In this paper, we characterized at first, the rheological behavior of the bentonite suspensions and the aqueous solutions of PEO （polyethylene oxide）. Then we are going to investigate the influence of this polymer i...In this paper, we characterized at first, the rheological behavior of the bentonite suspensions and the aqueous solutions of PEO （polyethylene oxide）. Then we are going to investigate the influence of this polymer in a water-based drilling fluid model （6% of bentonite suspension）. The objective is to exhibit how the non-ionic polymer with molecular weight 6×10^3 g/mol, of varying concentration mass （0.7%, 1%, 2% and 3%） significantly alter the rheological properties （yield stress, viscosity, loss and elastic modulus） of the bentonite suspensions. The rheological measurements made in simple shear and in dynamic on the mixture （water-bentonite-PEO）, showed rheological properties of bentonite suspensions both in the presence and absence of non-ionic polymer. The PEO presents an affinity for the bentonite particles slowing down their kinetic aggregation. The analysis by XRD （X-rays diffraction） also allowed understanding the structure of this mixture. It had revealed the intercalation between of the clay platelets on one hand, and the links bridges assured by the chains of polymer between bentonite particles beyond a critical concentration in PEO on the other hand.展开更多
文摘In this paper, we characterized at first, the rheological behavior of the bentonite suspensions and the aqueous solutions of PEO （polyethylene oxide）. Then we are going to investigate the influence of this polymer in a water-based drilling fluid model （6% of bentonite suspension）. The objective is to exhibit how the non-ionic polymer with molecular weight 6×10^3 g/mol, of varying concentration mass （0.7%, 1%, 2% and 3%） significantly alter the rheological properties （yield stress, viscosity, loss and elastic modulus） of the bentonite suspensions. The rheological measurements made in simple shear and in dynamic on the mixture （water-bentonite-PEO）, showed rheological properties of bentonite suspensions both in the presence and absence of non-ionic polymer. The PEO presents an affinity for the bentonite particles slowing down their kinetic aggregation. The analysis by XRD （X-rays diffraction） also allowed understanding the structure of this mixture. It had revealed the intercalation between of the clay platelets on one hand, and the links bridges assured by the chains of polymer between bentonite particles beyond a critical concentration in PEO on the other hand.
