Hydrophobic polyamide nanofilms provide rapid transport for crude oil separation
Hydrophobic polyamide nanofilms provide rapid transport for crude oil separation
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DOI：
10.1126/science.abq0598
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发表时间：
2022-09-30
期刊：
影响因子：
56.9
通讯作者：
Livingston, Andrew G.
中科院分区：
文献类型：
--
作者：
Li, Siyao;Dong, Ruijiao;Livingston, Andrew G.
碳氢化合物分离依赖于能源密集型蒸馏。膜技术可以提供一种节能的替代方案，但需要对原油分子进行选择性区分，并进行快速液体输送。我们合成了多嵌段低聚物胺，它包括一个中心胺段与两个疏水低聚物嵌段，并使用它们从自组装囊泡通过界面聚合制备疏水聚酰胺纳米膜。这些聚酰胺纳米膜提供疏水性液体的传输速度比常规亲水性对应物快100倍以上。在轻质原油的分馏中，将膜厚度控制到类似于10纳米，实现了比当前最先进的疏水膜高一个数量级的渗透率，同时保持了可比较的基于尺寸和类别的分离。这种高渗透性可以显著减少工厂占地面积，这扩大了在原油分馏中使用由纳米薄膜制成的膜的潜力。
Hydrocarbon separation relies on energy-intensive distillation. Membrane technology can offer an energy-efficient alternative but requires selective differentiation of crude oil molecules with rapid liquid transport. We synthesized multiblock oligomer amines, which comprised a central amine segment with two hydrophobic oligomer blocks, and used them to fabricate hydrophobic polyamide nanofilms by interfacial polymerization from self-assembled vesicles. These polyamide nanofilms provide transport of hydrophobic liquids more than 100 times faster than that of conventional hydrophilic counterparts. In the fractionation of light crude oil, manipulation of the film thickness down to similar to 10 nanometers achieves permeance one order of magnitude higher than that of current state-of-the-art hydrophobic membranes while retaining comparable size- and class-based separation. This high permeance can markedly reduce plant footprint, which expands the potential for using membranes made of ultrathin nanofilms in crude oil fractionation.