制备了不同纳米SiOx添加量的纳米SiOx/壳聚糖复合膜,研究纳米SiOx对复合膜CO2透气性能的影响,并且以"米良1号"猕猴桃为试材,在室温20～22℃,相对湿度63%～70%条件下,研究纳米SiOx添加量对猕猴桃呼吸作用以及对还原糖和总酸含量的影响。结果表明:纳米SiOx添加量为0.03 g/100 mL时,膜的CO2透过系数比对照降低了67.30%,猕猴桃呼吸高峰出现在第13天,比对照延迟了7天,并可有效地保持还原糖和总酸含量,说明该处理对猕猴桃的成熟衰老有明显的抑制作用。

Different amounts of nano-SiOx were added into chitosan composite membranes.The CO2 permeability property of these composite membranes were measured.Results showed that when the content of nano-SiOx of the composite films was 0.03 g/100mL,CO2 permeability property of the chitosan composite membranes was reduced by 67.30 % compared to the pure chitosan membranes.The diverse composite nano-SiOx/chitosan solutions were prepared.After receiving coating treatment with the solutions,Kiwifruits(Miliang NO.1) were stored under 63%~70% relative humidity at 20 ~ 22℃.The respiration,reducing sugar and titrable acidity were evaluated during the storage.When 0.03 g/100mL nano-SiOx were added and coated on the fruits,breathing peak appeared on the 13 day,which was 7 days delay compared to the no nano-SiOx of chitosan membranes.Reducing sugar and titrable acidity were significantly maintained.These results provided important information regarding the ripening physiology of kiwifruit and indicated that the storage life of fresh fruit was extended by edible coatings containing nano-SiOx.