Polymer Materials Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, Japan.
Science. 2012 Jan 27;335(6067):444-7. doi: 10.1126/science.1212101.
Chemical, petrochemical, energy, and environment-related industries strongly require high-performance nanofiltration membranes applicable to organic solvents. To achieve high solvent permeability, filtration membranes must be as thin as possible, while retaining mechanical strength and solvent resistance. Here, we report on the preparation of ultrathin free-standing amorphous carbon membranes with Young's moduli of 90 to 170 gigapascals. The membranes can separate organic dyes at a rate three orders of magnitude greater than that of commercially available membranes. Permeation experiments revealed that the hard carbon layer has hydrophobic pores of ~1 nanometer, which allow the ultrafast viscous permeation of organic solvents through the membrane.
化工、石油化工、能源和环境相关行业强烈需要适用于有机溶剂的高性能纳滤膜。为了实现高溶剂透过率，过滤膜必须尽可能薄，同时保持机械强度和耐溶剂性。在这里，我们报告了具有 90 至 170 千兆帕斯卡杨氏模量的超薄独立无定形碳膜的制备。该膜可以以比市售膜高三个数量级的速率分离有机染料。渗透实验表明，硬碳层具有约 1 纳米的疏水性孔，允许有机溶剂通过膜进行超快粘性渗透。
