Vegetable oil-based epoxies

Karak, Niranjan

doi:10.1533/9780857097149.180

Cited by 9 publications

(5 citation statements)

References 47 publications

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“…The esters are mainly used as a fuel, but can be also transformed to epoxides, which have many applications. The epoxidation is a reaction of double bonds between two carbon atoms with hydrogen peroxide which leads to the formation of the epoxide group [ 4 ]. The epoxides can be used as: (i) bio-lubricants in means of transport (additives to oils) [ 5 ] or (ii) raw materials for bio-polymers (as monomers), higher alcohols, olefins, glycols, polyesters and polycarbonates (reaction with CO 2 , which is consumed) [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Epoxidation of Methyl Esters as Valuable Biomolecules: Monitoring of Reaction

Hájek

Kocián

et al. 2023

Molecules

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The paper is focused on the epoxidation of methyl esters prepared from oil crops with various profiles of higher fatty acids, especially unsaturated, which are mainly contained in the non-edible linseed and Camelina sativa oil (second generation). The novelty consists in the separation and identification of all products with oxirane ring formed through a reaction and in the determination of time course. Through the epoxidation, many intermediates and final products were formed, i.e., epoxides with different number and/or different position of oxirane rings in carbon chain. For the determination, three main methods (infrared spectroscopy, high-pressure liquid chromatography and gas chromatography with mass spectrometry) were applied. Only gas chromatography enables the separation of individual epoxides, which were identified on the base of the mass spectra, molecule ion and time course of products. The determination of intermediates enables: (i) control of the epoxidation process, (ii) determination of the mixture of epoxides in detail and so the calculation of selectivity of each product. Therefore, the epoxidation will be more environmentally friendly especially for advanced applications of non-edible oil crops containing high amounts of unsaturated fatty acids.

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Section: Introductionmentioning

confidence: 99%

Epoxidation of Methyl Esters as Valuable Biomolecules: Monitoring of Reaction

Hájek

Kocián

et al. 2023

Molecules

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“…This substitution presents an interesting alternative, because not only are EVOs lower cost, but they offer other advantages, such as being a natural product, harmless, biodegradable, etc. Surprisingly, the presence of EVOs has seen distinct improvement in mechanical and thermal properties in their PLA blends [ 22 , 23 , 24 , 25 ]. Among the EVOs studied in the literature, epoxidized soybean oil (ESO)—a representative of EVOs—has been extensively reported as a plasticizer for PLA modifications [ 26 , 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

MWCNTs-Reinforced Epoxidized Linseed Oil Plasticized Polylactic Acid Nanocomposite and Its Electroactive Shape Memory Behaviour

Alam

Mohan

et al. 2014

IJMS

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A novel electroactive shape memory polymer nanocomposite of epoxidized linseed oil plasticized polylactic acid and multi-walled carbon nanotubes (MWCNTs) was prepared by a combination of solution blending, solvent cast technique, and hydraulic hot press moulding. In this study, polylactic acid (PLA) was first plasticized by epoxidized linseed oil (ELO) in order to overcome the major limitations of PLA, such as high brittleness, low toughness, and low tensile elongation. Then, MWCNTs were incorporated into the ELO plasticized PLA matrix at three different loadings (2, 3 and 5 wt. %), with the aim of making the resulting nanocomposites electrically conductive. The addition of ELO decreased glass transition temperature, and increased the elongation and thermal degradability of PLA, as shown in the results of differential scanning calorimetry (DSC), tensile test, and thermo gravimetric analysis (TGA). Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to observe surface morphology, topography, and the dispersion of MWCNTs in the nanocomposite. Finally, the electroactive-shape memory effect (electroactive-SME) in the resulting nanocomposite was investigated by a fold-deploy “U”-shape bending test. As per the results, the addition of both ELO and MWCNTs to PLA matrix seemed to enhance its overall properties with a great deal of potential in improved shape memory. The 3 wt. % MWCNTs-reinforced nanocomposite system, which showed 95% shape recovery within 45 s at 40 DC voltage, is expected to be used as a preferential polymeric nanocomposite material in various actuators, sensors and deployable devices.

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“…Esses óleos epoxidados têm sido tradicionalmente usados como lubrificantes [68], [69], plastificantes e estabilizadores [70], em formulações para tintas e recobrimentos [71], [72] e como diluentes em resinas epóxi derivadas de petróleo [73], [74] estendido também à produção de resinas epóxi sustentáveis, porque compartilham muitas das características das resinas epóxi termoendurecíveis convencionais derivadas de petróleo [14] e são uma boa alternativa para reduzir o impacto ambiental negativo, uma vez que são obtidos a partir de recursos renováveis [74], [56], [75], [76]. Aliás, reporta-se a preparação de pré-polímeros epóxi a partir de diversas fontes vegetais tais como EVOs de sementes de soja [77], [78], linhaça [79], girassol [80], mamona [81], [78], colza (canola) [80], algodão [82], fruta do conde [83], crambe [84], Mesua férrea [85], mahua (Madhuca longifolia) [86],…”

Section: 211resinas Epóxi Derivadas De óLeos Vegetais Epoxidadosunclassified

“…Os ácidos graxos presentes em óleos vegetais possuem ligações duplas entre átomos de carbono, que dão a possibilidade de modificar a sua estrutura química pelo método de epoxidação, que forma anéis oxirano onde anteriormente havia ligações (C = C) [88], [89]. A epoxidação de óleos vegetais pode ser realizada por diferentes reações [74], [90]; a mais comum é a reação de Prileschajew, conduzida na presença de perácidos (ácido peracético ou ácido performico) [91]. No entanto, a utilização de ácidos fortes pode conduzir à formação de subprodutos indesejáveis, tais como epóxidos de anel aberto [91].…”

Section: 211resinas Epóxi Derivadas De óLeos Vegetais Epoxidadosunclassified

“…Outras vias para a obtenção de EVOs inclui o uso de resinas de troca iônica [92], enzimas [93], peróxido de hidrogênio [94] catalizadores heterogêneos e outros [95], [12], [96]. Resinas epóxi do tipo diglicidil éter podem ser obtidas a partir de óleos vegetais pelo produto da condensação de monoglicéridos de óleo vegetal com epicloridrina na presença ou ausência de outro diol convencional (bisfenol) [74].…”

Section: 211resinas Epóxi Derivadas De óLeos Vegetais Epoxidadosunclassified

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Fabricação E Caracterização De Materiais Compósitos Resina Epóxi/Fibras De Bucha (Luffa Cylindrica)

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Vegetable oil-based epoxies

Cited by 9 publications

References 47 publications

Epoxidation of Methyl Esters as Valuable Biomolecules: Monitoring of Reaction

Epoxidation of Methyl Esters as Valuable Biomolecules: Monitoring of Reaction

MWCNTs-Reinforced Epoxidized Linseed Oil Plasticized Polylactic Acid Nanocomposite and Its Electroactive Shape Memory Behaviour

Fabricação E Caracterização De Materiais Compósitos Resina Epóxi/Fibras De Bucha (Luffa Cylindrica)

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