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.com
Volume 5, Issue 3 (Suppl)
Mod Chem Appl, an open access journal
ISSN: 2329-6798
Global Chemistry 2017
September 04-06, 2017
September 04-06, 2017 | London, UK
5
th
Global Chemistry Congress
Carbon dot - Unique reinforcing filler for polymer with special reference to physico-mechanical
properties
Dinesh Kumar Kotnees, P R Sreenath, Seema Singh, M S Satyanarayana
and
Prolay Das
Indian Institute of Technology, Patna, India
T
his work reports the reinforcing efficiency of carbon dots (CDs) in carboxylated acrylonitrile butadiene (XNBR) latex
at very low concentration. Amine and carboxyl functionalized CDs have been synthesized from citric acid and glycine.
The CDs are covalently conjugated to XNBR latex using 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride
(EDC.HCl) and N-hydroxysuccinimide (NHS) as coupling agents. The covalent conjugation of CDs with XNBR latex has
been confirmed by Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) and X-ray photoelectron
spectroscopy (XPS). The optical properties of CDs and XNBR-CDs conjugate have been characterized by ultraviolet (UV)
- visible, fluorescence spectroscopy, time-resolved fluorescence spectrophotometer and haze meter. The tensile stress-strain
properties of XNBR latex dramatically increases by the addition of CDs to XNBR latex. The maximum tensile stress of 2 phr
of CDs loaded XNBR latex is nearly 215 % higher than the maximum tensile stress of neat XNBR latex. There is a concomitant
decrease in the tan δ peak height and increase in the tan δ peak temperature of XNBR latex with the incorporation of CDs to
XNBR latex. In addition, the storage modulus (G') value of sample containing 2 phr of CDs is 161 % higher than the storage
modulus value (G') of neat XNBR latex. The onset of degradation temperature (Ti) value of sample containing 4 phr of CDs
is 40 C higher than the Ti value of neat XNBR latex. On the other hand, the maximum degradation temperature (Tmax) of
XNBR latex containing 1 phr of CDs is 11 C higher than the Tmax value of neat XNBR latex. Morphology of pristine CDs and
XNBR-CDs conjugate has been analyzed using transmission electron microscopy (TEM). To the best of our knowledge, this is
the first report which analyzes the effect of CDs on the physico-mechanical properties of elastomer contrary to the other novel
fillers of carbon family.
dineshvnr@gmail.comMod Chem Appl 2017, 5:3(Suppl)
DOI: 10.4172/2329-6798-C1-006