Hybrid and biocompatible cellulose/polyurethane nanocomposites with water-activated shape memory properties
| Autor: | Ainara Saralegi, Ana Alonso-Varona, Teodoro Palomares, Maria Angeles Corcuera, Leire Urbina, Aloña Retegi, Arantxa Eceiza |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Polymers and Plastics Cell Survival Polyurethanes Biocompatible Materials 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Cell Line Nanocomposites Mice chemistry.chemical_compound Coating Elastic Modulus Tensile Strength Cell Adhesion Materials Chemistry Animals Transition Temperature Cellulose Fourier transform infrared spectroscopy Cell Proliferation Polyurethane Nanocomposite Organic Chemistry Water Shape-memory alloy Fibroblasts 021001 nanoscience & nanotechnology 0104 chemical sciences Gluconacetobacter Membrane chemistry Chemical engineering Bacterial cellulose engineering 0210 nano-technology |
| Zdroj: | Carbohydrate Polymers. 216:86-96 |
| ISSN: | 0144-8617 |
| DOI: | 10.1016/j.carbpol.2019.04.010 |
| Popis: | Water-activated shape memory bacterial cellulose/polyurethane nanocomposites were prepared by the immersion of bacterial cellulose (BC) wet membranes into waterborne polyurethane (WBPU) dispersions for different times. The high affinity between the hydrophilic BC and water stable polyurethane led to the coating and embedding of the BC membrane into the WBPU, facts that were confirmed by FTIR, SEM and mechanical testing of the nanocomposites. The mechanical performance of the nanocomposites resulted enhanced with respect to the neat WBPU, confirming the reinforcing effect of the BC membrane. An improvement of the shape fixity ability and faster recovery process with the presence of BC was observed. In 3 min, the nanocomposite with highest BC content recovered the 92.8 ± 6.3% of the original shape, while the neat WBPU only recovered the 33.4 ± 9.6%. The obtained results indicated that 5 min of impregnation time was enough to obtain nanocomposites with improved mechanical performance and fast shape recovery for potential biomedical applications. The present work provides an approach for developing environmentally friendly and biocompatible BC/polyurethane based materials with enhanced mechanical and shape memory properties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect