2016-High-Strength, Soluble Polyimide Membranes Incorporating Tr?ger''''''''s Base for Gas Separation
作者：Yongbing Zhuang, Jong Geun Seong, Yu Seong Do, Won Hee Lee, Moon Joo Lee, Michael D. Guiver*, Young
關(guān)鍵字：High-Strength, Soluble Polyimide Membranes
論文來源：期刊
具體來源：Journal of Membrane Science
發(fā)表時間：2016年
Three soluble and processable polyimides (PIs) were prepared in high yield from imide-containing diamines via
Tr?ger’s Base (TB) polymerization reactions using dimethoxymethane
(DMM). The three novel imide-containing diamines were easily synthesized
from a commercial diamine precursor, 2,6-diaminotoluene and three
commercially available dianhydrides. The corresponding membranes had
fractional free volume (FFV) values in the range of
0.170–0.200, good mechanical, thermal and gas transport properties,
which were correlated with the polymer chain structures. The
incorporation of TB units into the PI backbone improved the gas
transport performance. The TB-based polyimide membrane from BTDA had a
CO2 permeability of 19.6 Barrer, an elongation at break of 9.0%, and a tensile strength of 114.2 MPa, suggesting better properties as gas separation membranes than Matrimid® polyimide from the same BTDA.