Effect of Ultrasonic and Microwave Dual-Treatment on the Physicochemical Properties of Chestnut Starch

• Main Authors: Meng Wang, Yanwen Wu, Yongguo Liu, Jie Ouyang
• Format: Article
• Language: English
• Published: MDPI AG 2020-07-01
• Series: Polymers
• Subjects: starch; ultrasound; microwave; dual treatment; long- and short-range molecular order
• Online Access: https://www.mdpi.com/2073-4360/12/8/1718

This work examined the effect of ultrasound and microwave treatments, separate and in combination, on the physicochemical and functional properties of chestnut starch. The results revealed that the ultrasonic-microwave (UM) and microwave-ultrasonic (MU) dually modified samples exhibited more severe surface damage, weaker birefringence, and lower relative crystallinity and gelatinization enthalpy than the native and single-treated starches. The UM samples showed the highest oil absorption capacity, and the MU samples showed the highest water absorption capacity and the best freeze-thaw stability (five cycles) among all samples. The swelling power, peak, trough, final, and breakdown viscosities, and pasting temperature all decreased regardless of single or dual modification. This study provides a reference for potential industrial applications of ultrasound and microwave treatments for the modification of chestnut starch.