Title

Rheological of chocolate-flavored, reduced-calories coating as a function of conching process

Author

GUADALUPE SANCHEZ OLIVARES

Access level

Open Access

Summary or description

Continuous flow and linear viscoelasticity rheology of chocolate coating is studied in this work using fat substitute gums (xanthan, GX). An alternative conching process, using a Rotor-Estator (RE) type impeller, is proposed. The objective is to obtain a chocolate coating material with improved flow properties. Characterization of the final material through particle size distribution (PSD), differential scanning calorimetry (DSC) and proximal analysis is reported. Particle size distribution of the final material showed less polydispersity and therefore, greater homogeneity; fusion points were also generated at around 20 °C assuming crystal type I (β’2) and II (α). Moreover, the final material exhibited crossover points (higher structure material), whereas the commercial brand chocolate used for comparison did not. The best conditions to produce the coating were maturing of 36 h and 35 °C, showing crossover points around 76 Pa and a 0.505 solids particle dispersion (average particle diameter of 0.364 μm), and a fusion point at 20.04 °C with a ΔHf of 1.40 (J/g). The results indicate that xanthan gumis a good substitute for cocoa cutter and provides stability to the final product.

Publish date

2014

Publication type

Article

Publication version

Published Version

Format

application/pdf

Language

English

Audience

Companies

Students

Researchers

Teachers

Source repository

Repositorio Institucional CIATEC

Downloads

79

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