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Rheological properties of an ultra-high salt hydrophobic associated polymer as a fracturing fluid system

机译：超高盐疏水缔合聚合物作为压裂液体系的流变特性

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摘要

Herein, a novel ultra-high salt hydrophobic associated polymer, UUCPAM, was prepared using acrylamide, acrylic acid, 2-acrylamide-2-methyl propane sulfonic acid and the hydrophobic monomer UUC. Polymerization exothermic test results indicated that the increase in the hydrophobic monomer content led to an increase in the exothermic time, which is considerably conducive to the formation of hydrophobic structures. The scanning electron microscopy and transmission electron microscopy studies showed that the polymer had complex network structures and that this phenomenon was considerably obvious in NaCl solution. The fluorescence probe experiment verified that the critical association concentration of this polymer decreased with an increase in the hydrophobic monomer. Rheology studies indicated that the polymer had good temperature and shear resistance in NaCl solution. Moreover, the apparent viscosity of the polymer remained above 80 mPa s when 0.3 wt% UUCPAM was added at 170 s ~(?1) in 20?000 mg L ~(?1) NaCl solution at 90 °C. The storage modulus that indicated strong elasticity increased with an increase in the polymer concentration. Meanwhile, the number of hydrophobic micro-zones increased, thus forming dense network structures. Therefore, the polymer was found to have excellent salt resistance and extensive application prospects.
机译：本文中，使用丙烯酰胺，丙烯酸，2-丙烯酰胺-2-甲基丙烷磺酸和疏水性单体UUC制备了新型的超高盐疏水缔合聚合物UUCPAM。聚合放热测试结果表明，疏水单体含量的增加导致放热时间的增加，这大大有利于疏水结构的形成。扫描电子显微镜和透射电子显微镜研究表明该聚合物具有复杂的网络结构，并且该现象在NaCl溶液中相当明显。荧光探针实验证实该聚合物的临界缔合浓度随疏水性单体的增加而降低。流变学研究表明该聚合物在NaCl溶液中具有良好的温度和抗剪切性。此外，当在90℃下在170？s（？1）的20？000 mg L〜（？1）NaCl溶液中加入0.3 wt％UUCPAM时，聚合物的表观粘度保持在80 mPa s以上。表示强弹性的储能模量随着聚合物浓度的增加而增加。同时，疏水微区的数量增加，从而形成致密的网络结构。因此，发现该聚合物具有优异的耐盐性和广阔的应用前景。

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