Page 107 - Book of Abstracts 2023

Book of Abstracts | 2023
Use of monovalent copper ions
for disinfecting food from bacteria and extending shelf life
ChE-3-2
By: Hila Solomon hilasolo101@gmail com Advisors: Dr Dr Magal Saphier Saphier Dr Dr Oshra Illan Saphier Saphier Shamoon College of Engineering Beer-Sheva
Food has a a a a a a a a a a a a short shelf life
especially fresh produce in which a a a a a a a a a a a a decay process occurs due to the presence of of microorganisms It was was found that monovalent monovalent copper copper ions
ions
are are antimicrobial In this project a a a a a a a a a a a a a a a a a a a a a a solution solution comprised of of monovalent monovalent copper copper ions
ions
was was was prepared to disinfect disinfect bacteria and fungi on on on on on food surfaces It was was found that this solution solution has a a a a a a a a a a a a a a a a a a high disinfectant property at at at at a a a a a a a a a a a a a a a a a a temperature of of of 40˚C and it is is is is effective effective for for for 2 hours of of of exposure to to room atmosphere As for for for extending the the shelf shelf life
life
this solution was was found to to be effective effective for for for some of of of the the produce tested Keywords: disinfection food food food food waste microorganisms monovalent copper ions
shelf shelf life
life
Enhancement of PEDOT:PSS polymer as a a a a a a a a cathode in tantalum capacitors
ChE-3-3
By: Alexander Kotoshov alexy89898@gmail com 12 Advisors: Prof Ariela Burg Dr Eynav Kats
1Shamoon College of of Engineering Beer-Sheva
2“Vichay” Factory Dimona
A cathode of of a a a a a capacitor is made of of the polymer PEDOT:PSS (Poly(3 4-EthyleneDioxyThiophene) However in in high humidity environments this this polymer degrades affecting the capacitor's electrical parameters To address this this issue cross-linked reagents like DCHDC (Diglycidyl 1 2-yclohexanedicarboxylate) PEGDE (Poly(ethylene glycol) diglycidyl diglycidyl ether) ether) NPGDE (Neopentyl glycol glycol diglycidyl diglycidyl ether) ether) and ECHMECHC (3 4 4 EpoxyCycloHexylMethyl 3
3
4 4 EpoxyCycloHexaneCarboxylate) are used to to prevent changes in in in the capacitor's final parameters This study found that adding 2%wt of ECHMECHC improves humidity resistance and and enhances fabrication yield compared to the standard process Keywords: capacitors
cross-link electrical parameters ECHMECHC PEDOT:PSS 107