Correlating the Photophysical Properties with the Cure Index of Epoxy Nanocomposite Coatings

Abdi, Ali Ashtiani; Jouyandeh, Maryam; Vahabi, Henri; Shabanian, Meisam; Lafon-Pham, Dominique; Gabrion, Xavier; Laheurte, Pascal; Nahavandi, Alireza Mahmoudi; Saeb, Mohammad Reza

doi:10.1007/s10904-020-01828-8

Cited by 8 publications

(7 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Table 1 , addition of Mica and Mica-IM into the epoxy system and curing in DSC at 5 °C min −1 led to the Poor cure state, which is probably due to the insufficient energy available in the system which could energize curing moieties to be crosslinked [ 57 , 58 ]. Once heating rates increased to 10 and subsequently to 15 °C min −1 , the Mica and Mica-IM were cured in a wider temperature interval and released more heat, resulting in a shift from the Poor to Good state [ 59 ].…”

Section: Resultsmentioning

confidence: 99%

Epoxy/Ionic Liquid-Modified Mica Nanocomposites: Network Formation–Network Degradation Correlation

et al. 2021

Self Cite

View full text Add to dashboard Cite

We synthesized pristine mica (Mica) and N-octadecyl-N’-octadecyl imidazolium iodide (IM) modified mica (Mica-IM), characterized it, and applied it at 0.1–5.0 wt.% loading to prepare epoxy nanocomposites. Dynamic differential scanning calorimetry (DSC) was carried out for the analysis of the cure potential and kinetics of epoxy/Mica and epoxy/Mica-IM curing reaction with amine curing agents at low loading of 0.1 wt.% to avoid particle aggregation. The dimensionless Cure Index (CI) was used for qualitative analysis of epoxy crosslinking in the presence of Mica and Mica-IM, while qualitative cure behavior and kinetics were studied by using isoconversional methods. The results indicated that both Mica and Mica-IM improved the curability of epoxy system from a Poor to Good state when varying the heating rate in the interval of 5–15 °C min−1. The isoconversional methods suggested a lower activation energy for epoxy nanocomposites with respect to the blank epoxy; thus, Mica and Mica-IM improved crosslinking of epoxy. The higher order of autocatalytic reaction for epoxy/Mica-IM was indicative of the role of liquid crystals in the epoxide ring opening. The glass transition temperature for nanocomposites containing Mica and Mica-IM was also lower than the neat epoxy. This means that nanoparticles participated the reaction because of being reactive, which decelerated segmental motion of the epoxy chains. The kinetics of the thermal decomposition were evaluated for the neat and mica incorporated epoxy nanocomposites epoxy with varying Mica and Mica-IM amounts in the system (0.5, 2.0 and 5.0 wt.%) and heating rates. The epoxy/Mica-IM at 2.0 wt.% of nanoparticle showed the highest thermal stability, featured by the maximum value of activation energy devoted to the assigned system. The kinetics of the network formation and network degradation were correlated to demonstrate how molecular-level transformations can be viewed semi-experimentally.

show abstract

Section: Resultsmentioning

confidence: 99%

Epoxy/Ionic Liquid-Modified Mica Nanocomposites: Network Formation–Network Degradation Correlation

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…[30][31][32][33] On the basis of the CI values, the curing state is classied into three ratings: Excellent (DT* < CI < DH*), Good (CI > DH*), and Poor (CI < DT*). 34,35 As shown in Table 2, EP/FA-bis-DOPO-2.5 exhibited excellent curing state, and EP/FA-bis-DOPO-5.0 showed good curing state, because FAbis-DOPO could participate in the curing reaction with the DGEBA pre-polymers. Owing to the excellent or good curing state, it is expected that FA-bis-DOPO will endow the cured thermosets with good ame retardancy, high mechanical property and transparency.…”

Section: Resultsmentioning

confidence: 96%

“…Owing to the excellent or good curing state, it is expected that FA-bis-DOPO will endow the cured thermosets with good ame retardancy, high mechanical property and transparency. 34 FA-bis-DOPO was used as a co-curing agent for ame retardant epoxy thermosets. The photographs of the cured epoxy thermosets are given in Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A bio-based phosphaphenanthrene-containing derivative modified epoxy thermosets with good flame retardancy, high mechanical properties and transparency

Wei

Nie

et al. 2021

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…Although AgNWs offer numerous advantages, they have several limitations such as poor adhesion to the coating substrate, high contact resistance at the wire/wire junction, surface roughness, and oxidation issues. Various approaches, including mechanical pressing [24,25], encapsulating AgNWs with other materials [26], and using adhesion promoters [22,27,28], have been adopted to improve the adhesion of AgNWs or other nanomaterials to the coating substrate.…”

Section: Introductionmentioning

confidence: 99%

(3-Aminopropyl)Triethoxysilane-Modified Silver Nanowire Network with Strong Adhesion to Coating Substrates for Highly Transparent Electrodes

et al. 2021

View full text Add to dashboard Cite

In this study, adhesion improved silver nanowires (AgNWs) conducting film was produced via the meniscus dragging deposition method. In order to improve adhesion of AgNWs films, the AgNWs were surface-modified with (3-aminopropyl)triethoxysilane (APTES) and coated over the pristine AgNWs networked film. Based on this strategy, the positively charged amine groups of the APTES-AgNWs and the negatively charged hydroxyl groups of the substrates formed electrostatic bonds, improving the adhesion between the AgNWs and substrates without sacrificing conductivity. AgNWs films on the rigid and flexible substrates were characterized using various analytical techniques. AgNWs networked film exhibited a sheet resistance of 6–22 Ω/sq at the transmittance at 550 nm, corresponding to 74–86% transmittance, confirming promising transparent electrodes. Adhesion of AgNWs film is confirmed based on a peel-off test and AgNWs film maintained a good conductivity even after several peel-off tests.

show abstract

Correlating the Photophysical Properties with the Cure Index of Epoxy Nanocomposite Coatings

Cited by 8 publications

References 66 publications

Epoxy/Ionic Liquid-Modified Mica Nanocomposites: Network Formation–Network Degradation Correlation

Epoxy/Ionic Liquid-Modified Mica Nanocomposites: Network Formation–Network Degradation Correlation

A bio-based phosphaphenanthrene-containing derivative modified epoxy thermosets with good flame retardancy, high mechanical properties and transparency

(3-Aminopropyl)Triethoxysilane-Modified Silver Nanowire Network with Strong Adhesion to Coating Substrates for Highly Transparent Electrodes

Contact Info

Product

Resources

About