Microstructure of starch puffing through microwave heating process

Mohd Salleh, Faiqa Shazeaa (2020). Microstructure of starch puffing through microwave heating process. University of Birmingham. Ph.D.

[img] MohdSalleh2020PhD.pdf
Text - Accepted Version
Restricted to Repository staff only until 5 December 2030.
Available under License All rights reserved.

Download (11MB) | Request a copy


Microwave heating has gained popularity as an alternative rapid drying method that can be used for the expansion of food products. In this study, the effects of processing conditions and pre-treatment of starch on achieving controlled puffing were investigated. The influence of sample sizes and shapes were examined. Microstructure and physical characteristics of the expanded starch products were then determined. The 3D microstructure was analysed using the X-ray microCT-scanning technique. Upon heating moisture within the sample, it generates superheated steam resulting in a fast release of the steam and puffing of the sample. In this study, the structural parameters - focusing on volume, porosity, number of pores, structure thickness and structural separation of expansion were observed and compared between samples in order to correlate to the optimum conditions for obtaining a highly puffed product with uniform distribution of air cells throughout the inner structure of the sample. Results showed that maximum size expansion was achieved with high gelatinised pellets and geometry shaped edges in single-mode microwave than the domestic microwave.

Type of Work: Thesis (Doctorates > Ph.D.)
Award Type: Doctorates > Ph.D.
Licence: All rights reserved
College/Faculty: Colleges (2008 onwards) > College of Engineering & Physical Sciences
School or Department: School of Chemical Engineering
Funders: Other
Other Funders: Kementerian Pendidikan Malaysia, PepsiCO
Subjects: Q Science > Q Science (General)
T Technology > T Technology (General)
URI: http://etheses.bham.ac.uk/id/eprint/10184


Request a Correction Request a Correction
View Item View Item


Downloads per month over past year