Composite films obtained from a waterborne biopolyurethane. Incorporation of tartaric acid and nanocellulose
| Autor: | M. E. Victoria Hormaiztegui, Veronica Lujan Mucci, Mirta Ines Aranguren |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Materials science Diol INGENIERÍAS Y TECNOLOGÍAS 01 natural sciences Nanocellulose Biotecnología Industrial chemistry.chemical_compound medicine Bio-based waterborne polyurethane Polyurethane 010405 organic chemistry Bioproductos Biomateriales Bioplásticos Biocombustibles Bioderivados etc Cellulose nanocrystals Dynamic mechanical analysis 0104 chemical sciences chemistry Chemical engineering Castor oil Polycaprolactone Tartaric acid Isophorone diisocyanate Agronomy and Crop Science 010606 plant biology & botany medicine.drug |
| Popis: | Unmodified castor oil (CO) and tartaric acid (TA), a dihydroxy acid that can be obtained from various by-products of the grape processing to wine, were used in order to obtain bio-based waterborne polyurethanes (WBPUs). Isophorone diisocyanate (IPDI) was incorporated to the formulation to obtain transparent films. The effect of the incorporation of polycaprolactone diol (PCL), a biodegradable diol was investigated in order to increase the flexibility of the WBPU. Additionally, cellulose nanocrystals (CNC) were used as bio-reinforcement for these polyurethanes (thus, increasing the use of bio resources). The final neat and composite material films were characterized by ATR-FTIR, XRD, DMA and TGA. The addition of PCL in the polyurethane formulation was confirmed by FTIR and led to the decrease of the Tg of the films, thus to a more flexible material. CNC addition resulted in an increase of the storage modulus of the material, at all the temperatures tested. CNCs interact and generate a three-dimensional network of the reinforcement (>2 wt.%), improving the ability of the films to maintain structural integrity when they were immersed in water. Fil: Hormaiztegui, Maria Eugenia Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina Fil: Mucci, Veronica Lujan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina Fil: Aranguren, Mirta Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|