Functionalized nano-starch prepared by surface-initiated atom transfer radical polymerization and quaternization

Qiong Su; Yanbin Wang; Xiangfei Zhao; Hongling Wang; Zhichao Wang; Nianen Wang; Hong Zhang

doi:10.1016/j.carbpol.2019.115390

Functionalized nano-starch prepared by surface-initiated atom transfer radical polymerization and quaternization

Carbohydr Polym. 2020 Feb 1:229:115390. doi: 10.1016/j.carbpol.2019.115390. Epub 2019 Nov 14.

Authors

Qiong Su¹, Yanbin Wang², Xiangfei Zhao³, Hongling Wang¹, Zhichao Wang¹, Nianen Wang⁴, Hong Zhang¹

Affiliations

¹ Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in Universities of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, PR China.
² Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in Universities of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, PR China. Electronic address: ybwang@126.com.
³ Key Laboratory for Utility of Environment-Friendly Composite Materials and Biomass in Universities of Gansu Province, College of Chemical Engineering, Northwest Minzu University, Lanzhou, 730030, PR China. Electronic address: 412544696@qq.com.
⁴ Taohuashan TV Station of Culture, Sports, Film and Television Bureau of Huining County of Gansu, BaiYin, 730700, PR China.

PMID: 31826456
DOI: 10.1016/j.carbpol.2019.115390

Abstract

Functionalized nano-starch particles, designed for the adsorption of heavy metals in wastewater, were prepared by a nano-processing, a halogenated grafting modification, a grafting copolymerization of surface-initiated atom transfer radical polymerization (SI-ATRP) and a quaternized modification of native corn starch. The influence of the synthesis process variables, such as the hydrolysis time, the concentration of monomer, the molar ratio of copper bromide (CuBr) to 2, 2'-bipyridine (bpy) and the graft copolymerization temperature on the properties of the products were studied. The morphology, molecular structure, crystalline structure of the functionalized nano-starch and its derivatives were characterized by Fourier transform-infrared spectroscopy (FT-IR), ¹H nuclear magnetic resonance (¹H-NMR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscope (TEM). The functionalized nano-starch showed strong adsorption for chromate and could be used as an effective wastewater treatment agent. Its adsorption capability could be almost totally regenerated by an easy process.

Keywords: Graft copolymerization; Nano-starch; Quaternization; SI-ATRP; Wastewater treatment.