Li Ning, Liu Chang, Niu Li, Li Xu, Feng Jacko, Liu Zhiming
College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, P.R. China.
AEMG Academy, Melbourne 3127, Australia.
Int J Biol Macromol. 2025 Apr;302:140456. doi: 10.1016/j.ijbiomac.2025.140456. Epub 2025 Jan 28.
In this study, we examined the plasticizing effects of 1-butyl-3-Methylimidazolium Chloride (BmimCl), glycerol, and their combination on chitosan (CS) films. Additionally, we examined the effect of plasticizers for chitosan films structure and physicochemical properties of CS films by FTIR, XRD, SEM and mechanism of action of plasticizers on the structure of CS films. The results indicated that the interaction between BmimCl and chitosan is mainly ionic interaction and hydrogen bonding, while the interaction between glycerol and CS is mainly hydrogen bonding. The utilization of a 1:1 mixture of BmimCl and glycerol as a plasticizer exhibits a synergistic impact on the film samples. In dry conditions, the elongation at break of the CS/BmimCl/Gly film reached 17.47 %, representing a 33 % and 78 % increase compared to the CS/BmimCl and CS/Gly films, respectively. In moist environments, the mechanical strength of CS/BmimCl/Gly film was significantly enhanced to 35.09 MPa compared to the CS/BmimCl and CS/Gly films. Notably, the elongation at break of the films remained at 37.05 %, without compromising their flexibility properties.
在本研究中，我们考察了1-丁基-3-甲基咪唑氯盐（BmimCl）、甘油及其组合对壳聚糖（CS）膜的增塑效果。此外，我们通过傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、扫描电子显微镜（SEM）研究了增塑剂对壳聚糖膜结构及CS膜理化性质的影响，以及增塑剂对CS膜结构的作用机制。结果表明，BmimCl与壳聚糖之间的相互作用主要是离子相互作用和氢键作用，而甘油与CS之间的相互作用主要是氢键作用。将BmimCl和甘油按1:1混合用作增塑剂对薄膜样品具有协同作用。在干燥条件下，CS/BmimCl/甘油膜的断裂伸长率达到17.47%，分别比CS/BmimCl膜和CS/甘油膜提高了33%和78%。在潮湿环境中，与CS/BmimCl膜和CS/甘油膜相比，CS/BmimCl/甘油膜的机械强度显著提高至35.09MPa。值得注意的是，薄膜的断裂伸长率保持在37.05%，而不影响其柔韧性。
