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One-pot synthesis of cellulose-templated copper nanoparticles with antibacterial properties
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kemiteknik. (FSCN Surface and Colloid Chemistry)
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för naturvetenskap. (FSCN Materials Physics)
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för kemiteknik. (FSCN Surface and Colloid Chemistry)
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för naturvetenskap.
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2017 (Engelska)Ingår i: Materials letters (General ed.), ISSN 0167-577X, E-ISSN 1873-4979, Vol. 187, s. 170-172Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We report a facile in situ synthesis of spherical copper nanoparticles (NPs) templated by a gelled cellulose II matrix under alkaline aqueous reaction conditions. In under 20 min, the hybrid material could be obtained in a one-pot reaction. Field-emission scanning electron microscopy (FE-SEM) revealed that the polycrystalline NPs of 200–500 nm were well distributed in the regenerated cellulose matrix. The average Cu crystallite size was of the order of 20 nm, as estimated from both X-ray diffraction (XRD) and FE-SEM. XRD data also indicated that the composite contained up to approximately 20% Cu2O. In suspensions containing the hybrid material, growth of Escerichia coli and Staphylococcus aureus strains was inhibited by 80% and 95%, respectively, after 72 h. The synthesis procedure offers a general approach to designing various low-cost hybrid materials of almost any shape, and the concept could be extended to utilization areas such as catalysis, functional textiles, and food packaging as well as to electronic applications.

Ort, förlag, år, upplaga, sidor
2017. Vol. 187, s. 170-172
Nyckelord [en]
One-pot synthesis, Copper nanoparticles, Cellulose, Hybrid material, Antibacterial properties
Nationell ämneskategori
Nanoteknik Kemiteknik Kompositmaterial och -teknik
Identifikatorer
URN: urn:nbn:se:miun:diva-29336DOI: 10.1016/j.matlet.2016.10.026ISI: 000390628200045Scopus ID: 2-s2.0-84994876232Lokalt ID: FSCNOAI: oai:DiVA.org:miun-29336DiVA, id: diva2:1049258
Projekt
NovoCell - Novel use of native cellulose in dispersions and functional biocomposites
Forskningsfinansiär
Forskningsrådet Formas, 942-2015-251Tillgänglig från: 2016-11-24 Skapad: 2016-11-24 Senast uppdaterad: 2018-06-28Bibliografiskt granskad
Ingår i avhandling
1. Metal-Chelate Complexes in Alkaline Solution: On Recovery Techniques and Cellulose-based Hybrid Material Synthesis
Öppna denna publikation i ny flik eller fönster >>Metal-Chelate Complexes in Alkaline Solution: On Recovery Techniques and Cellulose-based Hybrid Material Synthesis
2018 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

For decades, aminopolycarboxylate chelating agents have been extensively used in various industrial applications. The ability of chelating agents to form stable metal-chelate complexes is the main reason for using them to manage metal ions within water-based industrial processes. Considerable quantities of industrial effluent containing chelating agents and heavy metals are produced and often discharged into the environment. The toxicity of heavy metals and the non-biodegradability of the chelating agents, as well as their accumulation in the environment, has become cause for concern. The main purpose of this thesis was to evaluate and develop processes for recovery of chelated metal complexes from aqueous solution. In this regard, the membrane electrolysis technique was evaluated for recovery of copper and aminopolycarboxylic chelating ligands such as ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), diethylenetriaminepentaacetic acid (DTPA), and a surface-active derivative of DTPA, 2-dodecyldiethylenetriaminepentaacetic acid (C12-DTPA) from aqueous solution. By using this method, it was possible to simultaneously recover the chelating ligand for further reuse and collect the metals by electrodeposition, making the process more cost-effective and hindering the discharge of copper ions and chelating ligands as pollutants into the environment. In addition, the ion flotation technique with the chelating surfactant C12-DTPA could be employed to separate metal ions, especially from their dilute solutions, and concentrate them in a foam phase. This is because C12-DTPA has a purpose-built functionality; besides forming strong coordination complexes with metal ions, it is also surface-active and will readily adsorb at air-water interfaces. In this study, C12-DTPA was effectively used in combination with foaming agents for the removal of toxic metal ions such as Cd2+, Zn2+, and Sr2+ from aqueous solution using ion flotation. From an economical perspective, this method could be combined with the membrane electrolysis technique to recover metal and regenerate chelating surfactant so that it can be reused.

The present work also shows the synthesis of metal and metal oxide(s) nanoparticles (NPs) in alkaline aqueous solution containing chelated metal ions, in order to fabricate metal NPs–cellulose hybrid materials. Cellulose is the most abundant renewable material, with good mechanical performance and chemical resistivity in a wide range of solvents, which makes it a promising material to support metal NPs. In this respect, we developed a rapid and inexpensive one-pot synthesis of spherical copper NPs in a cellulose matrix. The hybrid material displayed antibacterial properties for both the gram-negative and gram-positive bacteria. The synthesis was further developed by studying the influence of various chelating ligands and surfactants on the NPs’ morphology and chemical composition. According to the results, DDAO, a zwitterionic surfactant, was found to mediate the formation of pure octahedral Cu2O NPs. In addition, a hybrid material film composed of regenerated cellulose and synthesized Cu2O nano-octahedrons was fabricated by spin-coating.

Ort, förlag, år, upplaga, sidor
Sundsvall: Mid Sweden University, 2018. s. 68
Serie
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 282
Nationell ämneskategori
Annan kemiteknik
Identifikatorer
urn:nbn:se:miun:diva-33975 (URN)978-91-88527-54-7 (ISBN)
Disputation
2018-06-05, M102, Sundsvall, 13:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2018-06-28 Skapad: 2018-06-28 Senast uppdaterad: 2018-06-28Bibliografiskt granskad

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Eivazihollagh, AlirezaBäckström, JoakimDahlström, ChristinaCarlsson, FredrikIbrahem, IsmailLindman, BjörnEdlund, HåkanNorgren, Magnus

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Eivazihollagh, AlirezaBäckström, JoakimDahlström, ChristinaCarlsson, FredrikIbrahem, IsmailLindman, BjörnEdlund, HåkanNorgren, Magnus
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