Bionanocomposites: Differential Effects of Cellulose Nanocrystals on Protein Diblock Copolymers. Haghpanah, J., S., Tu, R., Da Silva, S., Yan, D., Mueller, S., Weder, C., Foster, E., J., Sacui, I., Gilman, J., W., & Montclare, J., K. BIOMACROMOLECULES, 14(12):4360-4367, AMER CHEMICAL SOC, 12, 2013.
abstract   bibtex   
We investigate the effects of mixing a colloidal suspension of tunicate-derived cellulose nanocrystals (t-CNCs) with aqueous colloidal suspensions of two protein diblock copolymers, EC and CE, which bear two different self-assembling domains (SADs) derived from elastin (E) and the coiled-coil region of cartilage oligomeric matrix protein (C). The resulting aqueous mixtures reveal improved mechanical integrity for the CE+t-CNC mixture, which exhibits an elastic gel network. This is in contrast to EC+t-CNC, which does not form a gel, indicating that block orientation influences the ability to interact with t-CNCs. Surface analysis and interfacial characterization indicate that the differential mechanical properties of the two samples are due to the prevalent display of the E domain by CE, which interacts more with t-CNCs leading to a stronger network with t-CNCs. On the other hand, EC, which is predominantly C-rich on its surface, does not interact as much with t-CNCs. This suggests that the surface characteristics of the protein polymers, due to folding and self-assembly, are important factors for the interactions with t-CNCs, and a significant influence on the overall mechanical properties. These results have interesting implications for the understanding of cellulose hydrophobic interactions, natural biomaterials and the development of artificially assembled bionanocomposites.
@article{
 title = {Bionanocomposites: Differential Effects of Cellulose Nanocrystals on Protein Diblock Copolymers},
 type = {article},
 year = {2013},
 identifiers = {[object Object]},
 pages = {4360-4367},
 volume = {14},
 month = {12},
 publisher = {AMER CHEMICAL SOC},
 city = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
 id = {84f3657e-e22b-3f82-bb66-4244315cbc4e},
 created = {2015-12-14T19:51:31.000Z},
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 last_modified = {2017-03-14T12:30:08.401Z},
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 abstract = {We investigate the effects of mixing a colloidal suspension of
tunicate-derived cellulose nanocrystals (t-CNCs) with aqueous colloidal
suspensions of two protein diblock copolymers, EC and CE, which bear two
different self-assembling domains (SADs) derived from elastin (E) and
the coiled-coil region of cartilage oligomeric matrix protein (C). The
resulting aqueous mixtures reveal improved mechanical integrity for the
CE+t-CNC mixture, which exhibits an elastic gel network. This is in
contrast to EC+t-CNC, which does not form a gel, indicating that block
orientation influences the ability to interact with t-CNCs. Surface
analysis and interfacial characterization indicate that the differential
mechanical properties of the two samples are due to the prevalent
display of the E domain by CE, which interacts more with t-CNCs leading
to a stronger network with t-CNCs. On the other hand, EC, which is
predominantly C-rich on its surface, does not interact as much with
t-CNCs. This suggests that the surface characteristics of the protein
polymers, due to folding and self-assembly, are important factors for
the interactions with t-CNCs, and a significant influence on the overall
mechanical properties. These results have interesting implications for
the understanding of cellulose hydrophobic interactions, natural
biomaterials and the development of artificially assembled
bionanocomposites.},
 bibtype = {article},
 author = {Haghpanah, Jennifer S and Tu, Raymond and Da Silva, Sandra and Yan, Deng and Mueller, Silvana and Weder, Christoph and Foster, E Johan and Sacui, Iulia and Gilman, Jeffery W and Montclare, Jin Kim},
 journal = {BIOMACROMOLECULES},
 number = {12}
}

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