Abstracts Book - IMRC 2018

• SB1-O027 Invited Talk
NANOCELLULOSES: 1D CRYSTALLINE BUILDING BLOCKS FOR
MULTI-FUNCTIONAL MATERIALS
You-Lo Hsieh 1
1 University of California, Davis, Fiber and Polymer Science, United States.
Cellulose is nature’s most abundant polymer and has long been in use in its
native form of fibers or pulp. As cellulose is non-thermoplastic and insoluble in
common solvents, its transformation into other structures, new materials or
functional properties has been challenging and requires chemical modification
into derivatives. Nanocelluloses, the one dimensional (1 D) nano-rods or
nanofibrils isolated by chemical, biochemical and/or mechanical means native
sources, retain the crystalline domains while offer high specific surface and new
chemistry. This paper presents ways to generate nanocelluloses in diverse
geometries and designed surface chemistries under-utilized biomass and as
nano-building blocks for 2 D and 3 D architectures and hybrids. These
nanocelluloses are amphiphilic as well as tunable to be either more hydrophobic
or hydrophilic and charge densities for applications as emulsifiers, organic
dispersing agents, coagulants, antimicrobials, and templates for nanoparticles
and nanoprisms. Self-assembling approaches have been exploited to create
unique morphologies of nanofibers and fibrous networks, thin films, superabsorbent
hydrogels and amphiphilic aerogels, etc. Nanocellulose aerogels are
ultra-light (1-8 mg/cc), super-absorbent of aqueous and organic liquids (250-375
g/g), excellent resiliency saturated, and tunable amphiphilic-to-hydrophobic
characteristics for oil-water separation, hydrocarbon recovery and
water/chemical purification among others. Biological nanomaterial innovations
have great promise to meet future demand in novel and sustainable materials
as well as to minimize negative environmental impact our food and energy
supply chain.
Acknowledgment: Funding USDA-NIFA, NSF, NIH, CAPES, California Rice
Research Board, Chevron and AgTech Innovation Center and research
contributions F. Jiang, P. Lu, J. Gu, G. Patterson, J. Fukuda, J. Zhou and X. Xu are
greatly appreciated.
Keywords: Nanocelluloses, self-asssembled architecture, tunable surface chemistries
Presenting authors email: ylhsieh@ucdavis.edu