Flocculative ability of uncharged and hydrolyzed graft and linear polyacrylamides

Kutsevol, N.; Naumenko, A. P.; Chumachenko, V.; Balega, A.; Bulavin, L. A.

doi:10.1016/j.molliq.2016.11.132

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…7−9 Recently, it is reported that the branched PAMs possess distinctive advantages of rapid dissolution, outstanding shear resistance, and low solution viscosity, which were considered to be significant and necessary for their practical application. 10 Therefore, many investigations are focused on the design and synthesis of branched PAM flocculants to replace the linear ones. In addition, it has been proved that branched PAMs can achieve better performance than those of traditional linear PAMs when used as flocculants in papermaking.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, facile, highly efficient, and cost-effective preparation of branched PAMs with a specific structure and unique properties has become a hot topic and has attracted intensive research interest. 10,22 Generally, the grafting-from strategy is an efficient route for the preparation of branched polymers. 23 It has been demonstrated that PAM polymers with precise chemical composition, well-defined molar mass, and complex structure were successfully synthesized using the grafting-from approach combined with reversible-deactivation radical polymerization methods, such as atom transfer radical polymerization (ATRP) and reversible addition−fragmentation chain transfer (RAFT) polymerization.…”

Section: Introductionmentioning

confidence: 99%

“…In view of the aforementioned discussion, the distinctive rheology characteristics endow the branched PAMs with wide potential applications in various fields. Hence, facile, highly efficient, and cost-effective preparation of branched PAMs with a specific structure and unique properties has become a hot topic and has attracted intensive research interest. , …”

Section: Introductionmentioning

confidence: 99%

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Water-Soluble Branched Polyacrylamides Prepared by UV-Initiated Polymerization Using a Novel Kind of Water-Soluble Macromolecular Photoinitiator

Zhang

Chen

et al. 2021

Ind. Eng. Chem. Res.

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Branched polyacrylamides (PAMs) have shown tremendous potential in wastewater treatment, papermaking, and oil drilling due to their unique molecular structure, remarkable shear stability, and effective flocculability. Efficient approaches for their industrial-scale production have attracted increasing attention. Herein, we report a facile, scalable, highly efficient, and cost-effective strategy for the production of branched PAMs through UV polymerization of acrylamide (AM) initiated with a novel water-soluble macro-photoinitiator. Through precipitation copolymerization of AM and 2-hydroxy-1-[4-(2-acryloyloxyethoxy)phenyl]-2-methyl-1-propanone (M2959), poly(AM-co-M2959)s bearing photoinitiator moieties on the backbone were successfully synthesized, which showed excellent water solubility and high photoinitiation efficiency. Most importantly, both the branching degree and main-chain length of the branched PAMs were controllable, given that the molar mass and photoinitiating group content of poly(AM-co-M2959)s could be effectively controlled by adjusting the monomer feed ratio of AM/M2959. The rheological properties of the resultant branched PAMs were characterized in detail, and excellent water solubility and shear resistance were observed, confirming the well-defined branched structure of the as-prepared PAMs. Due to their facile synthesis, simplicity of operation, and high photoinitiation efficiency, these novel macro-photoinitiators have great potential as a versatile platform for the preparation of various branched polymers containing different functional groups (not limited to branched PAMs).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Water-Soluble Branched Polyacrylamides Prepared by UV-Initiated Polymerization Using a Novel Kind of Water-Soluble Macromolecular Photoinitiator

Zhang

Chen

et al. 2021

Ind. Eng. Chem. Res.

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“…Polyacrylamide (PAM) and derivative products are well-known flocculants widely applied in various fields, such as wastewater treatment [1,2], fine sedimentation [3,4], and agglomeration flotation [5] in mineral processing. There are three main types of PAM: anionic, cationic, and nonionic, and amongst them, the anionic PAM (APAM) usually exhibits a strong flocculating effect and has been used effectively for the flocculation-sedimentation process of tailings slurry [4,6].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Flocculation and Sedimentation of Iron Tailings Slurry Based on the Regulating Behavior of Fe3+

Tao

Chen

et al. 2018

Minerals

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Based on the regulating behavior of Fe 3+ , flocculation and sedimentation tests of iron tailings slurry flocculated using 2 mg/L anionic polyacrylamide (APAM) were studied, including the tests of Fe 3+ dosage, regulating time, and pH. Flocculation-sedimentation tests showed that: a recommended addition of 56 mg/L Fe 3+ produced a surprisingly bad flocculation effect; sedimentation ability decreased with the increase of regulating time, however, the regulating ability during the first 1 min was low; Fe 3+ displayed a high regulating effect at pH 6-7, and then decreased with the increase of slurry pH. Size analysis demonstrated that the regulating ability of Fe 3+ was related to the change of floc size, which increased with the decrease of size. Zeta potential analysis and calculation showed that small concentrations of Fe 3+ and certain hydroxyl complex ions (such as Fe(OH) 2+ and Fe(OH) 2 + ) adsorbed onto the APAM molecular chains, resulting in a decreased charge density of the APAM molecules, and this electrostatic adsorption was able to make the polymer curl more easily. Fourier Transform Infrared Spectroscopic (FTIR) indicated the APAM on the hematite was slightly degraded into a monomer-like short-chain polymer while adding certain concentration of Fe 3+ . Scanning Electron Microscope (SEM) imaging showed that the network structure of APAM molecules treated by Fe 3+ collapsed, and the APAM adsorption amount on hematite was significantly reduced. Therefore, the effect of Fe 3+ on the APAM could be recommended as a new method for desorption and degradation of the APAM contained in the tailings slurry or flocs.

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Environmental Impact of Sediment Plumes in Deep-Sea Operations: Mitigation Strategies by Investigating the Efficacy of Flocculants

Mondal,

Mathew,

Goswami

et al. 2024

Springer Proceedings in Earth and Environmental Sciences

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Flocculative ability of uncharged and hydrolyzed graft and linear polyacrylamides

Cited by 9 publications

References 11 publications

Water-Soluble Branched Polyacrylamides Prepared by UV-Initiated Polymerization Using a Novel Kind of Water-Soluble Macromolecular Photoinitiator

Water-Soluble Branched Polyacrylamides Prepared by UV-Initiated Polymerization Using a Novel Kind of Water-Soluble Macromolecular Photoinitiator

A Study on the Flocculation and Sedimentation of Iron Tailings Slurry Based on the Regulating Behavior of Fe3+

Environmental Impact of Sediment Plumes in Deep-Sea Operations: Mitigation Strategies by Investigating the Efficacy of Flocculants

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