Performance of cationic β‐cyclodextrin as a clay stabilizer for use in enhanced oil recovery

Abstract

In this study, a novel cationic cyclodextrin polymer was prepared by the polymerization reaction between allyl‐β‐cyclodextrin (A‐β‐CD) and acrylamide (AM), acrylic acid (AA), and diallyl benzyl propyl ammonium chloride (DABPAC) (A‐β‐CD/AM/AA/DABPAC). The cationic β‐cyclodextrin polymer was structurally characterized using FTIR and 1H NMR. On bases of XRD and SEM analyses, the possibility of interaction between polymer and clay surfaces was suggested. The layer formed around the clay surfaces apparently performed as a double protective layer preventing clay swelling and its molecular migration.

Study on Acidizing Effect of Cationic β-Cyclodextrin Inclusion Complex with Sandstone for Enhancing Oil Recovery

“…The inclusion complex N-β-CD could adsorb onto the negatively charged clay surfaces by virtue of bearing a strong electrostatic attraction and weak hydrogen-bonding adsorption. Besides, the N-β-CD, which possesses a large number of hydrophobic cavities of β-CD, could form a double protective layer against the ingress of water to prevent clay swelling and migration . Moreover, resulting from the weak hydrogen bonds of HEDP, the N-β-CD–HEDP and physical mixture with HEDP and N-β-CD show only a little better performance than N-β-CD.…”

“…For the well-established ability of β-cyclodextrin (β-CD) to bind other molecules, β-CD derivatives with quaternary ammonium salt cations can act as a more efficient clay stabilizer. , In addition to the ability of generating host/guest inclusion complexes, β-CD also can selectively incorporate with other molecules as the guest into its cavity. − The host/guest theory implies that host β-CD molecules can not only recognize molecules but also self-assemble and release guest molecules, which opens a new direction for the research and development of special functional materials. , However, little information has focused on including organic phosphoric acids with cationic β-CD derivatives.…”

Influence of Nanoparticles and Surfactants on Stability and Rheological Behavior of Polymeric Nanofluids and the Potential Applications in Fracturing Fluids

“…32,37 The cationic groups in the long chain quaternary ammonium salt significantly reduce the damage of the polymer to the reservoir and inhibit clay hydration expansion and migration, while the hydrophobic long chains enhance the synergistic effect of anionic and cationic materials among the polymer molecules and improve the thickening effect of the solution. 38,39 The polymeric nanofluids form by the combination of nanoparticles, and polymers exhibited excellent properties. To investigate the effects of nanoparticles and surfactants on the polymer solution, HPAM, HPAM/SDS, HPAM/nanoparticles (NPs), and HPAM/ SDS/NPs, four kinds of solution, were prepared.…”

“…The fracture temperature of C–C main chain structure in the AM-SA-C 18 DMAAC is high, so the thermal stability and temperature resistance of the polymer are improved. , Also, the polymer with C–C bonds as the main chain has good bacterial corrosion resistance . Amide groups generate carboxyl groups after hydrolysis to enhance the solubility of the polymer and form a water-soluble cross-linked polymer. , The cationic groups in the long chain quaternary ammonium salt significantly reduce the damage of the polymer to the reservoir and inhibit clay hydration expansion and migration, while the hydrophobic long chains enhance the synergistic effect of anionic and cationic materials among the polymer molecules and improve the thickening effect of the solution. , …”

Poly(epsilon caprolactone)/clay nanocomposites via host–guest chemistry

“…The host-guest chemistry provides a valuable platform for the synthesis of various supramolecular macromolecular architectures [39] including stars [40], hydrogels [41], polymer brushes [42] with other molecules and polymers [43][44][45]. There are few reports on the preparation of organomodified clays containing cyclodextrin units in the literature [46][47][48][49][50][51][52][53]. However, in these study only inclusion complexes with various low-molecular-weight compounds such as benzene [50], benzoic acid [46], toluene [46,49,50], cetylpyridinium chloride [47], crystal violet [48], ethylbenzene [50], menthone [49], mimonene [49], naphthalene [50] pyrene [52], tetrachloroethylene [50], 1,2,3trichlorobenzene [50], trichloroethylene [50] and o-xylene [50] were investigated.…”