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A Study of the Reinforcement Effect of MWCNTs onto Polyimide Flat Sheet Membranes

  • Polyimides rank among the most heat-resistant polymers and find application in a variety of fields, including transportation, electronics, and membrane technology. The aim of this work is to study the structural, thermal, mechanical, and gas permeation properties of polyimide based nanocomposite membranes in flat sheet configuration. For this purpose, numerous advanced techniques such as atomic force microscopy (AFM), SEM, TEM, TGA, FT-IR, tensile strength, elongation test, and gas permeability measurements were carried out. In particular, BTDA–TDI/MDI (P84) co-polyimide was used as the matrix of the studied membranes, whereas multi-wall carbon nanotubes were employed as filler material at concentrations of up to 5 wt.% All studied films were prepared by the dry-cast process resulting in non-porous films of about 30–50 μm of thickness. An optimum filler concentration of 2 wt.% was estimated. At this concentration, both thermal and mechanical properties of the prepared membranes were improved, and the highest gas permeability values were also obtained. Finally, gas permeability experiments were carried out at 25, 50, and 100 ◦C with seven different pure gases. The results revealed that the uniform carbon nanotubes dispersion lead to enhanced gas permeation properties.

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Author:Andreas A. Sapalidis, Panagiotis I. Karantzis, Achilles Vairis, Stephanos F. Nitodas, Stéphan Barbe, Evangelos P. Favvas
Parent Title (English):Polymers
Year of Completion:2020
Document Type:Article
Date of first Publication:2020/06/19
Date of Publication (online):2020/08/25
GND-Keyword:Mehrwandige Kohlenstoff-Nanoröhre; Membran; Verstärkung
Tag:Carbon nanotubes; Gas permeability; Mechanical properties; Mixed matrix membranes; Polymer nanocomposite materials; Thermal properties
Page Number:21
Institutes:Angewandte Naturwissenschaften (F11)
Dewey Decimal Classification:500 Naturwissenschaften und Mathematik
Open Access:Open Access
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International