Photoinitiated Polymerization of Cationic Acrylamide in Aqueous Solution: Synthesis, Characterization, and Sludge Dewatering Performance

Zheng, Huaili; Liao, Yi; Zheng, Meizhen; Zhu, Chuanjun; Ji, Fangying; Ma, Jianzhong; Wang, Fan

doi:10.1155/2014/465151

Cited by 14 publications

(17 citation statements)

References 36 publications

(51 reference statements)

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“…Although the great majority of possible applications of IL‐containing membranes are associated with electrochemistry, there are also works taking into account other eventualities. For example, the copolymer of acrylamide with acryloyloxyethyltrimethylammonium chloride obtained by photopolymerization was shown to have superior properties as a flocculant in a sludge dewatering experiment . Another flocculant was synthesized by copolymerization of acrylamide with acryloyloxyethyltrimethylammonium chloride and butyl acrylate …”

Section: Applicationsmentioning

confidence: 99%

Photoinitiated polymerization in ionic liquids and its application

Andrzejewska

2016

Polymer International

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Ionic liquids (ILs) are low-melting organic salts often liquid at room temperature, whose unique properties are the reason of increasing interest for their applications as solvents, reaction media and functional additives. The exceptional properties of ILs have proved to be particularly useful in polymer science giving the potential to produce polymeric materials with improved properties or to immobilize ILs in polymer matrices while keeping their special characteristics. One of the possibilities is polymerization in ILs which can also affect positively polymerization reactions. An especially attractive technique is photopolymerization due to the ease of process control, short reaction time and ambient working temperature. This review gives a literature survey of developments in photopolymerization processes carried out in ILs as well as applications of these processes. It covers both the photopolymerization in ILs as well as photopolymerization of IL monomers. The first part presents a short overview of physicochemical and photochemical properties of ILs; it includes also photochemical reactions and photoinitiation of polymerization in ILs. The second part covers both the basic research (kinetics of photopolymerization including polymerization rate coefficients and polymerization of IL monomers) as well as applications of UV-induced polymerization in ILs.

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Section: Applicationsmentioning

confidence: 99%

Photoinitiated polymerization in ionic liquids and its application

Andrzejewska

2016

Polymer International

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“…Monomer concentration is a critical factor in TPDA polymerization partly because the number of free radicals is determined by monomer concentration at the start of the reaction . As shown in Figure , the conversion of TPDA continuously increased in the monomer concentration range, whereas its intrinsic viscosity increased with increasing monomer concentration, peaked, and then sharply decreased.…”

Section: Resultsmentioning

confidence: 94%

“…The preparation device is the same with our previous study . The preparation of PDA was performed as follows: AM, DMD, and PAAS (mole ratio between a chain unit and DMD of 1.0) were first added to a reaction vessel made of silicate glass.…”

Section: Methodsmentioning

confidence: 99%

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Preparation, characterization, and flocculation performance ofP(acrylamide‐co‐diallyldimethylammonium chloride) by UV‐initiated template polymerization

Guan

Zheng

Zhai

et al. 2014

J of Applied Polymer Sci

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This study prepared TPDA, a high‐intrinsic‐viscosity cationic polyacrylamide, through ultraviolet (UV)‐initiated template polymerization. Acrylamide (AM) and diallyldimethylammonium chloride (DMD) served as monomers, and poly sodium polyacrylate (PAAS) served as the template. The structure of TPDA was characterized by Fourier‐transform infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, and thermogravimetric analysis. The synthetic conditions of TPDA were studied and optimized by single‐factor experiments. An optimized product was obtained at an intrinsic viscosity of 11.3 dL g−1 and a conversion rate of 97.2% with a total monomer concentration of 20%, DMD concentration of 30%, initiator concentration of 0.045%, pH of 8, EDTA concentration of 0.3%, and UV irradiation of 90 min. Results showed that TPDA was the copolymer of AM and DMD with a micro‐block structure at the molecular chain. Given its high intrinsic viscosity and cationic block structure, TPDA performed better in kaolin flocculation than that prepared without template addition. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41747.

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“…Fenton oxidation led to the degradation of EPS in the sludge and the release of EPS to the solution. Hereinto, the part of the dissolved organics was further oxidized to small molecular substances . The concentrations of protein and polysaccharide were used as an index to measure the degree of EPS degradation .…”

Section: Resultsmentioning

confidence: 99%

Effective sludge dewatering technique using the combination of Fenton's reagent and CPAM

et al. 2017

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In this study, the combination of Fenton's reagent and cationic polyacrylamide (CPAM) was used in sludge conditioning for the enhancement of sludge dewatering performance. The effects of CPAM, H2O2, and Fe2+ dosages and pH on the moisture content (MC) of the filter cake, the specific resistance of filtration (SRF), and the residual turbidity of the supernatant (RT) were investigated. To observe influencing mechanisms of sludge dewatering further, optical microscopy and scanning electron microscopy (SEM) were employed. Results demonstrated that the sludge dewatering performance obtained by the combination of Fenton's reagent and CPAM was significantly better than that obtained using Fenton's reagent or CPAM alone. The optimum conditions of sludge conditioning were as follows: 400 mg · L−1 Fe2+, 4 g · L−1 H2O2, 40 mg · L−1 CPAM, and pH 4. The SRF, MC, and RT at optimum conditions were reduced to minimum values of 1.06 × 1012 m/kg, 58.9 %, and 3.7, respectively. The optical microscopy and SEM analyses of sludge flocs confirmed that they were more conducive to sludge dewatering after the combination of Fenton oxidation and flocculation. The sludge dewatering results demonstrated that the combination of Fenton and flocculation process exhibited excellent performance in enhancing sludge dewatering and is a promising pretreatment approach to sludge disposal.

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Photoinitiated Polymerization of Cationic Acrylamide in Aqueous Solution: Synthesis, Characterization, and Sludge Dewatering Performance

Cited by 14 publications

References 36 publications

Photoinitiated polymerization in ionic liquids and its application

Photoinitiated polymerization in ionic liquids and its application

Preparation, characterization, and flocculation performance ofP(acrylamide‐co‐diallyldimethylammonium chloride) by UV‐initiated template polymerization

Effective sludge dewatering technique using the combination of Fenton's reagent and CPAM

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