title: Effect of solution plasma process with bubbling gas on physicochemical properties of chitosan.
abstract: In the present work, solution plasma process (SPP) with bubbling gas was used to prepare oligochitosan. The effect of SPP irradiation with bubbling gas on the degradation of chitosan was evaluated by the intrinsic viscosity reduction rate and the degradation kinetic. The formation of OH radical was studied. Changes of the physicochemical properties of chitosan were measured by scanning electron microscopy, X-ray diffraction, and thermogravimetric analysis, as well as ultraviolet-visible, Fourier-transform infrared, and13C nuclear magnetic resonance spectroscopy. The results indicated an obvious decrease in the intrinsic viscosity reduction rate after SPP irradiation with bubbling gas, and that the rate with bubbling was higher than that without. The main chemical structure of chitosan remained intact after irradiation, but changes in the morphology, crystallinity, and thermal stability of oligochitosan were observed. In particular, the crystallinity and thermal stability tended to decrease. The present study indicated that SPP can be effectively used for the degradation of chitosan.
authors.affiliation: College of Food Science, Shenyang Agricultural University, Shenyang 110866, China. Electronic address: mfm88492800@163.com.
authors.forename: Fengming
authors.initials: F
authors.lastname: Ma
authors.affiliation: College of Art Design and Architecture, Liaoning University of Technology, Jinzhou 121001, China. Electronic address: bitty98@163.com.
authors.forename: Pu
authors.initials: P
authors.lastname: Li
authors.affiliation: College of Food Science, Shenyang Agricultural University, Shenyang 110866, China. Electronic address: zbqfood@126.com.
authors.forename: Baiqing
authors.initials: B
authors.lastname: Zhang
authors.affiliation: School of Forestry, Northeast Forestry University, Harbin 150040, China. Electronic address: zhaosinacom@163.com.
authors.forename: Xin
authors.initials: X
authors.lastname: Zhao
authors.affiliation: School of Forestry, Northeast Forestry University, Harbin 150040, China. Electronic address: hgkfq@126.com.
authors.forename: Qun
authors.initials: Q
authors.lastname: Fu
authors.affiliation: School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150090, China. Electronic address: wzy219001@163.com.
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Shenyang Institute of Engineering, China. Electronic address: gucl@sie.edu.cn.
authors.forename: Cailian
authors.initials: C
authors.lastname: Gu
mesh_terms: D000388:Air; D055598:Chemical Phenomena; D048271:Chitosan / Q000737:chemistry*; D017665:Hydroxyl Radical / Q000737:chemistry; D058626:Plasma Gases / Q000737:chemistry*; D012995:Solubility; D012996:Solutions
chemical_list: D058626:Plasma Gases; D012996:Solutions; D017665:Hydroxyl Radical; D048271:Chitosan
keywords: Chitosan; Degradation; Plasma; Pulsed discharge