Understanding the Induced Self-Assembly System Between PEO-b-PAA and Iron
Author(s)
Sondjaja, H. Ronny
Tam, Michael K.C.
Yap, Miranda G.S.
Hatton, T. Alan
Date Issued
January 2007
Series/Report no.
Chemical and Pharmaceutical Engineering (CPE)
Abstract
The induced self-assembly phenomenon between PEO-b-PAA and Fe(II) was investigated. It was revealed that the electrostatic interaction between Fe(II) in the form of green rust (GR²⁺) particles and the COO- groups from the PAA backbone at pH 7 causes the formation of stable aggregates with Dh~156 nm. While it is stable at pH 7, the induced self-assembly structure, however, is disordered during the transformation of GR²⁺ into Fe₃O₄. The pH increment and the oxidation process itself were found to affect the stability.
Subjects
PEO-b-PAA
Self-Assembly
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