in 15mL DMF, then 903mg DIPEA, 241mg (1mmol) 1,3-bis(4-piperidinyl)propane DMF and water were added The mixed solution (2mL / 3mL). After reacting at 60°C for 10 hours, it was cooled, dropped into 100 mL of acetone for precipitation, filtered with suction, and dried to obtain the product with a yield of 95%.
Embodiment 3
[0029] Polycondensation of 3,4,9,10-tetrachloromethylperylene with 1,3-bis(4-piperidinyl)propane
[0030] 223mg (0.5mmol) 3,4,9,10-tetrachloromethylperylene was dissolved in 8mL NMP, and then 290mg DIPEA, 105mg (1mmol) 1,3-bis(4-piperidinyl)propane NMP and Water mixed solution (1mL / 1.5mL). After reacting at 60°C for 10 hours, it was cooled, dropped into 100 mL of acetone for precipitation, filtered with suction, and dried to obtain the product with a yield of 98%.
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Abstract
The invention discloses a quaternaryammonium salt cation polymer with a main chain containing a 6-azacyclo-spiro[5,5] undecane (ASU) structure and a preparing method thereof and an anion-exchange membrane based on the polymer. The N-spirane structure can effectively limit an elimination reaction and a ring-opening substitution reaction in the alkaline environment, and therefore the high alkalinestability is achieved. The quaternaryammonium salt cation polymer is obtained after tetrabromo-methyl-substituted benzene, naphthalene, pyrene and the like and 1,3-di(4-piperidine) propane or 4,4'-dipiperidine are subjected to polycondensation; other active groups such as ether and ketone are not contained in the main chain, and the good tolerance of the polymer for alkali is achieved.
Description
Technical field [0001] The invention belongs to the field of fuel cell and polymer material synthesis, and relates to a type of polymer with a 6-nitrogen heterocyclic spiro[5,5]undecane (ASU) structure in the main chain obtained by condensation polymerization and a preparation method thereof and An anion exchange membrane based on this polymer. Background technique [0002] As a clean, efficient, safe and green energy conversion device, fuel cell is expected to become the most prominent new technology in new energy applications. Among them, the alkaline anion exchange membrane fuel cell has the advantages of high specific power, high power generation efficiency, and environmental friendliness. At the same time, it avoids the disadvantages of high cost of precious metal catalysts and high methanol permeability of proton exchange membrane fuel cells. New energy technology of concern. The nature of anion exchange membrane largely determines the final performance of alkaline fuel c...
Claims
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