Charge- and Size-Selective Molecular Separation using Ultrathin Cellulose Membranes

Tiara Puspasari, Haizhou Yu, Klaus-Viktor Peinemann

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

To date, it is still a challenge to prepare high-flux and highselectivity microporous membranes thinner than 20 nm without introducing defects. In this work, we report for the first time the application of cellulose membranes for selective separation of small molecules. A freestanding cellulose membrane as thin as 10 nm has been prepared through regeneration of trimethylsilyl cellulose (TMSC). The freestanding membrane can be transferred to any desired substrate and shows a normalized flux as high as 700 L m−2 h−1 bar−1 when supported by a porous alumina disc. According to filtration experiments, the membrane exhibits precise size-sieving performances with an estimated pore size between 1.5–3.5 nm depending on the regeneration period and initial TMSC concentration. A perfect discrimination of anionic molecules over neutral species is demonstrated. Moreover, the membrane demonstrates high reproducibility, high scale-up potential, and excellent stability over two months.
Original languageEnglish (US)
Pages (from-to)2908-2911
Number of pages4
JournalChemSusChem
Volume9
Issue number20
DOIs
StatePublished - Aug 30 2016

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