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Ultra‐Strong, Highly Transparent, and Degradable Calcium Alginate Bioplastic
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Scientists made a new plastic from seaweed extract that's surprisingly strong, clear like glass, and actually breaks down in the environment, unlike regular plastic, which sticks around for centuries and breaks into microplastics that end up in our food and bodies. This seaweed-based plastic could one day replace things like food packaging or plastic wrap without leaving behind the pollution or health concerns tied to conventional plastics.
ABSTRACT Derived from non‐renewable petroleum resources, conventional plastics are ubiquitous synthetic polymers that have provided immense societal convenience. However, their resistance to degradation has led to a global environmental crisis, with persistent waste accumulating in terrestrial and marine ecosystems and microplastics infiltrating the food chain. This urgent challenge necessitates the development of sustainable and biodegradable alternatives. A major obstacle is that most currently available bioplastics lack the mechanical robustness and optical transparency required for widespread practical applications. In this work, we present a straightforward and efficient method for fabricating high‐performance bioplastic films from alginate, a natural polysaccharide extracted from brown algae. Our process involves dissolving sodium alginate (SA) to form a homogeneous solution, casting it into a film, and subsequently crosslinking it with calcium ions (Ca 2+ ). Under the dry testing conditions used in this study, the resulting calcium alginate (CA) films exhibited a maximum tensile strength of 239.7 MPa and a visible‐light transmittance of approximately 84%–85% at 550 nm. In addition, the material exhibited excellent biocompatibility and underwent substantial degradation under the environmental conditions examined. These findings demonstrate the potential of CA films as transparent, mechanically robust, and sustainable bioplastic materials, offering a promising alternative to conventional petroleum‐derived plastics.
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Ultralight sponge made from sodium alginate with processability and stability for efficient removal of microplastics
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Researchers developed an ultralight sponge made from sodium alginate, a natural seaweed-derived material, that can efficiently capture and remove microplastics from water. The sponge demonstrated high water absorption and strong microplastic removal capabilities while remaining stable and reusable. The study suggests this low-cost, biodegradable material could be a practical solution for filtering microplastic pollution from marine environments.
Thermally Processable, Transparent, Mechanically Tunable and Robust Bioplastics From Wastepaper
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Scientists found a simple way to turn old paper waste into a strong, clear, plastic-like material by breaking down and reshaping its cellulose fibers under heat and pressure. Unlike regular plastic, this new material is biodegradable and doesn't rely on petroleum, meaning it could eventually help cut down on the plastic pollution and microplastics that end up in our food, water, and bodies. While it's still early-stage research, it points toward a promising, more sustainable alternative for everyday packaging.
Multifunctional Alginate Composite Fibers Based on Pre-Crosslinked Spinning Solutions
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Scientists have created a new type of fiber made from seaweed extract (alginate) and titanium dioxide nanoparticles that's strong, biodegradable, and could replace plastic-based textiles—offering a potential way to cut down on microplastic pollution. As a bonus, these fibers can break down formaldehyde (a chemical found in some fabrics and furniture that can irritate lungs and eyes) and resist catching fire, making them promising for healthier, safer textiles in homes.
High-strength alginate fibers wet-spun from pre-crosslinked sodium alginate solutions
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Scientists developed a new method for making stronger alginate fibers from seaweed-derived materials as a biodegradable alternative to petroleum-based synthetic fibers. The resulting fibers had breaking strength of 474 MPa, exceeding most plant-based fibers without additives. Replacing synthetic fibers like polyester with biodegradable alternatives is important because synthetic textiles are one of the largest sources of microplastic pollution through washing and wear.
Sifat Fisik dan Mekanik Bioplastik Komposit dari Alginat dan Karagenan
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Researchers developed a bioplastic composite from alginate and carrageenan — both derived from seaweed — and tested how varying carrageenan content affected its physical and mechanical properties. Higher carrageenan content improved strength and flexibility. Seaweed-based bioplastics could replace conventional plastics in packaging applications while reducing plastic pollution.
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