乙醇胺对聚丙烯酰胺溶液黏度的影响

EFFECT OF ETHANOLAMINE ON THE VISCOSITY OF POLYACRYLAMIDESOLUTION

针对如何提高聚丙烯酰胺(HPAM)黏度的问题,考察了有机碱乙醇胺对HPAM黏度和渗流特征的影响。实验发现,乙醇胺对HPAM具有明显的增黏效果,随着热老化时间的延长,增黏效果越显著;乙醇胺可以提高HPAM的阻力系数和残余阻力系数,乙醇胺-HPAM体系具有更优的流度控制能力。此外,通过对乙醇胺-HPAM体系开展微量热,剪切流变和冷冻蚀刻电镜研究,发现乙醇胺与HPAM分子在溶液中存在较强的分子间相互作用,HPAM分子之间借助有机碱反离子形成松散的网络结构导致体系黏度增加。

Aimed to increase the visocosity of polyacrylamide （HPAM） solutions, influences of organic alkalineethanolamine on viscosity and percolation of HPAMwere investigated. Our results showed significant viscosity increasing effect when ethanolamine was added into HPAM solutions. Such effect becomesremarkablewith thermal aging. The ethanolamine-HPAM system exhibits higher resistance coefficient and residual resistance coefficient than single HPAM system, implying that the mobility control can be improved for ethanolamine-HPAM system. The interaction mechanism between HPAM and ethanolamine was studied using microealorimetry, shear rheology and freezeetching transmission electron microscopymethods. Strong intermolecular interaction was found. We proposed that loose network structure formed between HPAM molecules through organic alkalinecounter-ions leads to the viscosity increasing.