Ordered deposition of nanocelluloses on the nematic ordered cellulose (NOC) was investigated in the viewpoint of the surface energy distribution of substrates. NOC is a unique template that induces oriented deposition of other objects due to the alternately aligned amphiphilic molecular tracks on its surface. To chenge the surface energy, styrene oligomers were introduced onto the cellulose molecular tracks on the surface of NOC by surface-initiated atom transfer radical polymerization. The introduced hydrophobic moieties were partly converted into hydrophilic by the following UV-irradiation. Surface energy of the resultant templates was quantitatively estimated based on contact angle measurements. Gluconacetobacter xylinus (G. xylinus) cells were then cultivated on the more hydrophilic NOC template above prepared. G. xylinus secreted bacterial cellulose (BC) that was deposited parallel to the oriented molecular tracks on the substrate similar to the original NOC, resulting in a linear movement pattern of the bacteria. However, decrease in the moving rate of G. xylinus and the morphology change of deposited BC indicated less attractive interaction engagements onto the more hydrophilic NOC templates comparing to the original NOC. This suggests that oriented deposition of BC on the NOC is presumably induced by strong hydrophobic interfacial interaction.

Oriented deposition of bacterial nanocellulose induced by nematic ordered cellulose templates with unique surface energy distribution

2019 Spring National Meeting

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