聚乙烯醇基涂膜材料纳米SiO_2改性对其成膜包装效能特性的影响  

Effect of PVA-Based Coating Material Modified by Nano-SiO_2 on Properties of Film-forming Package

作　　者：雷艳雄[1] 尹月玲[1] 王佳媚[1] 靳国锋[1] 章建浩[1] 

机构地区：[1]南京农业大学食品科技学院,国家肉品质量与安全控制工程技术研究中心,教育部肉品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,江苏南京21009

出　　处：《食品科学》2012年第6期232-237,共6页Food Science

基　　金：江苏省科技攻关项目(BE2007320)

摘　　要：采用纳米SiO2对聚乙烯醇(PVA)基复合涂膜包装材料进行改性,通过测定PVA基纳米复合涂膜材料的成膜透湿率、吸水率、透光率、透气性以及抑菌效果,研究纳米SiO2对其成膜包装效能特性的影响。结果表明:纳米SiO2改性PVA基复合膜的透湿率(18.78g/(m2.d))比未改性PVA基复合膜(27.39g/(m2.d))降低31.43%,吸水率(1.40%)降低了35.34%,透O2率(0.055g/(m2.d)和透CO2率(0.174g/(m2.d))分别降低了17.91%和18.31%,且复合膜的抑菌性能也得到提高。纳米SiO2改性可显著提高PVA基纳复合涂膜材料的阻隔性,尤其是阻湿阻水性等成膜包装效能特性,改善其食品保鲜包装的应用效果。Due to the hydrophilic property,the application of poly vinyl alcohol（PVA） in food package is greatly limited.In this paper,the effect of PVA-based composite film modified by adding nano-SiO2 on packaging efficacy was evaluated by measuring vapor transmission rate,water-absorbing rate,transmittance,gas permeability and antibacterial capability.The results showed that vapor transmission rate（18.78 g/（m2·d））,water-absorbing rate（1.40%） of modified composite film decreased by 35.34%;O2 and CO2 penetration（0.055 g/（m2·d） and 0.174 g/（m2·d）） of modified composite film decreased by 17.91% and 18.31%,respectively,compared with those of PVA-based composite film without modification.Moreover,the antibacterial capability of PVA-based composite film was also improved after the modification with nano-SiO2.Therefore,modification with nano-SiO2 can significantly enhance the barrier performance,especially vapor barrier performance of PVA-based composite film,and consequently improve the application efficiency in food package.

关 键 词：聚乙烯醇 纳米SIO2 复合改性 成膜透湿率 透气性 

分 类 号：TS206.4[轻工技术与工程—食品科学]