Bioengineering bacterial cellulose/poly(ethylene oxide) nanocomposites.

Bioengineering bacterial cellulose/poly(ethylene oxide) nanocomposites. Research Abstract Details 

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Bioengineering bacterial cellulose/poly(ethylene oxide) nanocomposites. Abstract Text:

Elvie E Brown,Marie-Pierre G Laborie,Elvie E Brown,Marie-Pierre G Laborie,Elvie E Brown,Marie-Pierre G Laborie,

By adding poly(ethylene oxide) (PEO) to the growth medium of Acetobacter xylinum, finely dispersed bacterial cellulose (BC)/PEO nanocomposites were produced in a wide range of compositions and morphologies. As the BC/PEO w/w ratio increased from 15:85 to 59:41, the cellulose nanofibers became smaller but aggregated in larger bundles, indicating that PEO mixed with the cellulose on the nanometer scale. Fourier transform infrared spectroscopy suggested intermolecular hydrogen bonding and also preferred crystallization into cellulose Ibeta in the BC/PEO nanocomposites. The fine dispersion of cellulose nanofibers hindered the crystallization of PEO, lowering its melting point and crystallinity in the nanocomposites although remaining bacterial cell debris also contributed to the melting point depression. The decomposition temperature of PEO also increased by approximately 15 degrees C, and the tensile storage modulus of PEO improved significantly especially above 50 degrees C in the nanocomposites. It is argued that this integrated manufacturing approach to fiber-reinforced thermoplastic nanocomposites affords a good flexibility for tailoring morphology and properties. These results further pose the question of the necessity to remove bacterial cells to achieve desirable materials properties in biologically derived products.

Bioengineering bacterial cellulose/poly(ethylene oxide) nanocomposites. Publishing Authors By Initials

EE Brown,MP Laborie,EE Brown,MP Laborie,EE Brown,MP Laborie,

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Bioengineering bacterial cellulose/poly(ethylene oxide) nanocomposites. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Biomacromolecules

VOLUME: 8

Page Numbers: 3074-81

Journal Abbreviation: Biomacromolecules

ISSN: 1525-7797

DAY: 1

MONTH: 09

YEAR: 2007

Bioengineering bacterial cellulose/poly(ethylene oxide) nanocomposites. Information

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LANGUAGE: eng

NlmUniqueID: 100892849

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Grant and Affiliation Information for Bioengineering bacterial cellulose/poly(ethylene oxide) nanocomposites.

AFFILIATION: Wood Materials and Engineering Laboratory, Washington State University, Pullman, WA 99164-1806, USA.

Country: United States

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MEDLINETA: Biomacromolecules

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