title: Synthesis and evaluation of physicochemical properties of cross-linked sago starch.
abstract: Highly substituted sago starch phosphate was synthesized using POCl(3) as cross-linking reagent. Titrimetric and Fourier transform infra red (FT-IR) spectral analysis were used to characterize the substitution. Studying the different factors affecting the reaction parameters showed that the optimal conditions for starch phosphorylation were: 4h reaction time and reagent concentration 1.5% (w/w). The physicochemical properties of cross-linked sago starch (CLSS) were done using Scanning electron micrograph (SEM), X-ray powder diffractometer (XRD and Thermogravimetric analysis (TGA). The results revealed that crystalline nature of native sago starch was transformed after cross-linking. TGA report exhibited higher thermal stability, which makes it suitable for various industrial applications. Swelling behavior showed high swelling at low temperature (30 and 60°C) as compared to high temperature (90°C).
authors.affiliation: Department of Pharmaceutical sciences, Dibrugarh University, Assam, India. akhileshvikram@gmail.com
authors.forename: Akhilesh V
authors.initials: AV
authors.lastname: Singh
authors.forename: Lila K
authors.initials: LK
authors.lastname: Nath
mesh_terms: D002627:Chemistry, Physical / Q000379:methods; D003432:Cross-Linking Reagents / Q000737:chemistry* / Q000494:pharmacology; D032462:Cycadopsida; D006358:Hot Temperature; D046911:Macromolecular Substances / Q000737:chemistry; D008855:Microscopy, Electron, Scanning / Q000379:methods; D008956:Models, Chemical; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013213:Starch / Q000138:chemical synthesis* / Q000737:chemistry*; D013696:Temperature; D013818:Thermogravimetry / Q000379:methods; D013997:Time Factors; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D003432:Cross-Linking Reagents; D046911:Macromolecular Substances; D013213:Starch