An Overview on Composite Sorbents Based on Polyelectrolytes Used in Advanced Wastewater Treatment

Bucătariu, Florin; Teodosiu, Carmen; Morosanu, Irina; Fighir, Daniela; Ciobanu, Ramona; Petrila, Larisa-Maria; Mihai, Marcela

doi:10.3390/polym13223963

Cited by 22 publications

(14 citation statements)

References 140 publications

(262 reference statements)

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“…Due to these features, they are widely employed as viscosity and surface modifiers as well as selective adsorbers. Consequently, these materials are useful in various industrial applications, materials and formulations from water treatment [ 7 ], membranes [ 8 , 9 ], sensors [ 10 ] and cosmetics to biomedicine with specific uses in bacterial and viral infections [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Poly(vinyl pyridine) and Its Quaternized Derivatives: Understanding Their Solvation and Solid State Properties

et al. 2022

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A series of N-methyl quaternized derivatives of poly(4-vinylpyridine) (PVP) were synthesized in high yields with different degrees of quaternization, obtained by varying the methyl iodide molar ratio and affording products with unexplored optical and solvation properties. The impact of quaternization on the physicochemical properties of the copolymers, and notably the solvation properties, was further studied. The structure of the synthesized polymers and the quaternization degrees were determined by infrared and nuclear magnetic spectroscopies, while their thermal characteristics were studied by differential scanning calorimetry and their thermal stability and degradation by thermogravimetric analysis (TG-DTA). Attention was given to their optical properties, where UV-Vis and diffuse reflectance spectroscopy (DRS) measurements were carried out. The optical band gap of the polymers was calculated and correlated with the degree of quaternization. The study was further orientated towards the solvation properties of the polymers in binary solvent mixtures that strongly depend on the degree of quaternization, enabling a better understanding of the key polymer (solute)-solvent interactions. The assessment of the underlying solvation phenomena was performed in a system of different ratios of DMSO/H2O and the solvatochromic indicator used was Reichardt’s dye. Solvent polarity parameters have a significant effect on the visible spectra of the nitrogen quaternization of PVP studied in this work and a detailed path towards this assessment is presented.

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Section: Introductionmentioning

confidence: 99%

Poly(vinyl pyridine) and Its Quaternized Derivatives: Understanding Their Solvation and Solid State Properties

et al. 2022

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“…Gelation and network formation can be induced in different ways, either through chemical, physical, or combined crosslinking, as it was discussed in recent comprehensive reviews [1,2,4,[18][19][20]30,[55][56][57][58][59][60]. The characteristics of the building blocks influence in high extent the physico-chemical, mechanical, and biological properties of the hydrogels.…”

Section: Bioinspired Approaches For the Design Of Hydrogels With Targ...mentioning

confidence: 99%

“…From a chemical point of view, the hydrogels can be obtained from natural or synthetic water soluble (co)polymers of various structures and architectures, interpenetrated polymer networks (IPNs), proteins, peptides, clays, multicomponent systems, etc., having different morphologies and functions [1][2][3]. In particular, smart networks able to respond to physical, chemical, and biological stimuli gained much attention for a wide range of applications: tissue engineering [4], bone regeneration [5], controlled-release drug delivery vehicles [6], wound healing [7], soft robotics [8], biosensing [9], intelligent electronics and artificial intelligence [10], actuators [11][12][13], stretched electronic devices [14], hygiene products [15,16], contact lens [17], cosmetics [18], food nutrition and health, food safety and food engineering and processing [19], advanced wastewater treatment [20], catalysis [21][22][23], etc.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Hydrogels as Platforms for Life-Science Applications: Challenges and Opportunities

Bercea¹

2022

Polymers

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Hydrogels, as interconnected networks (polymer mesh; physically, chemically, or dynamic crosslinked networks) incorporating a high amount of water, present structural characteristics similar to soft natural tissue. They enable the diffusion of different molecules (ions, drugs, and grow factors) and have the ability to take over the action of external factors. Their nature provides a wide variety of raw materials and inspiration for functional soft matter obtained by complex mechanisms and hierarchical self-assembly. Over the last decade, many studies focused on developing innovative and high-performance materials, with new or improved functions, by mimicking biological structures at different length scales. Hydrogels with natural or synthetic origin can be engineered as bulk materials, micro- or nanoparticles, patches, membranes, supramolecular pathways, bio-inks, etc. The specific features of hydrogels make them suitable for a wide variety of applications, including tissue engineering scaffolds (repair/regeneration), wound healing, drug delivery carriers, bio-inks, soft robotics, sensors, actuators, catalysis, food safety, and hygiene products. This review is focused on recent advances in the field of bioinspired hydrogels that can serve as platforms for life-science applications. A brief outlook on the actual trends and future directions is also presented.

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“…While pollution is generally hard to mitigate, novel techniques for the efficient removal of pollutants are deeply investigated. A special interest is raised by water pollution since water is a very good solvent for a lot of dangerous chemicals, such as dyes, pesticides, and metal ions, which can pass from water sources to plants, animals, and even humans and raise important health concerns due to their toxicity, bioaccumulation, and carcinogenic effects [116]. The use of polymer/enzyme composite materials in environmental applications has attracted increased interest in recent years due to their versatility and stability, satisfactory catalytic activity, and the possibility of reusing the material without an important loss of catalytic activity [117].…”

Section: Applications In Environmental Protectionmentioning

confidence: 99%

Polymer/Enzyme Composite Materials—Versatile Catalysts with Multiple Applications

Petrila¹,

Gradinaru

Bucătariu³

et al. 2022

Chemistry

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A significant interest was granted lately to enzymes, which are versatile catalysts characterized by natural origin, with high specificity and selectivity for particular substrates. Additionally, some enzymes are involved in the production of high-valuable products, such as antibiotics, while others are known for their ability to transform emerging contaminates, such as dyes and pesticides, to simpler molecules with a lower environmental impact. Nevertheless, the use of enzymes in industrial applications is limited by their reduced stability in extreme conditions and by their difficult recovery and reusability. Rationally, enzyme immobilization on organic or inorganic matrices proved to be one of the most successful innovative approaches to increase the stability of enzymatic catalysts. By the immobilization of enzymes on support materials, composite biocatalysts are obtained that pose an improved stability, preserving the enzymatic activity and some of the support material’s properties. Of high interest are the polymer/enzyme composites, which are obtained by the chemical or physical attachment of enzymes on polymer matrices. This review highlights some of the latest findings in the field of polymer/enzyme composites, classified according to the morphology of the resulting materials, following their most important applications.

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An Overview on Composite Sorbents Based on Polyelectrolytes Used in Advanced Wastewater Treatment

Cited by 22 publications

References 140 publications

Poly(vinyl pyridine) and Its Quaternized Derivatives: Understanding Their Solvation and Solid State Properties

Poly(vinyl pyridine) and Its Quaternized Derivatives: Understanding Their Solvation and Solid State Properties

Bioinspired Hydrogels as Platforms for Life-Science Applications: Challenges and Opportunities

Polymer/Enzyme Composite Materials—Versatile Catalysts with Multiple Applications

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