Structural, morphological and electrochemical properties of a polypyrrole nanohybrid produced by template-assisted fabrication

Peshoria, Shruti; Narula, Anudeep Kumar

doi:10.1007/s10853-017-1769-z

Cited by 19 publications

(8 citation statements)

References 56 publications

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“…In addition, mesoporosity is of high importance in other specific areas such as in optics, catalysis, drug delivery systems, coatings, cosmetics, bio-separation, diagnostics, gas-separation and nanotechnology [7]. Initially, we attempted the most common approach of mesoporous templating in sol-gel processes which makes use of surfactants, such as primary amines and quaternary ammonium ions [8][9][10][11][12][13][14]. However, as explained later in detail, this approach was hampered by the presence of the biopolymers.…”

Section: Introductionmentioning

confidence: 99%

Development of mesoporous polysaccharide/sol-gel composites with two different templating agents: Surfactants and choline chloride-based deep eutectic solvents

Ferreira¹,

Azenha²,

Pinto³

et al. 2019

Express Polym. Lett.

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Mesoporous sorbent composites, evolving from previous work on microporous composites of polyanionic polysaccharides were developed with the purpose of increasing the sorptive features of the materials. Using the widely successful classical surfactant micelle approach, it was observed, in this particular case, that the composites remained essentially microporous. The alternative consisted on the application of deep eutectic solvents (DES). The most common DES (choline chloride + neutral hydrogen bond donor), were tested because of their advantages over other possibilities such as imidazolium-based ionic liquids: lower cost, easy in-house preparation, safe constituents and water stability and solubility. Possible mechanisms underlying the observed mesoporosity were discussed. The surface area ranged between 76 and 267 m 2 /g and the average pore size was in the range 3-5 nm. DES had not a negative effect on synthesis yields and, in the case of fucoidan, composites bearing a higher content of the biopolymer were produced. As a consequence and in line with the initial expectations these new composites revealed highly enhanced Pb (II) sorptive features comparatively to their microporous predecessors: chondroitin sulfate composites-up to a 5 fold capacity enhancement; fucoidan composites-up to a 3.5 fold capacity enhancement. The highest capacity was observed for the fucoidan composite prepared with choline chloride-ethyleneglycol DES, 79 mg Pb (II)/g, which is slightly above the highest value (77 mg Pb (II)/g) found in the literature for Pb (II) sorbents based on polysaccharides, sol-gels or their composites.

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Section: Introductionmentioning

confidence: 99%

Development of mesoporous polysaccharide/sol-gel composites with two different templating agents: Surfactants and choline chloride-based deep eutectic solvents

Ferreira¹,

Azenha²,

Pinto³

et al. 2019

Express Polym. Lett.

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“…4 A network of mesopores would greatly increase the binding surface and therefore render many more binding points accessible to sorbates. Commonly, mesoporous templating in sol-gel processes employs surfactant micelles as template [13][14][15][16][17] ; however, this approach was ineffective due to interference of the biopolymers with the formation of surfactant micelles. It has recently been demonstrated that mesoporous sol-gel structures may be obtained by deep-eutectic solvent (DES) templating.…”

Section: Introductionmentioning

confidence: 99%

Cation‐bioimprinted mesoporous polysaccharide/sol–gel composites prepared in media containing choline chloride‐based deep eutectic solvents

Ferreira

Azenha

Pereira

et al. 2019

J of Applied Polymer Sci

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A study on the Pb(II) imprinting performed within mesoporous sulphated biopolymer/siloxane composites, prepared in media containing deep eutectic solvent (DES), is described. In general, the process of imprinting resulted in greatly increased surface areas relatively to the corresponding nonimprinted composites [up to fivefold (from 76 m2 g−1 to 360 m2 g−1) for fucoidan (Fuc) and up to twofold (from 208 m2 g−1 to 351 m2 g−1) for chondroitin sulfate (CS) composites], the diminishing of mean pore size (from 3.3–4.6 nm to 2.9–3.4), and higher biopolymer contents (from mass fractions of 0.42–0.52 to 0.46–0.68). The sorption features depended a great deal on the biopolymer/DES combination. The best CS composite, allowed for 12% capacity and 20% binding strength, as well as Pb(II)/Cd(II) selectivity enhancements. The largest of the capacities was obtained with the imprinted Fuc/DES‐E composite, 86 mg g−1, a 10% increase. Concerning the selectivity [Pb(II) versus Cd(II)], there was a significant increase for the CS composites (from 1.0–1.1 (αqmax)/1.1–1.2 (αK) to 1.3–1.4 (αqmax)/1.3–1.6 (αK)]. In particular, the DES‐E CIC presented high selectivity factors (αqmax 3.0/αK 3.2) in line with those of the microporous version (αqmax 2.0/αK 3.3) but showing a significant increase in terms of the αqmax selectivity. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48842.

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“…The wide peak at 2θ = ca. 24.1° can be attributed to the typical amorphous structure for polymer 58,59 . Notably, there is a weak and sharp peak of 2θ = ca.…”

Section: Resultsmentioning

confidence: 94%

Facile preparation of functional and hybrid coatings by precipitations of polypyrrole and lysozyme via co‐assembly process

Zhou

Song

Wang

et al. 2021

J of Applied Polymer Sci

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The integration of biological matters and functional polymers to generate novel hybrids with multi‐functional properties has attracted an increasing attention in organic/organic systems, possessing a great promise for sensor, medical, and materials science applications. In this work, a facile co‐precipitation method was developed to prepare conductive composite via a co‐assembly process with one‐step. Lysozyme was employed as an assembly template, and the pyrrole monomers were polymerized and aggregated with the lysozyme nanoparticles via oxide polymerization, forming a hybrid and functional coating with significant conductivity of ca. 6.7 × 10−5 S. The structure and morphology of the hybrid is performed by X‐ray photoelectron spectroscopy, Fourier transform infrared spectrometer, transmission electron microscopy, field emission scanning electron microscope, and laser scanning confocal microscope, and so on. The results showed that the coating was composed of homogenously and densely hybrid nanoparticles with the diameter of ca. 250 nm, possessing a certain degree of bio‐adhesion from the lysozyme precipitations according to the 3 M peeling test. In addition, the composite performed good infrared radiation shielding property when it was coated onto normal gauze. It suggests that the composite consisting of lysozyme and polypyrrole precipitations in nanoscale may possess significantly potential applications as conductive and shielding materials.

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Structural, morphological and electrochemical properties of a polypyrrole nanohybrid produced by template-assisted fabrication

Cited by 19 publications

References 56 publications

Development of mesoporous polysaccharide/sol-gel composites with two different templating agents: Surfactants and choline chloride-based deep eutectic solvents

Development of mesoporous polysaccharide/sol-gel composites with two different templating agents: Surfactants and choline chloride-based deep eutectic solvents

Cation‐bioimprinted mesoporous polysaccharide/sol–gel composites prepared in media containing choline chloride‐based deep eutectic solvents

Facile preparation of functional and hybrid coatings by precipitations of polypyrrole and lysozyme via co‐assembly process

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