title: Effect of drying conditions on crystallinity of amylose nanoparticles prepared by nanoprecipitation.
abstract: In this study, amylose nanoparticles prepared by nanoprecipitation were dried at different conditions. The crystalline structure, crystallinity, re-dispersibility and morphological characteristic of the amylose nanoparticles after drying were investigated. X-ray diffraction analysis revealed that the V-type crystalline structure of the amylose nanoparticles formed in the drying process instead of the precipitation process, and drying condition significantly affects the crystallinity. The temperature cycles drying at 4°C and 40°C considerably increased crystallinity of the amylose nanoparticles, 24h (4/40°C, 12h/12h) drying under 11% relative humidity could give rise to a crystallinity up to 50.05%. The applied drying procedures had no obvious effect on the appearance of the amylose nanoparticles. The Z average-size (d. nm) and polydispersity index (PDI) obtained from dynamic light scattering analysis suggested that the drying processes caused some aggregates, but the dried amylose nanoparticles could be well dispersed in water.
authors.affiliation: Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China.
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Yan
authors.affiliation: Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China.
authors.forename: Yanjiao
authors.initials: Y
authors.lastname: Chang
authors.affiliation: Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China.
authors.forename: Youjia
authors.initials: Y
authors.lastname: Fu
authors.affiliation: Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China. Electronic address: jiang.zhou@jlu.edu.cn.
authors.forename: Jiang
authors.initials: J
authors.lastname: Zhou
mesh_terms: D000688:Amylose / Q000737:chemistry* / Q000302:isolation & purification*; D011232:Chemical Precipitation; D003890:Desiccation / Q000379:methods*; D006813:Humidity; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D013696:Temperature
chemical_list: D000688:Amylose
keywords: Amylose nanoparticles; Crystallinity; Drying condition; Nanoprecipitation