Synthesis Of Semi-interpenetrating Networks Research Articles

Bifunctional gelatin/dextrin hybrid backbone based fluorescent chemo-sensor for the detection of tannic acid and removal of eosin yellow dye

In this work, we developed a green strategy for the fabrication of bio-based gelatin/dextrin semi-interpenetrating network (Gel-dex-cl-polyAAm) and carbon quantum dots (CQDs) nanocomposite (CQDs/Gel-dex-cl-polyAAm) for the detection of tannic acid and removal of eosin yellow dye present in water sample. The synthesis of semi-interpenetrating network (semi-IPN) was done under hot air reaction conditions using acrylamide and N,N′-methylenbisacrylamide monomer-crosslinker system. The maximum swelling response of the synthesized semi-IPN was found to be 597% after optimizing all the process parameters. The nanocomposite was derived through in-situ incursion of carbon quantum dots inside the crosslinked matrix of semi-IPN and it was capable of detecting the presence of tannic acid, selectively in wastewater through fluorescence quenching analysis. Maximum quenching efficiency was observed to be 98%. The synthesized devices were also found to be an effective absorbent for the removal of eosin yellow dye from contaminated water. Maximum dye removal potential in case of nanocomposite was found to be 92%. Adsorption isotherm and kinetics studies indicated the applicability of flory huggin's adsorption isotherm along with 2nd order kinetics. The industrial applicability of the samples was depicted from regeneration and reusability experimental essay.

Design of semi-interpenetrating networks based on poly(ethyl-2-cyanoacrylate) and oligo(ethylene glycol) diglycidyl ether

ABSTRACTThe synthesis of semi-interpenetrating networks (SIPN) based on linear poly(ethyl 2-cyanoacrylate) (PECA) and oligo(ethylene glycol) diglycidyl ether (OEGDG) based polymer networks was motivated by the hypothesis that the brittleness of polycyanoacrylates may be overcome by incorporating them into a polymer network architecture. A sequential synthetic route was applied, in which first PECA was prepared by anionic polymerization. Subsequently, OEGDG was crosslinked with different anhydrides and curing catalysts to form networks with hydrolyzable ester bonds and interpenetrating PECA. These SIPNs showed a low water uptake compared to other polyether based networks. Some of the obtained materials were transparent and exhibited a great flexibility, which was maintained also after 24 h of immersion in water and subsequent drying. Such networks could be components of future stimuli-sensitive material systems.