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Study of the interaction between a diblock polyelectrolyte PDMA-b-PAA and a gemini surfactant 12-6-12 in basic media

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Abstract.
The interactions between negatively charged diblock polyelectrolyte PDMA71-b-PAA59 and oppositely
charged gemini surfactant hexylene-1,6-bis(dodecyldimethylammonium bromide) (12-6-12) in basic
media were studied using dynamic light scattering, fluorescence spectroscopy, surface tension, and
1H NMR. With increased addition of surfactant, the conformation of polyelectrolyte experienced changes
from the initial unimer with open-extended PAA block, to the nano-scaled aggregates/complexes with
a maximum hydrodynamic diameter (Dh), and finally to the stable complexes with a smaller Dh.
Accordingly, the value of Dh during the whole process of increasing the surfactant concentration changed
from 14–17 nm, to 184 nm, and to the final 70 nm, respectively. This transformation was driven by the
electrostatic attractive/repulsive interactions, the hydrophobic interaction between hydrophobic surfactant
tails, and the hydrophilicity of PDMA block.

Keywords:
Diblock polyelectrolyte
Gemini surfactant
Electrostatic force
Hydrophobic interaction
Conformation

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Informasi Detail

Judul Seri

Journal of Colloid and Interface Science

No. Panggil

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Penerbit

London : Elsevier Inc.., 2009

Deskripsi Fisik

Journal of Colloid and Interface Science 333 (2009) 135–140

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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