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Dong S, Li L, Wu Y, Huang X, Wang X. Preparation and Study of Polyvinyl Alcohol Gel Structures with Acrylamide and 2-Acrylamido-2-methyl-1-propanesulfonic Acid for Application in Saline Oil Reservoirs for Profile Modification. ACS Appl Mater Interfaces 2023. [PMID: 36883961 DOI: 10.1021/acsami.2c22911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Polymer gels can be effectively applied to plug fractured reservoirs and carbonate cave strata. Herein, polyvinyl alcohol (PVA), acrylamide, and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) were used as raw materials to prepare interpenetrating three-dimensional network polymer gels using formation saltwater in the Tahe oilfield (Tarim Basin, NW China) as a solvent. The effect of AMPS concentration on the gelation properties of PVA in high-temperature formation saltwater was analyzed. Further, the effect of PVA concentration on the strength and viscoelastic properties of polymer gel was studied. The polymer gel could retain stable continuous entanglement at 130 °C and exhibited satisfactory thermal stability. Continuous step oscillation frequency tests showed that it exhibited an excellent self-healing performance. Scanning electron microscopy images of the simulated core by gel plugging showed that the polymer gel could firmly fill the porous media, indicating that the polymer gel exhibits excellent application prospects in oil and gas reservoirs under high-temperature and high-salinity conditions.
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Affiliation(s)
- Shuyang Dong
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources & Key Laboratory of Cleaner Transition of Coal and Chemicals Engineering, College of Chemical Engineering, Xinjiang University, Urumqi 830017, Xinjiang, China
| | - Liang Li
- Key Laboratory for EOR of Carbonate Fractured Vuggy Reservoir, SINOPEC, Urumqi 830011, Xinjiang, China
| | - Yajun Wu
- Key Laboratory for EOR of Carbonate Fractured Vuggy Reservoir, SINOPEC, Urumqi 830011, Xinjiang, China
| | - Xueli Huang
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources & Key Laboratory of Cleaner Transition of Coal and Chemicals Engineering, College of Chemical Engineering, Xinjiang University, Urumqi 830017, Xinjiang, China
| | - Xuefeng Wang
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources & Key Laboratory of Cleaner Transition of Coal and Chemicals Engineering, College of Chemical Engineering, Xinjiang University, Urumqi 830017, Xinjiang, China
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Tsai MJ, Liao KS, Wu JY. A Water-Stable 2-Fold Interpenetrating cds Net as a Bifunctional Fluorescence-Responsive Sensor for Selective Detection of Cr(III) and Cr(VI) Ions. Nanomaterials (Basel) 2022; 12:nano12010158. [PMID: 35010108 PMCID: PMC8746465 DOI: 10.3390/nano12010158] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/23/2021] [Accepted: 01/01/2022] [Indexed: 02/07/2023]
Abstract
Reactions of ZnSO4∙7H2O, N-(pyridin-3-ylmethyl)-4-(pyridin-4-yl)-1,8-naphthalimide (NI-mbpy-34), and 5-bromobenzene-1,3-dicarboxylic acid (Br-1,3-H2bdc) afforded a luminescent coordination polymer, [Zn(Br-1,3-bdc)(NI-mbpy-34)]n (1), under hydro(solvo)thermal conditions. Single-crystal X-ray structure analysis revealed that 1 features a three-dimensional (3-D) 2-fold interpenetrating cds (or CdSO4) net topology with the point symbol of (65·8), where the Zn(II) centers are considered as 4-connected square-planar nodes. X-ray powder diffraction (XRPD) patterns and thermogravimetric (TG) analysis confirmed that 1 shows high chemical and thermal stabilities. Notably, 1 displayed solvent dependent photoluminescence properties; the fluorescence intensity and emission maximum of 1 in different solvent suspensions varied when a solvent was changed. Furthermore, the H2O suspension of 1 exhibited blue fluorescence emission and thus can be treated as a selective and sensitive fluorescent probe for turn-on detection of Cr3+ cations through absorbance caused enhancement (ACE) mechanism and turn-off detection of Cr2O72−/CrO42− anions through collaboration of the absorption competition and energy transfer process, with limit of detection (LOD) as low as μM scale.
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Lan W, Zhou Z, Jia FC, Hao X, Dou Y, Yang L, Liu H, Liu Q, Zhang D. A new three-dimensional cobalt(II) coordination polymer based on V-shaped 3,4'-oxydibenzoate: synthesis, crystal structure and magnetic properties. Acta Crystallogr C Struct Chem 2019; 75:990-995. [PMID: 31271389 DOI: 10.1107/s2053229619008337] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 06/12/2019] [Indexed: 11/10/2022] Open
Abstract
A new coordination polymer (CP), namely poly[(μ-4,4'-bipyridine)(μ3-3,4'-oxydibenzoato)cobalt(II)], [Co(C14H8O5)(C10H8N2)]n or [Co(3,4'-obb)(4,4'-bipy)]n (1), was prepared by the self-assembly of Co(NO3)2·6H2O with the rarely used 3,4'-oxydibenzoic acid (3,4'-obbH2) ligand and 4,4'-bipyridine (4,4'-bipy) under solvothermal conditions, and has been structurally characterized by elemental analysis, IR spectroscopy, single-crystal X-ray crystallography and powder X-ray diffraction (PXRD). Single-crystal X-ray diffraction reveals that each CoII ion is six-coordinated by four O atoms from three 3,4'-obb2- ligands, of which two function as monodentate ligands and the other as a bidentate ligand, and by two N atoms from bridging 4,4'-bipy ligands, thereby forming a distorted octahedral CoN2O4 coordination geometry. Adjacent crystallographically equivalent CoII ions are bridged by the O atoms of 3,4'-obb2- ligands, affording an eight-membered Co2O4C2 ring which is further extended into a two-dimensional [Co(3,4'-obb)]n sheet along the ab plane via 3,4'-obb2- functioning as a bidentate bridging ligand. The planes are interlinked into a three-dimensional [Co(3,4'-obb)(4,4'-bipy)]n network by 4,4'-bipy ligands acting as pillars along the c axis. Magnetic investigations on CP 1 disclose an antiferromagnetic coupling within the dimeric Co2 unit and a metamagnetic behaviour at low temperature resulting from intermolecular π-π interactions between the parallel 4,4'-bipy ligands.
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Affiliation(s)
- Wenlong Lan
- College of Chemical and Chemical Engineering, Shandong University of Technology, Zibo 255049, People's Republic of China
| | - Zhen Zhou
- College of Chemical and Chemical Engineering, Shandong University of Technology, Zibo 255049, People's Republic of China
| | - Fu Chao Jia
- School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255049, People's Republic of China
| | - Xiaoyun Hao
- College of Chemical and Chemical Engineering, Shandong University of Technology, Zibo 255049, People's Republic of China
| | - Yong Dou
- College of Chemical and Chemical Engineering, Shandong University of Technology, Zibo 255049, People's Republic of China
| | - Lu Yang
- College of Chemical and Chemical Engineering, Shandong University of Technology, Zibo 255049, People's Republic of China
| | - Hui Liu
- College of Chemical and Chemical Engineering, Shandong University of Technology, Zibo 255049, People's Republic of China
| | - Qingyun Liu
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266510, People's Republic of China
| | - Daopeng Zhang
- College of Chemical and Chemical Engineering, Shandong University of Technology, Zibo 255049, People's Republic of China
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Essel TYA, Koomson A, Seniagya MPO, Cobbold GP, Kwofie SK, Asimeng BO, Arthur PK, Awandare G, Tiburu EK. Chitosan Composites Synthesized Using Acetic Acid and Tetraethylorthosilicate Respond Differently to Methylene Blue Adsorption. Polymers (Basel) 2018; 10:E466. [PMID: 30966500 PMCID: PMC6415437 DOI: 10.3390/polym10050466] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 03/22/2018] [Accepted: 04/11/2018] [Indexed: 02/05/2023] Open
Abstract
The sol-gel and cross-linking processes have been used by researchers to synthesize silica-based nanostructures and optimize their size and morphology by changing either the material or the synthesis conditions. However, the influence of the silica nanostructures on the overall physicochemical and mechanistic properties of organic biopolymers such as chitosan has received limited attention. The present study used a one-step synthetic method to obtain chitosan composites to monitor the uptake and release of a basic cationic dye (methylene blue) at two different pH values. Firstly, the composites were synthesized and characterized by Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Diffraction (XRD) to ascertain their chemical identity. Adsorption studies were conducted suing methylene blue and these studies revealed that Acetic Acid-Chitosan (AA-CHI), Tetraethylorthosilicate-Chitosan (TEOS-CHI), Acetic Acid-Tetraethylorthosilicate-Chitosan (AA-TEOS-CHI), and Acetic Acid-Chitosan-Tetraethylorthosilicate (AA-CHI-TEOS) had comparatively lower percentage adsorbances in acidic media after 40 h, with AA-CHI adsorbing most of the methylene blue dye. In contrast, these materials recorded higher percentage adsorbances of methylene blue in the basic media. The release profiles of these composites were fitted with an exponential model. The R-squared values obtained indicated that the AA-CHI at pH ~ 2.6 and AA-TEOS-CHI at pH ~ 7.2 of methylene blue had steady and consistent release profiles. The release mechanisms were analyzed using Korsmeyer-Peppas and Hixson-Crowell models. It was deduced that the release profiles of the majority of the synthesized chitosan beads were influenced by the conformational or surface area changes of the methylene blue. This was justified by the higher correlation coefficient or Pearson's R values (R ≥ 0.5) computed from the Hixson-Crowell model. The results from this study showed that two of the novel materials comprising acetic acid-chitosan and a combination of equimolar ratios of acetic acid-TEOS-chitosan could be useful pH-sensitive probes for various biomedical applications, whereas the other materials involving the two-step synthesis could be found useful in environmental remediation of toxic materials.
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Affiliation(s)
- Thomas Y A Essel
- Department of Biomedical Engineering, University of Ghana, P.O. Box LG 25, Legon, Ghana.
| | - Albert Koomson
- Department of Biomedical Engineering, University of Ghana, P.O. Box LG 25, Legon, Ghana.
| | - Marie-Pearl O Seniagya
- Department of Biomedical Engineering, University of Ghana, P.O. Box LG 25, Legon, Ghana.
| | - Grace P Cobbold
- Department of Biomedical Engineering, University of Ghana, P.O. Box LG 25, Legon, Ghana.
| | - Samuel K Kwofie
- Department of Biomedical Engineering, University of Ghana, P.O. Box LG 25, Legon, Ghana.
- West Africa Center for Cell Biology of Infectious Pathogens (WACCBIP), University of Ghana, P.O. Box LG 25, Legon, Ghana.
| | - Bernard O Asimeng
- Department of Biomedical Engineering, University of Ghana, P.O. Box LG 25, Legon, Ghana.
| | - Patrick K Arthur
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, P.O. Box LG 25, Legon, Ghana.
- West Africa Center for Cell Biology of Infectious Pathogens (WACCBIP), University of Ghana, P.O. Box LG 25, Legon, Ghana.
| | - Gordon Awandare
- Department of Biochemistry, Cell and Molecular Biology, University of Ghana, P.O. Box LG 25, Legon, Ghana.
- West Africa Center for Cell Biology of Infectious Pathogens (WACCBIP), University of Ghana, P.O. Box LG 25, Legon, Ghana.
| | - Elvis K Tiburu
- Department of Biomedical Engineering, University of Ghana, P.O. Box LG 25, Legon, Ghana.
- West Africa Center for Cell Biology of Infectious Pathogens (WACCBIP), University of Ghana, P.O. Box LG 25, Legon, Ghana.
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