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压裂在非常觃油气开发过程中是常见的,压裂液的选择在整个施工过程中是重要的一环,压裂液的发展已经有几十年,但是目前的压裂液的耐温耐盐性能不够好,不够稳定。用合成四元耐盐聚合物(AADMC)作为水力压裂的稠化剂,引入2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和功能单体十六烷基二甲基烯丙基氯化铵(DMAAC)来增强聚合物的耐盐和耐温性,结果表明稠化剂浓度相同时,合成的AADMC比市场的PAM-10溶液表现出更好的表观黏度,在高矿化度下表现出比聚丙烯酰胺类PAM-10更好的耐盐型,在3.5%(wt)的含盐量条件下,依然保持较高的黏度。在160℃剪切120 min,黏度始终维持在50 mPa·s以上,满足160℃高温下使用。 相似文献
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为获得耐盐性能强、吸水倍率高的保水剂,以丙烯酸、丙烯酰胺和褐煤磺化腐植酸为原料,采用水溶液聚合法合成了褐煤磺化腐植酸型超强保水剂。通过正交试验分析交联剂N-N亚甲基双丙烯酰胺MBA、丙烯酰胺AM、引发剂过硫酸钾KPS、褐煤磺化腐植酸SHA、Na OH、丙烯酸AA和温度对保水剂吸水倍率和吸盐水倍率的影响,采用红外光谱、扫描电镜等对制备的褐煤磺化腐植酸保水剂的微观结构进行表征,分析超强保水剂的作用机理。结果表明,褐煤磺化腐植酸保水剂的最佳制备工艺条件为:交联剂MBA为0.0144 g、AM为0.1294 g、引发剂KPS为0.0231 g、SHA为0.1838 g、Na OH为1.1667 g、AA为0.3276 g、温度为85℃,此时保水剂的吸水倍率为2834 g/g,吸盐水倍率为135 g/g。褐煤磺化腐植酸保水剂表面呈现蜂窝状结构,且有序性较强;褐煤磺化腐植酸与高吸水性树脂分子链接枝到一起,磺酸基明显增加,褐煤磺化腐植酸参与聚合反应,说明制备的保水剂是化学键合型褐煤磺化腐植酸保水剂。 相似文献
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以丙烯酰胺(AM)、疏水单体烯丙基十二胺和耐盐单体H-66为原料,通过自由基水溶液聚合制备一种聚丙烯酰胺类聚合物RDTA。通过1H NMR和FTIR表征聚合物结构,通过表观黏度、SEM和流变性能测试研究了RDTA在不同溶液中的缔合效应和该缔合行为随温度变化的影响关系。实验结果表明,RDTA的临界缔合质量分数(W*)在0.25% ~ 0.3%。盐离子对RDTA高分子链的刺激作用能够增强该分子链的结构黏度。弹性模量G′随RDTA质量分数的增加而增大,溶液体系表现出弹性体,体系的空间结构更加密集。70℃、90℃和120℃,170 s-1剪切下,0.5% RDTA在6% NaCl盐溶液中剪切时间 < 300 s时,溶液黏度呈现缓慢上升趋势,说明RDTA在NaCl盐溶液中存在盐刺激RDTA溶液增稠的现象,继续剪切1 h后,剪切剩余黏度仍60 mPa·s以上。 相似文献
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采用丙烯酰胺,2-丙烯酰胺基-2-甲基丙磺酸和交联剂为N,N'-亚甲基双丙烯酰胺进行二元共聚,开展了以油井堵水为目的交联聚合物溶液体系研究,考察了单体的组成比例、单体质量分数、引发剂质量分数、反应温度、反应时间等对交联聚合物的影响,通过考察交联聚合物的成胶时间、凝胶强度来优化反应条件,并对所合成聚合物进行评价。结果表明,合成的交联共聚物耐温抗盐性良好,在矿化度5 000 mg/L模拟地层水中,吸水倍率为23倍左右,体积膨胀25倍左右,此外,封堵率也达到了98%左右。在90℃和110℃的高温下滚动老化24 h,交联聚合物仍保持良好的弹性和韧性,老化后吸水性吸水倍率分别为86.5和94.68,水化后其强度较好、富有弹性。 相似文献
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耐盐高吸水性树脂合成工艺研究 总被引:2,自引:0,他引:2
以丙烯酸为原料 ,采用自制酯作为共聚单体来提高吸水树脂的耐盐能力 ,采用溶液聚合法和反相乳液聚合法来制备高吸水性树脂 ,探讨简化工艺流程。产物最高吸水能力分别为 2 60 ,3 2 7g/g ,最高吸 1%盐水倍率为 5 4g/ g和 69g/ g。 相似文献
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Strongly water‐absorbing polymers based on the monomers acrylamide, potassium acrylate and magnesium methacrylate were prepared by copolymerization using ammonium persulfate as initiator and N,N‐methylene‐bisacrylamide (MBA) as crosslinking agent. The copolymers are synthesized by varying monomer, crosslinker and initiator concentrations. The experimental results shows that superabsorbents (SAPs) have good absorbency both in water and NaCl solutions. The copolymers are characterized by IR spectroscopy. Water retention in soil is enhanced by use of these superabsorbents. The SAPs use for the growth of sunflower plants is also investigated. The water retention capacity of the SAPs was carried out at 60 °C and 100 °C. Copyright © 2003 Society of Chemical Industry 相似文献
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A series of novel copolymer superabsorbents based on monomer acrylamide (AM), potassium methacrylate (KMA), and 2‐hydroxyethyl methacrylate (HEMA) were prepared by copolymerization using ammonium persulfate (APS) as an initiator and N,N‐methylenebisacrylamide (MBA) as a crosslinking agent. The synthetic variables (the monomer concentration, crosslinker concentration, and initiator concentration) were also studied. The experimental results of superabsorbent polymers (SAPs) show a better absorbency in both water and NaCl solutions. The copolymers were characterized by IR spectroscopy. The water retention in the soil was enhanced using the above superabsorbents. The use of SAPs for the growth of groundnut plants was also investigated. SAPs can be considered for water‐managing materials for agriculture and horticulture purposes in desert and drought‐prone areas. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 1795–1801, 2002 相似文献
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以丙烯酰胺(AM)、丙烯酸(AA)、N,N-亚甲基双丙烯酰胺(MBA)为单体,增强剂为填充料,合成了一种均质的网络结构的吸水树脂凝胶选择性堵水剂。结果表明,高吸水树脂凝胶的最佳配方为:单体配比AM∶AA∶MBA为1∶3∶8(质量比).交联剂用量为0.02%(占单体总质量的比例,下同),引发剂的用量为0.05%,增强剂的用量为5%,pH为9。该吸水树脂在常压下,吸盐水率可以达到140 g/g,吸水率可以达到600.2 g/g,堵水率大于80%,堵油率小于20%。产品具有较好的耐温抗盐性能和较好的选择性堵水能力。 相似文献
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干水(dry water)是微水滴颗粒被纳米级疏水性二氧化硅颗粒包覆层封装形成的、整体呈固体粉末状的粉体材料,其颗粒内含水量可高达98%,内部水分可以通过高温蒸发和外力挤压作用释放出来,是很有潜力的特种灭火新型材料。干水灭火剂的核心是功能性化学灭火组分,本文设计并制备了包覆不同功能性化学灭火组分的系列干水灭火剂,并测定表征了所制备干水灭火剂的粒径分布、流动性与保水性,研究了不同功能性化学灭火组分对干水灭火剂储运性能的影响。结果表明,不同功能性化学灭火组分的加入能够在一定程度上提高干水材料颗粒的流动性和保水性,其中磷酸二氢铵干水的流动性最优,氯化钠干水的保水效果最好。研究对干水灭火剂的制备、储运与使用具有重要意义。 相似文献
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水质稳定剂YSS-95的合成及性能研究 总被引:22,自引:4,他引:22
以异丙烯膦酸、丙烯酸和丙烯酸羟丙酯为单体,水熔剂,过硫酸铵为引发剂合成了异丙烯膦酸-丙烯-丙烯酸羟丙酯三元共聚物,并对其阻垢和缓蚀性能进行了评定。 相似文献
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A novel poly(acrylic acid)/attapulgite superabsorbent composite was synthesized by graft copolymerization reaction of acrylic acid (AA) on attapulgite micropowder using N,N′‐methylenebisacrylamide (MBA) as a crosslinker and ammonium persulfate (APS) as an initiator in aqueous solution. The effects on water absorbency of such factors as reaction temperature, initial monomer concentration, degree of neutralization of AA, amount of crosslinker, initiator, and attapulgite were investigated. These crosslinked superabsorbent composites were characterized by thermogravimetetric analysis and scanning electron microscopy. The graft copolymerization reaction of AA on attapulgite micropowder was characterized by FTIR. The water absorbencies for these superabsorbent composites in water and saline solutions were investigated and water‐retention tests were carried out. Results obtained from this study show that the water absorbency of the superabsorbent composite synthesized under optimal synthesis conditions with an attapulgite content of 10% exhibited an absorption of 1017 g H2O/g sample and 77 g H2O/g sample in distilled water and in 0.9 wt % NaCl solution, respectively. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 1596–1603, 2004 相似文献