共查询到17条相似文献,搜索用时 343 毫秒
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二氧化氯对聚丙烯酰胺降解作用的实验研究 总被引:1,自引:0,他引:1
随着三次采油技术的不断发展,油井堵塞问题越来越严重。主要研究了不同浓度的二氧化氯对聚丙烯酰胺的降解作用,以及温度对其影响,并对二氧化氯降解聚丙烯酰胺的机理进行了探讨。主要测定在6 h内,随着时间的变化,不同温度及不同二氧化氯浓度下聚丙烯酰胺的黏度,以此来判定二氧化氯对聚丙烯酰胺的降解效果。结果表明:在室温下,降解2%(质量分数)的聚丙烯酰胺溶液的最佳二氧化氯质量分数为4×10-3;当二氧化氯质量分数为4×10-3时,降解2%(质量分数)的聚丙烯酰胺溶液的最佳温度为60 ℃。 相似文献
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介绍了聚丙烯酰胺的特性、应用及其潜在危害,分析了油田含聚污水的特点和污染现状。总结了生物降解聚丙烯酰胺的机理和国内外关于生物降解聚丙烯酰胺的研究进展,阐述了目前微生物降解存在的问题及未来发展趋势。 相似文献
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采用分散聚合法合成的阳离子聚丙烯酰胺是一种应用广泛、效果良好的水处理药剂。介绍了分散聚合法制备阳离子聚丙烯酰胺的研究进展,探讨了阳离子聚丙烯酰胺的絮凝机理以及分散聚合法制备的阳离子聚丙烯酰胺的应用,并提出了今后合成研究的重点发展方向。 相似文献
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《国际聚合物材料杂志》2012,61(3-4):177-193
Abstract This review presents some aspects of mechanical, thermal-oxidative and biological degradation of polyacrylamide in aqueous-saline solutions and methods of its prevention. 相似文献
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天然纤维素基生物降解塑料研究进展 总被引:1,自引:0,他引:1
综述了纤维素基生物降解塑料共混法、化学改性法及微生物法三种典型制备方法,介绍了C02释放量检测、生物降解半衰期检测、生物降解塑料分子量检测、微生物侵蚀形貌观察及生物降解性能指标检测等生物降解性评价机制。纤维素基生物降解塑料是未来新材料发展的重要领域,将会朝着低成本、广应用、降解速度可控和完全降解的方向发展。 相似文献
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Mechanical stability of high‐molecular‐weight polyacrylamides and an (acrylamido tert‐butyl sulfonic acid)–acrylamide copolymer used in enhanced oil recovery 下载免费PDF全文
Abdul‐Aziz Al‐Hashmi Rashid Al‐Maamari Ibtisam Al‐Shabibi Ahmed Mansoor Hamed Al‐Sharji Alain Zaitoun 《应用聚合物科学杂志》2014,131(20)
High‐molecular‐weight partially hydrolyzed and sulfonated polyacrylamides are widely used in enhanced oil recovery (EOR). Nonionic polyacrylamide and polyacrylamide‐based microgels are also used in water shut‐off treatments for gas and oil wells. A comparative study of the mechanical degradation for three linear polyacrylamides and a microgel is presented. Mechanical degradation is quantified from the loss of the viscosity of the polymer solution as it passes through a stainless steel capillary with a length of 10 cm and an internal diameter of 125 µm. The critical shear rate above which degradation increases exponentially was found to depend on the chemical structure of the polymer, molecular weight, and electrolyte strength. The nonionic polyacrylamide shows higher degradation and lower critical shear rate compared with a sulfonated polyacrylamide with similar molecular weight. Moreover, the nonionic polyacrylamide with a higher molecular weight results in lower mechanical degradation. The higher mechanical stability of the sulfonated polymer is attributed to the higher rigidity of its molecules in solution. On the other hand, the ability of the high‐molecular‐weight polymers to form transient, flow‐induced microgels boost their mechanical stability. This ability increases with the increase in the molecular weight of the polymer. Indeed, the microgel solution used in this study demonstrates exceptional mechanical stability. In general, mechanical stability of linear polymers used in chemical enhanced oil recovery can be enhanced by tailoring a polymer that has large side groups similar to the sulfonated polyacrylamide. Also, polyacrylamide‐based microgels can be applied if high mechanical stability is required. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40921. 相似文献