乌贼墨黑色素纳米粒对明胶-普鲁兰多糖复合膜的性能影响及表征

为探究乌贼墨黑色素纳米粒(MNP)对明胶-普鲁兰多糖(Gel/Pul)复合膜的改性效果,本研究以乌贼墨为原料,利用动态高压微射流技术制备MNP,以明胶、普鲁兰多糖为成膜基质,添加MNP制备纳米复合膜,通过水蒸气透过率(WVP)、透油率、光学性能、机械性能和自由基清除率等指标,考察了MNP添加量对复合膜的物理特性和抗氧化能力的影响,并通过傅里叶红外光谱(FTIR)和扫描电镜(SEM)进行微观表征,探究MNP与成膜基质间的相互作用。结果表明,MNP与Gel/Pul基质存在氢键的相互作用,具有良好的生物相容性;MNP的加入可以改善纳米复合膜的水蒸气阻隔性和机械性能;当MNP添加量为1 wt%时,复合膜的水蒸气透过率最小,抗拉强度达到最大值;随着MNP添加量的增加,纳米复合膜表现出优越的紫外阻隔性和抗氧化性能。本研究结果为MNP应用于可食膜改性及食品包装提供了一定的理论依据。

Effect of Melanin Nanoparticles on Properties and Characterization of Gelatin/Pullulan-Based Composite Films

To explore the effect of melanin nanoparticles (MNP) on the gelatin/pullulan (Gel/Pul)-based composite films, MNP were prepared by dynamic high pressure microfluidization technology with sepia ink as the raw material. The nanocomposite films were prepared with Gel/Pul matrix incorporated with varied amounts of MNP. The effects of MNP addition on the physical properties and antioxidant capacity of the nanocomposite films were investigated by water vapor permeability (WVP), oil permeability, optical properties, mechanical properties and free radical scavenging rate. The interaction between MNP and Gel/Pul matrix was characterized using fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). There was hydrogen bond interaction between MNP and Gel/Pul matrix, indicating that they had good biocompatibility. The incorporation of MNP could improve the water vapor barrier and mechanical properties of nanocomposite films. When the amount of MNP was 1 wt%, the WVP of the nanocomposite films was the lowest and the tensile strength reached the maximum. With the increase of MNP, the nanocomposite films showed superior UV barrier and antioxidant properties. This study provides a possible way to utilize MNP in the modification of edible films and in the field of food packaging.