4th EucheMs chemistry congress

Poster Session 1
s1106
chem. Listy 106, s587–s1425 (2012)
Poster session 1 - organic chemistry
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SyntheSiS of nonAPePtide (B22-B30) of inSuLin
B-ChAin uSinG Modified SoLid PhASe MethodS
with And without MiCrowAve teChnique
M. zewAiL 1 , A. nAGLAh 1 , S. ABdeL rAhMAn 2
1 National Research Center, Peptide Chemistry, Cairo, Egypt
2 Faculty of Science Zagazig University, Chemistry, Zagazig,
Egypt
The biological activity of Insulin is known to be closely
related to the C-terminal nonapeptide (B -B ) fragment of its
22 30
B-chain. This does not necessarily mean, however, that each of
the amino acid residues of the nonapeptide fragment is essential
for its activity.
Keywords: Insulin; Peptide; Amino Acids; Modified Solid
Phase and Microwave.;
4 th EucheMs chemistry congress
P - 0 4 9 0
eLeCtroCheMiCAL ChArACterizAtion of
Pvdf BASed PoLyMer eLeCtroLyteS for
SeCondAry BAtterieS
e. zeytuni 1 , M. h. uGur 1 , e. CAKMAKCi 1 ,
A. GunGor 1
1 Institute of Science, Chemistry, Istanbul, Turkey
PVDF-based polymer electrolytes have many different uses
according to the intended use. For example; also being used as
electrolyte in rechargeable batteries [1] , they can also be used in
fuel batteries (electrolyte), [2] besides, they can be used as a binder
for the preparation of cathode material in rechargeable batteries, [4]
as an electrolyte for supercapacitor applications [5] and as polymer
electrolytes in solar batteries. [6]
The chemical and the thermal stability that the PVDF-based
gel polymers show, make such type of materials attractive for
battery and fuel cell applications. Being among the cheapest
fluoropolymers and having a wide melting point range
(115 °C–175 °C), PVDF is a processable polymer which also has
properties such as low surface tension [referans]
In this study; the electrochemical stability window of the
membrane has been evaluated with the recyclable voltametry
technique using the 3 (triple) electrode system. All
electrochemical measurements have been performed within glove
box (argon gas cabin). Ac conductivity values of the membranes
containing with Li salts have been found within the range of
10-5 –10-6 S/cm. In this study lithium salts such as LiClO , LiPF 4 6
and LiBF were used by dissolving them in solvents like
4
PC(propylene carbonate), EC (ethylene carbonate),
DEC(diethylene carbonate). The obtained polymer electrolyte
membrane has been characterized in Li (anode)?Polymer
electrolyte?LiCoO2(cathode) battery assembly.
references:
1. M-K. Song, Y-T. Kim, B. W. Cho, B. N. Popov and
Hee-Woo Rhee,Thermally Stable Gel Polymer
Electrolytes, Journal of The Electrochemical Society,
Vol. 150, Issue 4, pp. A439–A444,2003
2. B. Ameduri, From Vinylidene Fluoride (VDF) to the
Applications of VDF-Containing Polymers and
Copolymers, Recent Developments and Future Trends,
Chemical Reviews, 109, 6632–6686, 2009
3. Dong-Min Im, Young-Min Choi, Gue-Sung Kim,
Hyo-Sugtee, Jung-Jong Park,Cathode Active Material for
Lithium Rechargeable Battery and Lithium Rechargeable
Battery Using The Same, United States Patent, US7, 601,
462 B2, 2009
4. Ionic liquid incorporated polymer electrolytes for
supercapacitor application, G. P. Pandey, Y. Kumar,
S. A. Hashmi; Indian Journal of Chemistry, Vol. 49A, pp.
743–751, 2010
5. YW Chen-Yang *; YT Chen; CC Lia; HC Yu; YC Chuang;
CH Su, YT Lin,Preparation of UV-filter Encapsulated
Mesoporous Silica with High Sunscreen Ability, Mater.
Lett., Vol.65, No.6 p.1060–1062, 2011
Keywords: rechargeable battery; ionic conductivity; gel
polymer electrolyte;
AUGUst 26–30, 2012, PrAGUE, cZEcH rEPUbLIc