Properties of compression-molded, acetylated soy protein films

Foulk, Jonn A.; Bunn, J. M.

doi:10.1016/s0926-6690(00)00084-4

Cited by 50 publications

(42 citation statements)

References 15 publications

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“…The protein structure was considered a random coil with an absorption band from 1655 to 1658 cm À1 . 22 All of the S-T infrared scans displayed a band at 1658 cm À1 , which indicated this type of structure. The broad peaks for S-30T and S-40T shifted to significantly higher wave numbers and changed into relatively sharp peaks.…”

Section: Resultsmentioning

confidence: 87%

Structure and mechanical properties of soy protein materials plasticized by Thiodiglycol

Kumar

Wang

Zhang

2008

J of Applied Polymer Sci

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Thiodiglycol (TDG) is a relatively nontoxic compound from organic wastes. By using TDG as a plasticizer with weights from 2.5 to 40%, we prepared soy protein isolate (SPI) films by a compression-molding technique at 140 C and 15 MPa. The TDG-plasticized films (SPI-TDG films) were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, dynamic mechanical thermal analysis, thermogravimetric analysis, optical transmittance, and water uptake experiments. The SPI-TDG film plasticized with 25% TDG exhibited good mechanical properties, such as a tensile strength and modulus of 20.3 and 582 MPa, respectively, whereas the SPI-glycerol film with 25% glycerol had a tensile strength and modulus of 16.2 and 436 MPa, respectively. The results from the thermogravimetric analysis and water uptake experiments indicated that the thermal stability and water resistance of the TDG-plasticized SPI materials were higher than that of the glycerol-plasticized one. The improvements in the mechanical properties, water resistance, and thermal stability of the SPI-TDG films could be attributed to the strong intermolecular hydrogen bonding between soy protein and TDG and the presence of fewer hydroxyl groups in TDG, as compared structurally with glycerol. This study provided a new plasticizer for the preparation of soy protein materials.

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Section: Resultsmentioning

confidence: 87%

Structure and mechanical properties of soy protein materials plasticized by Thiodiglycol

Kumar

Wang

Zhang

2008

J of Applied Polymer Sci

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“…Hence, the properties of SPI films have been modified by different technologies, e.g. processing methods improvement [12][13][14], natural materials blending [15], enzyme treatment [16], chemical treatment [6], etc.…”

Section: Introductionmentioning

confidence: 99%

Property enhancement of soy protein isolate-based films by introducing POSS

Xia

Zhang

Shi

et al. 2016

International Journal of Biological Macromolecules

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“…[1][2][3][4] However, soy protein plastics are very rigid and brittle and have water sensitivity. Therefore, many chemical and physical modifications have been explored to improve the processibility, mechanical properties, and water resistance of soy protein-based materials, such as acetylation, 5 esterification, 6 and denaturation 7 of soy protein, guanidine hydrochloride 8 and sodium dodecyl sulfate modification, 9 incorporation of a filler, 10,11 and blending with other biodegradable polymers. [12][13][14] Blending is an important method in polymer manufacture and has received increasing attention because of strong economic and academic incentives for the development of polymeric materials.…”

Section: Introductionmentioning

confidence: 99%

Morphology and properties of soy protein plastics modified with chitin

Zheng

Tan

Zhan

et al. 2003

J of Applied Polymer Sci

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A series of bioplastics from isolated soy protein (SPI) and chitin (CH) was prepared with glycerol as a plasticizer by blending and compression molding. Their morphology and properties were investigated by wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), dynamical mechanical thermal analysis (DMTA), scanning electron microscopy (SEM), and tensile and water-absorption tests. The added CH as a filler cannot strongly interact with SPI molecules and, hence, this results in phase separation in blends. However, the rigid nature of the CH molecules enhanced the tensile strength and Young's modulus, but decreased the breaking elongation of the materials. When the CH content was higher than 10 wt %, the water absorption of the blends were obviously lower than that of the sheets without CH, resulting from the formation of a CH framework in the blends. Both soy protein and CH exhibit good biodegradability, biocompatibility, and bioactivity, and their composites may become a promising biomaterial.

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Properties of compression-molded, acetylated soy protein films

Cited by 50 publications

References 15 publications

Structure and mechanical properties of soy protein materials plasticized by Thiodiglycol

Structure and mechanical properties of soy protein materials plasticized by Thiodiglycol

Property enhancement of soy protein isolate-based films by introducing POSS

Morphology and properties of soy protein plastics modified with chitin

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