NDLI: Polymeric membranes composed of polystyrenes tethering amino acids for preferential CO2 separation over H2

Content Provider	Springer Nature Link
Author	Taniguchi, Ikuo Ootera, Yuka Chowdhury, Firoz A. Tomizaki, Kin ya Kai, Teruhiko Kazama, Shingo
Copyright Year	2012
Abstract	Various N-tert-butoxycarbonyl (N-Boc) amino acids, such as glycine, valine, and serine, were combined to 4-chloromethylstyrene. The resulted monomers were readily polymerized to give polystyrenes tethering an amino acid by a conventional free radical polymerization technique. After deprotection of the N-Boc group with trifluoroacetic acid, the obtained polystyrene derivatives were soluble in ethanol and spin-coated on a commercial poly(ether sulfone) porous membrane to fabricate a composite membrane for CO2 separation over H2. The CO2 selective layer of synthesized PSt was ca. 200 nm thick, and the composite membranes showed preferential CO2 separation over H2, while parent polystyrene passed through H2 rather than CO2. Especially, the separation factor $$ \alpha_{{{\text{CO}}_{ 2} /{\text{H}}_{ 2} }} $$ was raised after alkaline treatment to form free primary amine on the terminus of graft chain. Serine tethered polystyrene showed the highest $$ \alpha_{{{\text{CO}}_{ 2} /{\text{H}}_{ 2} }} $$ (16) among them, which suggested the hydroxyl group would enhance the CO2 affinity of primary amine.
Starting Page	405
Ending Page	415
Page Count	11
File Format	PDF
ISSN	01700839
Journal	Polymer Bulletin
Volume Number	69
Issue Number	4
e-ISSN	14362449
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-03-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polymeric membrane CO2 Gas separation Amino acid Polystyrene Soft and Granular Matter, Complex Fluids and Microfluidics Physical Chemistry Characterization and Evaluation of Materials Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Condensed Matter Physics Polymers and Plastics

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