Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan.
Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, 24301, Taiwan.
Nat Commun. 2018 Jul 2;9(1):2564. doi: 10.1038/s41467-018-04975-2.
The vapor deposition of polymers on regular stationary substrates is widely known to form uniform thin films. Here we report porous polymer particles with sizes controllable down to the nanometer scale can be produced using a fabrication process based on chemical vapor deposition (CVD) on a dynamic substrate, i.e., sublimating ice particles. The results indicate that the vapor deposition of a polymer is directed by the sublimation process; instead of forming a thin film polymer, the deposited polymers replicated the size and shape of the ice particle. Defined size and porosity of the polymer particles are controllable with respect to varying the processing time. Extendable applications are shown to install multiple functional sites on the particles in one step and to localize metals/oxides forming composite particles. In addition, one fabrication cycle requires approximately 60 min to complete, and potential scaling up the production of the porous particles is manageable.
众所周知，聚合物在规则固定基底上的气相沉积会形成均匀的薄膜。在这里，我们报告了一种使用基于动态基底（即升华冰颗粒）的化学气相沉积（CVD）的制造工艺，可以生产尺寸可控至纳米级的多孔聚合物颗粒。结果表明，聚合物的气相沉积受升华过程的控制；沉积的聚合物不是形成薄膜聚合物，而是复制了冰颗粒的大小和形状。通过改变处理时间，可以控制聚合物颗粒的尺寸和孔隙率。展示了可扩展的应用，即在一个步骤中在颗粒上安装多个功能位点，并将金属/氧化物定位形成复合颗粒。此外，一个制造循环大约需要 60 分钟完成，并且可以控制多孔颗粒的大规模生产。
