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Liquid Crystalline Electrospun Fibers

Biomimicking properties are present not only in films but also in fibers produced from cellulosic materials in the liquid crystal phase. These biomimetic fibers, when compared with films, have the advantage of having a much higher surface area and were produced for the first time by Canejo et at [88] using electrospinning. [Pg.227]

Cellulose being an abundant and renewable polymer is a natural candidate to supply [Pg.227]

The great majority of published works involving electrospinning report the production of fibers from an isotropic phase and not from liquid crystalline solutions. This could be explained by the high viscosity that is associated with the relatively high polymer concentration needed for the formation of the mesophase. In the case of cellulosic [Pg.227]

The first published work involving cellulosic fibers electrospxm from a liqxiid crystal phase [88] described the production of acetoxypropylcellxilose (APC) fibers from an anisotropic solution that used dimethylacetamide as solvent, with a concentration of 60 wt% in polymer. [Pg.228]

Observation of the electrospun fibers by means of scanning electron and atomic force microscopies showed that the electrospxm fibers exhibited a spontaneous twist along the fiber axis that is not present in fibers electrospxm from the isotropic phase. Fibers with a twist are shown in Figxires 8.13 and 8.14. [Pg.228]


Cellulose is the most abundant biopolymer on earth. It can be used in different applications, namely in the form of fibers, and cellulose can be converted into numerous cellulose derivatives. Cellulose micro- and nanofibers have been the subject of intense research in the field of composites. Cellulose derivatives can show liquid crystalline chiral nematic phases, which can be used for the production of diverse composite systems. All-cellulosic composites based on liquid crystalline cellulosic matrices reinforced by cellulose micro- and nanofibers can show enhanced mechanical properties due to fiber orientation induced by the liquid crystalline matrix. Cellulose-based fibers electrospun from liquid crystalline phases can develop different structures, which are able to mimic the shape of plant tendrils on the nano- and microscale, opening new horizons for ceDulosic membrane applications. [Pg.215]


See other pages where Liquid Crystalline Electrospun Fibers is mentioned: [Pg.227]    [Pg.227]    [Pg.63]    [Pg.203]    [Pg.273]    [Pg.346]    [Pg.347]    [Pg.204]    [Pg.336]   


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