Hybrid Rigid/Soft and Biologic/Synthetic Materials: Polymers Grafted onto Cellulose Microcrystals

Rigid nanoscale polymer rods were prepared by grafting preformed amine-terminated poly(styrene) and poly(tert-butyl acrylate) onto oxidized cellulose microcrystals. Low polydispersity polymers, grown using atom transfer radical polymerization, were characterized and purified prior to cellulose attac...

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Bibliographic Details
Published in:Biomacromolecules Vol. 12; no. 4; pp. 1214 - 1223
Main Authors: Harrisson, Simon, Drisko, Glenna L., Malmstrom, Eva, Hult, Anders, Wooley, Karen L.
Format: Journal Article
Language:English
Published: WASHINGTON Amer Chemical Soc 11.04.2011
Subjects:
Amides - chemistry
Biochemistry & Molecular Biology
Cellulose - chemistry
Chemistry
Chemistry, Organic
Crystallization
Life Sciences & Biomedicine
Magnetic Resonance Spectroscopy
Microscopy, Atomic Force
Microscopy, Electron, Transmission
Physical Sciences
Polymer Science
Polymers - chemistry
Science & Technology
FIBER
NANOCOMPOSITES
SUSPENSIONS
STARCH
NANOCRYSTALS
SURFACE MODIFICATION
ATRP
ISSN:1525-7797, 1526-4602, 1526-4602
Online Access:Get more information
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Summary:Rigid nanoscale polymer rods were prepared by grafting preformed amine-terminated poly(styrene) and poly(tert-butyl acrylate) onto oxidized cellulose microcrystals. Low polydispersity polymers, grown using atom transfer radical polymerization, were characterized and purified prior to cellulose attachment. Oxidation of the cellulose microcrystal led to the formation of carboxylic acids on the surface of the microcrystals. Covalent attachment of the polymers onto the cellulose microcrystals was achieved via a carbodiimide-mediated amidation reaction. The length and diameter of the polymer-cellulose composites increased upon surface modification. Typically, polymer-cellulose composites are synthesized by a grafting-from method because it can be difficult to obtain sufficient graft density using a grafting-to preparation. However, the composites reported here comprised 60-64% grafted polymer by mass. This degree of grafting-to allowed the composite to form stable suspensions in organic solvents.
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ISSN:1525-7797
1526-4602
1526-4602
DOI:10.1021/bm101506j