Modification of the crosslinked hyperbranched polyamide-amines by thiourea and its selective adsorption for Cu (II)

Wang, Qian; Zhu, Sining; Chen, Xi; Fan, Zhengxiu

doi:10.1007/s00289-022-04433-6

Cited by 9 publications

(3 citation statements)

References 53 publications

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“…The presently explored directions of development of the applicability of technical lignins, whether in the form of hydrogels or other forms, mainly focus on four fields of potential utilization: biomedical, agriculture, environment, and electronics [ 50 ]. This year only, researchers have described the application of lignosulfonates and other technical lignins to obtain high-efficien absorbents for the removal of Au(III) [ 51 ], Cr(VI) [ 52 ], Cu(II) [ 53 ], Co(II) [ 54 ], or Pb(II) [ 55 ] ions, amine-functionalized lignins [ 56 ] and magnetic lignosulfonate-based adsorbents for the selective removal of dyes [ 57 ] and other wastewater contaminants [ 58 ], just to name a few. Recent studies are not limited only to sorbents—lignin is a versatile starting material, which can be used to create hydrogels for capacitor and sensor applications [ 59 , 60 ], efficient photoinitiators [ 61 ], or can become a cross-linker for bioprosthetic materials of heart valves [ 62 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Thermally Stable Lignosulfonamides

et al. 2022

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Lignin, a highly aromatic macromolecule building plant cells, and cellulose are two of the most commonly occurring natural polymers. Lignosulfonate is a grade of technical lignin, obtained as a by-product in the paper and wood pulping industries, a result of the used lignin isolation method, i.e., sulfite process. In this work, sodium lignosulfonate is used as a starting material to manufacture sulfonamide derivatives of lignin in a two-step modification procedure. Since this direction of the lignin modification is rather rarely investigated and discussed, it makes a good starting point to expand the state of knowledge and explore the properties of lignosulfonamides. Materials obtained after modification underwent characterization by FTIR, SS-NMR, WAXD, SEM, and TGA. Spectroscopic measurements confirmed the incorporation of dihexylamine into the lignin structure and the formation of lignosulfonamide. The crystalline structure of the material was not affected by the modification procedure, as evidenced by the WAXD, with only minute morphological changes of the surface visible on the SEM imaging. The obtained materials were characterized by improved parameters of thermal stability in relation to the raw material. As-prepared sulfonamide lignin derivatives with a potential application as a filler in biopolymeric composites may become a new class of functional, value-added, sustainable additives.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Thermally Stable Lignosulfonamides

et al. 2022

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“…14 Conversely, the traditional adsorption methods have several problems, such as low selectivity of adsorbents, complex preparation processes, and high processing costs. 15 Ion-imprinted polymers (IIPs) are of interest because of their high selectivity for target ions in the coexistence of competing and target ions. 16 Ion-imprinting technology is a special adsorption procedure based on molecular imprinting technology, which can specifically recognize and adsorb certain ions in a specific environment.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Among the available technologies, adsorption is the most effective and economical method with minimal costs, easy operation, and great recyclability . Conversely, the traditional adsorption methods have several problems, such as low selectivity of adsorbents, complex preparation processes, and high processing costs . Ion-imprinted polymers (IIPs) are of interest because of their high selectivity for target ions in the coexistence of competing and target ions …”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Cadmium(II)-Ion-Imprinted Composites Based on Epoxy Resin

Zhu

Chen

Zhang

et al. 2022

ACS Appl. Polym. Mater.

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In recent years, ion-imprinting technology has been frequently employed to selectively eliminate heavy metals from aqueous solutions. In this study, an environment-friendly porous cadmium-ion-imprinted composite (Cd(II)-IIP) based on epoxy resin was prepared using Cd(II) ion as a template, polyethylene glycol as a porogen, epoxy resin as the carrier, and polyethylene polyamine as complexation agent and curing agent via surface imprinting technique and stepwise polymerization process. Cd(II)-IIP was further characterized using SEM-EDS, FT-IR, TGA, and XPS, the systematic adsorption investigation of Cd(II)-IIP for the Cd(II) ions was explored. The research found that the adsorption capacity of Cd(II) got to the maximum value (q m = 64.74 mg/g) at pH = 4.0 and T = 318 K and the Cd(II)-IIP had high selectivity for Cd(II) in the presence of polymetallic ions and still has good recoverability after five cycles. The results showed that the adsorption process was closer to the pseudo-second-order kinetic model, and the isothermal curves of the experimental data were more consistent with the Langmuir adsorption model, which indicated that the whole process of adsorption was mainly monolayer chemisorption and spontaneous endothermic. In addition, the XPS and FT-IR results indicate that the interaction between Cd(II) and functional groups is related to O or N atoms on Cd(II)-IIP. In summary, Cd(II)-IIP has certain advantages and considerable development prospects for the treatment of wastewater containing Cd(II).

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