一种非离子疏水缔合聚丙烯酰胺的合成及性能评价
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摘要
为了开发一种速溶性非离子疏水缔合聚合物,将易水溶的非离子表面活性剂型疏水单体十八烷基聚乙二醇1100甲基丙烯酸酯与丙烯酰胺共聚反应得到一种非离子型疏水缔合聚丙烯酰胺,采用核磁共振氢谱分析了合成聚合物的结构,利用激光光散射仪测定了合成聚合物的相对分子质量,并考察了合成聚合物的增黏性和耐温耐剪切性能。研究表明,所合成的二元共聚物的相对分子质量为3.18×10~6g/mol,黏度法测得的临界缔合浓度约为0.23%,SDS能显著提高溶液黏度。在剪切速率170 s~(-1)下,质量分数0.4%的合成聚合物溶液,在50数90℃下,由于疏水缔合作用的增强,黏度有明显上升;随温度进一步升高,黏度下降;在150℃下剪切30 min后的黏度仍高于50 mPa·s。扫描电镜分析表明,聚合物在常温下形成的网状结构较高温的致密。所合成的疏水缔合聚合物有作为压裂液增稠剂使用的应用前景。图6参13
In order to develop a fast-soluble nonionic hydrophobic associative polymer,a water-soluble nonionic surfactant-type hydrophobic monomer,octadecyl polyethylene glycol 1100 methacrylate,was copolymerized with acrylamide at 55℃. The polymer was successfully proved by using ~1H NMR. The molecular weight was measured by static light scattering,and the performance of the viscosity increasing,heat resistance and salt tolerance of the obtained polymer was measured. The results showed that the molecular weight of the polymer was 3.18×10~6 g/mol and the critical association concentration was determined to be about 0.23% by the viscosity method,the addition of SDS would increase the viscosity of the solution obviously. The viscosity of 0.4% polymer solution was increased significantly at a shear rate of 170 s~(-1). when the temperature increasing from 50℃ to 90℃,due to the enhanced hydrophobic association;and the viscosity decreased with increasing temperature. The viscosity was still higher than 50 mPa·s after sheared for 30 min at the temperature of 150℃,which indicated that the obtained polymer had good heat resistant and salt tolerant performance. Scanning electron microscopy analysis showed that the network formed at room temperature was denser than at 100℃. The obtained hydrophobically associated polyacrylamide has potential applications as a thickener of fracturing fluid.
In order to develop a fast-soluble nonionic hydrophobic associative polymer,a water-soluble nonionic surfactant-type hydrophobic monomer,octadecyl polyethylene glycol 1100 methacrylate,was copolymerized with acrylamide at 55℃. The polymer was successfully proved by using ~1H NMR. The molecular weight was measured by static light scattering,and the performance of the viscosity increasing,heat resistance and salt tolerance of the obtained polymer was measured. The results showed that the molecular weight of the polymer was 3.18×10~6 g/mol and the critical association concentration was determined to be about 0.23% by the viscosity method,the addition of SDS would increase the viscosity of the solution obviously. The viscosity of 0.4% polymer solution was increased significantly at a shear rate of 170 s~(-1). when the temperature increasing from 50℃ to 90℃,due to the enhanced hydrophobic association;and the viscosity decreased with increasing temperature. The viscosity was still higher than 50 mPa·s after sheared for 30 min at the temperature of 150℃,which indicated that the obtained polymer had good heat resistant and salt tolerant performance. Scanning electron microscopy analysis showed that the network formed at room temperature was denser than at 100℃. The obtained hydrophobically associated polyacrylamide has potential applications as a thickener of fracturing fluid.
引文
[1] XIE K,LU X G,LI Q,et al. Analysis of reservoir applicability of hydrophobically associating polymer[J]. SPE J,2016,21(1):1-9.
[2] TAYLOR K C, NASR-EL-DIN H A. Water-soluble hydrophobically associating polymers for improved oil recovery:A literature review[J]. J Petrol Sci Eng,1998,19(3-4):265-280.
[3] LAI N,WAN D,YE Z,et al. A water-soluble acrylamide hydrophobically associating polymer:synthesis,characterization,and properties as EOR chemical[J]. J Appl Polym Sci,2013,129(4):1888-1896.
[4] TAYLOR K C,NASR-EL-DIN H A. Hydrophobically associating polymers for oil field applications[C].//Canadian International Petroleum Conference. Petroleum Society of Canada,2007.
[5] CAO P F,MANGADLAO J D,ADVINCULA R C. Stimuliresponsive polymers and their potential applications in oil-gas industry[J]. Polym Rev,2015,55(4):706-733.
[6]陈洪,韩利娟,徐鹏,等.疏水改性聚丙烯酰胺的增黏机理研究[J].物理化学学报,2003,19(11):1020-1024.
[7] ZHU Z,JIAN O,PAILLET S,et al. Hydrophobically modified associating polyacrylamide(HAPAM)synthesized by micellar copolymerization at high monomer concentration[J]. Eur Polym J,2007,43(3):824-834.
[8]赵庆美,赵林,马超. AM/AA/SMA疏水缔合压裂液稠化剂的研究[J].钻井液与完井液,2017(1):116-121.
[9] YANG X,LIU J,LI P,et al. Self-assembly properties of hydrophobically associating perfluorinated polyacrylamide in dilute and semi-dilute solutions[J]. J Polym Res,2015,22(6):1-7.
[10]耿同谋.疏水缔合水溶性聚合物P(AM/NaAA/DiAC16)水溶液的黏度行为[J].精细化工,2007,24(9):914-918.
[11] LU H S,LIU Y,WANG B G,et al. Self-assembling transition behavior of a hydrophobic associative polymer based on counterion and pH effects[J]. Colloid Surface A,2016,490:1-8.
[12] YAN Q,YUAN J,CAI Z,et al. Voltage-responsive vesicles based on orthogonal assembly of two homopolymers[J]. J Am Chem Soc,2010,132(27):9268-9270.
[13] LU H S,ZHENG C C,WANG L,et al. Endowing a cationic hydrophobic associating polyacrylamide solution with CO2switchable properties using N,N-dimethylolamidopropylamine via the assembly transition between vesicles and spherical micelles by CO2[J]. RSC Adv,2016,6(110):108440-108447.
[2] TAYLOR K C, NASR-EL-DIN H A. Water-soluble hydrophobically associating polymers for improved oil recovery:A literature review[J]. J Petrol Sci Eng,1998,19(3-4):265-280.
[3] LAI N,WAN D,YE Z,et al. A water-soluble acrylamide hydrophobically associating polymer:synthesis,characterization,and properties as EOR chemical[J]. J Appl Polym Sci,2013,129(4):1888-1896.
[4] TAYLOR K C,NASR-EL-DIN H A. Hydrophobically associating polymers for oil field applications[C].//Canadian International Petroleum Conference. Petroleum Society of Canada,2007.
[5] CAO P F,MANGADLAO J D,ADVINCULA R C. Stimuliresponsive polymers and their potential applications in oil-gas industry[J]. Polym Rev,2015,55(4):706-733.
[6]陈洪,韩利娟,徐鹏,等.疏水改性聚丙烯酰胺的增黏机理研究[J].物理化学学报,2003,19(11):1020-1024.
[7] ZHU Z,JIAN O,PAILLET S,et al. Hydrophobically modified associating polyacrylamide(HAPAM)synthesized by micellar copolymerization at high monomer concentration[J]. Eur Polym J,2007,43(3):824-834.
[8]赵庆美,赵林,马超. AM/AA/SMA疏水缔合压裂液稠化剂的研究[J].钻井液与完井液,2017(1):116-121.
[9] YANG X,LIU J,LI P,et al. Self-assembly properties of hydrophobically associating perfluorinated polyacrylamide in dilute and semi-dilute solutions[J]. J Polym Res,2015,22(6):1-7.
[10]耿同谋.疏水缔合水溶性聚合物P(AM/NaAA/DiAC16)水溶液的黏度行为[J].精细化工,2007,24(9):914-918.
[11] LU H S,LIU Y,WANG B G,et al. Self-assembling transition behavior of a hydrophobic associative polymer based on counterion and pH effects[J]. Colloid Surface A,2016,490:1-8.
[12] YAN Q,YUAN J,CAI Z,et al. Voltage-responsive vesicles based on orthogonal assembly of two homopolymers[J]. J Am Chem Soc,2010,132(27):9268-9270.
[13] LU H S,ZHENG C C,WANG L,et al. Endowing a cationic hydrophobic associating polyacrylamide solution with CO2switchable properties using N,N-dimethylolamidopropylamine via the assembly transition between vesicles and spherical micelles by CO2[J]. RSC Adv,2016,6(110):108440-108447.