Related Experiment Video
Updated: Oct 20, 2025
06:51
Film Extrusion of Crambe abyssinica/Wheat Gluten Blends
Published on: January 17, 2017
10.2K
Improving Mechanical Properties of PLA/Starch Blends Using Masterbatch Containing Vegetable Oil Based Active
Bianka Nagy1, Norbert Miskolczi1, Zoltán Eller1
1Research Centre of Biochemical, Environmental and Chemical Engineering, MOL Department of Hydrocarbon & Coal Processing, Faculty of Engineering, University of Pannonia, H-8200 Veszprém, Hungary.
Polymers
|September 10, 2021
Summary
Vegetable oil additives enhance the compatibility of polylactic acid (PLA) and starch blends. These additives improved impact strength and other properties, especially in blends with higher starch content.
Area of Science:
- Polymer Science
- Materials Science
- Biocomposites
Background:
- Polylactic acid (PLA) and starch are biodegradable polymers with potential applications.
- Improving the compatibility between PLA and starch is crucial for developing advanced biocomposites.
- Vegetable oil-based additives offer a sustainable approach to modify polymer properties.
Purpose of the Study:
- To enhance the compatibility of polylactic acid (PLA) and starch blends using vegetable oil-based additives.
- To evaluate the effect of these additives on the mechanical properties of PLA/starch composites.
- To investigate the role of different vegetable oils and compatibilizers.
Main Methods:
- Preparation of PLA/starch blends with varying compositions (e.g., 70/30, 60/40, 50% starch).
- Incorporation of vegetable oil-based additives and a maleic anhydride-grafted PLA (PLA-g-MA) compatibilizer.
- Mechanical testing including tensile tests, Charpy impact strength, and elongation at break (conditioned and unconditioned).
- Scanning Electron Microscopy (SEM) for microstructural analysis.
Main Results:
- Charpy impact strength improved for 70/30 and 60/40 PLA/starch blends with vegetable oil additives.
- No significant improvement in impact strength was observed with PLA-g-MA.
- For the 50% starch sample, sunflower oil improved flexural modulus, while rapeseed oil enhanced impact strength and elongation at break.
- SEM images confirmed improved interfacial adhesion and compatibility between PLA and starch.
Conclusions:
- Vegetable oil-based additives are effective in enhancing the compatibility and mechanical properties of PLA/starch blends.
- Rapeseed and sunflower oils show specific benefits for different mechanical properties, particularly in high-starch content blends.
- These findings suggest a viable route for developing improved, sustainable biocomposites from PLA and starch.
Related Concept Videos
01:05Bioavailability Enhancement: Drug Stability Enhancement and GI Retention
23
Body:Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
23
01:30Superplasticizers
131
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
131
01:31Plasticizers
142
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
142