期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 67, 期 10, 页码 2916-2925出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.8b06479
关键词
debranched starch; short-chain amylose; boron ester bonds; nanocomposite
资金
- National Key R&D Program of China [2018YFD0400701]
- National Natural Science Foundation, China [31671814]
- Major Agricultural Application Technology Innovation Project of Shandong Province
- Special Funds for Taishan Scholars Project of Shandong Province [ts201712058]
Recently, starch nanoparticles have attracted widespread attention from various fields. In this study, a new strategy for preparing covalent-cross-linked starch nanoparticles was developed using boron ester bonds formed between debranched starch (DBS) and borax. The nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), X-ray diffraction (XRD), dynamic light scattering (DLS), differential scanning calorimeter (DSC), and thermogravimetric analysis (TGA). The obtained nanoparticles were spherical with a size of 100-200 nm. The formation of boron ester bonds was confirmed by FTIR. The as-prepared starch nanoparticle exhibited a low relative crystallinity of 13.6%-23.5%. Compared with pure starch film, the tensile strength of starch film with 10% starch nanoparticles increased about 45%, and the elongation at break percentage of starch film with 5% starch nanoparticles increased about 20%. The new strategy of forming starch nanoparticles by using boron ester bonds will advance the research of carbohydrate nanoparticles.
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