Bifunctional Hybrid Composites from Collagen Biowastes for Heterogeneous Applications

Abstract

We report the synthesis of an electrically conductive and magnetically active hybrid biocomposite comprising collagen and polyaniline (PAni) as the matrix and iron oxide nanoparticles (IONPs) as the filler through an in situ polymerization technique. Here, the matrix biopolymer, collagen, was extracted from trimmed wastes of animal hides generated from the leather industry. The as-synthesized C/PAni/IONP hybrid biocomposite powder possesses excellent electrical conductivity, thermal stability, and saturation magnetization, thereby providing scope for a wide range of applications. We show that the bifunctional composite has an ability to conduct electrons using a light emitting diode and battery setup, degrade dye under sunlight owing to its inherent photocatalytic activity, and absorb oil from oil–water mixtures with easier collection under magnetic tracking. We also demonstrate that the composite has remarkable electromagnetic interference shielding in the X-band frequency range. The results suggest that biowastes can be converted into useful high-value hybrid materials for applications in catalysis, biological, electronic, and environmental fields, thereby presenting a scalable and sustainable approach.

Characterization of organophosphatic brachiopod shells: spectroscopic assessment of collagen matrix and biomineral components

“…The initial weight loss during TGA, 8.4 wt% for L. anatina and 7.6 wt% for D. tenuis, occurs between 30 and 200 C due to the loss of moisture and occluded water molecules. 15 The second TGA stage of weight loss of 24.6 wt% for D. tenuis and 40.6 wt% for L. anatina occurs from 200 C to 650 C, and is due to the decomposition of organic macromolecules, 38,39 including collagen and collagen-like materials 40,41 within the brachiopod shells. The nal TGA step shows thermal degradation from 650 C to 890 C which is attributed to the loss of carbonate ions (CO 3…”

Discovery of protein-based natural hydrogel from the girdle of the ‘sea cockroach’ Chiton articulatus (Chitonida: Chitonidae)

“…The maximum decomposition temperature recorded for protein-based hydrogel isolated from the girdle structure of C. articulatus was 305.9 °C, which was slightly lower than decomposition temperatures reported for other structural proteins (collagen, keratin, fibroin, etc.) in the literature ( Chomachayi et al, 2020 ; Kakkar et al, 2014 ; Mekonnen, Ragothaman & Palanisamy, 2017 ). The maximum decomposition temperatures recorded for hemicellulose-based hydrogels produced in a previous study were 300–375 °C ( Guan et al, 2014 ).…”

Characterization of Composite Nano-Bioscaffolds Based on Collagen and Supercritical Fluids-Assisted Decellularized Fibrous Extracellular Matrix

“…The DTG curve with single peak implied the uniform microstructure of cross-linked bio-scaffold/collagen was obtained after cross-linking reactions. In previous work, pure collagen exhibited decomposition with the inflection points at 320-331 • C because of the destruction of the macromolecular structure of collagen [26,27]. The resulting composite nano-bioscaffold exhibited a better thermal stability than collagen.…”