Colloidal Behavior of Aqueous Montmorillonite Suspensions in the Presence of Non-ionic Polymer

• 作者: Ahmed Allal Jean Charles Dupin Leila Saoudi Mourad Gareche Nadjet Azril Noureddine Zeraibi
• 来源期刊: 水利工程：英文版
• 学科: 工学
• 关键词: Bentonite PEO suspension rheology.
• 年，卷（期）: 2015,（1）
• 页码范围: 60-66
• 页数: 7页
• 分类号: TV

摘要

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.