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- Title
含有序贯通孔道液晶聚合物膜的制备及其无水质子传导.
- Authors
曾泓钜; 余海溶; 程昌敬; 梁 婷
- Abstract
Supramolecular liquid crystalline polymeric complexes have been obtained by the formation of intermolecular hydrogen bonds between the benzoic acid (6OBA) and the pyridyl moieties (6SzMA). After mixing with 20 wt% crosslinking agent (C6H), polymer membranes with regularly ordered channels are obtained by in-situ photopolymerization under planar alignment condition. The polymer membrane could be applied for anhydrous proton conduction since the regularly ordered hydrogen-bonding channels are beneficial for the transportation of protons. Furthermore, the proton conductivities could be significantly enhanced by introducing H3PO4. The hydrogen bonds, liquid crystalline properties, microstructure and anhydrous proton conductivities of the functional membranes are characterized by FT-IR, POM, TGA, DSC, 2D-SAXS, high-resolution TEM and EIS. The results show that the formation of hydrogen bonds between 6OBA and 6SzMA molecules induces smectic phase, and the addition of the crosslinking agent has no significant effect on the liquid crystalline phase. After polymerization, the layered structure is fixed and the regularly arranged nano-scale ordered channels are obtained. The proton conduction is along the hydrogen bonding networks, achieving 7.1×10-9 S/cm at 170 ℃ under anhydrous condition. H3PO4 is induced into the membrane to improve the proton conduction. 6SzMA is protonated by H3PO4 and new hydrogen bonding networks are formed, which facilitates the transportation of the protons. The sufficient proton source and the enhanced hydrogen bonding networks make the conductivity significantly improve by over 4 orders of magnitude, reaching 3.2 × 10-4 S/cm at 170 ℃.
- Subjects
PHOTOPOLYMERIZATION; PHOTOPOLYMERIZATION kinetics; HYDROGEN bonding; POLYMERIZATION; MOLECULAR association
- Publication
Journal of Functional Materials / Gongneng Cailiao, 2022, Vol 53, Issue 5, p5218
- ISSN
1001-9731
- Publication type
Article
- DOI
10.3969/j.issn.1001-9731.2022.05.029