State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Xindu, Chengdu, Sichuan 610500, People's Republic of China.
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Xindu, Chengdu, Sichuan 610500, People's Republic of China.
Carbohydr Polym. 2020 Apr 15;234:115915. doi: 10.1016/j.carbpol.2020.115915. Epub 2020 Jan 24.
Nanosilica, multiwalled carbon nanotubes and graphite powder have different effects on guar gum fracturing fluid because of the different morphologies of these nanomaterials. The results showed that the apparent viscosity, temperature tolerance, elastic modulus and tensile strength of nano-hybrid guar gum fracturing fluids were improved by nanomaterials compared to those properties of blank fracturing fluid (without nanomaterials). However, microscopic analysis by SEM and TEM revealed that different nanomaterials played different roles in the network structure of guar gum fracturing fluid. In terms of micro particle size, modified nano-SiO (M-NS) played a nuclear point and skeleton role in the fracturing fluid and obviously enhanced the network structure. Hydroxylated multiwalled carbon nanotubes (MWNTs-OH) and guar gum macromolecular chains were intertwined. Graphene oxide (GO) intercalation entered the guar gum molecular chain and the interaction was relatively weak because of its sheet structure.
纳米二氧化硅、多壁碳纳米管和石墨粉由于形态不同，对胍胶压裂液具有不同的作用。结果表明，纳米复合材料使纳米混合胍胶压裂液的表观黏度、耐温性、弹性模量和拉伸强度均优于空白压裂液（无纳米材料）。然而，通过扫描电子显微镜和透射电子显微镜的微观分析发现，不同的纳米材料在胍胶压裂液的网络结构中发挥了不同的作用。就微观颗粒尺寸而言，改性纳米二氧化硅（M-NS）在压裂液中起到核点和骨架的作用，明显增强了网络结构。经羟基化修饰的多壁碳纳米管（MWNTs-OH）与胍胶大分子链相互缠绕。氧化石墨烯（GO）的层状结构使其易于插入胍胶分子链中，但相互作用较弱。
