The Influence of the Combined Impact of Shear Stress and Cavitation on the Structure and Properties of Сhitosan-BaSO4 Composite

• Published in: Journal of polymers and the environment Vol. 31; no. 12; pp. 5326 - 5337
• Main Authors: Lipatova, I. M., Yusova, A. A., Makarova, L. I.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-12-2023; Springer Nature B.V
• Subjects: Atomic force microscopy; Barite; Barium; Barium sulfate; Cavitation; Chemistry; Chemistry and Materials Science; Chitosan; Composite materials; Copper; Elongation; Environmental Chemistry; Environmental Engineering/Biotechnology; Fillers; Industrial Chemistry/Chemical Engineering; Infrared spectroscopy; Materials Science; Moisture resistance; Original Paper; Permeability; Polymer Sciences; Rotors; Shear stress; Sorption; Stators; X-ray diffraction; Chitosan; Composite films properties; Microstructure; Inorganic submicron particles; Mechanoactivation
• ISSN: 1566-2543; 1572-8919
• DOI: 10.1007/s10924-023-02952-5

This work aims to introduce a high-performance, environmentally friendly process for the production of composites based on chitosan and submicron inorganic particles using the example of barium sulfate (ВaSO
4
) as a filler. The process is based on the direct incorporation of commercial BaSO
4
into a chitosan solution and short-term mechanical activation of dispersion in a rotor-stator device under optimized processing conditions. Composite films obtained from mechanically activated dispersions with a filler content of 0–20% (w/w) were characterized using optical, AFM, and SEM microscopy, X-ray diffraction, FT-IR spectroscopy, and tensile and moisture permeability testing data. With an increase in the filler content, the moisture resistance of the films increases. The maximum increase in strength and elongation (of 20 and 110%, respectively) is achieved with a filler content of 10%. It was found that the introduction of filler increases the sorption capacity of the films towards Cu
2+
ions by 35% and the initial sorption rate by three times. The developed method can be recommended for large-scale production of chitosan-based composite materials.
Graphical Abstract