Characterization of Microalgae Biomass-Based Composites Obtained through Rotational Molding
Sara Díaz1, Francisco Romero1, Luis Suárez1
1Departamento de Ingeniería de Procesos, Universidad de Las Palmas de Gran Canaria, Edificio de Fabricación Integrada, Parque Científico-Tecnológico de la ULPGC, Campus Universitario de Tafira Baja, 35017 Las Palmas de Gran Canaria, Las Palmas, Spain.
Polymers
|July 13, 2024
Summary
This study explores using microalgae like Spirulina in polyethylene biocomposites to reduce plastic waste. Unwashed microalgae enhanced composite properties and improved resistance to thermo-oxidation.
Area of Science:
- Materials Science
- Polymer Science
- Biotechnology
Background:
- Excessive plastic use causes environmental damage.
- Biocomposites offer an eco-friendly alternative.
- Microalgae are a sustainable source for biocomposite production.
Purpose of the Study:
- To evaluate Spirulina (washed and unwashed) as a filler in polyethylene (PE) biocomposites.
- To assess the impact of biomass content on composite properties.
- To investigate the potential for reducing virgin plastic use and improving material performance.
Main Methods:
- Biocomposites were fabricated using rotomolding with varying Spirulina biomass percentages (up to 15%).
- Mechanical, thermal, and water uptake properties were analyzed.
- Thermo-oxidative resistance was assessed via oxidation induction time measurements.
Main Results:
- Composites with up to 15% biomass were successfully produced, a high ratio for rotomolding.
- Unwashed Spirulina at higher loadings yielded superior properties compared to washed biomass.
- Biomass addition significantly increased the oxidation induction time, enhancing thermo-oxidative resistance.
Conclusions:
- Microalgae, particularly unwashed Spirulina, can be effectively incorporated into polyethylene biocomposites.
- This approach reduces reliance on virgin plastics and improves material durability.
- Utilizing unwashed biomass offers economic and environmental advantages, including reduced water consumption and costs.
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