Jump to main content
Jump to site search


A new visible light and temperature responsive diblock copolymer

Abstract

A visible light and temperature responsive diblock copolymer of poly[6-(2,6,2’,6’-tetramethoxy-4’-oxyazobenzene) hexyl methacrylate]-block-poly(N-isopropylacrylamide) (PmAzo-b-PNIPAM) was synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization by carefully tuning the polymerization condition. The PmAzo-b-PNIPAM block copolymer forms micelles in water, and the hydrohpobic and visible light responsive PmAzo block forms the core of the micelles and the thermoresponsive PNIPAM block keeps the micelles suspended in water. The size of the micelles is firmly correlative to the degree of polymerization (DP) of the PmAzo and PNIPAM blocks. The PmAzo-b-PNIPAM micelles are thermo-responsive and photo-responsive. Aggregation of micelles occurs at temperature above the phase transition temperature of the PNIPAM block, which slightly decreases with the DP of the PmAzo block. The visible-light-induced isomerization of the azobenzene moieties in the PmAzo block leads to a decrease or increase of hydrodynamic diameter Dh of the micelles dependent on irradiation light wavelength.

Back to tab navigation

Supplementary files

Publication details

The article was received on 16 Jul 2019, accepted on 10 Aug 2019 and first published on 15 Aug 2019


Article type: Paper
DOI: 10.1039/C9PY01050E
Polym. Chem., 2019, Accepted Manuscript

  •   Request permissions

    A new visible light and temperature responsive diblock copolymer

    S. Qian, S. Li, W. Xiong, H. Khan, J. Huang and W. Zhang, Polym. Chem., 2019, Accepted Manuscript , DOI: 10.1039/C9PY01050E

Search articles by author

Spotlight

Advertisements