Fabrication and Characterization of Biodegradable Poly(vinyl alcohol)/Chitosan Blends

Abstract

Poly(vinyl alcohol)/chitosan (PVA/CS) blends were prepared by solution casting method using glutaraldehyde as a cross linking agent. Fourier transform infrared spectroscopy (FTIR) and microhardness technique were employed to study the intermolecular interactions between constituents of polymer blends and mechanical properties respectively. The degradation properties of PVA/CS films were studied by composting method. FTIR spectra of poly(vinyl alcohol) and PVA/CS blends showed some variations in the absorption bands which reflected interactions between the components of blends. The mechanical stiffness of PVA/CS blends was enhanced by chitosan upto 40 % loading and it was found optimum composition for the maximum enhancement of mechanical properties of the blend. The degradation rate of blends was found increased with the increase in chitosan content.

Peanut Shells Cellulose Based Biodegradable Nanocomposites with Polyvinyl Pyrrolidone (PVP) and Polyvinyl Alcohol (PVA)

“…At selected time interval samples (in every week) were taken out from the compost, washed with distilled water and dried it at room temperature for 3–4 h. Based on the initial and final weight before and after degradation the average weight loss percentage for each sample was calculated (Equation ). [ 28 ] $$$$\begin{equation}{\rm{Weight}}\;{\rm{loss}}\;\;\left( \% \right) = \frac{{{w_i} - {w_d}}}{{{w_i}}}\; \times 100\end{equation}$$$$…”

“…At selected time interval samples (in every week) were taken out from the compost, washed with distilled water and dried it at room temperature for 3-4 h. Based on the initial and final weight before and after degradation the average weight loss percentage for each sample was calculated (Equation 5). [28] Weight loss (%) =…”

Fabrication and Characterization of Starch-Based Biodegradable Polymer with Polyvinyl Alcohol

“…Lucas et al mentioned that in the process of biodegradation, the resistance and durability of polymeric materials are made weak by the action of microorganisms or/and environmental abiotic factors. Another suitable possible reason was given by Bonhomme et al and Leja et al according to them, the growth of microorganisms adhering to the polymer surface can provoke the formation of cracks, increase the size of pores and others defects, that may lead to the disintegration of a material into small fragments [45].…”

Mechanical Amorphization of Chitosan with Different Molecular Weights

“…The properties of chitosan can be significantly altered by subjecting it to physicochemical modification such as mechanochemical disordering and amorphization [ 17 , 18 , 19 ], plasma treatment [ 20 , 21 ], and copolymerization [ 22 , 23 ]. Thus, mechanical amorphization of crystallites increases reactivity during heterogeneous processes, which are used in food, pharmaceutical, and bioengineering industries [ 24 , 25 , 26 ].…”