Polymers
·
2017
·Vol. 9
·期 7
·296
·
IF 3.364
Caili Dai,Zhongliang Xu,Yining Wu,Chenwei Zou,Xuepeng Wu,Tao Wang,Xu Guo,Mingwei Zhao
Water-soluble polymers are widely used in oilfields. The rheological behaviors of these polymers in high-salinity solution are very important for stimulation of high-salinity reservoirs. In this work, a novel thermal-resistant and shear-stable amphoteric polyacrylamide (PASD), prepared from acrylamide (AM), sodium styrene sulfonate (SSS), and acryloxyethyl trimethylammonium chloride (DAC) monomers, was prepared by free-radical polymerization in high-salinity solution. The amphoteric polyacrylamide was characterized by Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance spectroscopy (1H NMR), elemental analysis, thermogravimetric analysis (TG), and scanning electron microscopy (SEM). The amphoteric polyacrylamide exhibited excellent salinity tolerance. The slow increase in apparent viscosity of the polymer with increase in salinity was interesting. The amphoteric polyacrylamide showed perfect temperature resistance in high-salinity solution. The viscosity retention reached 38.9% at 120 °C and was restored to 87.8% of its initial viscosity when temperature was decreased to room temperature. The retention ratio of apparent viscosity reached 49.7% at 170 s−1and could still retain it at 25.8% at 1000 s−1. All these results demonstrated that PASD had excellent thermal-resistance and shear-stability in high-salinity solution. We expect that this work could provide a new strategy to design polymers with excellent salinity-tolerance, thermal-resistance, and shear-stability performances.Keywords:amphoteric polyacrylamide;high-salinity solution;thermal-resistance;shear-stability
研究领域:
化学工程
·
石油工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESIGNED MONOMERS AND POLYMERS
·
2013
·
IF 0.875
Y. Zou,Y.H. Zhang,P.X. He
Amphoteric terpolymers composed of acrylamide, 2-methylacryloylxyethyl trimethyl ammonium chloride, and 2-acrylamido-2-methyl-1-propane sulfonate were prepared via free-radical polymerization in aqueous solution of ammonium sulfate (AS), using poly(2-methylacryloylxyethyl trimethyl ammonium chloride) as stabilizer to yield terpolymers with random distributions. The particle size of the synthesized amphoteric polyacrylamide (AmPAM) ranged from 1 to 8 μm and the intrinsic viscosity ranged from 5.6 to 14.2 dL/g. The influences of aqueous solution of AS concentration, stabilizer concentration, initiator concentration, monomer concentration on the conversion of monomer, the intrinsic viscosity, and the particle size were systematically investigated. The characteristic of amphoteric polymer was also be studied. Throughout the study, we found that the isoelectric point of the amphoteric polyelectrolyte we synthesized is about 7. With the increase in sodium chloride, the reduced viscosity of AmPAM increased. Among the different type of inorganic salt, the degree of influence of anionic is I > Br > Cl.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Keru Hou,Kaili Jin,Zhuizhui Fan,Peibo Du,Yating Ji,Jun Wang,Yaping Zhao,Chengjian Yao,Zaisheng Cai
Special wettability fabrics-based membranes have shown excellent performance in emulsified oil/water separation, however, their application in separating industrial oil-in-water emulsions still remains a great challenge due to the complexity of multifarious surfactant components. In this work, we demonstrate a simple and facile approach to fabricate fabric-based membranes (P(AM-DMC-AA)@CFs) for complex emulsified oil/water (printing and dyeing wastewater) separation with combining the advantage of amphoteric polyacrylamide layer and cotton fabric in a single system. The amphoteric polyacrylamide surface and tortuous fabric channels synergistically provide the membranes with demulsification adjustability for separating emulsified oil in water which stabilized by anionic/cationic surfactants. Meanwhile, the incorporating of amphoteric polyacrylamide into cotton fabrics had remarkable advantages of both flexible and stable superhydrophilic/underwater superoleophobic. Consequently, the obtained P(AM-DMC-AA)@CFs membranes are endowed with robust superhydrophilicity, underwater superoleophobicity and switchable zeta potential , which make it capable of highly efficient separation of oil/water emulsion (anionic: 94.05%, cationic: 96.19%), suspension filtration (kaolin: 89.5%, hematite : 93.1%,) and concurrent dye removal in 5 min (14.3 mg/g). In addition, the prepared membrane is still effective in separating simulated printing and dyeing wastewater containing multiple pollutants. The facile and versatile design of the P(AM-DMC-AA)@CFs membrane offers new prospects for exploiting fabric-based membranes with extraordinary features for industrial oily wastewater treatment .
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 41
·e52981
·
IF 3.057
Wanfen Pu,Kaiping Tian,Hongzhou Wang
A low viscosity amphoteric polyacrylamide (LHPAM) was synthesized with Acrylamide and a Cationic etherifying agent. FTIR, SEM, and EDS all suggest that it successfully synthesized a new material. It can be demonstrated from TG and DSC that the temperature resistance of LHPAM is higher than that of partially hydrolyzed polyacrylamide (HPAM) and it can be found from ultraviolet–visible spectrophotometer that the flocculability of LHPAM is stronger than that of HPAM. The viscosity testing shows that the viscosity of LHPAM is greater than that of HPAM at the beginning, but the viscosity of LHPAM has been ultimately lower than that of HPAM after 1d. In addition, LHPAM reacts with Cr 3+ to form a gel with an interpenetrating network structure, while HPAM is a gel with a comb-shaped system, and the gelation time of LHPAM is longer than that of HPAM. However, the final gelation strength is the same. The final flow experiment shows that the plugging rates of LHPAM and HPAM are greater than 95%, but the resistance coefficient of LHPAM is smaller than that of HPAM. This study expands the application of HPAM in profile control and water shutoff, which is of great significance for enhanced oil recovery.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）