Complexation-tailored morphology of asymmetric block copolymer membranes

Poornima Madhavan, Klaus-Viktor Peinemann, Suzana Pereira Nunes

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

Hydrogen-bond formation between polystyrene-b-poly (4-vinylpyridine) (PS-b-P4VP) block copolymer (BCP) and -OH/-COOH functionalized organic molecules was used to tune morphology of asymmetric nanoporous membranes prepared by simultaneous self-assembly and nonsolvent induced phase separation. The morphologies were characterized by field emmision scanning electron microscopy (FESEM) and atomic force microscopy (AFM). Hydrogen bonds were confirmed by infrared (IR), and the results were correlated to rheology characterization. The OH-functionalized organic molecules direct the morphology into hexagonal order. COOH-functionalized molecules led to both lamellar and hexagonal structures. Micelle formation in solutions and their sizes were determined using dynamic light scattering (DLS) measurements and water fluxes of 600-3200 L/m 2·h·bar were obtained. The pore size of the plain BCP membrane was smaller than with additives. The following series of additives led to pores with hexagonal order with increasing pore size: terephthalic acid (COOH-bifunctionalized) < rutin (OH-multifunctionalized) < 9-anthracenemethanol (OH-monofunctionalized) < 3,5-dihydroxybenzyl alcohol (OH-trifunctionalized). © 2013 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)7152-7159
Number of pages8
JournalACS Applied Materials & Interfaces
Volume5
Issue number15
DOIs
StatePublished - Jul 15 2013

ASJC Scopus subject areas

  • Materials Science(all)

Fingerprint Dive into the research topics of 'Complexation-tailored morphology of asymmetric block copolymer membranes'. Together they form a unique fingerprint.

Cite this