中南大学学报（自然科学版）2016，Vol.47Issue(12)：4131-4139,9.DOI:10.11817/j.issn.1672-7207.2016.12.023
PAMAM树枝状聚合物抑制泥页岩水化膨胀和分散特性
Properties of PAMAM dendrimers in inhibiting shale hydration and dispersion
摘要
Abstract
Polyamidoamine (PAMAM) dendrimers were proposed as shale stabilizers based on shale hydration property and unique structure and characteristic of dendrimers. The inhibitive properties of polyamidoamine dendrimers ranging from G0 to G5 were evaluated with shale cuttings hot-rolling dispersion test, particle size distribution test, and bulk hardness test. The interaction between PAMAM dendrimers and clay was investigated via fourier transform infrared spectroscopy (FT-IR), X-ray(XRD) diffraction and transmission electron microscopy (TEM). The micro-mechanism was studied. A new water-based drilling fluid is established including G0 as shale hydration swelling inhibitor and G5 as shale hydration dispersion inhibitor. The results indicate that PAMAM dendrimers can inhibit shale hydration and dispersion efficiently, and are superior to conventional salt KCl and polyether amine. Reducing the pH of medium improves the inhibition to some degree. Different adsorption types are adopted for different generations of PAMAM dendrimers. G0 adopts monolayer adsorption, while the arrangement of G1, G2 and G3 molecules is affected by concentration. The molecules transfer from monolayer to bilayer as concentration increases. Because of large molecular mass, G4 and G5 are mainly adsorbed on the outer surface of clay due to steric hindrance. G0 can inhibit the hydration and swelling of internal surface of clay, and G5 can prevent the hydration and dispersion of clay particles. A synergistic stabilization effect can be obtained when G0 and G5 are used in combination. The drilling fluid is highly inhibitive, approaching the properties of oil-based drilling fluid.关键词
树枝状聚合物/聚酰胺胺/泥页岩水化/协同作用/抑制性Key words
dendrimer/polyamidoamine/shale hydration/synergistic effect/inhibition分类
能源科技引用本文复制引用
钟汉毅,邱正松,黄维安,张道明,孙栋..PAMAM树枝状聚合物抑制泥页岩水化膨胀和分散特性[J].中南大学学报（自然科学版）,2016,47(12):4131-4139,9.基金项目
山东省博士后创新项目专项资金资助项目(201303060)；中国博士后基金资助项目(2014M551986)；国家自然科学基金资助项目(51474235，51474236)；中央高校基本科研业务费专项资金资助项目(16CX02023A)(Project(201303060) supported by the Postdoctoral Innovative Program Foundation of Shandong Province （201303060）
Project(2014M551986) supported by the China Postdoctoral Science Foundation （2014M551986）
Projects(51474235,51474236) supported by the National Natural Science Foundation of China （51474235,51474236）
Project(16CX02023A) supported by the Fundamental Research Funds for the Central Universities) （16CX02023A）
