Hybrid films synthesised from epoxidised castor oil, γ-glycidoxypropyltrimethoxysilane and tetraethoxysilane

Luca, Maria Augusta De; Martinelli, Márcia; Barbieri, Cláudia Caroline Teixeira

doi:10.1016/j.porgcoat.2009.03.002

Cited by 34 publications

(20 citation statements)

References 17 publications

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“…Several inorganic precursors have been used to prepare organic/inorganic films with castor oil. Hybrid coatings have been prepared from epoxidized castor oil and the silicon-rich precursors tetraethoxysilane (TEOS) [128], glycidoxypropyltrimethoxysilane (GPTMS) [129] and the combination of aminopropyltriethoxysilane (APTES) and TEOS [130], in all cases improving substantially the hardness, maintaining the high adhesion to the surface and improving the corrosion protection. Hydroxylated castor oil (HCO) was also used to prepare hybrid coatings with the titania precursor titanium isopropoxide (TIP) [131] added in various proportions.…”

Section: Paints Coatings and Adhesivesmentioning

confidence: 99%

Modified Vegetable Oil Based Additives as a Future Polymeric Material—Review

Samarth¹,

Mahanwar²

2015

OJOPM

124

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Polymeric materials from renewable resources have attracted a lot of attention in recent years. The development and utilization of vegetable oils for polymeric materials are currently in the spotlight of the polymer and chemical industry, as they are the largest renewable platform due to their universal wide availability, ingrained biodegradability, low cost, and excellent environmental aspects (i.e., low ecotoxicity and low toxicity toward humans). These excellent natural characteristics are now being taken advantage of in research and development, with vegetable oil derived polymers/polymeric materials/composites being used in numerous applications including paints and coatings, adhesives, and nanocomposites. The aim of this review paper is to give a fundamental description of the various vegetable oil applications in polymer materials and its recent developments. Particular emphasis will be placed on study and main application of triglyceride based additive for polymer and to give the reader an insight into the main developments is discussed.

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Section: Paints Coatings and Adhesivesmentioning

confidence: 99%

Modified Vegetable Oil Based Additives as a Future Polymeric Material—Review

Samarth¹,

Mahanwar²

2015

OJOPM

124

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“…5.2-5.6 ppm, together with the overlap of resonance of the -CH group from the glycerol, while those assigned to the -CH 2 groups of glycerol are presented as a multiplet at the 4.0-4.3 ppm region. The resonance for -C(H) on carbon 12 of ricinoleic acid, which already contains a hydroxyl group, appears at 3.6 ppm, whilst the others are the resonances characteristic of the -CH 2 groups and the terminal -CH 3 of carbon backbone of ricinoleic fatty acid [7]. The 1 H-NMR spectrum of ECO (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The combination of vegetable oils with hard inorganic materials improves this property as well as other characteristics, such as the mechanical resistance, among others. This is attained through the sol-gel process of inorganic precursors which polymerise into the oil systems, at mild temperature conditions, through diverse types of interaction, producing new hybrid or nanocomposite materials [3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Organic–Inorganic Coatings Based on Epoxidised Castor Oil/APTES/TEOS

Becchi

Luca

Martinelli

et al. 2010

J Americ Oil Chem Soc

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Two series of organic-inorganic hybrid films were prepared from epoxidised castor oil (ECO) and the inorganic precursor 3-aminopropyltriethoxysilane (APTES), and the combination of APTES with tetraethoxysilane (TEOS) with different organic to inorganic proportions. Films were pre-cured at room temperature under inert atmosphere and subsequently submitted to thermal curing. The macro-and microscopic properties of the films, including adhesion, hardness, microstructure and thermal properties, were determined as a function of the proportion of ECO to inorganic precursors. Morphologic studies showed that the hybrid films were microscopically homogeneous. The hardness and tensile strength of the films increased with increased concentrations of inorganic precursor. All of the films exhibited good adhesion to an aluminium surface and worked as an efficient barrier against corrosion.

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“…[25,40] For each series, 0, 5, or 10 wt.% of TEOS was added to the formulation before application, as summarized in Table 2. Moreover, to increase the hardness of the films, the addition of a sol-gel curing agent, TEOS, has been considered.…”

Section: Film Thicknessmentioning

confidence: 99%

Preparation and Spectroscopic Characterization of Si‐Coated Vegetable Oils and their Application in In Situ Curing of Hybrid Coatings

Maurin‐Pasturel

Lemor²,

Robin

et al. 2019

Euro J Lipid Sci & Tech

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The modification of natural oils with heteroatoms leads to materials that can be employed in various areas thanks to their specific properties. Here, a solventless chemical modification of epoxidized linseed oil with an aminosilane without a catalyst is developed, and a detailed study of the chemical reactions involved during the process is reported. The mechanism results in two competitive reactions: the ring‐opening of epoxides and trans‐amidification of triglycerides with the amine functional group of aminosilane. These competitive reactions are shown by infrared spectroscopy (FTIR) and 1H, 13C, and 2D nuclear magnetic resonance (NMR). Even if the epoxy ring‐opening remains the major route, the trans‐amidification cannot be ignored. These modified oils are very reactive under atmospheric conditions by cross‐linking according to a polycondensation of the −Si(OMe)3 moieties or via a sol‐gel process and lead to a rapid hardening. The final material gives hydrophobic and glossy coatings on cellulose and glass. Practical Applications: This paper details the easy route to convert vegetable oils into coatings by crosslinking under mild conditions. These bio‐based materials can be applied as oil‐based impregnating products for exterior wood protection and in the hydrophobization of paper. Epoxidized linseed oil is chemically modified with an amino silane to make it reactive under atmospheric conditions. The chemical reaction is detailed and side reactions identified. Polycondensation of the grafted alkoxysilanes leads to hydrophobic coatings on cellulose and glass.

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Hybrid films synthesised from epoxidised castor oil, γ-glycidoxypropyltrimethoxysilane and tetraethoxysilane

Cited by 34 publications

References 17 publications

Modified Vegetable Oil Based Additives as a Future Polymeric Material—Review

Modified Vegetable Oil Based Additives as a Future Polymeric Material—Review

Organic–Inorganic Coatings Based on Epoxidised Castor Oil/APTES/TEOS

Preparation and Spectroscopic Characterization of Si‐Coated Vegetable Oils and their Application in In Situ Curing of Hybrid Coatings

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