期刊论文

Composite Films Containing Rare Earth Lanthanum Doped Nano-ZnO as Efficient Materials for Packaging Preservation

中文

湖南工业大学学报

1673-9833

2017

9

6

1-8

10.3969/j.issn.1674-7100.2017.06.001

湖南省研究生创新基金资助项目（CX2016B634）；

本校为其他机构

制备稀土镧掺杂纳米ZnO（La~（3＋）-ZnO）粒子,将其分散于PVA水溶胶中,利用溶液浇铸法制备La~（3＋）-ZnO复合保鲜薄膜,并将其应用于草莓和姬松茸的保鲜研究中。XRD、LPSA和TEM表征显示,稀土镧的掺杂引起了纳米ZnO晶格的畸变,其粒径变小,表面能增大,分散性提高。水蒸气透过率和透氧率检测结果表明,当La~（3＋）-ZnO的添加质量分数为1.2%时,复合薄膜阻隔性能最佳,与纯PVA薄膜相比,La~（3＋）-ZnO复合保鲜薄膜的水蒸气透过率降低了42.7%,透氧率降低了35.6%。抗菌率测试结果显示,稀土镧的掺杂拓宽了纳米ZnO对光谱的利用范围,复合保鲜薄膜在自然光下对大肠杆菌和金黄色葡萄球菌的抗菌率分别达到96....

Lanthanum doped nano-ZnO（La~（3＋）-ZnO） was firstly prepared and dispersed into PVA sol to produce packaging composite films by solution pouring method,and its preservation performances for strawberry and agaricus blazei were investigated.Characterizations of La~（3＋）-ZnO were done by XRD,TEM and LPSA.The distortion occurred in lattice of ZnO with the particle size reduced,surface energy increased and dispersibility improved,all caused by doping with La~（3＋）.Barrier performance of the composite films was improved by adding La~（3＋）-Zn...