Processing and properties of phthalic anhydride modified soy protein/glycerol plasticized soy protein composite films

Abstract

Phthalic anhydride modified soy protein (PAS)/glycerol plasticized soy protein (GPS) composite films were fabricated by using extrusion and compression-molding. Modified with phthalic anhydride, the soy protein lost its thermoplastic ability and was used as a filler to reinforce the GPS matrix. Fourier transform infrared spectra, optical transmittance, scanning electron microscope, mechanical tests, water resistance tests, as well as thermo-gravimetric analysis were carried out to investigate the structure and properties of PAS and the plastic composites. The similar chemical structure of PAS and GPS led to compatibility of the two components resulting in high transparency and enhanced tensile properties of the composites. The water resistance of GPS was also improved by the incorporation of PAS.

Poly(butylene succinate -co- butylene adipate)/cellulose nanocrystal composites modified with phthalic anhydride

“…Actually, PA was added into the matrices of polypropylene/waste tire dust (PP/WTD) matrices reinforced by kenaf (KNF) and enhanced the interfacial adhesion between PP/WTD matrices and KNF, which resulted in higher tensile strength and modulus of the composites (Pang, & Ismail, 2014). Similar works were also tried in soy protein (Guo, et al, 2015), high density polyethylene/wood fiber composites (Hanif, Supri, & Zainuddin, 2015) and soy protein isolate/kapok husk biofilm (Sellivam, et al, 2015).…”

“…Therefore, CNCs have the great tendency to aggregate with each other rather than to disperse uniformly in polymeric matrix. In order to modify the surface of CNC, several chemical methods, such as grafting reaction with aliphatic long-chain molecules (Siqueira, Bras, & Dufresne, 2009), (2,2,6,6-Tetramethylpiperidine-1-oxyl)-mediated oxidation (Habibi, Lucia, & Rojas, 2010;Montanari, Roumani, Heux, & Vignon, 2005), peptidic coupling reaction (Tingaut, Zimmermann, & Sebe, 2012), surface-initiated single-electron ransfer living radical polymerization (Gupta, & Khandekar, 2003) or atom-transfer radical polymerization with poly( N -isopropylacrylamide) chains (Zoppe, Venditti, & Rojas, 2012) were tried by other researchers. These modifications successfully modified CNC and enlarged its application.…”

Physical, Chemical and Biochemical Modifications of Protein-Based Films and Coatings: An Extensive Review

“…However, the denaturation temperature strongly depends on the protein concentration and the solvent properties [ 70 ]. For example, in an extrusion process the soy protein denaturation temperature was found to be 120 °C [ 71 ].…”

The Potential of Proteins for Producing Food Packaging Materials: A Review

“…75 The properties of extruded soy protein isolate films have been also improved by the addition of montmorillonite 76,77 or phthalic anhydride modified soy protein. 78 In the latter work, modified soy protein lost its thermoplastic ability and was incorporated as a filler to reinforce the protein matrix.…”