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Synthesis of a cationic polyacrylamide by a photocatalytic surface-initiated method and evaluation of its flocculation and dewatering performance: nano-TiO2 as a photo initiator. In the face of complex water quality changes, the application of existing cationic polyacrylamide has been largely limited. In this study, a series of cationic ...
Get PriceThe method of using the cationic polyacrylamide of this invention as a drainage agent, may be a conventional method known to those skilled in the art. The advantage of this invention, however, is that after the polyacrylamide and hypohalogenite are reacted together at high temperature for a short time as described above, they are added to the ...
Get Price2019-4-23 · Synthesis of cationic polyacrylamides (CPAMs) by introducing cationic polymer precursors followed by chain extension of acrylamide (AM) homopolymer blocks via RAFT polymerization is a promising approach for engineering high-performance CPAMs. However, the aqueous solution polymerization of AM usually leads to high viscosity, thus limiting the solid content in the …
Get Price2019-4-22 · Synthesis of cationic polyacrylamide via inverse emulsion polymerization method for the application in water treatment. Zhenqi ChengHubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Ministry of Education, College of Chemistry and Chemical ...
Get PriceSynthesis of cationic polyacrylamides (CPAMs) by introducing cationic polymer precursors followed by chain extension of acrylamide (AM) homopolymer blocks via RAFT polymerization is a promising approach for engineering high-performance CPAMs.
Get Price2019-4-23 · Synthesis of cationic polyacrylamides (CPAMs) by introducing cationic polymer precursors followed by chain extension of acrylamide (AM) homopolymer blocks viaRAFT polymerization is a promising approach for engineering high-performance CPAMs.
Get Price2017-3-15 · Another cationic polyacrylamide with intrinsic viscosity of 4.2 dL g −1 was synthesized in 120 min from aqueous photo-polymerization; a 200-W high-pressure mercury lamp was used in polymerization. Moreover, these studies also reported the improvement in …
Get Price2021-7-13 · Full Article. A CATIONIC POLYACRYLAMIDE DISPERSION SYNTHESIS BY DISPERSION POLYMERIZATION IN AQUEOUS SOLUTION. Yufeng Wang, a,b, * Kefu Chen, a Lihuan Mo, a,* and Huiren Hu c A cationic polyacrylamide (CPAM) dispersion, the copolymer of acrylamide (AM) and acryloyloxyethyltrimethyl ammonium chloride (DAC), has been synthesized through dispersion …
Get PriceSynthesis of a cationic polyacrylamide by a photocatalytic surface-initiated method and evaluation of its flocculation and dewatering performance: nano-TiO2 as a photo initiator. In the face of complex water quality changes, the application of existing cationic polyacrylamide has been largely limited.
Get PriceSynthesis of block cationic polyacrylamide precursors using an aqueous RAFT dispersion polymerization† Bo Huang,a Jie Jiang,a Mutian Kang,a Pingwei Liu,*ab Hailong Sun,*c Bo-Geng Lia and Wen-Jun Wang *ab Synthesis of cationic polyacrylamides (CPAMs) by introducing cationic polymer precursors followed by
Get PriceCationic polyacrylamide (CPAM) were used extensively in water treatment, enhanced oil recovery and sludge dewatering. The review summarized the synthesis methods research progress of cationic flocculants. Four groups of synthesis technologies of cationic copolymers were reviewed, including aqueous solution polymerization, dispersion polymerization, inverse emulsion polymerization and photo...
Get Price2021-6-20 · Full Article. Synthesis and Application of a Cationic Polyacrylamide Dry Strength Agent with Anionic Content. Guangyan Wang and Yi Jing* A new net-cationic polyacrylamide dry strength agent was synthesized through free radical polymerization using acrylamide (AM), itaconic acid (IA), N,N-dimethylacrylamide (F), and sodium methallyl sulfonate (T).
Get Price2020-1-2 · Synthesis of the Hydrophobic Cationic Polyacrylamide (PADD) Initiated by Ultrasonic and ... treatment [12–14]. Cationic polyacrylamide (CPAM) is one of the most widely used flocculants for separating colloidal suspensions. Positively charged CPAM can completely neutralize negatively ... It is an environmentally friendly initiation method and
Get Price2017-3-15 · 2.3. Measurement of intrinsic viscosity and positive charge density. The intrinsic viscosity of the PADC was measured by one point method accurately .The flow time of the copolymer solutions in capillary tube was acquired using Ubbelohde viscometer (capillary diameter 0.5–0.6 mm) at (30 ± 0.1) °C.The positive charge density of the PDAC was determined by titration method .
Get Price2018-10-18 · Carbon black was modified using various liquid‐phase oxidation methods (modified carbon black = m‐CB, m = (1, 2, 3): 1, sulfuric acid/potassium permanganate method; 2, nitric acid method; 3, hydrogen peroxide method).With acetone–ethylene glycol as initiator, dimethyldiallylammonium chloride (DMDAAC) and acrylamide (AM) as monomer, cationic polyacrylamide (CPAM) was prepared by UV ...
Get Price2020-9-23 · In this study, we investigated the method of a new cationic polyacrylamide flocculants. PADD was prepared by UV initiation polymerization. The cationic flocculants were characterized by FTIR, TG DSC, 1 H NMR and SEM. Therefore, results shows that PADD and PAM are not only simple physical mixtures, they have bond interaction and mutual ...
Get PriceThe method has simple production safety, process equipment and low cost of production, etc., is currently abroad method commonly used in the production of polyacrylamide. Using this method of production of polyacrylamide disc polymerization earliest use hand-workshop-style, then using a kneading machine.
Get Price2021-6-20 · Full Article. Synthesis and Application of a Cationic Polyacrylamide Dry Strength Agent with Anionic Content. Guangyan Wang and Yi Jing* A new net-cationic polyacrylamide dry strength agent was synthesized through free radical polymerization using acrylamide (AM), itaconic acid (IA), N,N-dimethylacrylamide (F), and sodium methallyl sulfonate (T).
Get PriceCationic polyacrylamide (CPAM) were used extensively in water treatment, enhanced oil recovery and sludge dewatering. The review summarized the synthesis methods research progress of cationic flocculants. Four groups of synthesis technologies of cationic copolymers were reviewed, including aqueous solution polymerization, dispersion polymerization, inverse emulsion polymerization and photo...
Get Price2018-10-18 · Carbon black was modified using various liquid‐phase oxidation methods (modified carbon black = m‐CB, m = (1, 2, 3): 1, sulfuric acid/potassium permanganate method; 2, nitric acid method; 3, hydrogen peroxide method).With acetone–ethylene glycol as initiator, dimethyldiallylammonium chloride (DMDAAC) and acrylamide (AM) as monomer, cationic polyacrylamide (CPAM) was prepared by UV ...
Get PriceAbstract This work presents a preparation process and flocculation performance evaluation of a novel cationic polyacrylamide PADC synthesized by low-pressure ultraviolet (UV) initiation. Flocculant of PADC was polymerized with acrylamide (AM), diallyl dimethyl ammonium chloride (DMDAAC) and coconut diethanolamide (CDEA) in homogeneous aqueous solution under the irradiation of low-pressure UV ...
Get PriceCationic polyacrylamide is a derivative of polyacrylamide, a cationic polymer flocculant which has an excellent effect on sewage treatment. Our existing cationic polyacrylamide are mostly prepared by the Mannich reaction ,which has the shortcomings of more unreacted material, low cationic degree, poor stability, short validity, etc. Therefore, a cationic polyacrylamide has been prepared by ...
Get Price2.3. Characterization of Copolymers. The intrinsic viscosities and the cationic degree (CD) of polymers were determined by using an Ubbelohde viscosity meter (Shanghai Shenyi Glass Instrumental Co. Ltd., China) at 30°C and colloid titration method, respectively [15, 18].In addition, the FT-IR spectra of polymers were conducted on a 550 Series II infrared spectrometer (Mettler Toledo ...
Get Price2016-5-18 · Pretreatments of starch using acid, alkaline, and microwave did not significantly affect the DS and RE. The resultant cationic starch flocculants and cationic polyacrylamide (CPAM), a commercial flocculant, were tested in harvesting experiments involving live algae grown in fresh water or animal manure. The harvest efficiency was affected by
Get PriceUV-Initiated Polymerization of Cationic Polyacrylamide: Synthesis, Characterization, and Sludge Dewatering Performance ... Seventeen observed responses were used to calculate the model using Box-Behnken method. From the experimental data, the quadratic regression models were established using Design Expert V8.0.6, as shown in
Get Price2010-10-15 · In this paper, synthesis of starch-graft-poly(acrylamide-co-acrylacyloxyethyl trimethyl ammonium chloride) [S-g-P(AM-co-AAC)] is studied by using a complex initiation system of urea [CO(NH 2) 2] and ammonium persulfate [(NH 4) 2 S 2 O 8]. The article discusses the preparation method and effect of reaction conditions on properties of the product.
Get Price2018-6-10 · Synthesis and characterization of amphoteric polyacrylamide by dispersion polymerization in aqueous salts solution Y. Zou, Y.H. Zhang and P.X. He* Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P.R. China
Get PriceThe method of using the cationic polyacrylamide of this invention as a drainage agent, may be a conventional method known to those skilled in the art. The advantage of this invention, however, is that after the polyacrylamide and hypohalogenite are reacted together at high temperature for a short time as described above, they are added to the ...
Get PriceCationic polyacrylamide (CPAM) were used extensively in water treatment, enhanced oil recovery and sludge dewatering. The review summarized the synthesis methods research progress of cationic flocculants. Four groups of synthesis technologies of cationic copolymers were reviewed, including aqueous solution polymerization, dispersion polymerization, inverse emulsion polymerization and photo...
Get Price2020-1-2 · Synthesis of the Hydrophobic Cationic Polyacrylamide (PADD) Initiated by Ultrasonic and ... treatment [12–14]. Cationic polyacrylamide (CPAM) is one of the most widely used flocculants for separating colloidal suspensions. Positively charged CPAM can completely neutralize negatively ... It is an environmentally friendly initiation method and
Get PriceIn this study, a new type of hydrophobic cationic polyacrylamide P (AM-DMC-DABC) (PADD) was synthesized by ultrasonic (US)-initiated polymerization, which is used for the separation and removal of coal mine wastewater. The acrylamide (AM), methacryloyloxyethyl trimethyl ammonium chloride (DMC) and acryloyloxyethyl dimethylbenzyl ammonium chloride (DABC) were used as monomers to prepare).
Get Price2018-4-1 · Ultrasound-initiated synthesis of cationic polyacrylamide for oily wastewater treatment: Enhanced interaction between the flocculant and contaminants Author links open overlay panel Chuanliang Zhao a b Huaili Zheng a b Baoyu Gao c Yongzhi Liu a …
Get Price2019-7-30 · ResearchArticle Synthesis of a Cationic Polyacrylamide under UV Initiation and Its Flocculation in Estrone Removal JiaoxiaSun ,1,2 XiqinMa ,1,2 XiangLi,3 JianxinFan,1,2 QingkongChen,1,2 XuelianLiu,1,2 andJinPan1,2 SchoolofRerandOceanEngineer,ChongqingJiaotongUniversity,Chongqing, China
Get Price2019-5-25 · Synthesis of a cationic polyacrylamide by a photocatalytic surface-initiated method and evaluation of its flocculation and dewatering performance: nano-TiO 2 as a photo initiator. RSC Advances 2018 , 8 (50) , 28329-28340.
Get Price2020-8-28 · A hydrophobically associating cationic polyacrylamide (HACPAM) was prepared by using a micellar polymerization method with V-50 (azobisisobutyramidine hydrochloride) as the initiator and acrylamide, acryloyloxyethyl trimethylammonium chloride and butyl methacrylate as substrates under ultraviolet light irradiation.
Get Price2021-2-1 · Hierarchical porous SAPO-34 catalysts were prepared by using a one-step hydrothermal synthesis method. First, 2.07 g of pseudoboehmite was dispersed in 12.86 g of deionized water and stirred for 0.5 h, followed by the addition of 3.46 g of phosphoric acid. The mixture was stirred for 2 h. Then, 0.39 g of silica was added to the above mixture.
Get Price2018-6-10 · Synthesis and characterization of amphoteric polyacrylamide by dispersion polymerization in aqueous salts solution Y. Zou, Y.H. Zhang and P.X. He* Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P.R. China
Get PriceThe method of using the cationic polyacrylamide of this invention as a drainage agent, may be a conventional method known to those skilled in the art. The advantage of this invention, however, is that after the polyacrylamide and hypohalogenite are reacted together at high temperature for a short time as described above, they are added to the ...
Get PriceCationic polyacrylamide (CPAM) were used extensively in water treatment, enhanced oil recovery and sludge dewatering. The review summarized the synthesis methods research progress of cationic flocculants. Four groups of synthesis technologies of cationic copolymers were reviewed, including aqueous solution polymerization, dispersion polymerization, inverse emulsion polymerization and photo...
Get Price2020-1-2 · Synthesis of the Hydrophobic Cationic Polyacrylamide (PADD) Initiated by Ultrasonic and ... treatment [12–14]. Cationic polyacrylamide (CPAM) is one of the most widely used flocculants for separating colloidal suspensions. Positively charged CPAM can completely neutralize negatively ... It is an environmentally friendly initiation method and
Get Price2017-8-25 · Abstract: In this paper, cationic polyacrylamide microspheres (CPAM) were synthesized using acrylamide (AM) and methacryloyloxyethyl trimethyl ammonium chloride (TMAEMC) as monomers, ... the widely used method is injecting ... 2.2.2 Synthesis of cationic polyacrylamide microspheres (CPAM) Monomers of AM and TMAEMC were weighed and put
Get Price2003-8-4 · The copolymer P(AM-co-4VP) of acrylamide (AM) and 4-vinylpyridine (4VP) was synthesized by radical copolymerization in solution, and then the copolymer was quaternarized using dimethyl sulfate to produce cationic P(AM-co-4VP) (CPAV), a cationic polyacrylamide containing quaternary pyridine salt. Two series of CPAV have been synthesized.
Get PriceUltrasonic Assisted Synthesis of Cationic Polyacrylamide and Its Dewatering performance evaluation Xiang Li1*, a, Baojun Yang2, b, Qianying Shou3, c, Guoming Zeng1, d, Pei Wu1, e 1 School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China 2 Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of
Get Price2019-7-30 · ResearchArticle Synthesis of a Cationic Polyacrylamide under UV Initiation and Its Flocculation in Estrone Removal JiaoxiaSun ,1,2 XiqinMa ,1,2 XiangLi,3 JianxinFan,1,2 QingkongChen,1,2 XuelianLiu,1,2 andJinPan1,2 SchoolofRerandOceanEngineer,ChongqingJiaotongUniversity,Chongqing, China
Get Price2021-2-1 · Hierarchical porous SAPO-34 catalysts were prepared by using a one-step hydrothermal synthesis method. First, 2.07 g of pseudoboehmite was dispersed in 12.86 g of deionized water and stirred for 0.5 h, followed by the addition of 3.46 g of phosphoric acid. The mixture was stirred for 2 h. Then, 0.39 g of silica was added to the above mixture.
Get Price2018-6-10 · Synthesis and characterization of amphoteric polyacrylamide by dispersion polymerization in aqueous salts solution Y. Zou, Y.H. Zhang and P.X. He* Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P.R. China
Get Price2020-1-2 · Synthesis of the Hydrophobic Cationic Polyacrylamide (PADD) Initiated by Ultrasonic and ... treatment [12–14]. Cationic polyacrylamide (CPAM) is one of the most widely used flocculants for separating colloidal suspensions. Positively charged CPAM can completely neutralize negatively ... It is an environmentally friendly initiation method and
Get PriceIn this study, a new type of hydrophobic cationic polyacrylamide P (AM-DMC-DABC) (PADD) was synthesized by ultrasonic (US)-initiated polymerization, which is used for the separation and removal of coal mine wastewater. The acrylamide (AM), methacryloyloxyethyl trimethyl ammonium chloride (DMC) and acryloyloxyethyl dimethylbenzyl ammonium chloride (DABC) were used as monomers to prepare).
Get PriceSynthesis Star-Shaped Cationic Polyacrylamide- Dimethyl- Diallyl- Ammonium- Chloride by 'Core-First' Method p.2049 Study on Thermal Conductivity of Metal/Polymer Composites Based on Software ANSYS
Get PriceUltrasonic Assisted Synthesis of Cationic Polyacrylamide and Its Dewatering performance evaluation Xiang Li1*, a, Baojun Yang2, b, Qianying Shou3, c, Guoming Zeng1, d, Pei Wu1, e 1 School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China 2 Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of
Get Price2010-4-9 · presence of PEG by using ammonium persulfate as the initiator and sodium dodecylsulfate or poly-oxyethylene(20) sorbitan monolaurate as the emul-sifier [17]. The stability of dispersion system with surfactants was weak and its viscosity was large. Until now, there are few works on synthesis of cationic polyacrylamide via aqueous two-phase
Get Price2019-7-30 · ResearchArticle Synthesis of a Cationic Polyacrylamide under UV Initiation and Its Flocculation in Estrone Removal JiaoxiaSun ,1,2 XiqinMa ,1,2 XiangLi,3 JianxinFan,1,2 QingkongChen,1,2 XuelianLiu,1,2 andJinPan1,2 SchoolofRerandOceanEngineer,ChongqingJiaotongUniversity,Chongqing, China
Get Price2019-5-25 · Synthesis of a cationic polyacrylamide by a photocatalytic surface-initiated method and evaluation of its flocculation and dewatering performance: nano-TiO 2 as a photo initiator. RSC Advances 2018 , 8 (50) , 28329-28340.
Get PriceThe invention relates to a preparation method of a cationic polyacrylamide reverse-phase microemulsion. The method is characterized by comprising the following steps: preparing acrylamide monomer, cationic monomer and hydrophobically associated monomer into a 50-70% monomer water phase solution, adding a small amount of complexing agent, compounding an imported high molecular surfactant and …
Get Price2017-4-27 · This method was repeated twice. Potassium persulfate was recrystallized twice from distilled water at 100ºC (boiling point of distilled water) using the same procedure described above. The rest of the chemicals were used without further purification. Synthesis of different molecular weight polyacrylamides Acrylamide monomer is crystalline.
Get Price2018-6-10 · Synthesis and characterization of amphoteric polyacrylamide by dispersion polymerization in aqueous salts solution Y. Zou, Y.H. Zhang and P.X. He* Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P.R. China
Get PriceIn this study, a new type of hydrophobic cationic polyacrylamide P (AM-DMC-DABC) (PADD) was synthesized by ultrasonic (US)-initiated polymerization, which is used for the separation and removal of coal mine wastewater. The acrylamide (AM), methacryloyloxyethyl trimethyl ammonium chloride (DMC) and acryloyloxyethyl dimethylbenzyl ammonium chloride (DABC) were used as monomers to prepare).
Get Price2017-8-25 · Abstract: In this paper, cationic polyacrylamide microspheres (CPAM) were synthesized using acrylamide (AM) and methacryloyloxyethyl trimethyl ammonium chloride (TMAEMC) as monomers, ... the widely used method is injecting ... 2.2.2 Synthesis of cationic polyacrylamide microspheres (CPAM) Monomers of AM and TMAEMC were weighed and put
Get PriceUltrasonic Assisted Synthesis of Cationic Polyacrylamide and Its Dewatering performance evaluation Xiang Li1*, a, Baojun Yang2, b, Qianying Shou3, c, Guoming Zeng1, d, Pei Wu1, e 1 School of Civil Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China 2 Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of
Get Price2003-8-4 · The copolymer P(AM‐co‐4VP) of acrylamide (AM) and 4‐vinylpyridine (4VP) was synthesized by radical copolymerization in solution, and then the copolymer was quaternarized using dimethyl sulfate to produce cationic P(AM‐co‐4VP) (CPAV), a cationic polyacrylamide containing quaternary pyridine salt. Two series of CPAV have been synthesized.
Get Price2019-5-25 · Synthesis of a cationic polyacrylamide by a photocatalytic surface-initiated method and evaluation of its flocculation and dewatering performance: nano-TiO 2 as a photo initiator. RSC Advances 2018 , 8 (50) , 28329-28340.
Get Price2018-1-1 · Free Online Library: Synthesis of a Cationic Polyacrylamide under UV Initiation and Its Flocculation in Estrone Removal.(Research Article) by 'International Journal of Polymer Science'; Engineering and manufacturing Ammonium compounds Ammonium paratungstate Ammonium salts Bone disorder agents Calorimetry Copolymers Estrogen Estrogens Infrared spectroscopy Nuclear magnetic …
Get Price2021-5-15 · The cationic monomers on these microblock segments can be polymerized to form a CPAMD with a new cationic microblock structure. In addition, microwave has mechanical effects such as oscillation, emulsification, and diffusion, which can accelerate the heat and mass transfer process of the reaction system, thus accelerating the reaction rate (Wiesbrock et al. 2004; Hoogenboom and …
Get PriceCationic polyacrylamide (CPAM) was synthesized by aqueous two-phase polymerization technique using acry-lamide (AM) and dimethylaminoethyl methacrylate methyl chloride (DMC) as raw materials, aqueous polyethylene glycol 20000 (PEG 20000) solution as dispersant, 2,2′-azobis(2-amidinopropane) dihydrochloride (V-50) as initiator and
Get Price2021-6-3 · Liao, Y. et al. UV-initiated polymerization of hydrophobically associating cationic polyacrylamide modified by a surface-active monomer: A comparative study of synthesis, characterization, and ...
Get Price2018-5-18 · Cationic polyacrylamide copolymers (PAMs) are used for sludge dewatering in municipal waste water treatment and might enter the environment by spreading of the sludge on agricultural land. Concern has been expressed since little is known about the degradation of PAMs in soils. To obtain detailed information on the polymer’s fate in the soil compartment, the degradation of 14C …
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