Preparation and properties of paint prepared with nanofibrillated cellulose and waterborne epoxy resin

Abstract

A new type of water-based paint was prepared with Salix nanofibrillated cellulose (NFC), epoxy resin (E-51), and emulsified curing agent as raw materials. The mechanical blending of coated films was characterized. The mechanical properties and friction and wear properties of the coated film were tested. Microstructure was studied by scanning electron and transmission electron microscopies, thermogravimetric analysis, and other methods. The results showed that when the amount of NFC was 1.0%, the overall performance of the coated film was improved. Herein, the flexibility was 1 mm, the adhesion was 0, the hardness was 4 H, the wear value was 15 mg/100 r, the impact resistance was 49 cm, and the gloss was 85 Gs. The friction and wear coefficient of the composite coated film after the addition of cellulose nanofibers was reduced to 0.171, which was 58.5% lower than that before the addition of cellulose nanofibers. The surface observation after abrasion indicated that the composite coated film mainly experienced abrasive wear.