title: Effects of hydrothermal pretreatment on subsequent octenylsuccinic anhydride (OSA) modification of cornstarch.
abstract: Cornstarch granules were hydrothermally pretreated and then esterified with octenylsuccinic anhydride (OSA). The physicochemical properties of cornstarch and hydrothermally pretreated OS-starch (H-OS-starch) were investigated. Results showed that hydrothermal pretreatments significantly increased the degree of substitution (DS) and reaction efficiency (RE) of H-OS-starch compared with the control. The higher the pretreatment temperature was, the more the OSA could go deep into the internal starch granules. The optimal pretreatment temperature for the OSA modification was 60°C. In addition, the OS groups appeared to be distributed throughout the OS-starch granules, especially on the surface, as shown by confocal laser scanning microscopy (CLSM). H-OS-starch had a slightly higher peak viscosity (Pv) and break down (BD) values, but lower pasting temperature (Tp) compared with the control OS-starch.
authors.affiliation: College of Food Science, South China University of Technology, 381 Wushan Road, Guangzhou 510640, PR China.
authors.forename: Xu
authors.initials: X
authors.lastname: Chen
authors.forename: Xiaowei
authors.initials: X
authors.lastname: He
authors.forename: Qiang
authors.initials: Q
authors.lastname: Huang
mesh_terms: D055598:Chemical Phenomena; D013213:Starch / Q000737:chemistry*; D013387:Succinic Anhydrides / Q000737:chemistry*; D013696:Temperature
chemical_list: D013387:Succinic Anhydrides; D013213:Starch
keywords: ANN; BD; BU; Brabender units; CLSM; Cv; DS; DSC; H-OS-starch; HMT; Hydrothermal treatment; LSD; MB(+); Methylene Blue; NMS; OS group distribution; OS-starch; OSA; PMT; Pv; RE; SB; SP; Swelled cornstarch; Tp; X-ray diffraction.; XRD; annealing; breakdown; cold paste viscosity; confocal laser scanning microscopy; degree of substitution; differential scanning calorimetry; heat-moisture treatment; hydrothermal pretreated OS-starch; least significant difference; normal maize starch; octenylsuccinic anhydride; pasting temperature; peak viscosity; photomultiplier; reaction efficiency; setback; swelling power