期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 179, 期 -, 页码 154-160出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.03.004
关键词
Starch nanoparticles; Crystallinity; Mechanical properties
资金
- Major Special Projects on the Development of Cyperus esculentus Industry in Jilin Province [ZKJCKJT 2020485]
Starch nanoparticles were prepared by citrate esterification and ultrasound treatment, with the ultrasonic treatment time affecting the size and crystallinity of the particles. The addition of starch nanoparticles significantly improved the mechanical properties of chitosan composite films.
Starch nanoparticles were prepared by citrate esterification and ultrasound treatment. With the increase of ultrasonic treatment time, the mean size and PDI of the particles decreased gradually, when the ultrasonic treatment time was 5 min, the prepared starch nanoparticles had a mean size and PDI of 352.8 nm and 0.292, respectively. X-ray diffraction (XRD) showed that the starch nanoparticles prepared by ultrasonic treatment for 5 min had an A-type crystalline structure and a crystallinity of 41.42%. The chitosan composite films were reinforced by esterified starch with different ultrasound treatment times, the results indicated that the addition of starch nanoparticles resulted in a significant increase in the mechanical properties of films. This study indicates that esterification and ultrasound treatment can be used to prepare starch nanoparticles with a higher crystallinity and higher efficiency, which will further promote the application of nanocomposite films in packaging applications. ? 2021 Elsevier B.V. All rights reserved.
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