共沉淀法制备纤维素/天然橡胶薄膜及其性能研究OA

Natural rubber(NR)is a crucial strategic resource;however,its inherent mechanical properties may not fully meet the demands of certain applications,often necessitating reinforcing agents for modification.Traditional rubber processing heavily relies on petroleum-based materials,such as carbon black(CB),which poses significant environmental pollution and is unsuitable for light-colored products.To address environmental sustainability and reduce pollution,employing green and renewable cellulose as a reinforcing agent for light-colored rubber products presents a promising technological solution.The compatibility between cellulose and natural rubber determines the performance of the modified material.In this study,hydroxyethyl cellulose(HEC),sodium carboxymethyl cellulose(CMC),and nanocellulose(CNF)were utilized as raw materials to modify natural rubber films,aiming to significantly enhance their overall properties.Characterizations of the composite film materials through FT-IR,XPS,mechanical properties,crosslink density,hardness,and contact angle tests reveal that all three types of cellulose can increase the crosslink density of natural rubber,with HEC showing the highest improvement,achieving an increase by a factor of 3.33.Additionally,the hydrogen bonding formed between cellulose and natural rubber plays a critical role in the mechanical properties of the natural rubber films.The tensile strength of the HEC/NR composite film reached a maximum of 36.17 MPa,with an elongation at break of 2 138.78%.The incorporation of cellulose significantly enhanced the hydrophilicity of the composite films,primarily attributed to the abundant hydroxyl groups in the cellulose molecules.This finding provides a novel approach to improving the wettability and processability of natural rubber products and opens new possibilities for the application of composite film materials across various fields.