Sintesis dan Karakterisasi Superabsorben Polimer Berbasis Natrium Karboksimetil Selulosa dan Hidroksietil Metil Selulosa Menggunakan Agen Ikat Silang Asam Adipat

Abstract

This study examines the synthesis of polymer superabsorbent from sodium carboxymethyl cellulose (Na-CMC) and hydroxyethyl methyl cellulose (HEMC) with adipic acid crosslinking agent. The synthesis of polymer superabsorbent is done by mixing Na-CMC and HEMC in the ratio of 3:1 in a 2% solution, then the crosslinking agent will be added with variations of 1%, 3%, 5%, 7%, and 9%. The result of the mixture is a film that will be cut into small pieces and characterized by testing the degree of crosslinking, water absorption, FTIR, DSC, and TGA. The highest percentage of crosslinking degrees in the 5% SAP AA sample was 89.39%. The results of water absorption with the optimum value are in the 1% SAP AA sample of 13.183% or 131,83 g/g. The results of the FTIR test showed the formation of superabsorbent polymer in SAP AA 1% with the presence of -OH groups at wave number 3332.2 cm-1 and -COO groups at wave number 1416.4 cm-1. The thermogram results on thermal analysis using DSC produced a glass transition temperature (Tg) value of SAP between Tg Na-CMC and HEMC which is 117.15 oC where the glass transition temperature of Na-CMC is 124.93 oC. HEMC is 106.89 oC which indicates that the two samples have mixed. The TGA analysis for the Na- CMC sample left a residue of 34.8% of the initial mass and a mass loss of 69.3%, and for the SAP AA 1% sample left a residue of 37% of the initial mass and a mass loss of 70%.