Preparation of poly(acrylic acid) nano-films by in-situ polymerization of acrylic acid macroclusters on silicon oxide surfaces

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A new method for preparing poly(acrylic acid) (PAA) films on silicon oxide surfaces with smooth morphology has been developed. Acrylic acid (AA) was preferably adsorbed on silicon oxide surfaces in AA/ chloroform binary liquids and formed a hydrogen-bonded organized structure, which was called molecular macrocluster. AA macroclusters on silicon oxide surfaces were in-situ polymerized to obtain molecularly flat polymer films with thickness up to 10 nm. In-situ polymerizations were conducted by photo-irradiation in the presence of a photo initiator, 2,2-dimethoxy-2-phenyl-acetophenone (DPA). As a reference, the adsorption of PAA polymerized in the bulk solution was examined on silicon oxide surfaces. A series of techniques such as attenuated total reflection-FTIR (ATR-FTIR) spectroscopy, ellipsometry and atomic force microscopy (AFM) was utilized for characterizing two types of films. It was found that flat PAA films with linear hydrogen-bonded COOH could only be obtained by insitu polymerization, which demonstrated this method was an effective way for preparing molecularly uniform polymer films. The surface morphology and thickness of obtained PAA films were found to be dependent on the monomer concentration, initiator amount and photoirradiation time. Molecularly uniform and flat PAA films were obtained after 5 min irradiation at 0.8 mol% AA in the presence of 5 wt% DPA.

Original languageEnglish
Pages (from-to)40-47
Number of pages8
JournalMacromolecular Symposia
Volume270
Issue number1
DOIs
Publication statusPublished - 2008 Aug 1

Keywords

  • Acrylic acid
  • Films
  • Macroclusters
  • Photopolymerization

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Preparation of poly(acrylic acid) nano-films by in-situ polymerization of acrylic acid macroclusters on silicon oxide surfaces'. Together they form a unique fingerprint.

Cite this