Ageing of Starch Based Systems as observed with FT-IR and Solid State NMR Spectroscopy

A.L.M. Smits; F.C. Ruhnau; J.F.G. Vliegenthart; J.J.G. van Soest

doi:10.1002/(sici)1521-379x(199812)50:11/12<478::aid-star478>3.0.co;2-p

Ageing of Starch Based Systems as observed with FT-IR and Solid State NMR Spectroscopy

A.L.M. Smits, F.C. Ruhnau, J.F.G. Vliegenthart, J.J.G. van Soest

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

The retrogradation and physical ageing of model starch systems with respect to their glass transition temperatures Tg have been investigated by Fourier transform infrared spectroscopy and solid state NMR spectroscopy. Diffuse reflectance Fourier transform infrared (DRIFT) spectra demonstrate the commencing retrogradation of starch materials stored above their Tg by changes in peak lineshapes and intensities in the characteristic area between 995 cm-1 and 1020cm-1. Solid state NMR proton relaxation times in the rotating frame (proton T1p) show a characteristic course in relation to the storage conditions (time, humidity), for which a distinction is made between physical ageing which occurs below the Tg, and recrystallisation (retrogradation) which takes place above Tg. The proton T1p's of materials stored below Tg increase asymptotically in time due to physical ageing, whereas the proton T1p's of materials stored above Tg increase until a moisture content is reached that rises them above Tg, decrease due to further water absorption and then increase due to recrystallisation (retrogradation).

Original language	English
Pages (from-to)	478-483
Journal	Starch-Stärke
Volume	50
Issue number	11-12
DOIs	https://doi.org/10.1002/(sici)1521-379x(199812)50:11/12<478::aid-star478>3.0.co;2-p
Publication status	Published - 1998

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10.1002/(sici)1521-379x(199812)50:11/12<478::aid-star478>3.0.co;2-p

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title = "Ageing of Starch Based Systems as observed with FT-IR and Solid State NMR Spectroscopy",

abstract = "The retrogradation and physical ageing of model starch systems with respect to their glass transition temperatures Tg have been investigated by Fourier transform infrared spectroscopy and solid state NMR spectroscopy. Diffuse reflectance Fourier transform infrared (DRIFT) spectra demonstrate the commencing retrogradation of starch materials stored above their Tg by changes in peak lineshapes and intensities in the characteristic area between 995 cm-1 and 1020cm-1. Solid state NMR proton relaxation times in the rotating frame (proton T1p) show a characteristic course in relation to the storage conditions (time, humidity), for which a distinction is made between physical ageing which occurs below the Tg, and recrystallisation (retrogradation) which takes place above Tg. The proton T1p's of materials stored below Tg increase asymptotically in time due to physical ageing, whereas the proton T1p's of materials stored above Tg increase until a moisture content is reached that rises them above Tg, decrease due to further water absorption and then increase due to recrystallisation (retrogradation).",

author = "A.L.M. Smits and F.C. Ruhnau and J.F.G. Vliegenthart and {van Soest}, J.J.G.",

year = "1998",

doi = "10.1002/(sici)1521-379x(199812)50:11/12<478::aid-star478>3.0.co;2-p",

language = "English",

volume = "50",

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TY - JOUR

T1 - Ageing of Starch Based Systems as observed with FT-IR and Solid State NMR Spectroscopy

AU - Smits, A.L.M.

AU - Ruhnau, F.C.

AU - Vliegenthart, J.F.G.

AU - van Soest, J.J.G.

PY - 1998

Y1 - 1998

N2 - The retrogradation and physical ageing of model starch systems with respect to their glass transition temperatures Tg have been investigated by Fourier transform infrared spectroscopy and solid state NMR spectroscopy. Diffuse reflectance Fourier transform infrared (DRIFT) spectra demonstrate the commencing retrogradation of starch materials stored above their Tg by changes in peak lineshapes and intensities in the characteristic area between 995 cm-1 and 1020cm-1. Solid state NMR proton relaxation times in the rotating frame (proton T1p) show a characteristic course in relation to the storage conditions (time, humidity), for which a distinction is made between physical ageing which occurs below the Tg, and recrystallisation (retrogradation) which takes place above Tg. The proton T1p's of materials stored below Tg increase asymptotically in time due to physical ageing, whereas the proton T1p's of materials stored above Tg increase until a moisture content is reached that rises them above Tg, decrease due to further water absorption and then increase due to recrystallisation (retrogradation).

AB - The retrogradation and physical ageing of model starch systems with respect to their glass transition temperatures Tg have been investigated by Fourier transform infrared spectroscopy and solid state NMR spectroscopy. Diffuse reflectance Fourier transform infrared (DRIFT) spectra demonstrate the commencing retrogradation of starch materials stored above their Tg by changes in peak lineshapes and intensities in the characteristic area between 995 cm-1 and 1020cm-1. Solid state NMR proton relaxation times in the rotating frame (proton T1p) show a characteristic course in relation to the storage conditions (time, humidity), for which a distinction is made between physical ageing which occurs below the Tg, and recrystallisation (retrogradation) which takes place above Tg. The proton T1p's of materials stored below Tg increase asymptotically in time due to physical ageing, whereas the proton T1p's of materials stored above Tg increase until a moisture content is reached that rises them above Tg, decrease due to further water absorption and then increase due to recrystallisation (retrogradation).

U2 - 10.1002/(sici)1521-379x(199812)50:11/12<478::aid-star478>3.0.co;2-p

DO - 10.1002/(sici)1521-379x(199812)50:11/12<478::aid-star478>3.0.co;2-p

M3 - Article

VL - 50

SP - 478

EP - 483

JO - Starch-Stärke

JF - Starch-Stärke

SN - 0038-9056

IS - 11-12

ER -

Ageing of Starch Based Systems as observed with FT-IR and Solid State NMR Spectroscopy

Abstract

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