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Temperature and pH dual-responsive polyhedral oligomeric silsesquioxane/poly[2-(dimethyl amino)-ethyl methacrylate]-b-poly(N-isopropylacrylamide) hybrid materials synthesized via RAFT polymerization and thiol-ene reaction: Potential candidates as drug delivery systems

  • Zhenglong Yang*
  • , Xinyan Liu
  • , Xiaoli Xu
  • , Sai Chen
  • , Xingyi Zhu
  • , Yuchuan Du
  • , Feng Li
  • *Corresponding author for this work
  • Tongji University
  • Ministry of Transport of the People's Republic of China

Research output: Contribution to journalArticlepeer-review

Abstract

The temperature and pH dual-responsive polyhedral oligomeric silsesquioxane/poly[2-(dimethylamino)-ethyl methacrylate]-b-poly(N-isopropylacrylamide) hybrid materials (POSS/PDMAEMA-b-PNIPAM) were synthesized via combination of thiol-ene click chemistry and reversible addition fragmentation chain transfer polymerization. Their structures and self-assembly behaviors were characterized via 1H NMR, TEM, UV-vis and DLS measurements. POSS/PDMAEMA-b-PNIPAM could self-assemble into thermo- and pH-sensitive micelles with the POSS heads forming as a core and the PDMAEMA-b-PNIPAM chains as a corona. In vitro drug release behavior of POSS/PDMAEMA-b-PNIPAM micelles loading camptothecin indicated that the rate of drug release could be effectively controlled by altering the temperature and pH values of the environment. As 80% of the camptothecin drug was released at pH 5.5 or temperature of 45 °C within 35 h, the excellent thermo- and pH-response ability of POSS/PDMAME-b-PNIPAM micelles makes them desirable candidates for controlled drug delivery systems.

Original languageEnglish
Pages (from-to)65-71
Number of pages7
JournalMaterials Chemistry and Physics
Volume179
DOIs
StatePublished - 15 Aug 2016
Externally publishedYes

Keywords

  • Chemical synthesis
  • Critical phenomena
  • Inorganic compounds
  • Polymers

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