This paper highlights top-down and bottom-up approaches to generate ultra-fine cellulose fibers of nano-scale dimensions, micro-porous, meso-porous and shealth-core hybrid structures as well as surface active fibrous materials. Dissolved cellulose derivatives have been facilely electrospun into homogeneous or 1D to 3D hybrid fibrous membranes that could be easily converted to cellulose, nanocomposites and porous fibers. Highly crystalline Ib nanocellulose in varied geometries and surface chemistries have been efficiently derived via diverse ways to exhibit unique dispersing and emulsifying properties for oil-water emulsions, coagulants for microbes as well as templates for nanoparticles and nanoprisms. These nanocelluloses could also be assembled into new fibrous structures, super-absorbent hydrogels and amphiphilic aerogels for applications, such as nano-composites, oil recovery and separation, water purification, etc. While these ultra-fine fibers from these two approaches share some similar fibrous morphologies, their crystalline structures, thermal behavior and chemical functionalities are distinctively different, offering a wide range of characteristics as novel functional materials.    <br/>

Strategies toward cellulose nanofibers, porous fibers and hybrids

253rd National Meeting (2017)

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