𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Formation and analysis of a polyimide layer in composite membranes

✍ Scribed by G. A. Polotskaya; V. P. Sklizkova; N. D. Kozhurnikova; G. K. Elyashevich; V. V. Kudryavtsev

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
220 KB
Volume
75
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

Composite membranes containing a thin-film layer of aromatic polyimides (PI) ensure an advantageous combination of selectivity and permeability in gas separation. A series of rigid-chain PI with different chemical structures were studied as a thin active layer. Composite membranes were prepared by coating a solution of poly-(amic acid) (PAA) and an imidization catalyst on a poly(phenylene oxide) (PPO) support with pores filled by decane. The subsequent stage of solid-state catalytic transformation of the PAA/PPO membrane into the PI/PPO membrane determines the specific structure of the PI layer and the transport properties of the PI/PPO composite membranes. The structure of composite membranes was determined by scanning electron microscopy and analyzed in the terms of the resistance model of gas transport in composite membranes.

πŸ“œ SIMILAR VOLUMES

Effects of the support-layer hydrophilic
Effects of the support-layer hydrophilicity on the active-layer formation of composite membranes
✍ M. Y. Jeon; S. H. Yoo; C. K. Kim πŸ“‚ Article πŸ“… 2007 πŸ› John Wiley and Sons 🌐 English βš– 301 KB πŸ‘ 2 views

## Abstract To understand the effects of the hydrophilicity of the support layer on the formation of the active layer and the performance of composite membranes, a support layer was prepared from a polysulfone (PSf) blend with a hydrophilic copolymer, and then its top surface was overcoated with an

Spontaneous Three-Layer Formation in the
Spontaneous Three-Layer Formation in the Curing of Polyimide/Epoxy Blends
✍ Fenghua Chen; Xin Wang; Xiaojuan Zhao; Jingang Liu; Shiyong Yang; Charles C. Han πŸ“‚ Article πŸ“… 2008 πŸ› John Wiley and Sons 🌐 English βš– 315 KB

## Abstract Morphological structures of epoxy resin toughened by a fluorinated polyimide were observed by SEM. Three layers formed spontaneously parallel to the film surface in the range of polyimide weight fraction __w__ = 0.14–0.20, when the samples were cured at 130 °C. The two outer layers cons

Vibration and damping analysis of a thre
Vibration and damping analysis of a three-layered composite plate with a viscoelastic mid-layer
✍ P. CupiaΕ‚; J. NizioΕ‚ πŸ“‚ Article πŸ“… 1995 πŸ› Elsevier Science 🌐 English βš– 608 KB

The natural frequencies and loss factors of a rectangular three-layered plate with a viscoelastic core layer and laminated face layers are considered. The equations of free vibration of the plate together with the corresponding boundary conditions are derived for a non-symmetric plate with general a

A comparative simulation analysis of pro
A comparative simulation analysis of propane dehydrogenation in composite and microporous membrane reactors
✍ Kaihu Hou; Ronald Hughes πŸ“‚ Article πŸ“… 2003 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 129 KB

## Abstract Propane dehydrogenation has been simulated for a composite membrane reactor and a microporous membrane reactor using plug‐flow reactor models, in which both were packed with Pt/Al~2~O~3~ catalyst in the tube‐side. The reaction kinetics employed in the analysis were obtained from experim