期刊
CARBOHYDRATE POLYMERS
卷 92, 期 1, 页码 260-268出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.09.016
关键词
Silver nanoparticles; Amylose inclusion complex; Starch; Sodium palmitate; Jet-cooking
资金
- U.S. Department of Energy [DE-FG02-07ER46453, DE-FG02-07ER46471]
Starch-stabilized silver nanoparticles (AgNP) were prepared from amylose-sodium palmitate helical inclusion complexes by first converting sodium palmitate within the amylose helix to silver palmitate by an ion-exchange reaction with silver nitrate, and then reducing the complexed silver palmitate salt with NaBH4. This process yielded stable aqueous solutions that could be dried and then re-dispersed in water for end-use applications. Reaction products were characterized by inductively coupled plasma-atomic emission spectroscopy (ICP-AES), UV-VIS spectroscopy, X-ray diffraction, TEM. SEM and light microscopy. Addition of acid to reduce the pH of aqueous starch-AgNP solutions produced an increase in viscosity, and nearly quantitative precipitation of starch-AgNP was observed at low pH. Smaller AgNP and higher conversions of silver nitrate to water-soluble starch-AgNP were obtained in this process, as compared with a process carried out under similar conditions using a commercial soluble starch as a stabilizer. Published by Elsevier Ltd.
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