Mechanical, dynamic-mechanical, and thermal properties of soy protein-based thermoplastics with potential biomedical applications
- 13 March 2002
- journal article
- Published by Taylor & Francis Ltd in Journal of Macromolecular Science, Part B
- Vol. 41 (1), 33-46
- https://doi.org/10.1081/mb-120002344
Abstract
In this study the tensile and the dynamic-mechanical behavior of injection-molded samples of various soy protein thermoplastic compounds were evaluated as a function of the amount of glycerol, type and amount of ceramic reinforcement, and eventual incorporation of coupling agents. The incorporation of glycerol into a soy-based matrix resulted in its plasticization, as confirmed by the drop in stiffness (storage and elastic modulus) above 20°C and a decrease in the protein glass transition temperature. Differential scanning calorimetric thermograms proved the occurrence of conformational changes in the soy protein during processing. Furthermore, the developed soy protein-based thermoplastics showed a thermal stability up to 100°C, as confirmed by thermogravimetric analysis. The reinforcement of the soy protein matrix with a ceramic filler (tricalcium phosphate) was shown to be effective for amounts above 10% w/w. The introduction of an amino-coupling agent led to a plasticizing effect, detected in the mechanical and dynamic-mechanical properties of the resulting materials. The results also show a good qualitative agreement between the properties obtained from quasi-static and dynamic experiments. The materials present a range of properties that might allow for their use eventually in a range of biomedical applicationsKeywords
This publication has 11 references indexed in Scilit:
- The influence of maltodextrins on the structure and properties of compression-molded starch plastic sheetsJournal of Applied Polymer Science, 1999
- Osteoinduction by calcium phosphate biomaterialsJournal of Materials Science: Materials in Medicine, 1998
- Effect of Hydrophilic Plasticizers on Thermomechanical Properties of Corn Gluten MealCereal Chemistry Journal, 1998
- Osteoclastic resorption of calcium phosphate ceramics with different hydroxyapatite/β-tricalcium phosphate ratiosBiomaterials, 1997
- Biodegradable Plastic Made from Soybean Products. 1. Effect of Preparation and Processing on Mechanical Properties and Water AbsorptionIndustrial & Engineering Chemistry Research, 1994
- Processing and characterization of absorbable polylactide polymers for use in surgical implantsJournal of Applied Biomaterials, 1994
- Evaluation of absorbable poly(ortho esters) for use in surgical implantsJournal of Applied Biomaterials, 1994
- Protein‐Protein Interactions in the Extrusion of Soya at Various Temperatures and Moisture ContentsJournal of Food Science, 1993
- Modification of food proteins by covalent crosslinkingTrends in Food Science & Technology, 1991
- Extrusion behaviour of different soya isolates and the effect of particle sizeInternational Journal of Food Science & Technology, 1986