为探寻安全高效的可食性涂膜应用于柑橘保鲜,选取壳聚糖(chitosan,CS)和纳米纤维素(nanocrystal cellulose,NCC)两种天然材料进行复合,对红桔进行涂膜保鲜。首先制备了独立膜,考察了NCC对独立膜抗张性能和透过性能的影响;然后将NCC/CS复合涂膜用于红桔保鲜,考察其对红桔腐烂率和各项生理品质指标的影响。结果表明,NCC的添加有助于提高复合独立膜的抗张性能,降低其吸湿性。在红桔保鲜中应用时,相较于CS涂膜,NCC/CS复合涂膜可进一步降低红桔在贮藏期间的腐烂率,减少丙二醛的积累,有利于保持果实硬度,并维持其营养物质的含量。其中,NCC质量分数为6%的6NCC/CS复合涂膜对红桔的保鲜效果最为显著。
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