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Development of technology for producing biodegradable hybrid composites based on polyethylene, starch, and monoglycerides

https://doi.org/10.32362/2410-6593-2020-15-6-44-55

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Abstract

Objectives. This work aimed to develop technology to produce biodegradable hybrid composite (BHC) films based on low-density polyethylene (LDPE) 115030-070 and thermoplastic starches (TPS) of various origins (corn, pea, and rice), with distilled monoglycerides as the plasticizer. The properties of the produced BHC films were studied and the optimal native starch : glycerol : monoglycerides ratio is proposed.

Methods. TPS and BHC films based on this material were produced from different types of native starches in laboratory extruders (Brabender and MashPlast, Russia), and the extruded melts were subjected to ultrasonic vibrations. The structure and appearance of the BHC films were studied using scanning electron microscopy and rheology. Their biodegradability was assessed by immersing them in biocompost for three months. To evaluate the mechanical performance of the BHC films produced with and without ultrasound, the changes in tensile stress and elongation at break were determined during the biodegradation process.

Results. The BHC films had a homogeneous structure, except small agglomerates (non-melted starch grains), which did not reduce their quality. The films with monoglycerides had high tensile strength, which was comparable with low-density polyethylene. After removing samples of the BHC films from the biocompost, their tensile strength decreased by 20%, which shows their biodegradability.

Conclusions. The produced biodegradable composite films and the technology used to produce them will be applicable for the packaging industry to reduce environmental impact.

About the Authors

I. Yu. Vasilyev
Moscow Polytechnic University
Russian Federation

Ilya Yu. Vasilyev, Lecturer, Department of Innovative Materials for the Print Media Industry, Institute of Print Media and Information Technologies

38, Bolshaya Semenovskaya ul., Moscow, 127008



V. V. Ananyev
Moscow Polytechnic University
Russian Federation

Vladimir V. Ananyev, Cand. of Sci. (Engineering), Professor, Department of Innovative Materials for the Print Media Industry, Institute of Print Media and Information Technologies

38, Bolshaya Semenovskaya ul., Moscow, 127008



V. V. Kolpakova
All-Russian Research Institute of Starch Products
Russian Federation

Valentina V. Kolpakova, Dr. of Sci.(Engineering), Professor, Head of the Department

11, Nekrasova ul., Kraskovo, Moscow oblast, 140051



A. S. Sardzhveladze
All-Russian Research Institute of Starch Products
Russian Federation

Aslan S. Sardzhveladze, Senior Researcher

11, Nekrasova ul., Kraskovo, Moscow oblast, 140051



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Supplementary files

1. Schematic of the twin-screw extruder for obtaining composite granules (see the article)
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2. This is to certify that the paper titled Development of technology for producing biodegradable hybrid composites based on polyethylene, starch, and monoglycerides commissioned to us by Ilya Yu. Vasilyev, Vladimir V. Ananyev, Valentina V. Kolpakova, Aslan S. Sardzhveladze has been edited for English language and spelling by Enago, an editing brand of Crimson Interactive Inc.
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  • Research has been conducted to produce films from biologically degradable hybrid composite material based on LDPE and thermoplastic starch of various origins, and the use of distilled monoglycerides as the plasticizer component.
  • The use of ultrasonic vibrations improves the mechanical properties of the films and accelerates their biodegradation.

For citation:


Vasilyev I.Yu., Ananyev V.V., Kolpakova V.V., Sardzhveladze A.S. Development of technology for producing biodegradable hybrid composites based on polyethylene, starch, and monoglycerides. Fine Chemical Technologies. 2020;15(6):44-55. https://doi.org/10.32362/2410-6593-2020-15-6-44-55

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