Effect of Crosslinking Modification by Combined Use of Borax, Nano-SiO2 and Nano-TiO2 on Moisture Permeability and Moisture Permeability of PVA-based Film

doi:10.7506/spkx1002-6630-201414004

FOOD SCIENCE

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Effect of Crosslinking Modification by Combined Use of Borax, Nano-SiO2 and Nano-TiO2 on Moisture Permeability and Moisture Permeability of PVA-based Film

LIU Yao, ZHANG Jian-hao*, LONG Men, LI Can, LIU Gui-chao, MEI Yu

National Center of Meat Quality and Safety Control, Key Laboratory of Food Processing and Quality Control,
Ministry of Agriculture, Synergetic Innovation Center of Food Safety and Nutrition, College of Food Science and Technology,
Nanjing Agricultural University, Nanjing 210095, China

Online:2014-07-25 Published:2014-08-26
Contact: ZHANG Jian-hao

Abstract

Abstract:

The moisture barrier performance of polyvinyl alcohol (PVA)-based composite packaging material was improved
by crosslinking modification using borax, nano-SiO2 and nano-TiO2 in combination. The water vapor permeability (WVP)
of the formed film as a function of the amounts of the crosslinking agents added was investigated by response surface
methodology. The results showed that the crosslinking modification significantly reduced (P＜0.05) film WVP, and that
the interaction of borax with either nano-SiO2 or nano-TiO2 had a significant effect on the WVP (P＜0.05). The optimal
concentrations of nano-SiO2, nano-TiO2 and borax were 0.033, 0.042 and 0.032 g/100 mL, respectively, giving minimum
WVP of (9.729±0.074) mg/(m·d·kPa), 44.68% lower than the non-modified PVA-based film. The modified PVA-based film
exhibited increased antibacterial effect, and reduced the total number of E. coli colonies by one order of magnitude.

Key words: nano-SiO2, nano-TiO2, borax, polyvinyl alcohol (PVA), water vapor permeability, antibacterial effect

CLC Number:

TS206.4

LIU Yao, ZHANG Jian-hao*, LONG Men, LI Can, LIU Gui-chao, MEI Yu. Effect of Crosslinking Modification by Combined Use of Borax, Nano-SiO2 and Nano-TiO2 on Moisture Permeability and Moisture Permeability of PVA-based Film[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201414004.

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Effect of Crosslinking Modification by Combined Use of Borax, Nano-SiO2 and Nano-TiO2 on Moisture Permeability and Moisture Permeability of PVA-based Film

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