期刊
ACS NANO
卷 13, 期 10, 页码 11097-11106出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b03670
关键词
supramolecular materials; self-assembly; membranes; ultrafiltration; nanofiltration; biocatalysis
类别
资金
- Israel Science Foundation
- Helen and Martin Kimmel Center for Molecular Design
- Adams Fellowship
- Livio Norzi Professorial Chair in Materials Science
In view of their facile fabrication and recycling, functional materials that are built from small molecules (molecular plastics) may represent a cost-efficient and sustainable alternative to conventional covalent materials. We show how molecular plastics can be made robust and how their (nano)structure can be tuned via modular construction. For this purpose, we employed binary composites of organic nanocrystals based on a perylene diimide derivative, with graphene oxide (GO), bentonite nanoclay (NC), or of the membranes. The hybrids are prepared via a simple aqueous or hydroxyethyl cellulose (HEC), that both reinforce and enable tailoring properties the deposition method, exhibit enhanced mechanical robustness, and can be recycled. We utilized these properties to create separation membranes with tunable porosity that are easy to fabricate and recycle. Hybrids 1/HEC and 1/NC are capable of ultrafiltration, and 1/NC removes heavy metals from water with high efficiency. Hybrid 1/GO shows mechanical properties akin to covalent materials with just 2-10% (by weight) of GO. This hybrid was used as a membrane for immobilizing beta-galactosidase that demonstrated long and stable biocatalytic activity. Our findings demonstrate the utility of modular molecular nanoplastics as robust and sustainable materials that enable efficient tuning of structure and function and are based on self-assembly of readily available inexpensive components.
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