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Universiti pertahanan nasional malaysia
4
laporan tahunan 2014
4
88
P e n y e l i d i k a n
d a n I n o v a s i
7
Bil
Penyelidik
Anugerah
Tajuk Penyelidikan/ Projek
Ringkasan Produk
18
19
CELLULOSE NANO-CRYSTALS
(CNC) FROM NATURAL BIO-BASED
CELLULOSE FOR DEFENCE AND
SECURITY APPLICATION
GREEN COMPOSITE CELLULOSE
ACETATE POLYMER ELECTROLYTES
(CAPE) FOR APPLICATION IN
ELECTROCHEMICAL DEVICES
Cellulose is one of the most abundant biomass
material in nature extracted from natural fibers.
Its hierarchical structure allows different kinds of
cellulose nanocrystals (CNC) fillers to be obtained
known as cellulose microfibril/nanofibril (CMNF).
CNC is generally prepared by either physical
treatment, e.g, by a high pressure homogenizer
and/or high pressure refiner, or chemical
treatments, e.g, acid hydrolysis. CNC has
unique features, interesting for the development
of new materials: the abundance of the source
cellulose, its renewability and environmentally
benign nature, its mechanical properties and its
nano-scale dimensions open a wide range of
possible properties to be discovered. Polymers
derived from plants, especially those from
non-food resources, are gaining the attention of
governments, industries and institutes, primarily
due to their environmental compatibility, superior
physical properties and low stable market prices
which are becoming competitive with petroleum-
derived polymers. The only reinforcing material
that is stronger than cellulose nanocrystals is a
carbon nanotube, which costs about 100 times
as much. This study may produce new methods
for preparation of materials and materials needed
for some military gears. The modification of
crystalline CMNF offers the possibility of producing
composites with improved properties. The
preparation techniques can be scaled- up at
industrial quantities. The gained knowledge could
be applied in further research for exploitation of
new sources of cellulose and preparation of new
materials.
This innovation focuses on the preparation and
characterization of salted cellulose acetate (CA
complexes, plasticized salted CA, and composited
CA polymer electrolytes. CA-salt complexes were
first prepared by dissolving cellulose acetate (CA)
in an appropriate solvent using various weight
percentages of ammonium and lithium salt.
Different concentrations of plasticizer were then
added to the solution with the highest conductivity.
All samples were prepared using solution cast
technique. The plasticized CA-salt had the highest
conductivities at 10-3 - 10-2 S cm-1. Different
types of filler were dispersed to form a composite
CAPE with prominent enhancement of its physical
and electrical properties for use in electrochemical
devices such as dye-sensitized solar cell (DSSC)
and lithium-air batteries. The performance results
of the electrochemical devices showed that
these green composite cellulose acetate polymer
electrolytes (CAPE) had a huge potential to be
commercialized.
Prof. Dr. Fauziah Binti
Haji Abdul Aziz
Prof. Dr. Muhd Zu
Azhan Bin Yahya
GOLD
SILVER
(Sambungan) Jadual 40: Anugerah dan Pencapaian Penyelidik Pada MTE 2014