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论文:2017,Vol:35,Issue(4):743-748 |
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引用本文： |
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李秀平, 刘程, 王鑫, 蹇锡高. 新型聚苯并咪唑磷酸掺杂膜制备工艺的研究[J]. 西北工业大学学报 |
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Li Xiuping, Liu Cheng, Wang Xin, Jian Xigao. Study on the Preparation of Novel Phosphoric Acid Doped Pbi Membranes[J]. Northwestern polytechnical university |
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| 新型聚苯并咪唑磷酸掺杂膜制备工艺的研究 |
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| 李秀平1,2, 刘程1, 王鑫1, 蹇锡高1 |
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1. 大连理工大学 化工与环境生命学部, 辽宁 大连 116024;
2. 大连大学 环境与化学工程学院, 辽宁 大连 116622 |
| 摘要: |
| 以NMP为溶剂，通过溶液浇铸法，将主链含杂萘联苯结构的聚苯并咪唑（PPBI）铺制成膜。采用不同磷酸浓度、掺杂温度和掺杂时间，对PPBI膜进行磷酸掺杂，得到不同掺杂程度的膜。PPBI膜的磷酸掺杂程度分别随着磷酸浓度、掺杂温度和掺杂时间的增加而呈现增大的趋势。当掺杂时间超过20 h，掺杂程度趋于最大值而不再随时间的增大而增大，较优掺杂时间为30 h。在180 ℃温度条件下14.7 M的浓磷酸中掺杂能够得到最高掺杂度（15.2 mol H3PO4）的PPBI膜。将不同掺杂度的膜进行力学性能、质子传导率和耐氧化性的测试，发现膜的力学性能、传导性能和耐氧化性均依赖于掺杂程度。PPBI膜的质子传导率随着磷酸掺杂程度的增大而增大，尤其在高掺杂程度下这种趋势更加明显。PPBI膜的机械强度和耐氧化性随着掺杂程度的增大而降低，此系列PPBI膜的机械强度和耐氧化性均能够满足燃料电池质子交换膜的要求。 |
| 关键词:
杂萘联苯
聚苯并咪唑
磷酸掺杂
质子交换膜
实验设计
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| Study on the Preparation of Novel Phosphoric Acid Doped Pbi Membranes |
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| Li Xiuping1,2, Liu Cheng1, Wang Xin1, Jian Xigao1 |
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1. School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China;
2. School of Environmental and Chemical Engineering, Dalian University, Dalian 116622 |
| Abstract: |
| The PPBI polymers was cast into membranes using NMP as solvent, doped with phosphoric acid and further investigated as proton exchange membranes. To investigate the doping conditions, the PPBI membranes were doped in PA with different concentration, at different doping temperature and for different time. The doping level increased with PA concentration and doping temperature, remaining the high value after doping for 30 h. Membranes with the highest doping level were obtained by doping at high temperature. The mechanical properties and proton conductivity of PPBI membranes with different doping levels were carried out. With the increasing of doping level, the mechanical strength was reduced while the proton conductivity was enhanced. The proton conductivity increased sharply at high doping level above 13 mol H3PO4 especially at high temperature. The mechanical strength of membrane with the highest doping level was still sufficently high for proton exchange membrane fuel cell use. High performance acid doped PPBI membrane could be obtained by the high-temperature doping process. |
| Key words:
phthalazione group
polybenzimidazoles
phosphoric acid doped
proton exchange membrane
design of experiments
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| 收稿日期: 2016-10-17
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金（20604004）与大连大学博士专项基金资助 |
| 通讯作者:
Email： |
| 作者简介: 李秀平(1984—)女,大连大学讲师,从事耐高温聚合物的合成改性和燃料电池等研究。
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| 作者相关文章 |
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| 李秀平 在本刊中的所有文章 |
| 刘程 在本刊中的所有文章 |
| 王鑫 在本刊中的所有文章 |
| 蹇锡高 在本刊中的所有文章 |
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