Effect of lignin concentration on crystallinity of TPS/Lignin biocomposite
Syahidah1*, Muh Rezki Arif Pratama1, Astuti Arif1, Andi Sri Rahayu Diza Lestari1, Ira Taskirawati1, Makkarennu1, Sulaeha2, Evi Triwulandari3, Witta Kartika Restu3, Widya Fatriasari4, Sita Heris Anita5, Muhammad Ghozali3

Syahidah1*, Muh Rezki Arif Pratama1, Astuti Arif1, Andi Sri Rahayu Diza Lestari1, Ira Taskirawati1, Makkarennu1, Sulaeha2, Evi Triwulandari3, Witta Kartika Restu3, Widya Fatriasari4, Sita Heris Anita5, Muhammad Ghozali3

Abstract

Several alternatives have been considered to minimize the environmental impact caused by conventional polymers. One alternative that has been widely developed is the addition of lignin to the starch matrix. This study aims to determine the effect of lignin concentration on the crystallinity of palm starch biocomposite. Palm starch, glycerol, stearic acid, and lignin are extruded in a twin-screw extruder. Palm starch crystal characteristics were analyzed using XRD. The results of X-ray diffraction (XRD) show that palm starch has a crystal structure of type C. The percentage crystallinity of palm starch, TPS, and TPSL was 57.6%, 51.9%, 55.7%, 56.3%, 60.1%, 63.4%, and 66.4%, respectively. The addition of lignin to the starch matrix can increase along with the increase in lignin content.

Keywords: lignin, crystallinity, TPS, biocomposite, starch

Topic: Topik D: Climate change impacts for biodiversity