纳米TiO_2_玉米淀粉复合涂膜对圣女果保鲜效果的研究_宋贤良.pdf

※包装贮运食品科学 2010, Vol. 31, No. 12 255
纳米玉米淀粉复合涂膜对圣女果
保鲜效果的研究
宋贤良,叶盛英,黄苇,周奕
(华南农业大学食品学院,广东广州 510642)
摘要:通过高效分散剂和超声波分散技术,将纳米 TiO2 均匀分散在玉米淀粉涂膜液中,对圣女果进行涂膜处
理,探讨其对贮藏过程中果实失重率、可溶性固形物含量、硬度、腐烂率、VC 含量及总酸含量变化的影响,以
研究纳米 TiO 2/ 玉米淀粉复合涂膜液对圣女果涂膜保鲜的效果。结果表明:随着复合涂膜液中纳米 TiO 2 用量的增
加,圣女果的失重率、可溶性固形物含量和腐烂率是先减小后增大,而硬度、VC 含量和总酸含量则呈现先增大
后减小的变化规律。纳米 TiO2 用量为 %(m/m,以玉米淀粉的质量为基准)时的保鲜效果最好,涂膜后的圣女
果在室温(25℃)贮藏 11d,其失重率、可溶性固形物含量、腐烂率分别比对照组降低了 %、%、%,
硬度、VC 含量、总酸含量分别是对照组的 、、 倍。说明纳米 TiO2 在水果涂膜保鲜方面具有一定的
应用前景。
关键词:纳米 T i O 2 ;玉米淀粉;圣女果;保鲜
Fresh-Keeping Effect of Nano-Titania/Corn pound Coating on Cherry Tomato
SONG Xian-liang,YE Sheng-ying,HUANG Wei,ZHOU Yi
(College of Food Science, South China Agricultural University, Guangzhou 510642, China)
Abstract: Polyvinyl pyrrolidone (PVP), a highly effective dispersant, and ultrasonic technique were used for the homogeneous
dispersion of nano-titania in corn starch paste to yield pound coating. The coating was used to treat cherry tomato and the
weight loss, the contents of soluble solids, VC and total acid, hardness and percentage of rotten fruits of treated cherry tomato
during storage were periodically measured in order to investigate its fresh-keeping effect. The results showed that with increasing
amount of added nano-titania, weight loss, soluble solid content and percentage of rotten fruits first decr