Fig. 4: Biosynthesis, characterization and performance evaluation of bacterial cellulose-hexagonal boron nitride (BCBN) hybrid nanosheets.
From: Flow-induced 2D nanomaterials intercalated aligned bacterial cellulose
a Schematic of the biosynthesis process for growing in situ BCBN hybrid nanosheet using our rotational culture device. The partially enlarged schematic on the right shows boron nitride nanosheet (BNNS) diffusion in the shear flow and its intercalation in the fibrous BC network. b Optical photograph of the dried BCBN hybrid nanosheet. c Representative SEM image of BCBN showing intercalated BNNS within the BC network. Similar features were consistently observed across multiple regions of the same sample. d XRD comparison of BC, BNNS, and BCBN. e Statistical comparison of UTS, YM, and WoF of the BC sheets from static culture, rotational culture, and BCBN from rotational culture with the mean values noted atop. Bars represent mean values, and error bars indicate standard deviation (n = 3 independent samples per category). Statistical significance was assessed using two-sided one-way ANOVA. The double asterisk (**) denotes a statistically significant difference among the groups (p ≤ 0.01). p value for UTS is 0.0025. f Representative cross-section SEM image of the fracture surface of BCBN film shows both BC and BN pull-out. Similar features were consistently observed across multiple regions of the same sample. g Comparison of single line temperature profile from temperature mapping of BC and BCBN using IR camera under 25-mW laser illumination in air. The temperature profile shows higher temperature for BC compared to BCBN. Inset shows thermal mapping of control (left) and BCBN (right) samples under laser illumination. h Temporal heat dissipation behavior of BC and BCBN.
