Fluid Flow Templating of Polymeric Soft Matter with Diverse Morphologies
Fluid Flow Templating of Polymeric Soft Matter with Diverse Morphologies
复制标题
具有不同形态的聚合物软物质的流体流动模板
DOI：
10.1002/adma.202211438
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发表时间：
2023
影响因子：
29.4
通讯作者：
Velev, Orlin D.
中科院分区：
文献类型：
--
作者：
Bang, Rachel S.;Roh, Sangchul;Williams, Austin H.;Stoyanov, Simeon D.;Velev, Orlin D.
找到一种传统的纳米纤维技术是具有挑战性的，该技术可以以可扩展的、通用的和容易调节的方式一致地产生高表面积和纳米级形态的软聚合物物质。在这里，一个通用的方法，用于制造不同的纳米和微米尺度的形态的基础上聚合物沉淀模板的流体流线在多相流的能力进行了探索。结果表明，虽然该程序操作简单，其相互交织的机制的各种组合可以可控地和可重复地导致形成非常广泛的胶体形态。通过系统地研究工艺条件，确定了12种不同类型的聚合物微米和纳米结构，包括颗粒、棒、带、纳米片和软树枝状胶体（树枝状胶体）。结果被解释为划定的物理过程分为三个阶段：流体动力剪切，毛细管和机械破碎，和聚合物沉淀速率。对基本机制的深入了解为开发通用和可扩展的纳米纤维平台提供了指导。经验证，基于液体剪切的技术是通用的，并且与许多化学上不同的聚合物和生物聚合物一起工作良好，显示出作为许多形态上不同的软物质类的简单和可扩展的纳米纤维的通用工具的潜力。
It is challenging to find a conventional nanofabrication technique that can consistently produce soft polymeric matter of high surface area and nanoscale morphology in a way that is scalable, versatile, and easily tunable. Here, the capabilities of a universal method for fabricating diverse nano‐ and micro‐scale morphologies based on polymer precipitation templated by the fluid streamlines in multiphasic flow are explored. It is shown that while the procedure is operationally simple, various combinations of its intertwined mechanisms can controllably and reproducibly lead to the formation of an extraordinary wide range of colloidal morphologies. By systematically investigating the process conditions, 12 distinct classes of polymer micro‐ and nano‐structures including particles, rods, ribbons, nanosheets, and soft dendritic colloids (dendricolloids) are identified. The outcomes are interpreted by delineating the physical processes into three stages: hydrodynamic shear, capillary and mechanical breakup, and polymer precipitation rate. The insights into the underlying fundamental mechanisms provide guidance toward developing a versatile and scalable nanofabrication platform. It is verified that the liquid shear‐based technique is versatile and works well with many chemically diverse polymers and biopolymers, showing potential as a universal tool for simple and scalable nanofabrication of many morphologically distinct soft matter classes.
纳米聚合物：制备、性能、应用
DOI：
--
发表时间：
2016
期刊：
影响因子：
--
作者：
S. Fakirov
通讯作者：
S. Fakirov
腈纶纤维的湿法和干喷湿法纺丝
DOI：
--
发表时间：
1982
期刊：
影响因子：
--
作者：
P. Nourpanah
通讯作者：
P. Nourpanah