SINTESIS DAN KARAKTERISASI POLIELEKTROLIT KOMPLEKS (PEC) KITOSANPEKTIN SEBAGAI MATRIKS FILM INDIKATOR pH

Abstract

Polyelectrolyte complex (PEC) was formed by the ionic interaction between the polyanion of pectin and polycation ofchitosan. The electrostatic attraction between the amino group bonding (-NH3+) of protonated chitosan and carboxyl acidbond (-COO-) deprotonated from pectin is the main interaction of the formation of PEC chitosan-pectin. The purpose ofthis research is to synthesize and characterize PEC chitosan-pectin for application as a pH indicator. The comparison ofsolution chitosan 3% to pectin 3% (b/v) are 0, 10, 30, 50, 70, 90 and 100% at pH 4. The process of synthesis PEC filmhas used the ultrasonic method. The product of polyelectrolyte complex chitosan-pectin can be synthesized by indirectmethods at pH 4. The difference in the characteristics of the PEC chitosan-pectin of various polymer composition andprovenance are indicated with the analysis of functional group analysis, thermal analysis, swelling and color analysis.