Preparation and Properties of Food Wrapping Paper Coated on a Complex Sizing Agent of Oxidized Nanofibrillated Cellulose/Cationic Guar Gum

Abstract

AbstractWith the promotion of the looming restrictions and the refuse classification, the green environmental protection and barrier performance of paper packaging materials has become a research hotspot of packaging materials. In this study, oxidized nanofibrillated cellulose (ONFC) was prepared by the nanofibrillated cellulose (NFC) oxidized by sodium periodate. The complex sizing agent of oxidized nanofibrillated cellulose (ONFC)/cationic guar gum (CGG) was prepared by combinding oxidized nanofibrillated cellulose (ONFC) with cationic guar gum. The obtained sizing agent was employed to coat on food packaging base paper. Water vapor permeability (WVP) and the digital printing suitability of the coated paper was evaluated. The results showed that when the content of ONFC and NFC increased from 0 wt% to 0.75 wt%, the WVP of the coated paper decreased from 3.12 × 10−11 g cm−1s−1pa−1 to 1.63 × 10−11 g cm−1s−1pa−1 and 2.08 × 10−11 g cm−1s−1pa−1, respectively. It shows that ONFC and NFC can improve the film-forming performance of the sizing agent, which can improve the water vapor barrier performance of the coated paper. For the digital printing proofing of the coated paper, the ink-jet printing method has a larger color gamut. The tone reproduction has a better linear relationship. It presents better digital printing proofing performance. The coated paper coated by the complex sizing agent has broad application prospects in the field of personalized packaging materials and labels.KeywordsOxidized nanofibrillated cellulose (ONFC)Cationic guar gum (CGG)Sizing agentFood wrapping paper