MilliporeSigma

Enzymatic acylation of starch.

Bioresource technology (2011-12-06)
Apostolos Alissandratos, Peter J Halling
ABSTRACT

Starch a cheap, abundant and renewable natural material has been chemically modified for many years. The popular modification acylation has been used to adjust rheological properties as well as deliver polymers with internal plasticizers and other potential uses. However the harsh reaction conditions required to produce these esters may limit their use, especially in sensitive applications (foods, pharmaceuticals, etc.). The use of enzymes to catalyse acylation may provide a suitable alternative due to high selectivities and mild reaction conditions. Traditional hydrolase-catalysed synthesis in non-aqueous apolar media is hard due to lack of polysaccharide solubility. However, acylated starch derivatives have recently been successfully produced in other non-conventional systems: (a) surfactant-solubilised subtilisin and suspended amylose in organic media; (b) starch nanoparticles dispersed in organic medium with immobilised lipase; (c) aqueous starch gels with lipase and dispersed fatty acids. We attempt a systematic review that draws parallels between the seemingly unrelated approaches described.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Starch, puriss. p.a., from potato, reag. ISO, reag. Ph. Eur., soluble
Sigma-Aldrich
Starch from potato, Powder
Sigma-Aldrich
Starch from corn, practical grade
Sigma-Aldrich
Starch from corn, Unmodified waxy corn starch of essentially pure amylopectin; contains only trace amounts of amylose.
Sigma-Aldrich
Starch from potato, suitable for electrophoresis
Sigma-Aldrich
Starch from wheat, Unmodified
Sigma-Aldrich
Starch from rice
Sigma-Aldrich
Starch from potato, Soluble
Sigma-Aldrich
Starch, from potato, tested according to Ph. Eur.
Supelco
Starch from corn, for use with Total Dietary Fiber Control Kit, TDF-C10
Supelco
Starch from corn, analytical standard, analytical standard for Starch Assay Kits SA-20 and STA-20
Sigma-Aldrich
Starch from corn