选择聚苯醚作为锂离子电池用耐高温隔离膜制备膜材料，以环己醇为溶剂，采用热致相分离法（TiPS）制备聚笨耻微孔膜。绘制了聚苯醚/环己醇体系的热力学相图，并研究了聚合物含量、冷却速度、结晶粗化时间等对最终微孔膜形态的影响。聚苯醚／环己醇体系冷却时存在液．液相分离区域，偏晶点约为57．5％。微孔大小随着聚合物含量与冷却进率的增大而变小。对聚苯硫醚进行了充分的晶体粗化，将产生大量大颗粒球晶，蜂窝状微孔减少。研究表明，选择合适的成膜条件及配方，可以制备具有蜂窝状微孔且孔径均匀、孔径范围为0．1μm～1μm的聚苯醚微孔膜，可适用于锂离子电池隔离膜。
To develop a high temperature resistance separator for the lithium-ion battery, polyphenylene ether (PPE) was selccted as the membrane material. The thermally induced phase separation method (TIPS) was adopted to form a PPE microporous membrane and cyclohexanol was used as the solvent. The phase diagram of polymerdiluent mixture was studied first and then the effects of polymer concentration, cooling rates and coarsening process on membrane morphology were investigated. It is found that this system is able to undergo liquid-liquid phase separation and the monotectic point is about 57.5 %. The pore size becomes smaller when the polymer concentration and cooling rates increase. And more PPE crystallites were observed when the coarsening processing was prolonged. It is also shown that the PPE membrane, which has the pore size of 0.1 μm- 1 μm and the morphology of cellular structure can be prepared if the optimized processing and recipe were used.
参考文献
| [1] | Khulbe KC.;Lamarche G.;Kim HJ.;Matsuura T. .THE MORPHOLOGY CHARACTERISATION AND PERFORMANCE OF DENSE PPO MEMBRANES FOR GAS SEPARATION[J].Journal of Membrane Science,1997(2):211-223. |
| [2] | Tongwen Xu;Dan Wu;Liang Wu .Poly(2,6-dimethyl-1,4-phenylene oxide)(PPO)-A versatile starting polymer for proton conductive membranes(PCMs)[J].Progress in Polymer Science,2008(9):894-915. |
| [3] | Tian Y;Ding HY;Jiao QZ;Shi YQ .Influence of solvents on the formation of honeycomb films by water droplets templating[J].Macromolecular chemistry and physics,2006(5):545-553. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%