Due to the poor salt tolerance and heat resistance of the partially hydrolyzed acryl amide in the reservoir of high temperature and high inorganic salt,and the poor ability of shear,the hydrophobically associating ter...Due to the poor salt tolerance and heat resistance of the partially hydrolyzed acryl amide in the reservoir of high temperature and high inorganic salt,and the poor ability of shear,the hydrophobically associating terpolymers acrylamide\|hexadecyl ally ammonium chloride\|2\|acrylamino\|2\|metyl propane sulfuric acid (AM\|C 16 DMAAC\|AMPS) is prepared by micelle polymerization with the nonionic monomer\|AM,the anionic monomer\|AMPS,the cationic monomer\|C 16 DMAAC,It is investigated that the effect of the content of the hydrophobic monomer,anionic monomer,cationic monomer,reaction temperature and the concentration of the inorganic salt and the surfactant on the viscosity of the hydrophobically associating aqueous soluble terpolymers in brine.The results show that the aqueous soluble hydrophobically associating terpolymers(1000?mg/L) have good viscofication effect in brine(20000?mg/L),when the content of the hydrophobic monomer is 1\^2%,and of the anionic monomer is 30%,the hydrophobically associating terpolymers can meet the need of polymer flooding in reservoir of the high concentration inorganic salt.展开更多
A series of poly(N-isopropylacrylamide-co-methacryloyloxyethyl dimethyloctyl ammonium bromide) [P (NIPAM-co-ADMOAB)] hydrogels were prepared.The influences of the amount of ADMOAB in copolymeric gels on the swelling b...A series of poly(N-isopropylacrylamide-co-methacryloyloxyethyl dimethyloctyl ammonium bromide) [P (NIPAM-co-ADMOAB)] hydrogels were prepared.The influences of the amount of ADMOAB in copolymeric gels on the swelling behavior were investigated.The deswelling and reswelling kinetics were also studied.Results showed that the equilibrium swelling ratios (ESRs) of copolymeric gels increased with the enhanced ADMOAB content in the composition at temperatures below LCST,and the maximum ESR was 126 compared with a value of 28 for homopolymeric gel P(NIPAM),and the ESR for all copolymeric gels tended to zero independent of the composition when the temperature was above LCST.The rate constants in deswelling process increased at first and then decreased with increasing the ADMOAB amount,and the final water retention for copolymeric gels(about 1%) was much lower than that of P(NIPAM)(20%).The swelling ratios during reswelling process increased with the ADMOAB amount,and the diffusion of water into P(NIPAM-co-ADMOAB) gels was found to be a non-Fickian mode.Though decreased in saline solutions,swelling ratios for copolymeric gels were not significantly influenced by ionic strength with NaCl concentration from 0.1 to 0.3 mol/L and higher than those of homopolymeric gels in deionized water with the same swelling time.P(NIPAM-co-ADMOAB) hydrogels can be expected as good candidates for controlled drug delivery systems and separation processes.展开更多
文摘Due to the poor salt tolerance and heat resistance of the partially hydrolyzed acryl amide in the reservoir of high temperature and high inorganic salt,and the poor ability of shear,the hydrophobically associating terpolymers acrylamide\|hexadecyl ally ammonium chloride\|2\|acrylamino\|2\|metyl propane sulfuric acid (AM\|C 16 DMAAC\|AMPS) is prepared by micelle polymerization with the nonionic monomer\|AM,the anionic monomer\|AMPS,the cationic monomer\|C 16 DMAAC,It is investigated that the effect of the content of the hydrophobic monomer,anionic monomer,cationic monomer,reaction temperature and the concentration of the inorganic salt and the surfactant on the viscosity of the hydrophobically associating aqueous soluble terpolymers in brine.The results show that the aqueous soluble hydrophobically associating terpolymers(1000?mg/L) have good viscofication effect in brine(20000?mg/L),when the content of the hydrophobic monomer is 1\^2%,and of the anionic monomer is 30%,the hydrophobically associating terpolymers can meet the need of polymer flooding in reservoir of the high concentration inorganic salt.
文摘A series of poly(N-isopropylacrylamide-co-methacryloyloxyethyl dimethyloctyl ammonium bromide) [P (NIPAM-co-ADMOAB)] hydrogels were prepared.The influences of the amount of ADMOAB in copolymeric gels on the swelling behavior were investigated.The deswelling and reswelling kinetics were also studied.Results showed that the equilibrium swelling ratios (ESRs) of copolymeric gels increased with the enhanced ADMOAB content in the composition at temperatures below LCST,and the maximum ESR was 126 compared with a value of 28 for homopolymeric gel P(NIPAM),and the ESR for all copolymeric gels tended to zero independent of the composition when the temperature was above LCST.The rate constants in deswelling process increased at first and then decreased with increasing the ADMOAB amount,and the final water retention for copolymeric gels(about 1%) was much lower than that of P(NIPAM)(20%).The swelling ratios during reswelling process increased with the ADMOAB amount,and the diffusion of water into P(NIPAM-co-ADMOAB) gels was found to be a non-Fickian mode.Though decreased in saline solutions,swelling ratios for copolymeric gels were not significantly influenced by ionic strength with NaCl concentration from 0.1 to 0.3 mol/L and higher than those of homopolymeric gels in deionized water with the same swelling time.P(NIPAM-co-ADMOAB) hydrogels can be expected as good candidates for controlled drug delivery systems and separation processes.
