Morphology and Miscibility of Chitin-Polyaniline Blend

Abstract

In this article, we discuss the blending of chitin with polyaniline (PANI) and its miscibility. Miscibility of the chitin-PANI blend has been studied by solution viscometry, Fourier transform infrared (FTIR) spectrum and scanning electron microscope (SEM) techniques. From viscosity measurement Krigbaum and Wall polymer-polymer interaction parameter (b) is calculated; it is found to be positive for all compositions of the blend. From FTIR analysis, probable interaction is predicted. Viscosity measurement of chitin and PANI blends shows a linear relationship between intrinsic viscosity and blend composition with a positive deviation from the theoretical value and positive value of b refers to the miscibility of the blend system. From SEM studies, blends having 5% lithium chloride (LiCl) show a homogeneous and continuous structure. Blends having less than 5% LiCl show a homogeneous and fibrillar structure, which is further supported by atomic force microscopy studies. Fibrous structure improves as the amount of PANI increases. FTIR analysis confirms the interaction between chitin and PANI. Further, this result is supported by DSC, TGA, XRD and dissolution studies of the blend.

Revamping squid gladii to biodegradable composites: In situ grafting of polyaniline to β-chitin and their antibacterial activity

“…This may be explained by the hygroscopic nature of β-chitin, a polysaccharide containing multiple functional groups (-OH and -NH 2 ) that are easily hydrated. 30 Contrastingly, PANI only has benzene, which is hydrophobic; and -NH- and −NH + = groups. Hence for the β-chitin-g-PANI composite, it is anticipated that the intensity of the endothermic peak within this temperature range would fall in the middle of pristine β-chitin and PANI as a consequence of grafting, as seen in Figure 3(d).…”

Doped Poly(3-hexylthiophene) Coatings onto Chitosan: A Novel Approach for Developing a Bio-Based Flexible Electronic

“…The poor electrical properties shown by these systems can be explained by their preparation methodology. In the case of polymer blends, the main drawback is the usual immiscibility between both polymeric components that leads to a phase separation, avoiding the existence of a continuous phase of the conductive polymer in the final material. ,, Additionally, because of this segregation, mechanical properties such as flexibility and film-forming ability are seriously affected. On the other hand, performing graft reactions onto biopolymer backbones has been proved to be inefficient due to the low graft yields obtained, the high amount of expensive monomer wasted, the obtention of short polymer chains with high polydispersity, and the need to design tedious purification protocols to remove solvents and chemical reagents used (initiators, etc.…”