期刊论文

Composite Films Contained Rare Earth Lanthanum Doped Nano TiO_2 as Efficient Materials for Packaging Preservation

Wang, Hanqing(hqwang2011@126.com)

中文

材料导报

1005-023X

2018

32

12

4357-4362

10.11896/j.issn.1005-023X.2018.24.027

湖南省研究生创新基金（CX2016B634）；

本校为通讯机构

水果和菌类均为货架期较短的商品,二者皆易因呼吸作用与微生物感染导致失水与腐坏。本工作首次报道了将稀土镧掺杂纳米TiO_2(La~(3+) -TiO_2)粒子与PVA共混,采用溶液浇铸法制备了La~(3+) -TiO_2复合包装薄膜,并将其用于草莓和姬松茸保鲜的探索研究。XRD、SEM和LPSA表征显示,稀土镧的掺杂引起了纳米TiO_2晶格的畸变,其粒径变小、表面能增大,掺杂后的纳米TiO_2在PVA基体中的分散性得到提高。透湿和透氧率检测结果表明,La~(3+) -TiO_2的加入有利于复合薄膜阻隔性能的增加,当La~(3+) -TiO_2质量分数为1.6%时,透湿率降低45.9%,透氧率降低38.0%,复合薄膜阻隔性能最佳。抗菌率检测结果显示,稀土镧的掺杂...

Fruits and fungus are short-shelf life products which are easily decaying caused by micro-organism and dehydration caused by respiration. This paper presented a pioneering attempt to prepare PVA-based packaging composite films contained lanthanum doped nano-TiO2 (La3+-TiO2) and to apply it as preservation material for strawberry and agaricus blazei. Characterizations of La3+-TiO2 were done by XRD, SEM and LPSA. The distortion occurred in lattice of TiO2 and led the particle size reduced, surface energy increased and dispersity in PVA matrix imp...