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首页> 外文期刊>Journal of Applied Polymer Science >Study on Strength and Gelation Time of Polyacrylamide/Polyethyleneimine Composite Gels Reinforced with Coal Fly Ash for Water Shut-Off Treatment
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Study on Strength and Gelation Time of Polyacrylamide/Polyethyleneimine Composite Gels Reinforced with Coal Fly Ash for Water Shut-Off Treatment

机译：粉煤灰增强隔水处理聚丙烯酰胺/聚乙烯亚胺复合凝胶的强度和胶凝时间的研究

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摘要

This study investigates the influence of coal fly ash (CFA) as a reinforcing material on the strength and the gelation of polyacrylamide (PAM)/polyethyleneimine (PEI) composite gels. Pure PAM/PEI gel and PAM/PEI gels containing CFA up to 2 wt % were synthesized via the cross-linking reaction between PAM and PEI solutions at room temperature (25 degrees C) in distilled water dispersed with CFA. The strength of each composite gel was measured at temperature of 80 degrees C, while the gelation was determined from 80 degrees C to 95 degrees C. Rheological measurements indicated that the strength of PAM/PEI composite gels filled with CFA contents was significantly rigid and stronger than that of pure PAM/PEI gel as a result of the enhanced interfacial interaction of well-dispersed CFA contents in PAM/PEI gel matrix. The gelation times of PAM/PEI gels containing CFA up to 2 wt % deviated from the gelation time of pure PAM/PEI gel. It was further observed that an increase in temperature resulted in a decrease in gelation time of PAM/PEI gel containing 2 wt % CFA. The scanning electron microscopy revealed the surface micrographs of PAM/PEI gels filled with CFA to be very dense without any noticeable micropores. The micropores were absent as scanning was performed on the dried composite gels. It also establishes the strong interaction between CFA and PAM/PEI gel matrix. Experimental findings showed that PAM/PEI composite gels reinforced with CFA are potential candidates for total water shut-off treatment in oilfields. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41392.
机译：这项研究调查了粉煤灰（CFA）作为增强材料对聚丙烯酰胺（PAM）/聚乙烯亚胺（PEI）复合凝胶的强度和凝胶化的影响。在室温下（25摄氏度）下，在分散有CFA的蒸馏水中，通过PAM和PEI溶液之间的交联反应，可以合成纯PAM / PEI凝胶和CFA含量高达2 wt％的PAM / PEI凝胶。在80摄氏度的温度下测量每种复合凝胶的强度，而在80摄氏度至95摄氏度下测定凝胶化。流变学测量表明，填充有CFA含量的PAM / PEI复合凝胶的强度显着刚性强与纯PAM / PEI凝胶相比，PAM / PEI凝胶基质中分散的CFA含量增强了界面相互作用。含CFA高达2 wt％的PAM / PEI凝胶的凝胶化时间与纯PAM / PEI凝胶的凝胶化时间不同。进一步观察到，温度升高导致包含2 wt％CFA的PAM / PEI凝胶的胶凝时间减少。扫描电子显微镜显示填充有CFA的PAM / PEI凝胶的表面显微照片非常致密，没有任何明显的微孔。由于在干燥的复合凝胶上进行扫描，因此没有微孔。它还建立了CFA和PAM / PEI凝胶基质之间的强相互作用。实验结果表明，用CFA增强的PAM / PEI复合凝胶是油田全断水处理的潜在候选者。 （c）2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41392。

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