Synergistic effects of polymer and bentonite clay on rheology and thermal stability of foam fluid developed for hydraulic fracturing

2017 ◽  
Vol 12 (6) ◽  
pp. 872-883 ◽  
Author(s):  
Amit Verma ◽  
Geetanjali Chauhan ◽  
Keka Ojha
Keyword(s):  
Thermal Stability ◽  
Hydraulic Fracturing ◽  
Synergistic Effects ◽  
Bentonite Clay ◽  
Thermal Stability Of

scholarly journals Supramolecular exfoliation of layer silicate clay by novel cationic pillar[5]arene intercalants

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Takahiro Kakuta ◽  
Yudai Baba ◽  
Tada-aki Yamagishi ◽  
Tomoki Ogoshi
Keyword(s):  
Thermal Stability ◽  
Bentonite Clay ◽  
Layered Material ◽  
Inorganic Materials ◽  
Layer Silicate ◽  
Poly Ethylene Glycol ◽  
Silicate Clay ◽  
Poly Ethylene ◽  
Thermal Stability Of ◽  
Complete Exfoliation

AbstractClays are multi-layered inorganic materials that can be used to prepare nanocomposite fillers. Because the multi-layered structure is thermodynamically stable, it is difficult to change a multi-layered material into single layers to improve its dispersity. Previously, clays were modified with dodecylammonium cations to promote complexation with nylon 6, nylon 66, polypropylene, polyethylene, polystyrene, and polycaprolactone to increase the mechanical strength (and/or thermal stability) of the composite material; however, complete exfoliation could not be achieved in these composites. In this study, pillar[5]arenes are synthesized and functionalized with ten cationic substituents as novel intercalants for modifying bentonite clay, which is a multi-layered metal-cation-containing silicate. The pillar[5]arenes exfoliate the clay by forming polyrotaxanes with poly(ethylene glycol) through host–guest interactions.

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