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Zhang, Chaofan; Wang, Chengyu; Cao, Guoliang; Wang, Dawei; Ho, Shih-Hsin
Journal of hazardous materials, 04/2020, Letnik: 388Journal Article
Display omitted •Bioplastics fabrication from hazardous high-salt microalgal residues was successfully achieved.•Spirulina sp. residues served as excellent raw bioplastic materials were investigated.•The inorganic salts acted as the filler and the cross linker were comprehensively discussed.•Effect of inorganic salts on enhancing the tensile strength and flexibility was fully explored. Plastic products have become a major contaminant in environmental ecology due to their recalcitrant biodegradation, poor management and risky disposal. Therefore, much research attention has been paid to developing the biodegradable bio-based plastics. However, many of the substitute bioplastics derived from agricultural materials may present a potential threat to food security and eco-systems. Herein, we propose a sustainable, eco-friendly and simple procedure to convert the hazardous high-salt contained microalgal residues into bioplastic film. With 35 % poly (vinyl alcohol) (PVA) assistance, the composite bioplastic films achieved 22 MPa tensile strength under alkali condition and 77 % elongation at break under acidic condition. The average maximum contact angle of 94.4° confirmed a desirable water resistance potential. The synthesis mechanism demonstrated that the inorganic salts existed in microalgal residues could act as the filler in shape of sheets under alkali condition or as the cross linker under acidic condition, significantly enhancing the practical feasibility. This work demonstrates a promising biodegradable bioplastics formed from sustainable eco-friendly waste reutilization process, providing a new insight for fundamentally reducing the plastics pollution.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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