College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
College of Art Design and Architecture, Liaoning University of Technology, Jinzhou 121001, China.
Int J Biol Macromol. 2017 May;98:201-207. doi: 10.1016/j.ijbiomac.2017.01.049. Epub 2017 Jan 14.
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, and C 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.
在本工作中，采用鼓泡气体的溶液等离子体工艺（SPP）来制备低聚壳聚糖。通过特性黏数降低率和降解动力学评估了 SPP 辐照鼓泡气体对壳聚糖降解的影响。研究了 OH 自由基的形成。通过扫描电子显微镜、X 射线衍射、热重分析以及紫外可见光谱、傅里叶变换红外光谱和 C 核磁共振谱测量了壳聚糖物理化学性质的变化。结果表明，鼓泡 SPP 辐照后特性黏数降低率明显降低，且鼓泡时的速率高于无鼓泡时的速率。辐照后壳聚糖的主要化学结构保持完整，但观察到低聚壳聚糖的形貌、结晶度和热稳定性发生了变化。特别是结晶度和热稳定性趋于降低。本研究表明 SPP 可有效用于壳聚糖的降解。
