Designing a Robust Biocompatible Porous Polymeric Membrane Using Laponite and Graphene Oxide for Versatile and Selective Adsorption of Water Contaminants

Upreti, Divyansh; Rajendran, A.; Lenka, Nibedita; Srivastava, Rajat; Gupta, Ria Sen; Maiti, B. R.; Bose, Suryasarathi; Patro, T. Umasankar

doi:10.2139/ssrn.4327288

Cited by 2 publications

(3 citation statements)

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“…HS with a high glass transition temperature ( T g ) ensures mechanical properties, and thermal and solvent resistance, while SS with a low T g gives flexibility, elasticity, and impact strength 1,2 . TPUs, which have excellent mechanical properties and biocompatibility, 3‐8 are used in various biomedical applications, such as coating materials for implants, pacemaker leads, catheters, prosthetic valve leaflets, cardiovascular implants, and artificial hearts 5,9–17 . These properties are the result of the hydrophilic‐hydrophobic balance on their surface.…”

Section: Introductionmentioning

confidence: 99%

“…which have excellent mechanical properties and biocompatibility, [3][4][5][6][7][8] are used in various biomedical applications, such as coating materials for implants, pacemaker leads, catheters, prosthetic valve leaflets, cardiovascular implants, and artificial hearts. 5,[9][10][11][12][13][14][15][16][17] These properties are the result of the hydrophilic-hydrophobic balance on their surface.…”

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confidence: 99%

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Thermoplastic polyurethane/POSS nanohybrids: Synthesis, morphology, and biological properties

Ozimek,

Malarz,

Mrozek‐Wilczkiewicz

et al. 2024

J Biomed Mater Res

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Recent studies show good osteoinductive properties of polyurethanes modified with polyhedral oligomeric silsesquioxanes (POSS). In this work, three types of POSS; propanediolisobutyl‐POSS (PHI‐POSS), disilanolisobutyl‐POSS (DSI‐POSS), and octahydroxybutyl‐POSS (OCTA‐POSS) were chemically incorporated into linear polyurethane based on an aliphatic isocyanate, hexamethylene diisocyanate (HDI), to obtain new nanohybrid PU‐POSS materials. The full conversion of POSS was confirmed by Fourier transform infrared spectroscopy (FTIR‐ATR) spectra of the model reactions with pure HDI. The materials obtained were investigated by FTIR, SEM‐EDS, and DSC. The DSC studies showed the thermoplasticity of the obtained materials and apparently good recovery. 30‐day immersion in SBF (simulated body fluid) revealed an increase in the rate of deposition of hydroxyapatite (HAp) for the highest POSS loadings, resulting in thick layers of hydroxyapatite (~60–40 μm), and the Ca/P ratio 1.67 (even 1.785). The structure and properties of the inorganic layer depend on the type of POSS, the number of hard segments, and those containing POSS, which can be tailored by changing the HDI/poly(tetramethylene glycol) (PTMG) ratio. Furthermore, the obtained composites revealed good biocompatibility, as confirmed by cytotoxicity tests conducted on two cell lines; normal human dermal fibroblasts (NHDF) and primary human osteoblasts (HOB). Adherent cells seeded on the tested materials showed viability even after a 48‐h incubation. After this time, the population of viable, and proliferating cells exceeded 90%. Bioimaging studies have shown the fibroblast and osteoblast cells were well attached to the surface of the tested materials.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Thermoplastic polyurethane/POSS nanohybrids: Synthesis, morphology, and biological properties

Ozimek,

Malarz,

Mrozek‐Wilczkiewicz

et al. 2024

J Biomed Mater Res

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“…Embedded nanomaterials into hydrogel networks to obtain nanocomposite hydrogels can overcome the limitations of insu cient strength and heat resistance of traditional hydrogels [12,13]. Laponite is a type of synthetic layered silicate nano-clay, with a diameter of ∼30 nm and thickness of ∼1 nm [14]. Dispersed into water, nanosheet structure of Laponite generates negative charges on the surfaces [15], which is bene cial for the adsorption of heavy metal ions.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Laponite/poly(AA-AM) composite hydrogels for efficient removal of heavy metals

Huang,

Wan,

Chen

et al. 2024

Preprint

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Heavy metal wastewater contamination has become one of the greatest global environmental problems. In this study, magnetic Laponite/poly(AA-AM) composite hydrogels (mLap/(AA-AM)) with multi-level three-dimensional networks were for the first time synthesized by radical copolymerization based on poly(acrylamide-co-acrylic acid), Laponite and PEI-magnetic nanoparticles. mLap/(AA-AM) with porous and uneven structure has the target structure and composition confirmed by FTIR, FESEM, EDX and XRD results. FTIR and XRD results show that mLap/(AA-AM) has been successfully prepared without destroying high crystallinity of magnetic Fe3O4 and Laponite is dispersed in the polymer matrix with amorphous structure. mLap/(AA-AM) have high adsorption capacities of Cu(II) (238mg/g), Cd(II) (259mg/g) and Pb(II)(466mg/g). The endothermic, entropy increasing and spontaneous nature of heavy metal ion adsorption is revealed from thermodynamic study. Heavy metal ions adsorption isotherms and kinetics are in agreement with the Langmuir model and pseudo-second-order kinetic model, respectively. In addition, mLap/(AA-AM) has good magnetic response and magnetic solid-liquid separation property, high gel strength and reusability, which can solve the disadvantage of insufficient gel strength and complicated recovery process of conventional hydrogels and has thus huge potential in removing heavy metal ions from the contaminated wastewater.

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Designing a Robust Biocompatible Porous Polymeric Membrane Using Laponite and Graphene Oxide for Versatile and Selective Adsorption of Water Contaminants

Cited by 2 publications

References 0 publications

Thermoplastic polyurethane/POSS nanohybrids: Synthesis, morphology, and biological properties

Thermoplastic polyurethane/POSS nanohybrids: Synthesis, morphology, and biological properties

Magnetic Laponite/poly(AA-AM) composite hydrogels for efficient removal of heavy metals

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