Schulz M, Brinkhuis R, Crean C, Sear R P, Keddie J L
Department of Physics, University of Surrey, Guildford, Surrey, GU2 7XH, UK.
Allnex, Nieuwe Kanaal 7N, 6709 PA Wageningen, The Netherlands.
Soft Matter. 2022 Mar 30;18(13):2512-2516. doi: 10.1039/d2sm00194b.
The non-equilibrium assembly of bimodal colloids during evaporative processes is an attractive means to achieve gradient or stratified layers in thick films. Here, we show that the stratification of small colloids on top of large is prevented when the viscosity of the continuous aqueous phase is too high. We propose a model where a too narrow width of the gradient in concentration of small colloids suppresses the stratification.
在蒸发过程中双峰胶体的非平衡组装是在厚膜中实现梯度或分层结构的一种有吸引力的方法。在此，我们表明当连续水相的粘度过高时，小胶体在大胶体之上的分层会受到抑制。我们提出了一个模型，其中小胶体浓度梯度的宽度过窄会抑制分层。
