TY  - JOUR
AU  - Tomić, Nataša Z.
AU  - Saeedifar, Milad
AU  - Saleh, Mohamed Nasr
AU  - Marinković, Aleksandar
AU  - Zarouchas, Dimitrios
AU  - Teixeira de Freitas, Sofia
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5369
AB  - The aim of this research was to investigate the self-healing potential of damaged Al joints when bonded using novel eco-epoxide adhesives derived from tannic acid (TA). Two eco-epoxy components based on TA, (A) glycidyl ether and (B) glycidyl phosphate ester of TA, were produced. The effect of the eco-epoxy components on the self-healing ability was assessed in terms of the energy dissipation recovery after partial failure in a double cantilever beam (DCB) test, which was compared to the reference epoxy (R). The self-healing process required 2 h and 2 bars in an autoclave at 180 °C. Techniques such as DSC, FTIR and DMA showed residual activity and potential self-healing capability of the used adhesives. 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 DCB specimens. The healing index for adhesives R, B and A was found to be 8.9%, 3.0%, and 82.5% respectively. The findings of this work highlighted the potential of using bio-based epoxy adhesives in structural adhesive bonding, as well as the prospect of utilizing their self-healing ability to restore the strength of such bonded parts.
PB  - Elsevier Ltd
T2  - Polymer Testing
T1  - Synthesis and characterization of novel eco-epoxy adhesives based on the modified tannic acid for self-healing joints
SP  - 107444
VL  - 106
DO  - 10.1016/j.polymertesting.2021.107444
ER  - 

@article{
author = "Tomić, Nataša Z. and Saeedifar, Milad and Saleh, Mohamed Nasr and Marinković, Aleksandar and Zarouchas, Dimitrios and Teixeira de Freitas, Sofia",
year = "2022",
abstract = "The aim of this research was to investigate the self-healing potential of damaged Al joints when bonded using novel eco-epoxide adhesives derived from tannic acid (TA). Two eco-epoxy components based on TA, (A) glycidyl ether and (B) glycidyl phosphate ester of TA, were produced. The effect of the eco-epoxy components on the self-healing ability was assessed in terms of the energy dissipation recovery after partial failure in a double cantilever beam (DCB) test, which was compared to the reference epoxy (R). The self-healing process required 2 h and 2 bars in an autoclave at 180 °C. Techniques such as DSC, FTIR and DMA showed residual activity and potential self-healing capability of the used adhesives. 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 DCB specimens. The healing index for adhesives R, B and A was found to be 8.9%, 3.0%, and 82.5% respectively. The findings of this work highlighted the potential of using bio-based epoxy adhesives in structural adhesive bonding, as well as the prospect of utilizing their self-healing ability to restore the strength of such bonded parts.",
publisher = "Elsevier Ltd",
journal = "Polymer Testing",
title = "Synthesis and characterization of novel eco-epoxy adhesives based on the modified tannic acid for self-healing joints",
pages = "107444",
volume = "106",
doi = "10.1016/j.polymertesting.2021.107444"
}

Tomić, N. Z., Saeedifar, M., Saleh, M. N., Marinković, A., Zarouchas, D.,& Teixeira de Freitas, S.. (2022). Synthesis and characterization of novel eco-epoxy adhesives based on the modified tannic acid for self-healing joints. in Polymer Testing
Elsevier Ltd., 106, 107444.
https://doi.org/10.1016/j.polymertesting.2021.107444

Tomić NZ, Saeedifar M, Saleh MN, Marinković A, Zarouchas D, Teixeira de Freitas S. Synthesis and characterization of novel eco-epoxy adhesives based on the modified tannic acid for self-healing joints. in Polymer Testing. 2022;106:107444.
doi:10.1016/j.polymertesting.2021.107444 .

Tomić, Nataša Z., Saeedifar, Milad, Saleh, Mohamed Nasr, Marinković, Aleksandar, Zarouchas, Dimitrios, Teixeira de Freitas, Sofia, "Synthesis and characterization of novel eco-epoxy adhesives based on the modified tannic acid for self-healing joints" in Polymer Testing, 106 (2022):107444,
https://doi.org/10.1016/j.polymertesting.2021.107444 . .

TY  - JOUR
AU  - Tomić, Nataša Z.
AU  - Saleh, Mohamed Nasr
AU  - Saeedifar, Milad
AU  - Marinković, Aleksandar
AU  - Teixeira de Freitas, Sofia
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5360
AB  - 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.
PB  - Elsevier Ltd.
T2  - International Journal of Adhesion and Adhesives
T1  - Self-healing capability of novel eco-epoxy adhesives based on the modified tannic acid on Al adherends tested in a single lap joint
SP  - 103013
VL  - 117
DO  - 10.1016/j.ijadhadh.2021.103013
ER  - 

@article{
author = "Tomić, Nataša Z. and Saleh, Mohamed Nasr and Saeedifar, Milad and Marinković, Aleksandar and Teixeira de Freitas, Sofia",
year = "2022",
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.",
publisher = "Elsevier Ltd.",
journal = "International Journal of Adhesion and Adhesives",
title = "Self-healing capability of novel eco-epoxy adhesives based on the modified tannic acid on Al adherends tested in a single lap joint",
pages = "103013",
volume = "117",
doi = "10.1016/j.ijadhadh.2021.103013"
}

Tomić, N. Z., Saleh, M. N., Saeedifar, M., Marinković, A.,& Teixeira de Freitas, S.. (2022). Self-healing capability of novel eco-epoxy adhesives based on the modified tannic acid on Al adherends tested in a single lap joint. in International Journal of Adhesion and Adhesives
Elsevier Ltd.., 117, 103013.
https://doi.org/10.1016/j.ijadhadh.2021.103013

Tomić NZ, Saleh MN, Saeedifar M, Marinković A, Teixeira de Freitas S. Self-healing capability of novel eco-epoxy adhesives based on the modified tannic acid on Al adherends tested in a single lap joint. in International Journal of Adhesion and Adhesives. 2022;117:103013.
doi:10.1016/j.ijadhadh.2021.103013 .

Tomić, Nataša Z., Saleh, Mohamed Nasr, Saeedifar, Milad, Marinković, Aleksandar, Teixeira de Freitas, Sofia, "Self-healing capability of novel eco-epoxy adhesives based on the modified tannic acid on Al adherends tested in a single lap joint" in International Journal of Adhesion and Adhesives, 117 (2022):103013,
https://doi.org/10.1016/j.ijadhadh.2021.103013 . .

TY  - JOUR
AU  - Tomić, Nataša
AU  - Saleh, Mohamed Nasr
AU  - Vuksanović, Marija M.
AU  - Egelja, Adela
AU  - Obradović, Vera
AU  - Marinković, Aleksandar
AU  - Jančić-Heinemann, Radmila
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4931
AB  - The goal of this study was to investigate the effect of the structure of Mn-Al layered double hydroxide (LDH) on the adhesion behavior of composite adhesives on two Al alloys (L3005 and L8079). The composite adhesives were made out of the UV-curing Bisphenol A glycidylmethacrylate/triethylene glycol dimethacrylate (BT) as polymer matrix and the addition of 1, 3, and 5 wt. % of Mn-Al LDH as adhesion enhancers. Adhesion was evaluated by using the micro Vickers hardness testing procedure. The wetting angle of composite adhesives to the Al substrates was measured and compared to the adhesion parameter b obtained from the microhardness tests. The highest increase in adhesion was observed for BT with 5 wt. % of Mn-Al LDH on L3005 substrate, which was more than 15 times higher than the adhesion for the neat BT. The morphological segregation of composite adhesives after the contact with Al substrates was examined by optical microscopy and a higher compatibility of Mn-Al LDH particles with L3005 substrate was found. The methods used for the adhesion properties assessment suggested that the Mn-Al LDH was the best adhesion enhancer of the BT matrix for L3005 substrate containing a higher content of Mn and surface hydroxyl groups.
T2  - Polymers
T1  - Tailored Adhesion Properties of Acrylate Adhesives on Al Alloys by the Addition of Mn-Al-LDH
IS  - 9
VL  - 13
DO  - 10.3390/polym13091525
ER  - 

@article{
author = "Tomić, Nataša and Saleh, Mohamed Nasr and Vuksanović, Marija M. and Egelja, Adela and Obradović, Vera and Marinković, Aleksandar and Jančić-Heinemann, Radmila",
year = "2021",
abstract = "The goal of this study was to investigate the effect of the structure of Mn-Al layered double hydroxide (LDH) on the adhesion behavior of composite adhesives on two Al alloys (L3005 and L8079). The composite adhesives were made out of the UV-curing Bisphenol A glycidylmethacrylate/triethylene glycol dimethacrylate (BT) as polymer matrix and the addition of 1, 3, and 5 wt. % of Mn-Al LDH as adhesion enhancers. Adhesion was evaluated by using the micro Vickers hardness testing procedure. The wetting angle of composite adhesives to the Al substrates was measured and compared to the adhesion parameter b obtained from the microhardness tests. The highest increase in adhesion was observed for BT with 5 wt. % of Mn-Al LDH on L3005 substrate, which was more than 15 times higher than the adhesion for the neat BT. The morphological segregation of composite adhesives after the contact with Al substrates was examined by optical microscopy and a higher compatibility of Mn-Al LDH particles with L3005 substrate was found. The methods used for the adhesion properties assessment suggested that the Mn-Al LDH was the best adhesion enhancer of the BT matrix for L3005 substrate containing a higher content of Mn and surface hydroxyl groups.",
journal = "Polymers",
title = "Tailored Adhesion Properties of Acrylate Adhesives on Al Alloys by the Addition of Mn-Al-LDH",
number = "9",
volume = "13",
doi = "10.3390/polym13091525"
}

Tomić, N., Saleh, M. N., Vuksanović, M. M., Egelja, A., Obradović, V., Marinković, A.,& Jančić-Heinemann, R.. (2021). Tailored Adhesion Properties of Acrylate Adhesives on Al Alloys by the Addition of Mn-Al-LDH. in Polymers, 13(9).
https://doi.org/10.3390/polym13091525

Tomić N, Saleh MN, Vuksanović MM, Egelja A, Obradović V, Marinković A, Jančić-Heinemann R. Tailored Adhesion Properties of Acrylate Adhesives on Al Alloys by the Addition of Mn-Al-LDH. in Polymers. 2021;13(9).
doi:10.3390/polym13091525 .

Tomić, Nataša, Saleh, Mohamed Nasr, Vuksanović, Marija M., Egelja, Adela, Obradović, Vera, Marinković, Aleksandar, Jančić-Heinemann, Radmila, "Tailored Adhesion Properties of Acrylate Adhesives on Al Alloys by the Addition of Mn-Al-LDH" in Polymers, 13, no. 9 (2021),
https://doi.org/10.3390/polym13091525 . .

TY  - JOUR
AU  - Saleh, Mohamed Nasr
AU  - Tomić, Nataša
AU  - Marinković, Aleksandar
AU  - de Freitas, Sofia Teixeira
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4922
AB  - Two synthesized eco-epoxy components based on TA: (A) glycidyl ether and (B) glycidyl phosphate ester, are used, as a replacement for the Bisphenol A (BPA) based epoxy component, for bonding aluminum (Al) and carbon fiber reinforced polymer (CFRP). Their effect on the mode I fracture toughness (G(I)) is evaluated by Double Cantilever Beam (DCB) testing while using Digital Image Correlation (DIC) for in-situ crack tip monitoring. Compared to the reference adhesive, an improvement of (G(I)) of Al (43%) and CFRP (100%) is obtained when using adhesive B. Moreover, regardless of the adherend material, a stick-slip pattern of crack growth is observed. Weak adhesion of the reference adhesive leads to an adhesive failure vs. a cohesive-adhesive failure in the case of adhesive B. On the contrary, the modification of adhesive A has an adverse effect on the G(I) of Al (-33%) and CFRP (-78%) as opposed to their reference counterparts.
T2  - Polymer Testing
T1  - The effect of modified tannic acid (TA) eco-epoxy adhesives on mode I fracture toughness of bonded joints
VL  - 96
DO  - 10.1016/j.polymertesting.2021.107122
ER  - 

@article{
author = "Saleh, Mohamed Nasr and Tomić, Nataša and Marinković, Aleksandar and de Freitas, Sofia Teixeira",
year = "2021",
abstract = "Two synthesized eco-epoxy components based on TA: (A) glycidyl ether and (B) glycidyl phosphate ester, are used, as a replacement for the Bisphenol A (BPA) based epoxy component, for bonding aluminum (Al) and carbon fiber reinforced polymer (CFRP). Their effect on the mode I fracture toughness (G(I)) is evaluated by Double Cantilever Beam (DCB) testing while using Digital Image Correlation (DIC) for in-situ crack tip monitoring. Compared to the reference adhesive, an improvement of (G(I)) of Al (43%) and CFRP (100%) is obtained when using adhesive B. Moreover, regardless of the adherend material, a stick-slip pattern of crack growth is observed. Weak adhesion of the reference adhesive leads to an adhesive failure vs. a cohesive-adhesive failure in the case of adhesive B. On the contrary, the modification of adhesive A has an adverse effect on the G(I) of Al (-33%) and CFRP (-78%) as opposed to their reference counterparts.",
journal = "Polymer Testing",
title = "The effect of modified tannic acid (TA) eco-epoxy adhesives on mode I fracture toughness of bonded joints",
volume = "96",
doi = "10.1016/j.polymertesting.2021.107122"
}

Saleh, M. N., Tomić, N., Marinković, A.,& de Freitas, S. T.. (2021). The effect of modified tannic acid (TA) eco-epoxy adhesives on mode I fracture toughness of bonded joints. in Polymer Testing, 96.
https://doi.org/10.1016/j.polymertesting.2021.107122

Saleh MN, Tomić N, Marinković A, de Freitas ST. The effect of modified tannic acid (TA) eco-epoxy adhesives on mode I fracture toughness of bonded joints. in Polymer Testing. 2021;96.
doi:10.1016/j.polymertesting.2021.107122 .

Saleh, Mohamed Nasr, Tomić, Nataša, Marinković, Aleksandar, de Freitas, Sofia Teixeira, "The effect of modified tannic acid (TA) eco-epoxy adhesives on mode I fracture toughness of bonded joints" in Polymer Testing, 96 (2021),
https://doi.org/10.1016/j.polymertesting.2021.107122 . .

TY  - JOUR
AU  - Tomić, Nataša
AU  - Saleh, Mohamed Nasr
AU  - de Freitas, Sofia Teixeira
AU  - Zivković, Andreja
AU  - Vuksanović, Marija M.
AU  - Poulis, Johannes A.
AU  - Marinković, Aleksandar
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4385
AB  - 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 parameterb, which was compared to the reference epoxy (REF). The increase of adhesion parameterbwas 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.
PB  - MDPI, Basel
T2  - Polymers
T1  - Enhanced Interface Adhesion by Novel Eco-Epoxy Adhesives Based on the Modified Tannic Acid on Al and CFRP Adherends
IS  - 7
VL  - 12
DO  - 10.3390/polym12071541
ER  - 

@article{
author = "Tomić, Nataša and Saleh, Mohamed Nasr and de Freitas, Sofia Teixeira and Zivković, Andreja and Vuksanović, Marija M. and Poulis, Johannes A. and Marinković, Aleksandar",
year = "2020",
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 parameterb, which was compared to the reference epoxy (REF). The increase of adhesion parameterbwas 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.",
publisher = "MDPI, Basel",
journal = "Polymers",
title = "Enhanced Interface Adhesion by Novel Eco-Epoxy Adhesives Based on the Modified Tannic Acid on Al and CFRP Adherends",
number = "7",
volume = "12",
doi = "10.3390/polym12071541"
}

Tomić, N., Saleh, M. N., de Freitas, S. T., Zivković, A., Vuksanović, M. M., Poulis, J. A.,& Marinković, A.. (2020). Enhanced Interface Adhesion by Novel Eco-Epoxy Adhesives Based on the Modified Tannic Acid on Al and CFRP Adherends. in Polymers
MDPI, Basel., 12(7).
https://doi.org/10.3390/polym12071541

Tomić N, Saleh MN, de Freitas ST, Zivković A, Vuksanović MM, Poulis JA, Marinković A. Enhanced Interface Adhesion by Novel Eco-Epoxy Adhesives Based on the Modified Tannic Acid on Al and CFRP Adherends. in Polymers. 2020;12(7).
doi:10.3390/polym12071541 .

Tomić, Nataša, Saleh, Mohamed Nasr, de Freitas, Sofia Teixeira, Zivković, Andreja, Vuksanović, Marija M., Poulis, Johannes A., Marinković, Aleksandar, "Enhanced Interface Adhesion by Novel Eco-Epoxy Adhesives Based on the Modified Tannic Acid on Al and CFRP Adherends" in Polymers, 12, no. 7 (2020),
https://doi.org/10.3390/polym12071541 . .