Details

Autor(en) / Beteiligte

• Morán, J. I.
• Cyras, V. P.
• Vázquez, A.

Titel

Preparation and Characterization of Three Different Derivatized Potato Starches

Ist Teil von

• Journal of polymers and the environment, 2013-06, Vol.21 (2), p.395-404

Ort / Verlag

Boston: Springer US

Erscheinungsjahr

2013

Link zum Volltext

Quelle

SpringerNature Journals

Beschreibungen/Notizen

• The use of native starch as a thermoplastic polymer is limited by its fragility and high water absorption. Due to the presence of several hydroxyl groups in its structure, water acts as a natural plasticizer of starch, modifying its properties. It is necessary to chemically modify starch molecules by replacing hydroxyl groups with other functional groups to reduce water absorption. Chemical modification of starch granules also alters its swelling and gelatinization behavior. In this contribution we describe the chemical modification of starch and its influence on its hydrophilicity and heat resistance. Acetic acid, maleic anhydride and octanoyl chloride were used as derivatizing reagents. The effectiveness of the treatments was evaluated by means of infrared spectroscopy. Different tests were conducted in order to evaluate the influence of the different chemical modifications on starch structure and properties. Results showed that the treatments effectively reduced starch moisture susceptibility, while substantially altering other properties such as amylose content, swelling power, solubility, and heat resistance. Finally, films were prepared from native and derivatized starch and their surface polarity was evaluated.