Stimuli-responsive polymer ultrathin films with a binary architecture: Combined layer-by-layer polyelectrolyte and surface-initiated polymerization approach

Timothy M. Fulghum, Nicel C. Estillore, Cong Duan Vo, Steven P. Armes, Rigoberto C. Advincula

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

The fabrication of a multicomponent responsive polymer ultrathin film through the combined use of the layer-by-layer (LbL) and surface-initiated polymerization (SIP) techniques is described. Through the use of the weak polyelectrolytes poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA), and two alternately charged atom transfer radical polymerization (ATRP) macroinitiators, a pH-controlled membrane was prepared capable of SIP. Polymerization of n-isopropylacrylamide to form PNIPAM brushes on top of this membrane surface created a thermally responsive layer. The combination of these two systems created a dual control mechanism for permeability through the membrane where pH control can be utilized on the poly electrolyte LbL layers and thermal control on the polymer brushes. A series of experiments including electrochemistry, contact angle, and in-situ ellipsometry were used to demonstrate these effects. It is possible that other stimuliresponsive systems can be designed using the two independent macromolecular assembly and synthesis protocols. copy; 2008 American Chemical Society.

Original languageEnglish
Pages (from-to)429-435
Number of pages7
JournalMacromolecules
Volume41
Issue number2
DOIs
Publication statusPublished - 2008 Jan 22
Externally publishedYes

Fingerprint

Ultrathin films
Polyelectrolytes
Polymer films
carbopol 940
Polymerization
Brushes
Membranes
Atom transfer radical polymerization
Ellipsometry
Electrochemistry
Polycyclic aromatic hydrocarbons
Electrolytes
Acrylics
Contact angle
Polymers
Fabrication
Acids
Experiments

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Stimuli-responsive polymer ultrathin films with a binary architecture : Combined layer-by-layer polyelectrolyte and surface-initiated polymerization approach. / Fulghum, Timothy M.; Estillore, Nicel C.; Vo, Cong Duan; Armes, Steven P.; Advincula, Rigoberto C.

In: Macromolecules, Vol. 41, No. 2, 22.01.2008, p. 429-435.

Research output: Contribution to journalArticle

Fulghum, Timothy M. ; Estillore, Nicel C. ; Vo, Cong Duan ; Armes, Steven P. ; Advincula, Rigoberto C. / Stimuli-responsive polymer ultrathin films with a binary architecture : Combined layer-by-layer polyelectrolyte and surface-initiated polymerization approach. In: Macromolecules. 2008 ; Vol. 41, No. 2. pp. 429-435.
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