含纳米Ag-TiO2的聚乙烯包装材料对大米储藏品质的影响

目的：研究含纳米Ag-TiO2聚乙烯（polyethylene，PE）包装材料对大米储藏防霉保鲜的效果。方法：在30 ℃、相对湿度80%条件下，用含纳米无机抗菌剂的PE包装袋储藏大米，研究纳米抗菌包装材料对储藏大米品质变化的影响。在90 d储藏期内跟踪检测大米的脂肪酸、糊化特性、质构等指标的变化及霉菌生长情况，分析纳米抗菌包装材料和普通包装材料对大米品质劣变的影响。结果：纳米复合包装储藏的大米，在90 d储藏期内的大米脂肪酸、糊化特性、质构等指标变化速度低于普通包装储藏（P＜0.05），同时霉菌培养后的大米含菌量小于普通包装袋储藏的二分之一。结论：纳米抗菌包装材料储藏大米相比于普通包装有利于大米品质的保藏。

Effect of Ag/TiO2 Nano-Plyethylene Packaging Material on Quality of Stored Rice

This study was focused on exploring a nano-packaging material applied in the preservation of stored rice.
Rice was stored at 30 ℃ and 80% humidity using a polyethylene (PE) packaging material containing nano inorganic
antimicrobial. The effect of the nano-packaging material on the quality of stored rice was studied by tracking the changes
in fatty acid value, gelatinization characteristics, textural properties and growth patterns of molds. The results showed
that fatty acid and gelatinization characteristics of rice stored with nano-packaging material changed more slowly than
those of rice stored with ordinary PE packaging material (P < 0.05). After 90 days of storage, the quantity of molds was
1.5 × 105 CFU/g, less than 50% of that observed with regular packaging. It was indicated that the quality of stored rice was
better and the aging was delayed using the PE packaging-containing inorganic antimicrobial.