Speaker
Mr
Thananchai Piroonpan
(Department of Imaging and Printing Technology, Faculty of Science, Chulalongkorn University)
Description
A new purpose of silver nanoparticles (AgNPs) in chitosan (CS)
biopolymer is proposed as a radiation dosimeter for application in the
dose range of food irradiation. The biopolymer-AgNPs are simply
prepared from AgNO$_{3}$ precursor and CS (DD ${=} 90$%, $M_v = 580$ kDa)
aqueous solution. The optimum formula of biopolymer-AgNPs dosimeter
was studied.
A series of the prepared biopolymer-AgNPs dosimeter
relatively response by colour changing to the electron beam
irradiation doses.
With this system, the colours were measured in a CIELAB colour space
using a colourimeter. The biopolymer-AgNPs dosimeter is exposed to
various irradiation doses ranging from $0$ to $10$ kGy. Based on
CIELAB colour space, the colour of biopolymer-AgNPs dosimeter is
changed from white to yellow and dark brown by irradiation. The
numerically measured colour is presented in the CIELAB colour
difference ($\Delta$E$_{ab}$). The relationship of dose and colour
showed that $\Delta$E$_{ab}$ linearly increased with irradiation dose.
The colour change is due to the particle size of biopolymer-AgNPs
dosimeter. The colours from the developed biopolymer-AgNPs dosimeter
can be applied using general purpose scanner and the measured colours
were then calculated to their corresponding radiation doses. The
biopolymer-AgNPs dosimeter is expected to be a simple, economical,
effective and alternative device as the food irradiation dosimeter.
| Country/Organization invited to participate | Thailand |
|---|
Primary author
Mr
Thananchai Piroonpan
(Department of Imaging and Printing Technology, Faculty of Science, Chulalongkorn University)
Co-authors
Ms
Pichayada Katemake
(Department of Imaging and Printing Technology, Faculty of Science, Chulalongkorn University, Thailand)
Ms
Wanvimol PASANPHAN
(Kasetsart University, Thailand)
