論文

2018年11月1日

Carboxymethylation of Plasticized Starch by Reactive Extrusion (REX) with High Reaction Efficiency

Starch/Staerke
  • Romain Milotskyi
  • ,
  • Christophe Bliard

70
DOI
10.1002/star.201700275

© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Carboxymethyl potato starches with degrees of substitution (DS) of 0.15–0.64 are synthesized in one step and in high levels of reaction efficiency (RE) using reactive extrusion processes on plasticized starch. The influence of process parameters such as screw geometry, specific mechanical energy (SME), temperature, and residence time on DS, RE and crystallinity are determined. SME have a surprisingly greater influence than the reaction time on RE. Up to 64% RE is reached with high values of SME (297 kJ kg−1). SME also have a major impact on starch chain degradation. The co-rotating screw geometry have a positive influence on the RE. The temperature is found to have no effect on the reaction in the 90–120 °C range. Two types of malto-dextrins are successfully used as alternative plasticizers for starch. The carboxymethylated starches are characterized using nuclear magnetic resonance spectroscopy, size exclusion chromatography, and X-ray diffraction. This study shows that starch can be efficiently carboxymethylated in a plasticized medium with high RE using different plasticizers in very short reaction times.

リンク情報
DOI
https://doi.org/10.1002/star.201700275
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85044208819&origin=inward
ID情報
  • DOI : 10.1002/star.201700275
  • ISSN : 0038-9056
  • SCOPUS ID : 85044208819

エクスポート
BibTeX RIS