Membrane color and gas permeability of 6FDA‐TeMPD polyimide membranes prepared with various membrane preparation protocols
Membrane color and gas permeability of 6FDA‐TeMPD polyimide membranes prepared with various membrane preparation protocols
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采用不同膜制备方案制备的 6FDA-TeMPD 聚酰亚胺膜的膜颜色和透气性
DOI：
10.1002/pen.21986
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
K. Nagai
中科院分区：
文献类型：
--
作者：
S. Kanehashi;Shuichi Sato;K. Nagai
以电子器件和气体分离材料用含氟芳香族聚酰亚胺6 FDA-TeMPD {[4，4-（六氟亚异丙基）二邻苯二甲酸酐] [（6 FDA）-2，3，5，6-四甲基-1，4-苯二胺（TeMPD）]}为研究对象，系统研究了聚酰亚胺膜颜色与其气体传输分离性能及荧光光谱之间的关系。通过控制浇铸溶剂的种类和干燥条件，制备了不同分子有序结构的6 FDA-TeMPD聚酰亚胺。这种差异是基于聚酰亚胺中环状结构的π电子形成的电荷转移（CT）相互作用的影响。使用分光光度计测量膜颜色，将颜色确定为内在参数，而不收集样品。6 FDA-TeMPD聚酰亚胺膜的氧氮渗透系数与膜色指数参数L*、a*、B*、ΔE* 以及最大峰值发射波长λmax和强度Imax相关，这些参数反映了聚酰亚胺膜中CT相互作用对分子有序性的影响。Polym.工程索引，2011.© 2011年塑料工程师协会
The relations among polyimide membrane colors, their gas transport and separation properties, and their fluorescence spectra were systematically investigated using fluorine-containing aromatic polyimide, 6FDA-TeMPD {[4,4-(hexafluoroisopropylidene) diphthalic anhydride] [(6FDA)-2,3,5,6-tetramethyl-1,4-phenylene-diamine (TeMPD)]}, which was used in electronic device and gas separation materials. Different molecular ordering structures of 6FDA-TeMPD polyimides were prepared by controlling kinds of casting solvents and dry conditions. This difference was based on the effect of charge transfer (CT) interaction formed by π electrons of ring structures in polyimide. Membrane color measured using spectrophotometer determined colors as intrinsic parameters without sample collection. The permeability coefficients of oxygen and nitrogen of the 6FDA-TeMPD polyimide membranes were correlated with membrane color index parameters such as L*, a*, b*, and ΔE*, and fluorescence properties such as maximum peak emission wavelength λmax and intensity Imax, which reflect molecular ordering affected by CT interaction in polyimide membranes. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers