Sustainable access to fully biobased epoxidized vegetable oil thermoset materials prepared by thermal or UV-cationic processes

Malburet, Samuel; Mauro, Chiara Di; Noè, Camilla; Mija, Alice; Sangermano, Marco; Graillot, Alain

doi:10.1039/d0ra07682a

Cited by 43 publications

(37 citation statements)

References 57 publications

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“…The ERHO-4.5, EGRP-5, and ERHO-6 were synthetized following the previously reported method. [28] Epoxidation conditions were adjusted for each vegetable oil in order to maintain the following molar ratio conditions C = C/Acetic acid/H 2 O 2 (35% w/w); 1/0.5/1.5eq with amberlite IR-120 loaded at 10 wt% with respect to (w.r.t) acetic acid and hydrogen peroxide weight. Briefly, the vegetable oil (1eq of double bonds), toluene, and the acetic acid (0.5eq w.r.t double bonds) were added to the reaction mixture.…”

Section: Synthesis Of Epoxidized Vegetable Oilsmentioning

confidence: 99%

“…[27] We also investigated and compared the thermomechanical properties obtained from either UV or hardenerfree thermal curing of different epoxidized vegetable oils (EVOs). [28] To the best authors' knowledge, previous work on cationic photocuring of bio-based thermosets has focused only on the curing kinetics and on the thermo-mechanical properties of the obtained networks. So, there remains a need for assessing the coating properties and for evaluating their exploitation in different applications.…”

Section: Introductionmentioning

confidence: 99%

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New UV‐Curable Anticorrosion Coatings from Vegetable Oils

Noè

Iannucci

Malburet³

et al. 2021

Macro Materials & Eng

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Bio‐based epoxy resins are attracting widespread interest in the field of polymer thermosets as environmentally friendly building block. In the present study, the feasibility of applying UV‐curable epoxidized vegetable oils (EVOs) as anti‐corrosion coating is investigated. Rheological characterization of EVOs is carried out, and their viscosity‐shear relationship is evaluated. The cationic UV‐curing of EVOs successfully gives rise to crosslinked materials with a wide range of thermo‐mechanical properties, evaluated by differential scanning calorimetric analysis and dynamic thermal mechanical analysis. A high epoxy‐group conversion, ranging from 93% to 99%, is always obtained. The thermal stability and surface properties of the bio‐based coatings, such as, pencil hardness, adhesion, solvent resistance, and contact angle, are analyzed. Moreover, the corrosion protection effectiveness of the coatings is characterized by potentiodynamic polarization and electrochemical impedance spectroscopy measurements. In addition, field emission scanning electron microscopy is used to assess the samples morphology after corrosion tests.

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Section: Synthesis Of Epoxidized Vegetable Oilsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New UV‐Curable Anticorrosion Coatings from Vegetable Oils

Noè

Iannucci

Malburet³

et al. 2021

Macro Materials & Eng

Self Cite

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“…This work demonstrated the possibility to tune the thermomechanical properties of the EVO thermosets by carefully selecting the starting vegetable oil. Higher double bond content in the raw materials resulted in higher epoxy index and improved thermo-mechanical properties [ 65 ].…”

Section: Cationic Photocurable Bio-based Epoxy Monomersmentioning

confidence: 99%

Cationic UV-Curing of Epoxidized Biobased Resins

2020

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Epoxy resins are among the most important building blocks for fabrication of thermosets for many different applications thanks to their superior thermo-mechanical properties and chemical resistance. The recent concerns on the environmental problems and the progressive depletion of petroleum feedstocks have drawn the research interest in finding biobased alternatives. Many curing techniques can be used to obtain the final crosslinked thermoset networks. The UV-curing technology can be considered the most environmentally friendly because of the absence of volatile organic compound (VOC) emissions and mild curing conditions. This review provides an overview of the state of the art of bio-based cationic UV-curable epoxy resins. Particular focus has been given to the sources of the bio-based epoxy monomers and the applications of the obtained products.

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“…Biolaminates are natural fiber-reinforced bio-based epoxy resins [ 1 , 2 , 3 ]. Vegetable oils obtained from soybeans and flaxseeds are suitable for producing epoxy groups with high functionality due to their relatively high iodine value and high unsaturated fatty acid content [ 4 , 5 , 6 ]. Recent evaluations have reported that bio-based epoxy resins synthesized from functionalized natural compounds may have comparable thermal and mechanical properties with commercial epoxy resins [ 2 , 4 , 6 , 7 , 8 , 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

“…Vegetable oils obtained from soybeans and flaxseeds are suitable for producing epoxy groups with high functionality due to their relatively high iodine value and high unsaturated fatty acid content [ 4 , 5 , 6 ]. Recent evaluations have reported that bio-based epoxy resins synthesized from functionalized natural compounds may have comparable thermal and mechanical properties with commercial epoxy resins [ 2 , 4 , 6 , 7 , 8 , 9 , 10 , 11 ]. The three main components of plant fibers are cellulose, lignin, and hemicellulose, where cellulose is responsible for the inherent strength and stability of the natural fibers, whereas hemicellulose contributes to their structure [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Hybrid Carbonized Plant Fibers Reinforced Bio-Based Epoxy Laminates

2021

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In this work, henequen and ixlte plant fibers were carbonized in a horizontal quartz tube furnace. Several carbonized and non-carbonized fiber fabric configurations were impregnated with a bio-based epoxy resin through the infusion process. The infrared spectra revealed characteristic bands of styrene instead of organic compounds, representing that the carbonization procedure was adequate to carbonize the plant fibers. The porosity volume ratio for the non-carbonized henequen laminates showed the highest number of voids >1.9%, and the rest of the composites had a similar void density between 1.2–1.7%. The storage modulus of the non-carbonized and carbonized henequen laminates resulted in 2268.5 MPa and 2092.1 MPa, respectively. The storage modulus of the carbonized ixtle laminates was 1541.4 MPa, which is 37.8% higher than the non-carbonized ixtle laminates and 12% higher than henequen composites. The laminates were subject to thermal shock cycling, and tomography scans revealed no alterations on the porosity level or in the cracks after the cycling procedure. Thermal shock cycling promoted the post-curing effect by increasing the glass transition temperature. The viscoelastic results showed a variation in the storage modulus when the carbonized fiber fabrics were located between natural fiber fabrics, which was attributed to more excellent compaction during the infusion process. Variations in the viscoelastic behavior were observed between the different types of natural fibers, which influenced the mechanical properties.

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Sustainable access to fully biobased epoxidized vegetable oil thermoset materials prepared by thermal or UV-cationic processes

Abstract: Beyond the need to find a non-toxic alternative to DiGlycidyl Ether of Bisphenol-A (DGEBA), the serious subject of non-epichlorohydrin epoxy resins production remains a crucial challenge that must be solved for the next epoxy resin generations.

Cited by 43 publications

References 57 publications

New UV‐Curable Anticorrosion Coatings from Vegetable Oils

New UV‐Curable Anticorrosion Coatings from Vegetable Oils

Cationic UV-Curing of Epoxidized Biobased Resins

Mechanical Properties of Hybrid Carbonized Plant Fibers Reinforced Bio-Based Epoxy Laminates

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