壳聚糖浓度对改性无纺布草莓包装保鲜效果的影响

Effects of Chitosan Concentration on Preservation of Strawberry in Modified Non-Woven Packages

以质量分数为1.0%,1.5%和2.0%的壳聚糖保鲜液对定量为12.7 g/m2的无纺布进行改性,研究不同质量分数壳聚糖改性的无纺布包装对草莓保鲜效果的影响。研究结果表明,在室温条件下,改性无纺布对草莓的保鲜效果均优于未改性无纺布的,其中,以质量分数为1.5%的壳聚糖保鲜液改性无纺布包装的草莓,其保鲜效果最好,在储藏期内,其感官变化较小,失重率较低,储藏3 d后的硬度为0.95 kg/cm2,色差平均值为6.995 NBS,可溶性固形物含量在贮藏后期呈现出上升趋势。

The non-woven（12.7 g/m2） was modified by coating chitosan of concentration 1.0%, 1.5% and 2.0%respectively. The packaging bags were made from the modified and unmodified non-woven. The effects of chitosan concentration on the preservation of strawberries in packages were studied with the unmodified non-woven as the control group. The results showed that the modified non-woven bags had better preservation effect on strawberries compared with the unmodified at room temperature. The optimal was the modified non-woven with coating chitosan of 1.5%. During the storage period, strawberries experienced small sensory changes and low weight loss with the average hardness being 0.95kg/cm2 and the average color difference being 6.995 NBS. Furthermore, soluble solid content was on the rise in the later period of storage.