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

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Ice recrystallisation inhibiting polymer nano-objects via saline-tolerant polymerisation-induced self-assembly
Materials Horizons ( IF 12.2 ) Pub Date : 2020-05-14 , DOI: 10.1039/d0mh00354a
Panagiotis G Georgiou ₁ , Ioanna Kontopoulou ₁ , Thomas R Congdon ₁ , Matthew I Gibson _{1,

2}

Affiliation

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.

中文翻译：

通过耐盐水聚合诱导的自组装抑制聚合物纳米物体的冰重结晶

调节冰形成/生长的化学工具具有巨大的（生物）技术价值，冰结合/防冻蛋白是仿生材料令人兴奋的目标。在这里，我们介绍了聚合物纳米材料，它是使用聚合诱导自组装（PISA）并采用聚（乙烯醇）接枝大分子链转移剂（macro-CTA）的冰重结晶的有效抑制剂。至关重要的是，用双丙酮丙烯酰胺设计核心形成块使得 PISA 能够在盐水中进行，而聚（甲基丙烯酸 2-羟丙酯）核心则导致凝结。最活跃的颗粒抑制冰生长的量低至0.5 mg mL ^-1，并且比单独的PVA稳定剂块更活跃，表明这种纳米颗粒形式的致密堆积增强了活性。这为获得能够调节冰生长的胶体提供了一条独特的途径。

更新日期：2020-07-06

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