The density and crystallinity properties of PPO-silica mixed-matrix membranes produced via the in situ sol-gel method for H2/CO2 separation. II: Effect of thermal annealing treatment

被引：32

作者：

Zhuang, Guo-Liang ^{[1
]}

Wey, Ming-Yen ^{[1
]}

Tseng, Hui-Hsin ^{[2
,3
]}

机构：

[1] Natl Chung Hsing Univ, Dept Environm Engn, Taichung 402, Taiwan

[2] Chung Shan Med Univ, Sch Occupat Safety & Hlth, Taichung 402, Taiwan

[3] Chung Shan Med Univ Hosp, Dept Occupat Med, Taichung 402, Taiwan

来源：

CHEMICAL ENGINEERING RESEARCH & DESIGN | 2015年 / 104卷

关键词：

Thermal annealing; PPO; Silica; Crystallinity; Mixed matrix membrane; Gas separation; INDUCED PLASTICIZATION; MOLECULAR-WEIGHT; NATURAL-GAS; CO2; PERMEATION; PERFORMANCE; SURFACE; PURIFICATION; MORPHOLOGY; CHALLENGES;

D O I：

10.1016/j.cherd.2015.08.020

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The transport properties of gases in PPO (poly(2,6-dimethyl-1,4-phenylene oxide))-silica mixed matrix membranes (MMMs) were improved using a thermal annealing method. The density and crystallinity properties of the MMMs were characterized using TGA, XRD, FESEM, and FTIR to clarify the predominant mechanism of thermal annealing. The results indicate that the thermal-annealing treatment can induce the polymer chains to re-crystallize by annealing above T-g rather than causing them to exhibit solvent vaporization when MMMs were used. After thermal annealing, a significant enhancement in the gas separation, thermal stability, and plasticization resistance was observed for the PPO-silica MMMs. PPO-S5-220 (5 wt.% silica) MMM produced the highest H-2 permeability of 257.23 Barrer and the highest H-2/CO2 selectivity of 3.6. (C) 2015 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

引用

页码：319 / 332

页数：14

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