Self-assembly between photoresponsive azobenzene-based dications and thermally sensitive PNIPAM-b-PAA block copolymers in aqueous solution

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Abstract

The effect of the photoresponsive azobenzene-based dications (AzoC10N2O22+) on the association in thermally sensitive poly(N-isopropylacrylamide)-b-poly(acrylic acid) (PNIPAM-b-PAA) solutions is studied for the first time. The self-assembly of this complexes was measured by dynamic light scattering (DLS), scanning electron microscopy (SEM) and ultraviolet-visible (UV-Vis) spectrum. Results show that the micellar size of this colloidal complexes can be changed by the molar weight of AzoC10N2O22+ and reversibly controlled by ultraviolet (UV) light (365 nm) and blue light (455 nm) irradiation. It is the first to use azobenzene-based dications to control the self-assembly of PNIPAM-b-PAA by light irradiation, which enables the selection of appropriate conditions for the micellar properties by light.

Keywords

Azobenzene Block copolymers Self-assembly Photoresponse 
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Notes

Acknowledgements

We gratefully thank the National Science Foundation of China (J1210040) for the support of this research.

Supplementary material

10965_2018_1445_MOESM1_ESM.docx (478 kb)
ESM 1 (DOCX 478 kb)

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© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.College of ScienceHunan Agricultural UniversityChangshaPeople’s Republic of China
  2. 2.School of Chemistry and Chemical EngineeringHunan UniversityChangshaPeople’s Republic of China

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