Synthesis and Fabrication of Nanocomposite Fibers of Collagen-Cellulose Nanocrystals by Coelectrocompaction

Elvis Cudjoe; Mousa Younesi; Edward Cudjoe; Ozan Akkus; Stuart J. Rowan

doi:10.1021/acs.biomac.7b00005

Synthesis and Fabrication of Nanocomposite Fibers of Collagen-Cellulose Nanocrystals by Coelectrocompaction

Elvis Cudjoe, Mousa Younesi, Edward Cudjoe, Ozan Akkus^*, Stuart J. Rowan

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

An electrochemical process has been used to compact cellulose nanocrystals (CNC) and access aligned micron-sized CNC fibers. Placing a current across aqueous solutions of carboxylic acid functionalized CNCs (t-CNC-COOH) or carboxylic acid/primary amine functionalized CNCs (t-CNC-COOH-NH₂) creates a pH gradient between the electrodes, which results in the migration and concentration of the CNC fibers at their isoelectric point. By matching the carboxylic acid/amine ratio of CNCs and collagen (ca. 30:70 carboxylic acid:amine ratio), it is possible to coelectrocompact both nanofibers and access aligned nanocomposite fibers. t-CNC-COOH-NH₂/collagen fibers showed a maximum increase in mechanical properties at 5 wt % of t-CNC-COOH-NH₂. Compared to collagen/CNC films which have no alignment in the plane of the films, the tensile properties of the aligned fibers show a significant enhancement in the wet mechanical properties (40 MPa vs 230 MPa) for the 5 wt % of t-CNC-COOH-NH₂/collagen films and fiber, respectively.

Original language	English
Pages (from-to)	1259-1267
Number of pages	9
Journal	Biomacromolecules
Volume	18
Issue number	4
DOIs	https://doi.org/10.1021/acs.biomac.7b00005
Publication status	Published - 2017 Apr 10
Externally published	Yes

ASJC Scopus subject areas

Bioengineering
Biomaterials
Polymers and Plastics
Materials Chemistry

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10.1021/acs.biomac.7b00005

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abstract = "An electrochemical process has been used to compact cellulose nanocrystals (CNC) and access aligned micron-sized CNC fibers. Placing a current across aqueous solutions of carboxylic acid functionalized CNCs (t-CNC-COOH) or carboxylic acid/primary amine functionalized CNCs (t-CNC-COOH-NH2) creates a pH gradient between the electrodes, which results in the migration and concentration of the CNC fibers at their isoelectric point. By matching the carboxylic acid/amine ratio of CNCs and collagen (ca. 30:70 carboxylic acid:amine ratio), it is possible to coelectrocompact both nanofibers and access aligned nanocomposite fibers. t-CNC-COOH-NH2/collagen fibers showed a maximum increase in mechanical properties at 5 wt % of t-CNC-COOH-NH2. Compared to collagen/CNC films which have no alignment in the plane of the films, the tensile properties of the aligned fibers show a significant enhancement in the wet mechanical properties (40 MPa vs 230 MPa) for the 5 wt % of t-CNC-COOH-NH2/collagen films and fiber, respectively.",

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AU - Akkus, Ozan

AU - Rowan, Stuart J.

PY - 2017/4/10

Y1 - 2017/4/10

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AB - An electrochemical process has been used to compact cellulose nanocrystals (CNC) and access aligned micron-sized CNC fibers. Placing a current across aqueous solutions of carboxylic acid functionalized CNCs (t-CNC-COOH) or carboxylic acid/primary amine functionalized CNCs (t-CNC-COOH-NH2) creates a pH gradient between the electrodes, which results in the migration and concentration of the CNC fibers at their isoelectric point. By matching the carboxylic acid/amine ratio of CNCs and collagen (ca. 30:70 carboxylic acid:amine ratio), it is possible to coelectrocompact both nanofibers and access aligned nanocomposite fibers. t-CNC-COOH-NH2/collagen fibers showed a maximum increase in mechanical properties at 5 wt % of t-CNC-COOH-NH2. Compared to collagen/CNC films which have no alignment in the plane of the films, the tensile properties of the aligned fibers show a significant enhancement in the wet mechanical properties (40 MPa vs 230 MPa) for the 5 wt % of t-CNC-COOH-NH2/collagen films and fiber, respectively.

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Synthesis and Fabrication of Nanocomposite Fibers of Collagen-Cellulose Nanocrystals by Coelectrocompaction

Abstract

ASJC Scopus subject areas

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