A study of the biodegradation behaviour of poly(methacrylic acid/aniline)-grafted gum ghatti by a soil burial method

Abstract

Gum ghatti-based cross-linked hydrogels have been studied for their water absorption, flocculation and biodegradation properties. To date, a lot of research has been focused on gum ghatti-based cross-linked hydrogels; however, the synthesis and characterization of gum ghatti-based conductive biomaterials are relatively less explored. Moreover, the biodegradation and moisture retention studies have not been reported for conductive hydrogels. A gum ghatti-based electrically conductive hydrogel was prepared through a two-step aqueous polymerization. Biodegradation studies of the synthesized hydrogels were conducted using a soil burial test. Interpenetrating network structures showed better degradation efficiency than semi-IPN. The weight loss of semi-IPN and IPN was 66% and 86.6%, respectively, in 60 days. Different stages of degradation were studied using FTIR and SEM techniques. Furthermore, application of hydrogels to improve the water retention properties of different soils was studied for agricultural purposes, and it was found that the IPN hydrogel can improve the moisture retention capacity of soil for cultivation.

Biodegradable and conducting hydrogels based on Guar gum polysaccharide for antibacterial and dye removal applications

“…This was due to an increase in crosslinking site density with further increase in reaction parameters beyond optimal and results in decreased pore size (Sharma et al, 2014;Wang and Wang, 2010). P s was found to increase with increase in pH and maximum P s was obtained at 7.0 pH value.…”

“…Another possible cause of this trend may be a decreased H þ screening effect with increasing pH values. Further, decreased ioneion repulsion was observed as sodium ion screening effect dominates at higher pH values and hence a reduced P s was obtained (Sharma et al, 2014).…”

“…A high conductivity at initial increase HCl concentration was due to the high degree of protonation of polyaniline imine groups, continuous crosslinked network and well doped quinoid rings (Thanpitcha et al, 2006). Decreased delocalization length of polyaniline chains due to over-protonation and hindrance in the movement of electrons between the valence band and conduction band was responsible for low electrical conductivity at higher HCl concentrations (Sharma et al, 2014).…”

Synthesis of BiodegradableGum ghattiBased Poly(methacrylic acid-aniline) Conducting IPN Hydrogel for Controlled Release of Amoxicillin Trihydrate

“…XRD patterns of Gg, Gg-gpoly(MAA), and Gg-g-poly(MAA-IPN-ANI) hydrogels were recorded and have been shown in Figure 6. A broad peak at 2θ = 19.74°is the characteristic of Gg, which reflected a partial 37 Gg-gpoly(MAA) showed a different XRD pattern with a significantly shifted and reduced main peak from the pure Gg that confirmed the formation of cross-linked hydrogel. The reduction in the peak intensity reflected that cross-linked hydrogel became more amorphous.…”

“…FTIR spectrum of Gg-g-poly(MAA-IPN-ANI) showed the characteristic peaks of PANI, as well as Gg-g-poly(MAA). 37,39 The characteristic peak at 1570 cm −1 is assigned to the CC stretching modes of the quinoid ring in the PANI backbone. The peak at 1498 cm −1 corresponds to CC stretching modes of the benzoid ring in the polyaniline backbone, and the peak at 690 cm −1 is ascribed to C−H out-of-plane bending of single substituted benzene rings (region VI in Figure 4).…”