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Hanna Nosal - One of the best experts on this subject based on the ideXlab platform.

  • Synthesis and characterization of alkyd resins based on Camelina sativa oil, glycerol and selected epoxidized vegetable oils as functional modifiers
    Progress in Organic Coatings, 2016
    Co-Authors: Hanna Nosal, Marek Warza??a, Janusz Nowicki, Izabela Semeniuk, Ewa Sabura
    Abstract:

    Novel alkyd resins based on the Camelina sativa oil as a new Renewable Raw Material and glycerol as a polyol component were synthesized. Selected epoxidized vegetable oils (linseed oil and camelina oil) as new functional modifiers were used in the alcoholysis reaction with purified camelina oil. The influence of the added epoxidized linseed oil and epoxidized camelina oil on the course of alkyd resin synthesis and the properties of the final products were investigated. The glycerol-based alkyd resins with improved properties were produced.

  • Synthesis and characterization of alkyd resins based on Camelina sativa oil and polyglycerol
    Progress in Organic Coatings, 2015
    Co-Authors: Hanna Nosal, Marek Warzała, Janusz Nowicki, Ewa Nowakowska-bogdan, Magdalena Zarębska
    Abstract:

    A one pot synthesis of alkyd resins based on the Camelina sativa oil as a new Renewable Raw Material and on polyglycerols as polyols was carried out. The oligomerization of glycerol was conducted in the presence of LiOH (0.1wt%) at 245°C. The total content of diglycerol reached its maximum (about 33.5wt%) after 7h. The oligomerization product with no additional treatment was subjected to the alcoholysis reaction with purified camelina oil. The alkyd resin was obtained after polycondensation of the alcoholysis products with phthalic and maleic anhydrides at 230–250°C. A real possibility was determined for the synthesis of alkyd resins with some properties similar to those which can be found in equivalent products manufactured on the basis of semi drying oil and pentaerythritol like flexibility and drying time.

Janusz Nowicki - One of the best experts on this subject based on the ideXlab platform.

  • Synthesis and characterization of alkyd resins based on Camelina sativa oil, glycerol and selected epoxidized vegetable oils as functional modifiers
    Progress in Organic Coatings, 2016
    Co-Authors: Hanna Nosal, Marek Warza??a, Janusz Nowicki, Izabela Semeniuk, Ewa Sabura
    Abstract:

    Novel alkyd resins based on the Camelina sativa oil as a new Renewable Raw Material and glycerol as a polyol component were synthesized. Selected epoxidized vegetable oils (linseed oil and camelina oil) as new functional modifiers were used in the alcoholysis reaction with purified camelina oil. The influence of the added epoxidized linseed oil and epoxidized camelina oil on the course of alkyd resin synthesis and the properties of the final products were investigated. The glycerol-based alkyd resins with improved properties were produced.

  • Synthesis and characterization of alkyd resins based on Camelina sativa oil and polyglycerol
    Progress in Organic Coatings, 2015
    Co-Authors: Hanna Nosal, Marek Warzała, Janusz Nowicki, Ewa Nowakowska-bogdan, Magdalena Zarębska
    Abstract:

    A one pot synthesis of alkyd resins based on the Camelina sativa oil as a new Renewable Raw Material and on polyglycerols as polyols was carried out. The oligomerization of glycerol was conducted in the presence of LiOH (0.1wt%) at 245°C. The total content of diglycerol reached its maximum (about 33.5wt%) after 7h. The oligomerization product with no additional treatment was subjected to the alcoholysis reaction with purified camelina oil. The alkyd resin was obtained after polycondensation of the alcoholysis products with phthalic and maleic anhydrides at 230–250°C. A real possibility was determined for the synthesis of alkyd resins with some properties similar to those which can be found in equivalent products manufactured on the basis of semi drying oil and pentaerythritol like flexibility and drying time.

Aleksandar D Marinkovic - One of the best experts on this subject based on the ideXlab platform.

  • self healing capability of novel eco epoxy adhesives based on the modified tannic acid on al adherends tested in a single lap joint
    International Journal of Adhesion and Adhesives, 2021
    Co-Authors: Natasa Z Tomic, Mohamed Nasr Saleh, Aleksandar D Marinkovic, Milad Saeedifar, Sofia Teixeira De Freitas
    Abstract:

    Abstract The aim of this paper is to study the self-healing capability of fractured Al joints bonded with novel eco-epoxide adhesives synthesized from a bio-Renewable Raw Material (tannic acid – TA). Two synthesized eco-epoxy components based on TA, (A) glycidyl ether and (B) glycidyl phosphate ester of TA, were used as a replacement for the toxic epoxy component based on Bisphenol A. The effect of the eco-epoxy components on the self-healing capability was measured as a recovery of shear strength in a single lap joint (SLJ) test after complete failure, which was compared to the reference epoxy (R). The self-healing procedure was performed in an autoclave at 180°C for 2 h and 2 bars. A combination of two monitoring techniques, Digital Image Correlation (DIC) and Acoustic Emission (AE), was used to monitor the strain distribution and damage propagation in the SLJ. The measured shear stress of A and B adhesives in the SLJ had values in the range of 2.3-5.1 MPa. A fracture analysis showed complete adhesive failure for all the tested adhesives, which was not affected by the self-healing process. Out of all adhesives, only the A adhesive demonstrated the capability to heal. The recovery of the shear strength for adhesive A was higher than 50% of the virgin case. In addition, the AE analysis managed to capture a clear distinction between the signals for the virgin and the self-healed tests for adhesive A. Results obtained in this study highlighted the promising potential of using bio-based epoxy adhesives in structural adhesive bonding with the possibility of using self-healing in the recovery of the strength of such bonded joints.

  • enhanced interface adhesion by novel eco epoxy adhesives based on the modified tannic acid on al and cfrp adherends
    Polymers, 2020
    Co-Authors: Natasa Z Tomic, Mohamed Nasr Saleh, Sofia Teixeira De Freitas, Andreja živkovic, Marija M Vuksanovic, J A Poulis, Aleksandar D Marinkovic
    Abstract:

    This paper presents a new process for obtaining eco-epoxide adhesives synthesized from bio-Renewable Raw Material (tannic acid-TA) and used for bonding lightweight Materials (aluminum (Al) and carbon fiber reinforced polymer (CFRP)). Two synthesized bio-epoxy components based on TA, (A) glycidyl ether and (B) glycidyl phosphate ester of TA, were used as a replacement for the toxic epoxy component based on Bisphenol A. The effect of eco-epoxy components on the interface adhesion was measured by the determination of adhesion parameter b, which was compared to the reference epoxy (REF). The increase of adhesion parameter b was 77.5% for A and 151.5% for B. The adhesion of both eco-adhesives was tested using the bell peel test (BPT) with the Al and CFRP adherends. When compared to REF, the average peel load for B was 17.6% (39.3%) and 58.3% (176.9%) higher for the Al and CFRP adherends, respectively. Complete adhesion failure of REF reflected the weak adhesion to both Al and CFRP, which was improved by the addition of eco-epoxy components A and B showing the presence of cohesive failure. The microhardness testing method of interface adhesion was proven to be a fast and reliable testing method, providing a qualitative indication in adhesive selection.

Magdalena Zarębska - One of the best experts on this subject based on the ideXlab platform.

  • Synthesis and characterization of alkyd resins based on Camelina sativa oil and polyglycerol
    Progress in Organic Coatings, 2015
    Co-Authors: Hanna Nosal, Marek Warzała, Janusz Nowicki, Ewa Nowakowska-bogdan, Magdalena Zarębska
    Abstract:

    A one pot synthesis of alkyd resins based on the Camelina sativa oil as a new Renewable Raw Material and on polyglycerols as polyols was carried out. The oligomerization of glycerol was conducted in the presence of LiOH (0.1wt%) at 245°C. The total content of diglycerol reached its maximum (about 33.5wt%) after 7h. The oligomerization product with no additional treatment was subjected to the alcoholysis reaction with purified camelina oil. The alkyd resin was obtained after polycondensation of the alcoholysis products with phthalic and maleic anhydrides at 230–250°C. A real possibility was determined for the synthesis of alkyd resins with some properties similar to those which can be found in equivalent products manufactured on the basis of semi drying oil and pentaerythritol like flexibility and drying time.

Ewa Sabura - One of the best experts on this subject based on the ideXlab platform.