Poly(methyl methacrylate)/soy protein green composites as gas barrier materials

Abstract

Poly(methyl methacrylate)/soy protein (PMMA/SP) composites were prepared by emulsion polymerization method using potassium persulphate (KPS) as the radical initiator. The interaction of soy protein with PMMA was evidenced by Fourier transformed infrared (FTIR) spectroscopy. The structure of PMMA/SP composites was investigated by X-ray diffraction (XRD) study and scanning electron microscopy (SEM). The thermal properties of soy protein and PMMA/SP composites were compared with soy protein and virgin PMMA sample. PMMA/SP composites were found to be flame retardant materials from the measurement of limiting oxygen index (LOI) of samples. The oxygen permeability of PMMA/SP composites was substantially decreased as compared to virgin PMMA.

Effect of oxidization and chitosan on the surface activity of soy protein isolate

“…Soy protein is globular, reactive and often water soluble as compared to helical or planar, non-reactive and water resistant synthetic polymers (Kisku, & Swain, 2012). Soy protein consists of various polar and reactive amino acids such as cysteine, arginine, lysine and histidine which can be used for crosslinking it and improving the tensile and thermal properties (Chabba, Matthews, & Netravali, 2005).…”

Nano silicon carbide embodied soy protein bionanocomposites

“…It has the capability to be blended with different inorganic and organic nanoparticles . On blending with bio‐based cellulose and purely synthetic poly(methyl methacrylate), soy protein produced high quality composite materials . Combination of sodium montmorillonite (MMT) and soy protein was found to generate a membrane with high mechanical properties .…”

Proteins as Promising Biobased Building Blocks for Preparing Functional Hybrid Protein/Synthetic Polymer Nanoparticles

“…Moreover, properties comparable to existent commercial products were obtained in some cases. 67,102,126 The main synthesis route for obtaining these protein/ synthetic polymer latexes involves the emulsion polymerization in the absence of emulsifier, 24,67,79,99,124 which paves the way for its industrial implementation without significant technological upgrades. The efforts made have allowed the achievement of producing high solids hybrid latexes with elevated protein content 82,83,99,132,153 and compatibility, 82,132 highly desirable for an efficient exploitation of this sustainable resource.…”

“…67,72,84 In this scenario, highly compatibilized hybrid materials showed superior properties than the simple constituents' addition, demonstrating a synergetic contribution of both components due to the intimate contact between phases. Some of these synergetic improvements observed in the applications of protein-based hybrid NPs were partial biodegradability, 66,67,72,84,124,132 thermal stability, 67 film formation with low requirement of formulation agents (better NPs coalescence), 2 4 , 1 3 1 solvent resistance, 2 4 water resistance, 72,82,102,103,125 and mechanical strength 103,125,126,153 among others.…”

“…Also, the synthesis of waterborne soy protein-based NPs with an orientation to industrial applications was investigated employing scalable methods such as EP and MEP. Kisku and Swain 124 studied the synthesis of soy protein/PMMA latexes by EF-EP of MMA employing a low content of soy protein (PC ranging from 1 to 5% as emulsifier) and KPS/ammonium ferrous sulfate as radical initiator. The materials obtained after latexes precipitation and drying showed a uniformed distribution of soy protein.…”