Metal cation sorption ability of immobilized and reticulated chondroitin sulfate or fucoidan through a sol-gel crosslinking scheme

Ferreira, Vanessa R.A.; Azenha, Manuel; Bustamante, A.G; Mêna, M. Teresa; Moura, Cláudia; Pereira, Carlos M.; Silva, A. Fernando

doi:10.1016/j.mtcomm.2016.08.003

Cited by 13 publications

(25 citation statements)

References 34 publications

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“…All samples were pretreated and analyzed following conditions described in previous reports. 1 To obtain the specific surface area (S), data were adjusted to the BET model, the specific pore volume (Vp) was obtained by the Gurvitch method and the average pore diameter (Dp) through the BJH theory applied to the desorption branch of the isotherm. The amount of biopolymers present in all composites was determined by two different methods.…”

Section: Characterization Of the Compositesmentioning

confidence: 99%

“…A recent series of reports described the preparation of sorbents consisting on sulfated polysaccharide [chondroitin sulfate (CS) or fucoidan (Fuc)]/polysiloxane composites. [1][2][3][4] The preparation process relied on a covalent crosslinking scheme involving a modified siloxane coupler that contains the glycidyloxypropyl group. 1 This coupler attaches to saccharides through the hydroxyl groups, leaving other groups intact, such as carboxylate and sulfate.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] The preparation process relied on a covalent crosslinking scheme involving a modified siloxane coupler that contains the glycidyloxypropyl group. 1 This coupler attaches to saccharides through the hydroxyl groups, leaving other groups intact, such as carboxylate and sulfate. These groups confer a negatively charged surface to the composites and a cation complexing ability.…”

Section: Introductionmentioning

confidence: 99%

“…These groups confer a negatively charged surface to the composites and a cation complexing ability. [1][2][3][5][6][7][8] The composites were microporous, presenting surface areas ≤12 m 2 g −1 and relatively low sorption capacities for heavy metal cations (2-24 mg g −1 ). Later on, by bioimprinting, it was possible to obtain composites with enhanced selectivity towards Pb(II).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Characterization Of the Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…It was recently reported a cross‐linking scheme for chondroitin sulfate (CS), a water soluble heteropolysaccharide of repeating disaccharide units comprising an amino sugar ( N ‐acetylgalactosamine [GalNAc]) and glucuronic acid linked by β‐(1 → 3) glycosidic bonds, and presenting sulfate groups (–O–SO 3 − ) (Figure , left).…”

Section: Introductionmentioning

confidence: 99%

Cationic imprinting of Pb(II) within composite networks based on bovine or fish chondroitin sulfate

Ferreira

Azenha

Mêna

et al. 2017

J of Molecular Recognition

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Imprinting chondroitin sulfate (CS)/silica composites with Pb(II) and Cu(II) cations was explored with CS of bovine and different fish species origin. The process was based on the assumption that particular arrangements of the linear CS chains in aqueous solution, induced so as to accommodate cross complexation with the cations, would be embodied into a tridimensional matrix created through an organoalkoxysilane sol-gel scheme. The presence of Cu(II) in the synthesis of the composites did not result in the production of significantly stronger Cu(II)-oriented binding arrangements, and therefore, the imprinting was not successful. Inversely, for Pb(II), the materials obtained exhibited a "memory" effect for the Pb(II) ions, expressed in the observation of stronger (13%-44%) binding as compared to the nonimprinted counterparts, and increased selectivity (1.5-2 folds) against Cd(II). The imprinting features observed were dependent on the CS source. However, it was not possible to identify, among a set of their properties (carboxylate and sulfate abundance, percent of disulfated units, 4S/6S ratio, and molecular weight), any that correlated directly with the observed imprinting features. The augmented selectivity provided by the cation-imprinting process may be advantageous in areas such as analytical separation, remediation, purification, sensing, and others, particularly in those cases where a certain cation is of special interest within a mixture of them.

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Effects of amylose content on starch-chitosan composite film and its application as a wound dressing

Hsiao

Huang

2019

J Polym Res

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Metal cation sorption ability of immobilized and reticulated chondroitin sulfate or fucoidan through a sol-gel crosslinking scheme

Cited by 13 publications

References 34 publications

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

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

Cationic imprinting of Pb(II) within composite networks based on bovine or fish chondroitin sulfate

Effects of amylose content on starch-chitosan composite film and its application as a wound dressing

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