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Porosity-Tunable Structures with “Fossilized” Bubbles
ACS Applied Polymer Materials ( IF 5 ) Pub Date : 2020-01-21 , DOI: 10.1021/acsapm.9b00925
Lin Wang 1, 2, 3 , Miao Wang 1 , Guangchao Wan 3 , Xing Guo 3 , Xinwen Xie 1 , Wei Liu 1 , Yunmao Zhang 4 , Jing Fan 5 , Xu Hou 1, 4, 6, 7 , Zi Chen 3
Affiliation  

Porous structures have garnered increasing attention in recent research on lightweight, multifunctional materials that enable a wide range of applications including separation, adsorption, sensing, pervaporation, and reactions. Here we report a versatile method for creating noninterconnected, porous structures with tunable pore size distributions by “fossilizing” bubbles in the curing matrix. The bubbles are generated from a pressure-driven flow of air/vapor through a template with micrometer-scaled channels. Tunable fabrication of porous materials with adjustable pore size and pore distribution can be achieved by controlling the pressure difference and the templates’ design. To quantitatively guide the synthesis of the porous structures, we develop a theoretical model to predict the pore size, which agrees with experiments. Moreover, by maneuvering the pore size distributions of this structure on demand, we demonstrate its feasibility as a differential thermal insulator that can be utilized in various fields such as microfluidic chips and microreactors. Overall, this facile method provides a strategy for fabricating lightweight porous structures that have broad applications in microfluidics, thermal insulation, separation science, and tissue engineering.

中文翻译:

具有“僵化”气泡的孔隙率可调结构

在最近的轻质,多功能材料研究中,多孔结构引起了越来越多的关注,该材料能够实现广泛的应用,包括分离,吸附,传感,渗透和反应。在这里,我们报告了一种通用的方法,该方法通过“固化”固化基体中的气泡来创建具有可调孔径分布的非互连多孔结构。气泡是由压力/驱动的空气/蒸汽流通过带有微米级通道的模板产生的。通过控制压差和模板的设计,可以实现孔径和孔分布可调的多孔材料的可调谐制造。为了定量指导多孔结构的合成,我们建立了理论模型来预测孔径,这与实验相符。此外,通过根据需要调整该结构的孔径分布,我们证明了其作为差分绝热材料的可行性,该绝热材料可用于各种领域,例如微流控芯片和微反应器。总体而言,这种简便的方法提供了一种制造轻型多孔结构的策略,该结构在微流体,隔热,分离科学和组织工程中具有广泛的应用。
更新日期:2020-01-22
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