Infrared spectroscopy as a tool to characterise starch ordered structure-a joint FTIR-ATR, NMR, XRD and DSC study

被引：642
作者：
Warren, Frederick J. [1 ]
Gidley, Michael J. [1 ]
Flanagan, Bernadine M. [1 ]
机构：
[1] Univ Queensland, Ctr Nutr & Food Sci, ARC Ctr Excellence Plant Cell Walls, Queensland Alliance Agr & Food Innovat, Brisbane, Qld 4072, Australia
来源：
CARBOHYDRATE POLYMERS | 2016年 / 139卷
关键词：
Starch; Crystallinity; Polymer structure; FTIR-ATR; NMR; XRD; C-13 CP/MAS NMR; PHASE-TRANSITIONS; MOLECULAR ORDER; MAIZE STARCHES; POTATO STARCH; X-RAY; GELATINIZATION; CRYSTALLINE; AMYLOSE; GELATION;
D O I：
10.1016/j.carbpol.2015.11.066
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Starch has a heterogeneous, semi-crystalline granular structure and the degree of ordered structure can affect its behaviour in foods and bioplastics. A range of methodologies are employed to study starch structure; differential scanning calorimetry, C-13 nuclear magnetic resonance, X-ray diffraction and Fourier transform infrared spectroscopy (FUR). Despite the appeal of FTIR as a rapid, non-destructive methodology, there is currently no systematically defined quantitative relationship between FTIR spectral features and other starch structural measures. Here, we subject 61 starch samples to structural analysis, and systematically correlate FTIR spectra with other measures of starch structure. A hydration dependent peak position shift in the FTIR spectra of starch is observed, resulting from increased molecular order, but with complex, non-linear behaviour. We demonstrate that FTIR is a tool that can quantitatively probe short range interactions in starch structure. However, the assumptions of linear relationships between starch ordered structure and peak ratios are overly simplistic. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：35 / 42
页数：8
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