Homogenization-induced degradation of hydrophobically modified starch determined by asymmetrical flow field-flow fractionation and multi-angle light scattering

被引:71
作者
Modig, Gustaf
Nilsson, Lars
Bergenstahl, Bjorn
Wahlund, Karl-Gustav
机构
[1] Lund Univ, Fac Engn LTH, Div Food Technol, Ctr Chem & Chem Engn, S-22100 Lund, Sweden
[2] Lund Univ, Fac Engn LTH, Div Tech Analyt Chem, Ctr Chem & Chem Engn, S-22100 Lund, Sweden
关键词
high pressure; homogenization; hydrophobically modified starch; molar mass; field-flow fractionation; multi-angle light scattering;
D O I
10.1016/j.foodhyd.2005.12.011
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
High-pressure homogenization of modified starches is a type of treatment used within the food and pharmaceutical industry for the production of emulsions. Such intense mechanical treatment may, however, influence the size and size distribution of the starch polymer, which may affect the properties of the emulsions. In this work, asymmetrical flow field-flow fractionation (AsFIFFF) connected on-line to a multi-angle light scattering detector (MALS) was used to study the influence of high-pressure homogenization upon molar mass and root-mean-square (r.m.s.) radius of three different octenyl succinate anhydride (OSA) starch samples originating from potato. The homogenization at constant pressure resulted in a significant decrease of both molar mass and r.m.s. radius. The magnitude of the change in molar mass and r.m.s. radius could be correlated to the initial size of the OSA starch and the energy dissipation rate of the homogenization treatment. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1087 / 1095
页数:9
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