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Polyelectrolyte complex induced Stimuli-responsive Self-association and reinforcement of interpenetrated Poly(acrylamide-co-vinyl acetate)/alginate particles for fossil energy recovery. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117596] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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2
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Systematic Evaluation of a Novel Self-Healing Poly(acrylamide-co-vinyl acetate)/Alginate Polymer Gel for Fluid Flow Control in High Temperature and High Salinity Reservoirs. Polymers (Basel) 2021; 13:polym13213616. [PMID: 34771172 PMCID: PMC8588294 DOI: 10.3390/polym13213616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 10/15/2021] [Accepted: 10/18/2021] [Indexed: 11/17/2022] Open
Abstract
Preferential fluid flow often occurs when water and CO2 is injected into mature oilfields, significantly reducing their injection efficiency. Particle gels have been evaluated and applied to control the short circulation problems. This study systematically investigated a novel poly(acrylamide-co-vinyl acetate)/alginate-based interpenetrated gel system (Alg-IPNG) which is designed to control the preferential fluid flow problems in high-temperature reservoirs. Chromium acetate was incorporated into the gel system to provide the delayed crosslinking feature of the particle gels. The alginate polymer system can also take advantage of the Ca2+ ions in the formation water, which exist in most reservoirs, to reinforce its strength by capturing the Ca2+ to form Ca–alginate bonds. In this paper, various characterizations for the Alg-IPNGs before and after the self-healing process were introduced: (1) the elastic modulus is set at up to 1890 Pa, and (2) the water uptake ratio is set at up to 20. In addition, we also discuss their possible self-healing and reinforcement mechanisms. In particular, the self-healing starting time of the Alg-IPNG particles are modified between 38 to 60 h, which is related to the water uptake ratio, Ca2+ concentration, and temperature. The reinforced Alg-IPNG gel has an enhanced thermal stability (180 days) at the temperature up to 110 °C.
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Saheed IO, Oh WD, Suah FBM. Chitosan modifications for adsorption of pollutants - A review. JOURNAL OF HAZARDOUS MATERIALS 2021; 408:124889. [PMID: 33418525 DOI: 10.1016/j.jhazmat.2020.124889] [Citation(s) in RCA: 150] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 12/14/2020] [Accepted: 12/15/2020] [Indexed: 05/18/2023]
Abstract
In recent times, research interest into the development of biodegradable, cost-effective and environmental friendly adsorbents with favourable properties for adsorption of pollutants is a challenge. Modification of chitosan via different physical and chemical methods have gained attention as a promising approach for removing organic (such as dyes and pharmaceuticals) and inorganic (such as metal/metal ions) pollutants from aqueous medium. In this regard, researchers have reported grafting and cross-linking approach among others as a potentially useful method for chitosan's modification for improved adsorption efficiency with respect to pollutant uptake. This article reviews the trend in chitosan modification, with regards to the summary of some recently published works on modification of chitosan and their adsorption application in pollutants (metal ion, dyes and pharmaceuticals) removal from aqueous medium. The review uniquely highlights some common cross-linkers and grafting procedures for chitosan modification, their influence on structure and adsorption capacity of modified-chitosan with respect to pollutants removal. Findings revealed that the performance of modified chitosan for adsorption of pollutants depends largely on the modification method adopted, materials used for the modification and adsorption experimental conditions. Cross-linking is commonly utilized for improving the chemical and mechanical stabilities of chitosan but usually decreases adsorption capacity of chitosan/modified-chitosan for adsorption of pollutants. However, literature survey revealed that adsorption capacity of cross-linked chitosan based materials have been enhanced in recently published works either by grafting, incorporation of solid adsorbents (e.g metals, clays and activated carbon) or combination of both prior to cross-linking.
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Affiliation(s)
- Ismaila Olalekan Saheed
- Green Analytical Chemistry Laboratory, School of Chemical Sciences, Universiti Sains Malaysia, Minden, Pulau Pinang 11800, Malaysia; Department of Chemical, Geological and Physical Sciences, Kwara State University, Malete, P.M.B 1530, Ilorin, Nigeria
| | - Wen Da Oh
- Green Analytical Chemistry Laboratory, School of Chemical Sciences, Universiti Sains Malaysia, Minden, Pulau Pinang 11800, Malaysia
| | - Faiz Bukhari Mohd Suah
- Green Analytical Chemistry Laboratory, School of Chemical Sciences, Universiti Sains Malaysia, Minden, Pulau Pinang 11800, Malaysia
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Zhang N, Wang S, Gibril ME, Kong F. The copolymer of polyvinyl acetate containing lignin-vinyl acetate monomer: Synthesis and characterization. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2019.109411] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Merzendorfer H. Chitosan Derivatives and Grafted Adjuncts with Unique Properties. BIOLOGICALLY-INSPIRED SYSTEMS 2019. [DOI: 10.1007/978-3-030-12919-4_3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Montaser AS, Mahmoud FA. Preparation of Chitosan-grafted-Polyvinyl acetate Metal Nanocomposite for producing Multifunctional Textile Cotton Fabrics. Int J Biol Macromol 2018; 124:659-666. [PMID: 30500512 DOI: 10.1016/j.ijbiomac.2018.11.254] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 11/17/2018] [Accepted: 11/26/2018] [Indexed: 10/27/2022]
Abstract
Chitosan-g-polyvinyl acetate (Cs-g-PVAc) was synthesized successfully using redox copolymerization using potassium persulfate as initiator. TiO2 and TiO2 doped ZnO which previously prepared by sol-gel technique added for preparing emulsion from polymer - metal oxide nanocomposites. Cotton fabrics were treated with prepared emulsions using citric acid and sodium hypophosphite. XRD measurements prove that the prepared TiO2 nanoparticles corresponded to anatase phase with average crystallite size d = 15.98 nm where the crystallinity and crystallite size decreased for Zn doped TiO2 where d = 11.7 nm. FTIR indicates that the exhibition of grafting process and formation polymer metal oxide nanocomposite. Samples treated with Copolymer showed the highest antibacterial properties. However, the copolymer doped with TiO2 and TiO2/ZnO showed lowest contact angle and affects positively on its photocatalytic performance. SEM and TEM micrographs confirmed that the prepared metal oxides are in nano scales, where TiO2 is smaller than TiO2/ZnO which effects on the band gap of TiO2/ZnO to be larger than TiO2 and consequently decreased on the photocatalytic properties TiO2/ZnO of samples compared to TiO2 sample under the halogen lamp.
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Affiliation(s)
- Ahmed S Montaser
- National Research Centre (Scopus Affiliation ID 60014618), Textile Research Division, Pre-treatment and Finishing of Cellulosic Fibers Department, El-Behouth St., Dokki, P.O. 12622, Giza, Egypt; Forest Biomaterial Department, College of natural Resources, North Carolina State University, Campus Box 8005, Raleigh, USA.
| | - Fawzy A Mahmoud
- Solid State Physics Department, National Research Center (Scopus Affiliation ID 60014618), Dokki, Giza 12622, Egypt
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Salama HE, Saad GR, Sabaa MW. Synthesis, characterization and antimicrobial activity of biguanidinylated chitosan- g -poly[( R )-3-hydroxybutyrate]. Int J Biol Macromol 2017; 101:438-447. [DOI: 10.1016/j.ijbiomac.2017.03.075] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 12/14/2016] [Accepted: 03/14/2017] [Indexed: 11/24/2022]
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Salahuddin N, Elbarbary AA, Salem ML, Elksass S. Antimicrobial and antitumor activities of 1,2,4-triazoles/polypyrrole chitosan core shell nanoparticles. J PHYS ORG CHEM 2017. [DOI: 10.1002/poc.3702] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Nehal Salahuddin
- Department of Chemistry, Faculty of Science; Tanta University; Tanta Egypt
| | - Ahmed A. Elbarbary
- Department of Chemistry, Faculty of Science; Tanta University; Tanta Egypt
| | - Mohamed L. Salem
- Department of Zoology, Faculty of Science; Tanta University; Tanta Egypt
| | - Samar Elksass
- Department of Chemistry, Faculty of Science; Tanta University; Tanta Egypt
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Lai SM, Sun WW, Don TM. Preparation and characterization of biodegradable polymer blends from poly(3-hydroxybutyrate)/poly(vinyl acetate)-modified corn starch. POLYM ENG SCI 2015. [DOI: 10.1002/pen.24071] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sun-Mou Lai
- Department of Chemical and Materials Engineering; National I-Lan University; I-Lan 260 Taiwan
| | - Wei-Wei Sun
- Department of Chemical and Materials Engineering; Tamkang University; New Taipei City 25137 Taiwan
| | - Trong-Ming Don
- Department of Chemical and Materials Engineering; Tamkang University; New Taipei City 25137 Taiwan
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Sabaa MW, Mohamed RR, Eltaweel SH, Seoudi RS. Crosslinked poly(vinyl alcohol)/carboxymethyl chitosan hydrogels for removal of metal ions and dyestuff from aqueous solutions. J Appl Polym Sci 2011. [DOI: 10.1002/app.35072] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Preparation and Properties of Copolymer of Methacrylic Acid and Acrylamide onto Degraded Chitosan Initiated by HRP/H 2O 2/ACAC. ACTA ACUST UNITED AC 2011. [DOI: 10.4028/www.scientific.net/amm.80-81.396] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The chitosan was degraded by hydrochloric acid and the effects of concentration of chitosan, amount of hydrochloric acid, reaction temperature and reaction time on the viscosity of chitosan were investigated. The results showed that the degraded chitosan with low viscosity could be prepared when chitosan (wt 6%) was dissolved in acetic acid solution and hydrochloric acid (wt 3%) at 90°C for 6 h to decrease the viscosity from 7.52 mPa·s to 2.48 mPa·s. Then, a graft copolymer was synthesized by copolymerization of degraded chitosan with methacrylic acid (MAA) and acrylamide (AAM) by using horseradish peroxidase (HRP)/H2O2/acetylacetone (ACAC) as initiator. The structures of original chitosan, degraded chitosan and the copolymer were characterized by FTIR. The copolymer was applied to the leather industry as an amphoteric retanning agent. The applied results showed that the retanned leather had the merits of good uniformity fullness softness, strong selecting filling properties, good dyeing ability and antimicrobial activity.
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Chromium (VI) ion adsorption features of chitosan film and its chitosan/zeolite conjugate 13X film. Molecules 2011; 16:3569-79. [PMID: 21527884 PMCID: PMC6263274 DOI: 10.3390/molecules16053569] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 02/21/2011] [Accepted: 03/09/2011] [Indexed: 11/30/2022] Open
Abstract
This research evaluated the importance of the adsorption properties of chitosan a chitosan/zeolite conjugate film for the removal of Cr(VI) ions from solutions in the 5–260 mg/L concentration range, when the pH was adjusted to 4.0 and 6.0. The uptake capacities of the films formed by chitosan and by the chitosan/zeolite conjugate were calculated by mass balance. The equilibrium isotherms were fitted to the Langmuir, Freundlich and Redlich-Peterson models. The chitosan film seems to be a good sorbent for Cr(VI) at pH 4, but its physical instability suggests the need for a more resilient support. Due to this fact zeolite was added to the chitosan matrix in solution and a chitosan/zeolite (CS/Zeo) film was thus formed. The solubility of the film and the characterization of the different matrices by FTIR, TGA and X-Ray showed that a cross-linked structure was formed between the chitosan and zeolite and the solubility of the film increased. In this study, the low manufacturing cost of the CS/Zeo matrix, the good uptake of Cr(VI) at acidic pH (17.28 mg/g) and the non desorption of Cr(VI) from the film in water suggests this combination should be tested in industrial environment.
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Don TM, Chou SC, Cheng LP, Tai HY. Cellular compatibility of copolymer hydrogels based on site-selectively-modified chitosan with poly(N-isopropyl acrylamide). J Appl Polym Sci 2010. [DOI: 10.1002/app.32806] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Zhao X, He JINX, Zhan YZ. Synthesis and Characterization of Chitosan Biguanidine Hydrochloride under Microwave Irradiation. Polym J 2009. [DOI: 10.1295/polymj.pj2009087] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Radhakumary C, Nair PD, Mathew S, Reghunadhan Nair CP. Synthesis, characterization, and properties of poly(vinyl acetate)- and poly(vinyl alcohol)-grafted chitosan. J Appl Polym Sci 2007. [DOI: 10.1002/app.25841] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Elkholy S, Khalil KD, Elsabee MZ, Eweis M. Grafting of vinyl acetate onto chitosan and biocidal activity of the graft copolymers. J Appl Polym Sci 2006. [DOI: 10.1002/app.24785] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ibrahim SM, El-Salmawi KM, El-Naggar AA. Use of radiation grafting of polyethylene-coated polypropylene nonwoven fabric by acrylamide for the removal of heavy metal ions from wastewaters. J Appl Polym Sci 2006. [DOI: 10.1002/app.24629] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Singh V, Tripathi DN, Tiwari A, Sanghi R. Microwave promoted synthesis of chitosan-graft-poly(acrylonitrile). J Appl Polym Sci 2004. [DOI: 10.1002/app.21245] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Zhao L, Mitomo H, Zhai M, Yoshii F, Nagasawa N, Kume T. Synthesis of antibacterial PVA/CM-chitosan blend hydrogels with electron beam irradiation. Carbohydr Polym 2003. [DOI: 10.1016/s0144-8617(03)00103-6] [Citation(s) in RCA: 183] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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