Miscibility study of thermoplastic starch/polylactic acid blends: Thermal and superficial properties

In this work, the miscibility of blends of thermoplastic Achira Starch (AS) and polylactic acid (PLA) was evaluated, assisted by Pluronic® F127 an amphiphilic triblock copolymer that acts as a surfactant and promotes the reduction of surface tension among AS and PLA in solution by emulsion stabiliza...

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Bibliographic Details
Published in:Carbohydrate polymers 2022-10, Vol.293, p.119744-119744, Article 119744
Main Authors: Fonseca-García, Abril, Osorio, Brayan Hernández, Aguirre-Loredo, Rocio Yaneli, Calambas, Heidy Lorena, Caicedo, Carolina
Format: Article
Language:English
Subjects:
Achira starch
calorimetry
composite polymers
contact angle
Emulsion
emulsions
Fourier transform infrared spectroscopy
glycerol
PLA
plasticizers
Pluronic® F127
polylactic acid
Polymeric blend films
solvents
starch
surface tension
surfactants
thermogravimetry
thermoplastics
wettability
X-ray diffraction
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Summary:In this work, the miscibility of blends of thermoplastic Achira Starch (AS) and polylactic acid (PLA) was evaluated, assisted by Pluronic® F127 an amphiphilic triblock copolymer that acts as a surfactant and promotes the reduction of surface tension among AS and PLA in solution by emulsion stabilization. Different formulations of AS/PLA blends were obtained at 75:25, 50:50, and 25:75 containing 0 %, 4 %, and 8 % of Pluronic® F127, and glycerol was used as a plasticizer. Solvent casting was the method used to obtain blended polymeric films, which were characterized by Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), Thermogravimetric Analysis (TGA), differential scanning calorimetry (DSC) and wettability by contact angle measurements. The results demonstrate that miscibility of PLA in AS or vice versa was achieved. The stability of emulsion and posterior drying of the different formulations allows the production of films for packaging, pharmaceutical, or biomedical applications. [Display omitted]
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2022.119744