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http://dx.doi.org/10.17702/jai.2011.12.2.073

Characteristics of Soybean Protein Resin Modified by Plasticizers and Cross-Linking Agents  

Choi, Han Na (FTIT, Department of Advanced Organic Materials & Textile System Engineering, Chungnam National University)
Lee, Tae Sang (FTIT, Department of Advanced Organic Materials & Textile System Engineering, Chungnam National University)
Yang, Ji Woo (FTIT, Department of Advanced Organic Materials & Textile System Engineering, Chungnam National University)
Lee, Seung Goo (FTIT, Department of Advanced Organic Materials & Textile System Engineering, Chungnam National University)
Publication Information
Journal of Adhesion and Interface / v.12, no.2, 2011 , pp. 73-80 More about this Journal
Abstract
In order to develop the environmental-friendly new materials based on soybean protein which is plantable macromolecule, thermal characteristics of the soybean protein resin (SPI) modified by plasticizers (1,3-propandiol, glycerol) and cross linking agents (glutaraldehyde, epichlorohydrin, glyoxal, urea) were analyzed by TGA. Mechanical properties of modified SPI were investigated and fracture was observed by SEM. As the result, flexibility of SPI film was increased by adding plasticizers; 1,3-propandiol and glycerol. Plasticization effect of glycerol was relatively greater than that of 1,3-propandiol. With the application of crosslinking agents (glycerol, epichlorohydrin and glyoxal), strength and thermal stability of SPI increased with their content. On the other hand, in case of addition of urea, thermal stability of SPI decreased and its strength was reduced because cross-linking between urea and SPI was somewhat difficult. Fracture surfaces and domain interfaces of the modified SPI resins were observed with SEM.
Keywords
soy protein; thermal property; plasticizer; cross linking agent; biocomposite; biopolymers;
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