THE SYNTHESIS AND CHARACTERIZATION OF AMINATED POLYETHER SULFONE AS SOLID SUPPORT MATERIAL FOR LIPASE IMMOBILIZATION (original) (raw)

Enzymes are potential catalysts in biodiesel manufacturing because of their good properties (good performance in regioselectivity, stereoselectivity, biodegradable, etc.). However, it has many limitations such as zero reusability indication, unstable toward high temperature, organic solutions, acids, bases, and mechanical influences. One of the ways to handle these problems is to immobilize enzymes onto the suitable solid supports. Polyether sulfone (PES) has good resistant properties towards chemicals, thermals, and mechanics. PES interaction with the enzyme such as lipase could be occured by hydrophilic interaction. PES modification is one of the ways to form covalent bonds with the enzyme in order to prevent the leaching out of lipase from the solid support. Aminated PES was synthesized through three main parts; which are the synthesis of PES, the nitration of PES, and the reduction of PES-NO2. The synthesized PES-NH2 is brown powder having the infrared characteristic peaks at wave numbers of 1320.1, 1187.1, 1236.5, and double bands at 3077.4 cm -1 . Based on the NMR spectrums analysis, PES-NH2 was successfully formed from the synthesized PES produced by the Dean Stark trap and Microwave Assisted Organic Synthesis (MAOS) methods. Aminated PES is applicable as solid support of lipase to carry out transesterification reaction of triglyceride to improve biodiesel production.