The effects of ultrasonic/microwave assisted treatment on the properties of soy protein isolate/microcrystalline wheat-bran cellulose film

• Published in: Journal of food engineering 2013-01, Vol.114 (2), p.183-191
• Main Authors: Wang, Zhe, Sun, Xiu-xiu, Lian, Zi-xuan, Wang, Xiao-xuan, Zhou, Jing, Ma, Zhong-su
• Format: Article
• Language: English
• Subjects: Animal, plant, fungal and microbial proteins, edible seaweeds and food yeasts; Biological and medical sciences; Cellulose; Edible; Edible film; edible films; Fillers; Food engineering; Food industries; Foods; Fundamental and applied biological sciences. Psychology; General aspects; hydrogen bonding; Hydrogen bonds; Microcrystalline wheat-bran cellulose; microwave treatment; Microwaves; Particle size; Proteins; Soy protein isolate; thermal properties; Ultrasonic/microwave assisted treatment; wheat bran
• ISSN: 0260-8774; 1873-5770
• DOI: 10.1016/j.jfoodeng.2012.08.004

► Wheat bran cellulose (WC) were prepared. ►Microcrystalline wheat bran cellulose (MWC) were prepared. ► Ultrasonic/microwave assisted treatment has been used to modify MWC to MMWC. ► WC, MWC, and MMWC content in the SPI films improved the properties of the films. ► The SPI/MMWC film showed the best properties. Wheat-bran cellulose (WC) and microcrystalline wheat-bran cellulose (MWC) were prepared, and edible films containing different ratios of soy protein isolate (SPI) with WC, MWC, and ultrasonic/microwave modified MWC (MMWC) were made by casting. The different proportions and particle size of the fillers (WC, MWC, and MMWC) affected the properties of each of the films. The SPI/MMWC film demonstrated the best properties: MMWC had a smaller particle size and more free hydroxyls on the surface, enabling the formation of stronger intra-molecular hydrogen bonds with SPI that yielded a blend film with a homogeneous, compact structure. The different thermal properties of the films were also mainly attributed to their structures. In addition, FT-IR showed the association between SPI and the fillers, while SEM showed that the surface morphology of the SPI/MMWC film was smoother and more homogeneous.