1 Improved Oil Resistance of Cellulose Packaging Paper by 2 Coating with Natural Polymer Derived Materials 3 Feijie Wang1, Liqiang Wang1,*, Xinchang Zhang1, Shufeng Ma2 4 1 Jiangsu Provincial Key Laboratory of Food Advanced Manufacturing Equipment 5 Technology, School of Mechanical Engineering, Jiangnan University, Wuxi, 214122, 6 China 7 2 School of Food Engineering, Jiangnan University, Wuxi, 214122, China 8 *Email:
[email protected] 9 10 Abstract: Paper is widely used as food packaging due to its good mechanical strength 11 and degradability. However, it has a relatively strong affinity for water and oil, which 12 limits its application scope. In this work, we prepare two types of coated paper to 13 investigate, the influence the air permeability and polarity on the oil resistance of the 14 coated paper. The results showed that reducing the air permeability improved the grease 15 resistance of the coated paper. High surface energy coatings also showed better oil 16 resistance because of their higher content of polar components that resulted in a higher 17 resistance to grease. The mechanical properties of the paper also improved after 18 applying the coating. These natural derived materials offer an alternative to the fluoride- 19 containing materials currently used in the market to improve the wettability of paper. 20 Keywords: coated paper · oil resistance · air permeability · polarity 21 Introduction 22 As the variety of foods containing grease is abundant, the types of oil-resistant 23 materials used in food packaging has diversified in recent years. Environmental 24 protection and safety issues continue to be important, and as a result, scholars have paid 25 increasing attention to paper packaging materials (Coltelli et al.