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Ultra-low crosslinked MIcrogels.docx (7.46 MB)
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Deswelling Induced Morphological Changes in Dual pH and Temperature Responsive Ultra-Low Crosslinked Poly (N-Isopropyl Acrylamide)-Co-Acrylic Acid Microgels

preprint
submitted on 24.10.2018 and posted on 24.10.2018 by Molla Islam, Maddie Tumbarello, Andrew Lyon
We demonstrated the deswelling induced morphological change in dual pH and Temperature responsive ultra-low crosslinked Poly (N-isopropyl acrylamide)-co-acrylic acid microgels. The responsivity with pH and temperature were studied by light scattering and atomic force microscopy. Light scattering data suggest that at pH 4.5 the microgels undergo multiple transitions associated with collapse of pNIPAm-rich segments and repulsion between the AAc-rich segments. The evolution of punctate structures around the periphery or throughout the whole microgels at pH 4.5 and 6.5 respectively was revealed by AFM, further illustrating the heterogeneous deswelling present in the ionized copolymer microgels.
The impact of this study and understanding how ionization state of copolymer dictates the overall structural properties of microgels will widen our understanding for their applications in biotechnology

History

Email Address of Submitting Author

islam@chapman.edu

Institution

Chapman University

Country

USA

ORCID For Submitting Author

55303533000

Declaration of Conflict of Interest

No financial conflicts of interest

Version Notes

Final revised version before submission to Macromolecules

Exports