Related Experiment Video
Updated: Jul 17, 2026
11:08
Cultivation of Green Microalgae in Bubble Column Photobioreactors and an Assay for Neutral Lipids
Published on: January 7, 2019
20.8K
Advancements in microalgal biomass conversion for rubber composite applications
Doaa S Mahmoud1, Salwa H El-Sabbagh2, Sayeda M Abdo3
1Polymers and Pigments Department, National Research Centre, Dokki, Giza, 12622, Egypt. doaa.samiir@yahoo.com.
Scientific Reports
|January 4, 2025
Summary
Microalgal biomass offers a sustainable alternative to petroleum-based carbon black (CB) as a rubber filler. This research shows microalgal biomass can replace up to 50% of CB, improving rubber composite properties.
Area of Science:
- Materials Science
- Polymer Science
- Biotechnology
Background:
- Traditional petroleum-based carbon black (CB) fillers in rubber composites raise environmental concerns due to non-biodegradability and unsustainable production.
- The increasing cost and environmental impact of CB necessitate the exploration of sustainable alternatives for rubber reinforcement.
- Microalgal biomass (MB) presents a promising biodegradable nano filler option with high productivity and efficient resource utilization.
Purpose of the Study:
- To investigate the potential of microalgal biomass (MB) as a partial or complete replacement for carbon black (CB) in rubber composites.
- To evaluate the effect of incorporating MB alongside CB on the properties of Nitrile rubber Acrylonitrile-butadiene rubber (NBR) and Styrene-butadiene rubber (SBR) composites.
- To assess filler-matrix interactions through processability, mechanical properties, Payne effect, and swelling behavior.
Main Methods:
- Microalgal biomass was blended with carbon black at various concentrations for NBR and SBR rubber composites.
- Evaluated processability, mechanical characteristics (e.g., tensile strength, modulus), Payne effect, and swelling properties.
- Compared the performance of dual-filler (MB/CB) composites against traditional CB-filled composites.
Main Results:
- Rubber composites with dual fillers exhibited faster cure times and increased torque.
- Mechanical properties of the rubber composites were significantly improved with the incorporation of microalgal biomass.
- Microalgal biomass effectively reduced the required quantity of carbon black, demonstrating its potential as a partial replacement.
- Up to 50% of carbon black filler could be replaced by microalgal biomass without compromising, and often enhancing, mechanical properties.
Conclusions:
- Microalgal biomass is a viable and effective sustainable filler for rubber composites, capable of partially replacing carbon black.
- The use of microalgal biomass in rubber formulations can lead to improved material performance and reduced reliance on petroleum-based materials.
- This approach offers a pathway to more sustainable rubber production, potentially lowering costs and environmental impact.
Related Concept Videos
01:21Green Algae
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
01:26Microbial Bioremediation of Hydrocarbons
Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...
01:27Production of Alcohol
Continuous fermentation is a key strategy in industrial ethanol production, particularly when efficiency, scalability, and high yields are essential. This approach allows for uninterrupted operation and optimized resource utilization. The primary feedstock, corn starch, undergoes enzymatic hydrolysis facilitated by α-amylase and glucoamylase. These enzymes break down the starch into fermentable sugars such as glucose, which are readily assimilated by fermentative microorganisms.Fermentation...
01:27Bioplastics
Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
01:25Biofuels
The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
01:28Microbial Bioremediation of Plastics
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...