Study of the Properties of Thermoset Materials Derived from Epoxidized Soybean Oil and Protein Fillers
- First Online:
Novel bio-based thermoset formulations were prepared by using epoxidized soybean oil (ESBO), nadic methyl anhydride as a hardener and with different types of proteins as fillers. In the first part of the study, the effect of the protein-type (wheat gluten, soy protein, casein and ovalbumin) on cured ESBO materials was investigated. Thermal and mechanical properties were characterized by flexural tests, Shore D hardness, Charpy impact tests, Vicat softening temperature and heat deflection temperature. In addition, a study of the morphology of fractured surfaces by scanning electron microscopy was carried out. In general, the addition of protein-based fillers improved the mechanical and thermal properties. It was found that the highest increase of thermal and mechanical properties was achieved by ovalbumin. In the second part of the work, the effect of the total amount of ovalbumin filler was studied. Bio-based thermoset materials from ESBO and 15 wt % ovalbumin improved flexural modulus more than 150 % when compared to the unfilled material. Similar evolution was observed for other mechanical properties. Moreover, the brittleness of this composition was the minimum from the studied systems. A direct relationship between energy absorption capacity and morphologies of the failure surface was evidenced by SEM.
KeywordsPolymers Oilseeds Seed proteins
- 5.Chakrapani S, Crivello JV (1998) Synthesis and photoinitiated cationic polymerization of epoxidized castor oil and its derivatives. J Macromol Sci-Pure Appl Chem A35:1–20Google Scholar
- 11.Espinosa-Perez J, Wiesenborn DP, Tostenson K, Ulven CA, Tatlari M (2007) Preparation and partial characterization of canola-based epoxy resins for bio-based plastic composites. ASABE Annual International Meeting, 076079, Minneapolis, MNGoogle Scholar
- 23.Samper MD, Fombuena V, Boronat T, García-Sanoguera D, Balart R (2012) Thermal and mechanical characterization of epoxy resins (ELO and ESO) cured with anhydrides. J Am Oil Chem Soc 89(8):1521–1528Google Scholar
- 24.Sharma S (2008) Fabrication and characterization of polymer blends and composites derived from biopolymers. Philosophy Materials Science and Engineering. Graduate School of Clemson University, ClemsonGoogle Scholar