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Ice recrystallisation inhibiting polymer nano-objects via saline-tolerant polymerisation-induced self-assembly

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Abstract

Chemical tools to modulate ice formation/growth have great (bio)technological value, with ice binding/antifreeze proteins being exciting targets for biomimetic materials. Here we introduce polymer nanomaterials that are potent inhibitors of ice recrystallisation using polymerisation-induced self-assembly (PISA), employing a poly(vinyl alcohol) graft macromolecular chain transfer agent (macro-CTA). Crucially, engineering the core-forming block with diacetone acrylamide enabled PISA to be conducted in saline, whereas poly(2-hydroxypropyl methacrylate) cores led to coagulation. The most active particles inhibited ice growth as low as 0.5 mg mL−1, and were more active than the PVA stabiliser block alone, showing that the dense packing of this nanoparticle format enhanced activity. This provides a unique route towards colloids capable of modulating ice growth.

Graphical abstract: Ice recrystallisation inhibiting polymer nano-objects via saline-tolerant polymerisation-induced self-assembly

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Article information


Submitted
28 Feb 2020
Accepted
17 Apr 2020
First published
14 May 2020

This article is Open Access

Mater. Horiz., 2020, Advance Article
Article type
Communication

Ice recrystallisation inhibiting polymer nano-objects via saline-tolerant polymerisation-induced self-assembly

P. G. Georgiou, I. Kontopoulou, T. R. Congdon and M. I. Gibson, Mater. Horiz., 2020, Advance Article , DOI: 10.1039/D0MH00354A

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