纳米TiO_2与SiO_2改性PVA基复合涂膜研究

The research of Nano- Ti O_2 and Nano- SiO_2 modification on PVA matrix composites packaging materials

为有效提高聚乙烯醇(PVA)的成膜阻湿与抑菌性能,在PVA基膜材料中添加纳米Si O2、Ti O2及TAIC(异氰脲酸三烯丙酯),利用响应曲面实验方法研究纳米Si O2、Ti O2对PVA基涂膜包装材料成膜透湿性能的影响及交互作用。结果表明:纳米Si O2、Ti O2与TAIC对成膜透湿率有显著的交互作用,随TAIC添加量的增加,涂膜材料成膜阻湿抑菌性能随着纳米Si O2和纳米Ti O2比例的适当增大而提高。回归优化的最优组,纳米Si O2添加量0.04g/100m L,纳米Ti O2添加量0.05g/100m L,TAIC添加量2.42g/100m L时透湿率最低,成膜透湿率比对照降低48.09%(p<0.05),在光催化条件下,抑菌性能比对照提高62.39%。

In order to improve the bacteriostasis and resistance wet performance of PVA matrix composites packaging materials , PVA solution was used as the matrix, nano-SiO2, nano-TiO2and TAlC were added to modify it .To investigate the influence of nano-SiO2 and nano-TiO2 on the bacteriostasis and resistance wet performance of PVA matrix composite packaging materials, a response surface experiment was used .The results showed that there was a significant interaction of TAlC and nano-SiO2, nano-TiO2 on the resistance wet performance of PVA matrix composites packaging materials, the bacteriostasis and resistance wet performance of PVA matrix composites packaging materials was increased with the appropriate increase of the addition of nano-SiO2 and nano-TiO2, with the increase of the addition of TAIC.The optimum conditions were nano-SiO2 0.04g/100mL, nano- TiO2 0.05g/100mL,TAIC 2.42g/100mL.The water vapor transmission rate （WVTR）of the optimal group film was reduced by 48,09% （p 〈 0.05）than the film without nano-materials.The bacteriostasis of the optimal group film that added nano-SiO2 and nano-TiO2 was increased by 62.39% than the film without nano-materials, under the UV photocatalytic conditions.