Understanding the role of plasticisers in spray-dried starch

被引:24
|
作者
Niazi, Muhammad Bilal Khan [3 ]
Zijlstra, Mark [1 ,2 ]
Broekhuis, Antonius A. [1 ]
机构
[1] Univ Groningen, Inst Technol & Management, Dept Chem Engn, NL-9747 AG Groningen, Netherlands
[2] Champ Technol Europe BV, NL-7491 AE Delden, Netherlands
[3] Natl Univ Sci & Technol, SCME, Islamabad, Pakistan
关键词
Amorphous; Retrogradation; Plasticiser; Spray drying; Thermoplastic starch; WAXY MAIZE STARCH; THERMOPLASTIC STARCH; POTATO STARCH; MECHANICAL-PROPERTIES; BARRIER PROPERTIES; OXIDIZED STARCH; CASSAVA STARCH; AMIDE GROUPS; FILMS; GLYCEROL;
D O I
10.1016/j.carbpol.2013.04.074
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Amorphous thermoplastic starch (TPS) films were produced by compression moulding of solution spray-dried TPS powder and by direct solution casting. Oxidised potato starch was used as a feedstock for production of plasticised formulations containing glycerol or urea, or their combinations with maltodextrin (DE = 19.1) as processing aid. The crystallinity index of freshly moulded films made from solution spray-dried powder was significantly lower than that for casted films. FTIR analysis showed that starch interacted in hydrogen bond formation with glycerol and urea plasticisers, reducing the glass transition temperature to 136 degrees C and 106 degrees C, respectively. Formulations containing maltodextrin did not show a T-g. Glycerol-plasticised and co-plasticised films immediately started to retrogradate in the presence of moisture, while urea based systems only showed slow recrystallization at the highest moisture exposure. In line with retrogradation behaviour, urea plasticised and co-plasticised films exhibited a more ductile behaviour, whereas glycerol based ones showed more brittle behaviour. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:571 / 580
页数:10
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