纳米SiO2对PVA基复合涂膜包装材料成膜透湿性能的影响  

Effect of nano-SiO_2 on water vapor transmission rate of formed film of PVA-based composite coating-packaging material

作　　者：雷艳雄[1] 尹月玲[1] 靳国锋[1] 章建浩[1] 

机构地区：[1]国家肉品质量与安全控制工程技术研究中心,教育部肉品质加工与质量控制重点实验室,农业部农畜产品加工与质量控制重点开放实验室,南京农业大学,南京210095

出　　处：《农业工程学报》2011年第10期359-364,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：江苏省科技攻关项目(项目编号:BE2007320)

摘　　要：为改善聚乙烯醇(PVA)涂膜的阻湿保鲜效能特性,该文采用添加纳米SiO2对PVA基复合涂膜包装材料进行改性,应用响应曲面方法研究SiO2、硬脂酸、戊二醛对三元复合涂膜材料成膜效能特性的影响及交互作用。结果表明:加入纳米SiO2改性可有效提高PVA基复合涂膜包装材料的阻水、阻湿性能,优化组成膜透湿率8.18g/(m2.d)比对照组(不添加纳米SiO2的PVA复合膜)降低26.61%(p<0.05);硬脂酸、戊二醛对复合涂膜材料成膜透湿率的影响与纳米SiO2存在显著的交互作用,每100mL0.05g/mL的PVA溶液中纳米SiO2添加量在小于0.05g范围内随着SiO2含量增大,复合涂膜材料成膜透湿率随硬脂酸、戊二醛的比例增加而降低,阻湿性能提高。Application of polyvinyl alcohol（PVA） in food packaging is greatly limited because of its hydrophilic property.PVA-based composite coating-packaging material was modified by adding nano-SiO2 in order to improve the efficiency of water vapor barrier.The individual and interactive effects of nano-SiO2,stearic acid,and glutaraldehyde on the water vapor transmission of formed film of composite coating-packaging material were investigated by response surface methodology.The results showed that the water vapor barrier performance of the PVA-based composite coating-packaging material could be effectively enhanced by modifying of nano-SiO2.The water vapor transmission ratio of formed film of optimize group（8.18 g/（m2·d）） was decreased by 26.61%（P0.05） compared with the control group（no nano-SiO2）.There were significant interactions between nano-SiO2 and stearic acid and between nano-SiO2 and glutaraldehyde for the effects on the water vapor transmission of formed film of composite coating-packaging material.With the increase of nano-SiO2 within the range below 0.05 g in 100 mL PVA solution（0.05 g/mL）,the water vapor transmission rate of composite coating-packaging material was decreased and the water vapor barrier performance was improved with the increase of the proportion of stearic acid and glutaraldehyde.

关 键 词：薄膜 包装 优化 聚乙烯醇(PVA) 纳米SIO2 复合涂膜包装材料 透湿性 

分 类 号：TS206.4[轻工技术与工程—食品科学]