2.2.6 Thermogravimetric and SEM Study
TGA analysis of sericin powder was carried out on
TGA-7 (PerkinElmer, US). The thermograms were
obtained under nitrogen atmosphere at a uniform heating
rate of 100C/ min in the temperature range 50 - 900°C.
Surface morphology of the sericin powder was
observed under the scanning electron microscope EVO50
(Zeiss, Germany) at a magnification of 5 KX. Surface of
specimen was coated with gold before analysis.