Paper Title
Modifying the Characteristic of Cassava Starch as Wood Bio-Adhesive using Sodium Lauryl Sulfate

Abstract
The development of bio-adhesive properties in the wood industry is an exciting subject to be studied. This research aimed to modify and improve the quality of cassava starch-based wood bio-adhesive using sodium lauryl sulfate (SLS). The capability of SLS to prevent retrogradation in the gelatinization process opens an opportunity to get a better quality of cassava starch-based wood bio-adhesive. This adhesive was made by three steps of the process: hydrolysis, oxidation, and gelatinization. The reaction was run in a batch reactor at 70 °C and 1 atm for 90 minutes. The compositions of SLS were varied to 0%, 0.5%, 1%, 1.5%, and 2% of the weight of cassava starch. The viscosity, solid content, shelf-life, dry shear strength, wet shear strength, and FTIR analysis were carried out to know the adhesive characteristic. The result showed that the additions of SLS could decreased the viscosity and increased the solid content of adhesive. SLS also improved the wet and dry shear strength of adhesive. The best dry and wet shear strength was obtained by SA2 adhesive with 0.6764 MPa and 0.3541 MPa. The FTIR analysis indicated that cassava starch experienced hydrolysis and oxidation during the reaction process. Therefore, SLS addition has significant impact on the improvement of the quality of cassava starch-based wood bio-adhesive. Keywords - Bio-adhesive, Cassava Starch, Sodium Lauryl Sulfate