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Self-Assembly-Directed Aerogel and Membrane Formation from a Magnetic Composite: An Approach to Developing Multifunctional Materials
Balachandran Vivek,
Published in American Chemical Society
2017
PMID: 28166624
Volume: 9
   
Issue: 8
Pages: 7619 - 7628
Abstract
Herein, we report the preparation of an aerogel and a membrane from a magnetic composite material by tuning the self-assembly at the molecular level. The gel exhibits an excellent oil absorption property, and the membrane shows a remarkable autonomous self-healing property. The composite is formed from an organosilicon-modified poly(amidoamine) (PAMAM) dendrimer, which is linked with iron oxide nanoparticles and poly(vinyl alcohol). Upon the addition of a cross-linker (formaldehyde), the system undergoes a fast self-assembly and gelation process. The aerogel, obtained after drying of the hydrogel, was modified with 1- bromohexadecane at room temperature and utilized for the removal of oil from water with 22.9 g/g absorption capacity. Intriguingly, the same system forms a membrane with 97% autonomous self-healing ability, in the absence of the cross-linker. The membrane was used to remove the salt content from water with an efficiency of 85%. The control experiments suggest that the presence of the magnetic material (iron oxide) plays a key role in the formation of both the aerogel and membrane. © 2017 American Chemical Society.
About the journal
JournalData powered by TypesetACS Applied Materials and Interfaces
PublisherData powered by TypesetAmerican Chemical Society
ISSN19448244
Open AccessNo
Concepts (21)
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    Aerogels
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    Dendrimers
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    Desalination
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    Gelation
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    Iron oxides
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    Magnetic materials
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    Magnetism
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    Membranes
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    Polyvinyl alcohols
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    Water absorption
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    WATER FILTRATION
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    Water pollution
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    AUTONOMOUS SELF-HEALING
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    MAGNETIC COMPOSITE MATERIALS
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    Multi-functional materials
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    OIL REMOVAL
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    ORGANOSILICONES
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    Polyamidoamine dendrimers
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    Self-healing
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    WATER DESALINATION
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    Self assembly