Preparation of Multicomponent Biocomposites and Characterization of Their Physicochemical and Mechanical Properties

Journal of Composites Science

Lee D. Wilson¹  Yuriy A. Anisimov¹  Duncan E. Cree² 

[1] Department of Chemistry, University of Saskatchewan, Saskatoon, SK S7N 5C9, Canada;Department of Mechanical Engineering, University of Saskatchewan, Saskatoon, SK S7N 5A9, Canada;

关键词: polymer composite;    polyaniline;    chitosan;    thermal analysis;    spectroscopy;    adsorption;    electrical conductivity;    mechanical properties;   

DOI  :  10.3390/jcs4010018

来源: DOAJ

【 摘 要 】

This work focused on a mutual comparison and characterization of the physicochemical properties of three-component polymer composites. Binary polyaniline−chitosan (PANI−CHT) composites were synthesized by in situ polymerization of PANI onto CHT. Ternary composites were prepared by blending with a third component, polyvinyl alcohol (PVA). Composites with variable PANI:CHT (25:75, 50:50 and 75:25) weight ratios were prepared whilst fixing the composition of PVA. The structure and physicochemical properties of the composites were evaluated using thermal analysis (thermogravimetric analysis (TGA), differential scanning calorimetry (DSC)) and spectroscopic methods (infrared (IR), nuclear magnetic resonance (NMR)). The equilibrium and dynamic adsorption properties of composites were evaluated by solvent swelling in water, water vapour adsorption and dye adsorption isotherms. The electrical conductivity was estimated using current−voltage curves. The mechanical properties of the samples were evaluated using dynamic mechanical analysis (DMA) and correlated with the structural parameters of the composites. The adsorption and swelling properties paralleled the change in the electrical and mechanical properties of the materials. In most cases, samples with higher content of chitosan exhibit higher adsorption and mechanical properties, and lower conductivity. Acid-doped samples showed much higher adsorption, swelling, and electrical conductivity than their undoped analogues.

【 授权许可】

Unknown