Optimized preparation of micro-block CPAM by response surface methodology and evaluation of dewatering performance

Li, Xiang; Zheng, Huaili; Gao, Baoyu; Sun, Yongjun; Tang, Xiaomin; Xu, Bincheng

doi:10.1039/c6ra25245a

Cited by 27 publications

(29 citation statements)

References 36 publications

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“…The band observed at 1037 cm −1 for copolymers containing APSA (Samples 2, 4, and 5) decisively shows the existence of anionic monomers in the structure of copolymer, which is corresponded to the stretching vibrations of SO 3 group. The vibrations observed in 967 cm −1 in Samples 3 and 4 are attributed to the quaternary ammonium group in ethoxylated group of ATAC cationic polymer . The bands at 1649 and 2930 cm −1 were attributed to the carbonyl group (C=O) in amide group and ‐CH 3 stretching vibrations, respectively.…”

Section: Resultsmentioning

confidence: 92%

Improved rheological properties and stability of multiwalled carbon nanotubes/polymer in harsh environment

Nourafkan

Haruna

Gardy

et al. 2018

J of Applied Polymer Sci

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This work aims to improve the rheological properties and stability of multiwalled carbon nanotubes (MWCNTs)/acrylamide (AA) base skeleton polymer blends at harsh environment of high salinity‐high temperature (HS‐HT) or various pH. Different co/terpolymers have been accomplished to modify the structure of AA polymer by free‐radical copolymerization of AA‐based monomers. Anionic, cationic, and hydrophobic functional groups were used for the synthesis of polyelectrolyte, polyampholytic, and partially hydrophobic AA polymer types. The conversion, molecular weight, and poly dispersity of co/terpolymers have been evaluated by nuclear magnetic resonance (1H‐NMR), gel permeation chromatography, and differential scanning calorimetry analysis. The effects of sonication power, concentration of polymer, and concentration of MWCNTs were also investigated on rheological behavior of co/terpolymers. The results show that negative polyelectrolyte and polyampholytic polymers are the best candidates for the improvement of MWCNTs/polymer stability and viscosity at HS‐HT and alkali environment, respectively. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47205.

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Section: Resultsmentioning

confidence: 92%

Improved rheological properties and stability of multiwalled carbon nanotubes/polymer in harsh environment

Nourafkan

Haruna

Gardy

et al. 2018

J of Applied Polymer Sci

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“…As shown in Fig. 1(a), the peaks at 1530, 1491, 1450 and 970 cm -1 which represent the deformation vibration of methylene, quaternary ammonium methyl and mono substituted methyl ammonium (N-H), stretching vibration of -N + (CH 3 ) 3 in MAPTAC unit were observed [15]. The peaks at 3438 and 1668 cm -1 which represent -NH 2 and C=O in AM unit were also observed [16,17].…”

Section: Resultsmentioning

confidence: 81%

Ultrasonic Assisted Synthesis of Cationic Polyacrylamide and Its Dewatering performance evaluation

Li¹,

Yang²,

Shou³

et al. 2018

Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)

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Abstract:In this study, an acid and alkali resistance cationic polyacrylamide flocculants (P(AM-MAPTAC)) was synthesized through copolymerization of acrylamide (AM) and methacrylamido propyl trimethyl ammonium chloride (MAPTAC) by innovative ultrasonic initiation technology. The structure and thermal decomposition property of the obtained polymer were observed through FTIR and TG/DSC measurements respectively. The dewatering performance of P(AM-MAPTAC) was also evaluated by measuring the supernatant residual turbidity (RT), moisture content of the filter cake (FCMC), and chemical oxygen demand (COD) removal rate of the sludge. The RT, FCMC, and COD reached 14.80 NTU, 83.72 %, and 66.8%, respectively, at 40 mg L −1 of P(AM-MAPTAC) and pH of 10.0. Furthermore, P (AM-MAPTAC) showed good acid and alkali resistance, and had better application value.

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“…Peak at 967 cm −1 represents N + (CH 3 ) 3 bending vibration. Tertiary amine of APTAC gives CN stretching in the range of 1300–1000 cm −1 , here, it is at 1246 cm −1 . In Figure (b), the distinguishable peak at 3292 cm −1 corresponds to >NH stretching vibration of amide overlapped with OH stretching of carboxylic group of gel.…”

Section: Resultsmentioning

confidence: 85%

Pectin‐[(3‐acrylamidopropyl) trimethylammonium chloride‐co‐acrylic acid] hydrogel prepared by gamma radiation and selectively silver (Ag) metal adsorption

Bhuyan

Okabe

Hidaka

et al. 2017

J of Applied Polymer Sci

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Pectin‐[(3‐acrylamidopropyl) trimethylammonium chloride‐co‐acrylic acid] hydrogel has been prepared from the aqueous blend solution of pectin, (3‐acrylamidopropyl) trimethylammonium chloride (APTAC), and acrylic acid (AAc) by applying gamma radiation of different doses (1–25 kGy) from 60Co gamma source. The hydrogels were characterized by equilibrium swelling, Fourier transform infrared, differential scanning calorimetry, and scanning electron microscopy. The hydrogels were used in multielement adsorption and it was found that pectin‐(APTAC‐co‐AAc) gel is highly selective toward silver (I) ion among 27 metal ions. The data obtained from equilibrium adsorption studies were fitted in Langmuir and Freundlich adsorption isotherm models and model parameters evaluated. The maximum adsorption capacity of pectin‐(APTAC‐co‐AAc) gel was found to be 67.6413 mg/g of dry gel at sample volume of 25 mL. The kinetic data were tested using pseudo‐first order and pseudo‐second order kinetic models and different adsorption diffusion models such as film diffusion and intra‐particle diffusivity model. Thiourea solution was used for desorption of adsorbed metal ions from the hydrogel. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45906.

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Optimized preparation of micro-block CPAM by response surface methodology and evaluation of dewatering performance

Abstract: Micro-block cationic polyacrylamide (P(AM-MAPTAC)) was synthesized through UV-initiated template copolymerization and characterized by FTIR, 1H NMR, SEM and TG/DSC analyses.

Cited by 27 publications

References 36 publications

Improved rheological properties and stability of multiwalled carbon nanotubes/polymer in harsh environment

Improved rheological properties and stability of multiwalled carbon nanotubes/polymer in harsh environment

Ultrasonic Assisted Synthesis of Cationic Polyacrylamide and Its Dewatering performance evaluation

Pectin‐[(3‐acrylamidopropyl) trimethylammonium chloride‐co‐acrylic acid] hydrogel prepared by gamma radiation and selectively silver (Ag) metal adsorption

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