Pembuatan Natrium Karboksimetil Selulosa (Na-CMC) dari Selulosa Kulit Buah Pinang (Areca Catechu L.) pada Variasi Konsentrasi Naoh

Abstract

Areca nut shells fro111 a gricultural waste can be used to produce cellulose, which is then converted into sodiu,n carboxynzeth yl cellulose ( Na-CMC ). Cellulose was isolated 11sin g a con1bi11atio11of tw o ,nethods, 11a111ely dil 11te acid trea1111ent with HNO1 and alkalination with NaOH solution, yielding a -cellulose of 12.534 g (16.713% of the initial weight). The etheriftcatio11reaction with the initial stage of alkalisation, na111el y the rea ction between cell11lo s e and NaOH in a ,nixed reaction 111ediu111 of 100ml isopropanol-butanol (20:80) ( vl v), with variations of NaOH 10%, 15%, 20%, and 25%, was used to prepa re Na -CMC, .followed by the ca rbox y111eth yla tion stage with the addition of sodi11111 chloroacetate to alkaline cellulose. Na-CMC was obtained at 76.5%, 78.2%, 80.1%, and 79% of the starting weight, respectively. /11 th e 20 % NaOH variation, the highest degree of substitution was 0.61. According to the results of FTIR spec1ro pho 101net e r te st in g, Na-CMC has a vibrational peak in the wave n11111ber region of 3250.2 cnr 1, which is the absorption band of the -OH group, the C-H stretching group at wave 11u1nber 2887 .5 c1n·1, a typical peak at wave 1111,nber 1580.4 cn(1, which shows the coo· stretching group, and 1408.9 cn z"1 C - H bending group Oil carboxy,nethyl. SEM surfa ce ,norphology analysis revealed that the surface of the fibres 011 so dium carboxy111eth y l cellulose appeared larger and expanded than the surface of a-cellulose.