Toward pH-responsive coating materials--high-throughput study of (meth)acrylic copolymers

ACS Comb Sci. 2014 Aug 11;16(8):386-92. doi: 10.1021/co500011c. Epub 2014 Jul 10.

Abstract

The release behavior of a model compound (β-naphthol orange) encapsulated in (meth)acrylate-based statistical copolymers under different environmental conditions was investigated. From monomers of varying polarity (methyl acrylate, ethyl acrylate, tert-butyl acrylate, 2-ethylhexyl methacrylate, and benzyl methacrylate) in combination with methacrylic acid, five polymer series were synthesized by free radical polymerization. The pH-dependent release kinetics were investigated via UV-vis spectroscopy at pH 1.2 and 6.8, simulating physiological conditions in the stomach and intestines. Furthermore, the influence of different ethanol contents (0 and 40 vol %) in the acidic medium was investigated. The whole approach was designed to meet the requirements of a high-throughput experimentation workflow.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Azo Compounds / administration & dosage*
  • Benzenesulfonates / administration & dosage*
  • Delayed-Action Preparations / chemical synthesis
  • Delayed-Action Preparations / chemistry*
  • High-Throughput Screening Assays
  • Hydrogen-Ion Concentration
  • Polymerization
  • Polymethyl Methacrylate / chemical synthesis
  • Polymethyl Methacrylate / chemistry*

Substances

  • Azo Compounds
  • Benzenesulfonates
  • Delayed-Action Preparations
  • Polymethyl Methacrylate
  • 2-naphthol orange