Ionic-liquid-processed keratin-based biocomposite films with cellulose and chitin for sustainable dye removal

被引:0
作者
Polesca, Cariny [1 ,2 ]
Passos, Helena [1 ,3 ,4 ]
Nakasu, Pedro Y. S. [2 ]
Coutinho, Joao A. P. [1 ]
Freire, Mara G. [1 ]
Hallett, Jason P. [2 ]
机构
[1] Univ Aveiro, CICECO Aveiro Inst Mat, Dept Chem, P-3810193 Aveiro, Portugal
[2] Imperial Coll London, Dept Chem Engn, South Kensington Campus, London SW7 2AZ, England
[3] Univ Porto, Fac Engn, LSRE, LCM, P-4200465 Porto, Portugal
[4] Univ Porto, Fac Engn, ALiCE Associate Lab Chem Engn, P-4200465 Porto, Portugal
来源
RSC SUSTAINABILITY | 2024年 / 2卷 / 08期
关键词
WOOL KERATIN; MICROCRYSTALLINE CELLULOSE; DISSOLUTION; DEGRADATION; ADSORPTION; GLYCEROL; FEATHERS; BONDS;
D O I
10.1039/d4su00179f
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Poultry is a widely consumed meat worldwide; however, its industrial processing generates a significant amount of feather waste. Since the major component of chicken feathers is keratin (90 wt%), this study focused on using acetate-based ionic liquids (ILs) to fully dissolve chicken feathers and recover keratin, using a sustainable and cost-effective approach, ultimately allowing waste valorisation. The recovered keratin was processed into films, either pure or blended with cellulose and alpha-chitin, aiming to develop a structural polymer biocomposite with improved mechanical properties. Experimental parameters were evaluated using different blend ratios, altering the pH, and adding glycerol as a plasticiser. Physico-chemical analysis revealed that all films exhibited hydrophilic behaviour and are stable up to 160 degrees C. Furthermore, the tensile strength of the keratin-based films significantly increased by adding chitin (achieving up to 66 MPa). Considering the growing significance of biopolymer-based films in wastewater treatment applications, the keratin-based films were evaluated as adsorbents for dye removal. Reactive Blue 4 (RB4) was used as a model dye, and the adsorption kinetics and isotherms were investigated. Between the studied films, the maximum adsorption capacity (55.7 mg g-1) was obtained for the keratin film, emphasising the potential of this biomaterial in wastewater treatment. Abundant biopolymers derived from wastes were used to prepare bio-based films, resulting in notable enhancements in their properties and promising potential as effective adsorbent materials.
引用
收藏
页码:2239 / 2248
页数:10
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