食品科学2017，Vol.38Issue(17)：132-137,6.DOI:10.7506/spkx1002-6630-201717022
壳聚糖、纳米壳聚糖对聚乙烯醇膜结构与性能的影响
Effect of Chitosan and Chitosan Nanopaticles on the Structure and Properties of Poly-(vinyl alcohol) Film
摘要
Abstract
The properties of poly-(vinyl alcohol) (PVA) films added with chitosan (CS) and chitosan nanoparticles (NCS) were evaluated. A colorimeter and an ultraviolet (UV) spectrophotometer were used to investigate the optical properties. A gas permeability tester and a water vapor permeability tester were used to test the gas permeability and water vapor permeability, respectively. The moisture absorption capacity was measured under isothermal conditions, and the experimental data were fitted with various common isotherm models. Fourier transform infrared (FT-IR) spectroscopy and differential scanning calorimetry (DSC) were used to characterize the molecular structure and crystallinity. The results showed that the addition of CS enhanced the UV barrier properties of PVA film and the effect of NCS was more prominent. The addition of CS or NCS reduced the gas permeability and improved the water vapor permeability. Moisture absorption isotherms of PVA, PVA/CS and PVA/NCS films could be best fitted with the GAB equation (R2 > 0.98). FT-IR results indicated that PVA/CS and PVA/NCS films were homogenous with intermolecular hydrogen bonds being formed between PVA and CS. DSC analysis showed that the addition of CS or NCS slowed down the crystallization rate, reduced the degree of crystallinity, and increased the endothermic enthalpy of PVA.关键词
壳聚糖/纳米壳聚糖/聚乙烯醇膜/光学性能/吸湿等温曲线Key words
chitosan/chitosan nanoparticles/poly-(vinyl alcohol) film/optical properties/moisture absorption isotherm分类
轻工纺织引用本文复制引用
李晓燕,方健,周韵致..壳聚糖、纳米壳聚糖对聚乙烯醇膜结构与性能的影响[J].食品科学,2017,38(17):132-137,6.基金项目
北京高等学校青年英才计划项目(YETP0761) （YETP0761）
