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The increased use of petroleum-based plastics as food packaging materials has led to serious problems due to its non-biodegradability. This study discussed the feasibility of preparing hydrophobic paper packaging materials using soybean residue nanocellulose as coating. A hydrophobic coating with soybean residue nanocellulose waterproof agent was prepared by chemical modification, and super hydrophobic coated paper was prepared by coating technology. The results show that the water contact angle of the coated paper is greater than 150°, and it has excellent wear resistance and mechanical properties. When the waterproof coated paper is folded repeatedly, the water contact angle of the material does not change significantly at high and low temperatures or other adverse means, indicating that it has certain stability. Soaking in daily common drinks will not affect its waterproof property, so this material provides a foundation for the development of liquid packaging and provides a feasibility for the production of green degradable waterproof agent. [Display omitted] • The water contact angle of the prepared hydrophobic packaging paper is greater than 150°. • AKD reacts with hydroxyl groups of nanocellulose molecules to form β- Keto ester. • Waterproof paper has potential applications in liquid packaging (paper cups, beverage containers, ect.). • Green and environment-friendly food packaging paper with coating technology. [ABSTRACT FROM AUTHOR]

At present, people are paying more and more attention to the development of sustainable biological materials. In this study, green magnetic hydrogel was prepared by blending Soybean residue cellulose nanofibrils (CNF)，poly (vinyl alcohol), diatomite and nano-Fe 3 O 4 for Cu2+ removal. Results showed that the decrease of CNF diameter improved the mechanical property and swelling of the magnetic CNF hydrogel (the maximum tensile strength was 2.3Mpa) for better Cu2+ adsorption. Adsorption studies displayed that the adsorption of Cu2+ followed the pseudo-second-order kinetic model, and the adsorption process is mainly chemical adsorption. This work provided a feasible method to fabricate magnetic hydrogel from green renewable resource as a new and promising adsorbent. • Magnetic hydrogel adsorbs Cu2+ by chemical attraction. • Freeze melting forms crosslinking structure and increases crosslinking density. • Interchain and intrachain hydrogen bonds improve tensile strength. • Magnetic hydrogel has good magnetic response ability. [ABSTRACT FROM AUTHOR]