Preparation and characterization of corn starch/soy protein biocomposite film reinforced with graphene and graphene oxide nanoplatelets

Corn starch (CS) and soy protein isolate (SPI), as inexpensive, abundant, and biodegradable materials, can chemically interact well with each other to produce biofilms. However, to overcome some of their physical and mechanical limitations, it is preferred to use their composite form, employing rein...

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Bibliographic Details
Published in:Polymers for advanced technologies 2019-09, Vol.30 (9), p.2301-2312
Main Authors: Mansoori, Elham, Behzad, Tayebeh, Shafieizadegan‐Esfahani, Ahmad Reza
Format: Article
Language:English
Subjects:
Addition polymerization
Biodegradability
biodegradable
Biodegradable materials
Composite materials
Corn
Graphene
graphene platelets
Mechanical properties
nanocomposite
Organic chemistry
Polymer blends
Polymer films
Polymers
protein
Proteins
Reinforcing materials
starch
Thermal stability
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Summary:Corn starch (CS) and soy protein isolate (SPI), as inexpensive, abundant, and biodegradable materials, can chemically interact well with each other to produce biofilms. However, to overcome some of their physical and mechanical limitations, it is preferred to use their composite form, employing reinforcing materials. In this study, initially, graphene (G) and graphene oxide (GO) were synthesized by a green method. Then, to enhance the polymer blend final properties, the effects of adding G and GO in the range of 0.5 to 2 wt% on physical and mechanical properties of starch/protein blend were investigated. The results showed that the presence of 0.5‐wt% G and 2‐wt% GO significantly increased the modulus of starch/protein film from 252 to 578 and 449 MPa, respectively. In addition, the thermal stability of CS/SPI/GO (2 wt%) composite film was 50°C to 60°C more than that of the pure starch/protein film. On the other hand, G‐reinforced composite films tended to decline water diffusion compared with the pure polymer film. In addition, the composite film with 2‐wt% GO content had the lowest oxygen permeation rate (3.48 cm3 μm/m2d kpa) among the other composite films.
ISSN:1042-7147
1099-1581
DOI:10.1002/pat.4657