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Updated: Aug 25, 2025
Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
Metal-coordination and surface adhesion-assisted molding enabled strong, water-resistant carboxymethyl cellulose
Weisheng Yang1, Yang Song2, Chang Li2
1College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; Nanjing IPE Institute of Green Manufacturing Industry, Nanjing, Jiangsu 211135, China; Jiangsu Co-innovation Center for Efficient Processing and Utilization of Forestry Resources, Nanjing Forestry University, Nanjing, Jiangsu 210037, China.
Abstract:
Developing renewable and biodegradable materials derived from cellulose is an attractive strategy to replace petroleum-derived plastics. In this study, metal ions (Cu2+, Fe3+, and Al3+) were added as a green binder into carboxymethyl cellulose (CMC) films to improve their mechanical properties and water resistance capacity. The tensile strengths of CMCAl3+ films were 133 MPa and 99 MPa at 43 % and 97 % humidity, respectively, which were comparable to or greater than those of the majority of commercially available plastics. Additionally, we proposed an interfacial adhesion-assisted molding strategy for forming cellulose-based films, avoiding film wrinkles and unevenness during drying and metal-coordination formation. The resultant films exhibited high transparency, excellent mechanical properties, water resistance capacity, ultraviolet light (UV) shielding, and antibacterial activity. In summary, the biodegradable, eco-friendly, excellent application performance, and adaptability of CMCMn+ (Mn+: polyvalent metal ions) films open new prospects as a viable alternative to non-biodegradable plastics.
