14 / 38
NanoMat 2018
Nano Research & Applications
ISSN: 2471-9838
Page 34
April 26-27, 2018
Rome, Italy
17
th
Edition of International Conference on
Emerging Trends in
Materials Science and
Nanotechnology
T
his study demonstrates the preparation of chitin nanofibers
from shrimp and crab wastes using different mechanical
treatments such as high speed blender and ultrasonic
homogenizer. FE-SEM image and microscopic image showed
that uniform fibrillated nanofibers having diameter of 30-50
nm can be obtained. The obtained chitin nanofibers were small
enough to retain the transparency of the neat acrylic resin.
Chitin acrylic resin films exhibited much higher transparency
than cellulose acrylic resin films. The incorporation of chitin
nanofibers contributes to the significant improvement of the
thermal expansion and mechanical properties of the neat acrylic
resin. Furthermore, by reinforcing chitin powder with acrylic
resin, optically transparent composites were developed, since
particles substantially larger than the optical wavelength do not
cause light scattering if the particles are composed of nano-
elements such as nanofibers and have nanoporous space so
that matrix resin impregnation is possible. Encouraged by these
findings, we developed low thermally expanded transparent
film by exploiting wood fibers that can be considered to be
nanostructured fibers in which individual nanofibers do not
significantly agglomerate and are orientated parallel to the fiber
direction in S2 layer which accounts for 70-80% of wood fibers.
In addition, three dimensional moldable optically transparent
nanocomposites with low thermal expansion through
emulsification process were developed. Emulsions of chitin
nanofibers and acrylic resin are stabilized by the hydrophilic and
high specific surface area chitin nanofiber networks preventing
the coalescence of tiny emulsion resin droplets. The properties
of high light transmittance and low thermal expansion make
chitin nanocomposites promising candidates for the substrate
in a continuous roll-to-roll process in the manufacturing of
various optoelectronic devices such as flat panel displays,
bendable displays, and solar cells. We are presently working
on deacetylated chitin nanofibers film which are embedded by
chitosan and could be suitable for bio-medical applications.
Recent Publications
1. S K Biswas, H Sano, M I Shams and H Yano (2017)
Three-dimensional-moldable nanofiber reinforced
transparent composites with a hierarchically self-
assembled “reverse” nacre-like architecture. ACS
Applied Materials and Interfaces 9(35):30177-30184
2. M I Shams and HYano (2015) Doubly curved nanofiber-
reinforced optically transparent composites. Scientific
Reports 5:16421
3. H Yano, S Sasaki, M I Shams, K Abe and T Date
(2014) Wood pulp based optically transparent film: A
Paradigm from nanofibers to nanostructured fibers.
Advanced Optical Materials 2(3):231-234
4. M I Shams and H Yano (2013) Simplified fabrication
of optically transparent composites reinforced with
nanostructured chitin. Journal of Polymers and the
Environment 21:937-943.
5. M I Shams, M Nogi, L Berglund and H Yano (2012)
The transparent crab: preparation and nanostructural
implications for bioinspired optically transparent
nanocomposites. Soft Matter 8:1369-1373.
Biography
Md. Iftekhar Shams has completed his MS and PhD in Wood Science and
Technology from Kyoto University, Japan under Japanese Government
Monbukagakushu scholarship. From 2008- 2010, he worked as JSPS Post-
doctoral fellow and later in 2012-2014, he worked as Visiting Scientist in
Kyoto University, Japan. He was also working as an invited Visiting Scientist
in Royal Institute of Technology Sweden, Nanjing Forestry University, China
and Kyoto University Japan. He holds two patents and has published more
than 35 journal articles. For greater contribution in the field of Forest and
Agricultural Science in Bangladesh, he was awarded ‘UGC AWARD 2015’
from University Grants Commission of Bangladesh. His research involves
production of biocomposites and extraction of nanofibers from biomass
resources and their utilization for optical and structural purposes. He also
handled a good number of funded projects includingWorld Bank sponsored,
Japan Society for the Promotion of Science (JSPS), The World Academy of
Sciences (TWAS) and so on. He is now working as a Professor of Forestry
and Wood Technology Discipline, Khulna University, Bangladesh.
shamsfwt75@gmail.comBio-based nanomaterials for diversified applications
Md. Iftekhar Shams
1
and
Hiroyuki Yano
2
1
Khulna University, Bangladesh
2
Research Institute for Sustainable Humanosphere - Kyoto University, Japan
Md. Iftekhar Shams et al., Nano Res Appl, Volume:4
DOI: 10.21767/2471-9838-C1-008