Shear-induced unidirectional deposition of bacterial cellulose microfibrils using rising bubble stream cultivation.
作者： Inseok Chae , Syed M.Q. Bokhari , Xing Chen , Rui Zu , Ke Liu
DOI: 10.1016/J.CARBPOL.2020.117328
关键词: Polar alignment 、 Bubble 、 Materials science 、 Shear stress 、 Crystal 、 Composite material 、 Material properties 、 Bacterial cellulose 、 Cellulose 、 Shear (geology)
摘要: Abstract In crystalline cellulose I, all glucan chains are ordered from reducing ends to non-reducing ends. Thus, the polarity of individual is added forming a large dipole within crystal. If one can engineer unidirectional alignment (parallel packing) crystals, then it might be possible utilize material properties originating polar structures. However, most post-synthesis manipulation methods reported so far only achieve uniaxial with bi-directionality (antiparallel packing). Here, we report method induce parallel packing bacterial microfibrils by applying shear stress during synthesis and deposition through rising bubble stream in culture medium. Driving force for explained mathematical estimation stress. Evidences Iα domains were obtained using nonlinear optical spectroscopy techniques.
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