Synthesis and characterization of imine-modified silicas obtained by the reaction of essential oil of Eucalyptus citriodora, 3-aminopropyltriethoxysilane and tetraethylorthosilicate

Montenegro, Lara M. P.; Griep, Jordana Borges; Tavares, Fabiele C.; Hartwig, Daniela; Bianchini, Daniela; Jacob, Raquel G.

doi:10.1016/j.vibspec.2013.08.009

Cited by 10 publications

(7 citation statements)

References 28 publications

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“…As shown in Figure 2 , compared to the FT-IR spectra of the pure silica, all curves of the modified silica had absorption peaks at 2930, 2970 and 2870 cm −1 , attributed to the vibrations of –CH 2 – and –CH 3 bonds [ 37 ]. The appearance of organic groups, such as –CH 2 – and –CH 3 , on the modified silica surface shows that K-MEPTS and AEO exist on the silica surface.…”

Section: Resultsmentioning

confidence: 99%

Silica Modified by Alcohol Polyoxyethylene Ether and Silane Coupling Agent Together to Achieve High Performance Rubber Composites Using the Latex Compounding Method

Zheng¹,

Han³

et al. 2017

Polymers

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Abstract:The study of preparing silica/rubber composites used in tires with low rolling resistance in an energy-saving method is fast-growing. In this study, a novel strategy is proposed, in which silica was modified by combing alcohol polyoxyethylene ether (AEO) and 3-mercaptopropyltriethoxysilane (K-MEPTS) for preparing silica/natural rubber (NR) master batches. A thermal gravimetric analyzer and Raman spectroscopy results indicated that both AEO and K-MEPTS could be grafted on to the silica surface, and AEO has a chance to shield the mercaptopropyl group on K-MEPTS. Silica modified by AEO and K-MEPTS together was completely co-coagulated with the rubber in preparing silica/NR composites using the latex compounding method with the help of the interaction between AEO and K-MEPTS. The performance of composites prepared by silica/NR master batches was investigated by a rubber process analyzer (RPA), transmission electron microscopy (TEM) and a tensile tester. These results demonstrate that AEO forms a physical interface between silica and rubber, resulting in good silica dispersion in the matrix. K-MEPTS forms a chemical interface between silica and rubber, enhancing the reinforcing effect of silica and reducing the mutual friction between silica particles. In summary, using a proper combination of AEO and K-MEPTS is a user-friendly approach for preparing silica/NR composites with excellent performance.

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Section: Resultsmentioning

confidence: 99%

Silica Modified by Alcohol Polyoxyethylene Ether and Silane Coupling Agent Together to Achieve High Performance Rubber Composites Using the Latex Compounding Method

Zheng¹,

Han³

et al. 2017

Polymers

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“…e stability of liposomes is being improved through various strategies such as polymer-coated liposomes, hydrogel-liposome composites, and nanoparticlestabilized liposomes [126][127][128].…”

Section: Encapsulation Of Eugenol Essentialmentioning

confidence: 99%

Essential Oils-Loaded Electrospun Biopolymers: A Future Perspective for Active Food Packaging

Ataei

Azari

Hassan

et al. 2020

Advances in Polymer Technology

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The growth of global food demand combined with the increased appeal to access different foods from every corner of the globe is forcing the food industry to look for alternative technologies to increase the shelf life. Essential oils (EOs) as naturally occurring functional ingredients have shown great prospects in active food packaging. EOs can inhibit the growth of superficial food pathogens, modify nutritious values without affecting the sensory qualities of food, and prolong the shelf life when used in food packaging as an active ingredient. Since 2016, various reports have demonstrated that combinations of electrospun fibers and encapsulated EOs could offer promising results when used as food packaging. Such electrospun platforms have encapsulated either pure EOs or their complexation with other antibacterial agents to prolong the shelf life of food products through sustained release of active ingredients. This paper presents a comprehensive review of the essential oil-loaded electrospun fibers that have been applied as active food packaging material.

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“…The absorption bands at 1647 and 1448 cm −1 may be associated with vibration of C═C stretching of olefinic groups of the essential oil and a double CH 3 and CH 2 antisymmetric curvature scissors. Various absorption bands common to all essential oil components were found, such as double bonds of methyl and methylene groups (Montenegro and others ).…”

Section: Resultsmentioning

confidence: 97%

Production, Characterization, and Stability of Orange or Eucalyptus Essential Oil/β‐Cyclodextrin Inclusion Complex

Kringel

Antunes

Klein

et al. 2017

Journal of Food Science

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The aim of this study was to produce and characterize inclusion complexes (IC) between β-cyclodextrin (β-CD) and orange essential oil (OEO) or eucalyptus essential oil (EEO), and to compare these with their pure compounds and physical mixtures. The samples were evaluated by chemical composition, morphology, thermal stability, and volatile compounds by static headspace-gas chromatography (SH-GC). Comparing the free essential oil and physical mixture with the inclusion complex, of both essential oils (OEO and EEO), it was observed differences occurred in the chemical composition, thermal stability, and morphology. These differences show that there was the formation of the inclusion complex and demonstrate the necessity of the precipitation method used to guarantee the interaction between β-CD and essential oils. The slow loss of the volatile compounds from both essential oils, when complexed with β-CD, showed a higher stability when compared with their physical mixtures and free essential oils. Therefore, the results showed that the chemical composition, molecular size, and structure of the essential oils influence the characteristics of the inclusion complexes. The application of the β-CD in the formation of inclusion complexes with essential oils can expand the potential applications in foods.

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Synthesis and characterization of imine-modified silicas obtained by the reaction of essential oil of Eucalyptus citriodora, 3-aminopropyltriethoxysilane and tetraethylorthosilicate

Cited by 10 publications

References 28 publications

Silica Modified by Alcohol Polyoxyethylene Ether and Silane Coupling Agent Together to Achieve High Performance Rubber Composites Using the Latex Compounding Method

Silica Modified by Alcohol Polyoxyethylene Ether and Silane Coupling Agent Together to Achieve High Performance Rubber Composites Using the Latex Compounding Method

Essential Oils-Loaded Electrospun Biopolymers: A Future Perspective for Active Food Packaging

Production, Characterization, and Stability of Orange or Eucalyptus Essential Oil/β‐Cyclodextrin Inclusion Complex

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