Eco-friendly nanocomposites derived from geranium oil and zinc oxide in one step approach

Al-Jumaili, Ahmed; Mulvey, Peter; Kumar, Avishek; Prasad, Karthika; Bazaka, Kateryna; Warner, Jeffrey; Jacob, Mohan V.

doi:10.1038/s41598-019-42211-z

Cited by 36 publications

(34 citation statements)

References 76 publications

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“…Surfaces functionalized with enzymes, antibiotics and biocides have also been used in the effort to combat microbial attachment [11][12][13]. Hydrophilic/hydrophobic modification and immobilization of nanoparticles (Nps), such as Cu, ZnO, and Ag, onto the surface of material have been used separately as an effective strategy to reduce biofilm formation [14][15][16][17][18]. Surfaces modified to display hydrophilic behavior have shown superior antifouling properties [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

In-Situ Surface Modification of Terpinen-4-ol Plasma Polymers for Increased Antibacterial Activity

et al. 2020

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Surface modification of thin films is often performed to enhance their properties. In this work, in situ modification of Terpinen-4-ol (T4) plasma polymer is carried out via simultaneous surface functionalization and nanoparticle immobilization. Terpinen-4-ol plasma polymers surface were decorated with a layer of ZnO nanoparticles in an oxygen plasma environment immediately after polymer deposition. A combination of hydrophilic modification and ZnO nanoparticle functionalization of the T4 polymer surface led to an enhancement in antibacterial properties by factor of 3 (from 0.75 to 0.25 CFU.mm−2). In addition, ZnO nanoparticle-modified coatings demonstrated improved UV absorbing characteristics in the region of 300–400 nm by 60% relative to unmodified coatings. The ZnO modified coatings were transparent in the visible region of 400–700 nm. The finding points towards the potential use of ZnO nanoparticle-modified T4 plasma polymers as optically transparent UV absorbing coatings.

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Section: Introductionmentioning

confidence: 99%

In-Situ Surface Modification of Terpinen-4-ol Plasma Polymers for Increased Antibacterial Activity

et al. 2020

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“…Then, the resultant packaging can serve to improve the distribution logistics and food preservation [48]. For instance, Al-Jumaili et al [49] developed nanocomposite films combining renewable geranium essential oil (GEO) with ZnO. These sustainable nanocomposite films were proposed as active coatings of medical devices.…”

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confidence: 99%

Electrospun Active Biopapers of Food Waste Derived Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) with Short-Term and Long-Term Antimicrobial Performance

et al. 2020

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This research reports about the development by electrospinning of fiber-based films made of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) derived from fermented fruit waste, so-called bio-papers, with enhanced antimicrobial performance. To this end, different combinations of oregano essential oil (OEO) and zinc oxide nanoparticles (ZnONPs) were added to PHBV solutions and electrospun into mats that were, thereafter, converted into homogeneous and continuous films of 130 µm. The morphology, optical, thermal, mechanical properties, crystallinity, and migration into food simulants of the resultant PHBV-based bio-papers were evaluated and their antimicrobial properties were assessed against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) in both open and closed systems. It was observed that the antimicrobial activity decreased after 15 days due to the release of the volatile compounds, whereas the bio-papers filled with ZnONPs showed high antimicrobial activity for up to 48 days. The electrospun PHBV biopapers containing 2.5 wt% OEO + 2.25 wt% ZnONPs successfully provided the most optimal activity for short and long periods against both bacteria. Nanomaterials 2020, 10, 506 2 of 26 studied, including the poly(3-hydroxybutyrate) (PHB or P3HB) homopolyester and its copolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). The latter shows lower crystallinity and melting point as well as greater flexibility, which broadens its industrial applicability [4,5]. In order to confer active properties to PHAs, several substances can be incorporated into the biopolymers such as essential oils (EOs) and inorganic or metal nanoparticles (MNPs) [6,7].EOs are the product of the secondary metabolism of plants, separated from the aqueous phase, which is formed by various volatile components such as terpenes, alcohols, acids, esters, epoxies, aldehydes, ketones, amines, and sulphides, among others [8]. This wide range of compounds are responsible for the strong biological activity and also the antioxidant, antimicrobial, antifungal, and antiviral properties of plants [9]. In addition, EOs are biologically safe and have a low risk of causing resistance in pathogens [10]. In addition, they are classified as Generally Recognized as Safe (GRAS) by the U.S. Food and Drug Administration (FDA) [11]. Among them, oregano essential oil (OEO) is one of the most important and it is widely used in the pharmaceutical, food, and cosmetics industries [12]. It comes from the genus Origanum that belongs to the Lamiaceae family [13], which is constituted by more than 38 monoterpenoids [14]. Their main active compounds are carvacrol, thymol, p-cymene, and γ-terpinene, which are responsible for its high antimicrobial and antioxidant activities [15,16]. These active compounds have been particularly related to the inhibition of G− bacteria such as Escherichia coli (E. coli), Pseudomonas aeruginosa (P. aeruginosa), and Salmonella typhimurium (S. typhimurium) and G+ bacteria including Staphylococcus aureus (S. aureus), Listeria mo...

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“…The atomic force microscopy image (AFM) in Figure 2e shows that the pristine polymer was uniform and smooth, with an average roughness of 0.25 nm for an input power of 10 W. In contrast, composite films revealed a porous surface, as seen in Figure 2e, with a random distribution of ZnO NPs, where the average roughness was at 33.7 ± 2.1 nm for the input power of 10 W. SEM and AFM data were briefly presented in this report only to demonstrate that the material contained ZnO NPs with antimicrobial properties. A more in-depth investigation of the release of ZnO NPs and morphological, surface, chemical, and antimicrobial properties of Zn/Ge composites films can be found in our previous report [13].…”

Section: Resultsmentioning

confidence: 99%

“…The development of multifunctional surface coatings that reveal both insulation and antimicrobial properties could be accomplished through the use of metal/polymer nanocomposite films. In our previous study [13], a novel nanocomposite film was fabricated from ZnO nanoparticles (NPs) and renewable geranium oil using a single-step plasma-enabled approach. We demonstrated that a significant antibacterial activity could be achieved by incorporating a low concentration (~1%) of zinc oxide nanoparticles into inherently antibacterial geranium thin films [13].…”

Section: Introductionmentioning

confidence: 99%

“…In our previous study [13], a novel nanocomposite film was fabricated from ZnO nanoparticles (NPs) and renewable geranium oil using a single-step plasma-enabled approach. We demonstrated that a significant antibacterial activity could be achieved by incorporating a low concentration (~1%) of zinc oxide nanoparticles into inherently antibacterial geranium thin films [13]. In this report, we investigated the electrical properties of ZnO/geranium polymer (Zn/Ge) films with the intention to design composite coatings, which are electrically insulating and biologically active, serving as a relevant material for encapsulation of microelectronic systems and implantable devices.…”

Section: Introductionmentioning

confidence: 99%

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Electrically Insulating Plasma Polymer/ZnO Composite Films

et al. 2019

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In this report, the electrical properties of plasma polymer films functionalized with ZnO nanoparticles were investigated with respect to their potential applications in biomaterials and microelectronics fields. The nanocomposite films were produced using a single-step method that combines simultaneous plasma polymerization of renewable geranium essential oil with thermal decomposition of zinc acetylacetonate Zn(acac)2. The input power used for the deposition of composites were 10 W and 50 W, and the resulting composite structures were abbreviated as Zn/Ge 10 W and Zn/Ge 50 W, respectively. The electrical properties of pristine polymers and Zn/polymer composite films were studied in metal–insulator–metal structures. At a quantity of ZnO of around ~1%, it was found that ZnO had a small influence on the capacitance and dielectric constants of thus-fabricated films. The dielectric constant of films with smaller-sized nanoparticles exhibited the highest value, whereas, with the increase in ZnO particle size, the dielectric constant decreases. The conductivity of the composites was calculated to be in the in the range of 10−14–10−15 Ω−1 m−1, significantly greater than that for the pristine polymer, the latter estimated to be in the range of 10−16–10−17 Ω−1 m−1.

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Eco-friendly nanocomposites derived from geranium oil and zinc oxide in one step approach

Cited by 36 publications

References 76 publications

In-Situ Surface Modification of Terpinen-4-ol Plasma Polymers for Increased Antibacterial Activity

In-Situ Surface Modification of Terpinen-4-ol Plasma Polymers for Increased Antibacterial Activity

Electrospun Active Biopapers of Food Waste Derived Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) with Short-Term and Long-Term Antimicrobial Performance

Electrically Insulating Plasma Polymer/ZnO Composite Films

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