[feed] Atom [feed] RSS 1.0 [feed] RSS 2.0

Upreti, D and Rajendran, A and Lenka, N and Srivastava, R and Sen Gupta, R and Maiti, B and Bose, S and Patro, TU (2023) Designing a Robust Biocompatible Porous Polymeric Membrane Using Laponite and Graphene Oxide for Versatile and Selective Adsorption of Water Contaminants. Chemical Engineering Journal, 464. p. 142738.

Full text not available from this repository. (Request a copy)


For reclaiming contaminated water, nanoparticle-incorporated porous polymeric membranes provide the requisite functionality for efficient and selective adsorption of toxic molecules. To this end, a simple yet innovative material selection strategy was adopted to prepare a robust and high-performance membrane system by the phase-inversion method using thermoplastic polyurethane (TPU), Laponite, graphene oxide (GO) and a hybrid derived from their aqueous “co-dispersion”, viz., Laponite/GO (LGO). The addition of 12 wt% LGO substantially improved the hydrophilicity, porosity, pure water flux (PWF), and mechanical properties of TPU membranes. Notably, the above membrane showed a striking 20-fold increase in PWF (from ∼27 to ∼652 Lm-2h−1), a 43-fold increase in elastic modulus, a 10-fold increase in tensile strength and a 3-fold increase in toughness and displayed synergistic improvement in mechanical properties. At 12 wt% LGO, the rejection efficiency of > 98%, >95%, and ∼86%, and the adsorption capacity of ∼47 mg/g, ∼49.3 mg/g and ∼16.8 mg/g for methylene blue (MB), crystal violet (CV) and rhodamine B (RhB) dyes, respectively were observed. The dye adsorption efficiency was comparable with that of poly(vinylidene fluoride) (PVDF)-LGO membranes. Owing to the anionic functional groups in LGO, the nanocomposite membranes displayed excellent selectivity of adsorption. The dye adsorption by the nanofiller-TPU membranes showed a pseudo-2nd-order kinetic behavior, indicating chemisorption; while the pristine TPU showed marginal physisorption of dyes. The LGO-filled membranes also showed efficient adsorption of Pb2+ and As5+ ions from water, with efficiency increasing with LGO content, showing > 90% efficiency with 15 wt% LGO. The nanocomposite membranes showed no cytotoxicity effect and supported the proliferation of human epidermal keratinocytes (HaCaT) cells. On these accounts, the LGO-TPU membranes promise the development of high-performance and cost-effective filtration membranes.

Item Type: Article
Subjects: Cell Biology
Depositing User: Mr. Rameshwar Nema
Date Deposited: 08 Aug 2023 10:54
Last Modified: 08 Aug 2023 10:54
URI: http://nccs.sciencecentral.in/id/eprint/1286

Actions (login required)

View Item View Item