Polyvinyl Alcohol: Recent Advances and Applications in Sustainable Materials

Polymer-Plastics Technology and Materials, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 32

Published: Dec. 30, 2024

Polyvinyl alcohol (PVA) is a synthetic biopolymer widely recognized for its biodegradability, biocompatibility, and excellent film-forming properties. Recent advancements in PVA-based materials have expanded use diverse fields, including packaging, biomedicine, wastewater treatment. This review offers comprehensive analysis of the latest innovations PVA applications, emphasizing their role as sustainable material, particularly through development nanocomposites. The addition nanoparticles, cross-linking agents, combinations has significantly enhanced mechanical strength, antibacterial properties, UV-blocking capacity PVA, making it well-suited advanced packaging biomedical applications. Cross-linking improves water resistance durability while combining with biopolymers such starch chitosan enhances biodegradability. highlights structural, mechanical, optical, electrical properties

Language: Английский

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Applications of the Microalgae Chlamydomonas and Its Bacterial Consortia in Detoxification and Bioproduction

Life, Journal Year: 2024, Volume and Issue: 14(8), P. 940 - 940

Published: July 27, 2024

The wide metabolic diversity of microalgae, their fast growth rates, and low-cost production make these organisms highly promising resources for a variety biotechnological applications, addressing critical needs in industry, agriculture, medicine. use microalgae consortia with bacteria is proving valuable several areas biotechnology, including the treatment various types wastewater, biofertilizers, extraction products from biomass. monoculture microalga Chlamydomonas has been prominent research model many years extensively used study photosynthesis, sulphur phosphorus metabolism, nitrogen respiration, flagellar synthesis, among others. Recent increasingly recognised potential Chlamydomonas-bacteria as tool applications. detoxification wastewater using its bacterial offers significant sustainable reduction contaminants, while facilitating resource recovery valorisation microalgal biofertilizers can offer benefits, such increasing crop yields, protecting crops, maintaining soil fertility stability, contributing to CO2 mitigation, agricultural practises. Chlamydomonas-bacterial play an important role high-value products, particularly biofuels enhancement H2 production. This review aims provide comprehensive understanding identify current applications propose new development directions maximise potential.

Language: Английский

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Alginate biopolymer viscoelasticity from sol to gel: Linear and nonlinear rheology, and Brownian motion of tracer particles embedded in the polymer network

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(1)

Published: Jan. 1, 2025

The linear and nonlinear rheological behavior of alginate/Ca2+ gels made through slow solubilization CaCO3 using gluconic acid-δ-lactone was studied. Rheological modulus follows a power law at the critical point; exponents (n = 0.60–0.65) decrease slightly, increasing Ca2+ ions. These values agree with those reported in literature similar mannuronic/guluronic residue ratios total polymer concentration. strain-hardening matured investigated large amplitude oscillatory shear. Blatz–Sharda–Tschoegl scaling model used to estimate their fractal dimension, whose were 1.23–1.31; dimension is not sensible Lissajous–Bowditch curves show higher nonlinearity constitute fingerprint these gels. geometrical decomposition intracycle strain terms thickening stiffening shows weak formation temporary network junctions during breaking process due convexity curves. Diffusion wave spectroscopy determine mean square displacement microspheres embedded solution exhibiting subdiffusive process, two slopes: m ∼ 0.3 short times 1 long times. diffusive region section decreases as gelation progresses disappears when are formed. Gelation time estimated identify terminal relaxation time, evolution almost same exponential curve for high concentration many multiple egg-box structures. After 24 h gelation, an apparent plateau, indicating important particle confinement.

Language: Английский

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Sustainable biopolymer-based spheres for controlled release of nematodes: from development to the effect in seasonal climate variations

Carbohydrate Polymer Technologies and Applications, Journal Year: 2025, Volume and Issue: unknown, P. 100701 - 100701

Published: Feb. 1, 2025

Language: Английский

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Trehalose-powered membraneless enzymatic fuel cell based on flexible alginate composite hydrogel bioelectrodes

Process Biochemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

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