High performance epoxy nanocomposite adhesive: Effect of nanofillers on adhesive strength, curing and degradation kinetics

Aradhana, Ruchi; Mohanty, Smita; Nayak, Sanjay K.

doi:10.1016/j.ijadhadh.2018.03.013

Cited by 75 publications

(20 citation statements)

References 37 publications

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“…However, the lower σ t and E values obtained for EPZ‐3.5 and EPZ‐6.5 might be due to the agglomeration and unreacted phase of ZnO nanoparticles as observed in the WAXD analysis discussed earlier. The formation of ZnO agglomerates led to insufficient interaction between the ZnO nanophase and matrix phase, resulting in decline of mechanical properties . Similar findings were also reported earlier wherein the formation of nanoparticle agglomerates reduced the interfacial contact area between the nanoparticle phase and matrix phase .…”

Section: Resultssupporting

confidence: 86%

Development of multifunctional polydimethylsiloxane (PDMS)‐epoxy‐zinc oxide nanocomposite coatings for marine applications

Verma

Das²,

Mohanty

et al. 2019

Polymers for Advanced Techs

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Multifunctional epoxy-polydimethylsiloxane nanocomposite coatings with antifouling and anticorrosion characteristics have been developed via in situ polymerization method at different loading (1, 3, and 6.5 wt.%) of ZnO nanoparticles to cater marine applications. A detailed comparative analysis has been carried out between epoxy-polydimethylsiloxane control (EPC) and ZnO-reinforced coatings to determine the influence of ZnO loading on various properties. The incorporation of ZnO in EPC led to increase in root mean square (RMS) roughness to 126.75 nm and improved hydrophobicity showing maximum contact angle of 123.5°with low surface energy of 19.75 mN/m of nanocomposite coating as compared with control coating. The differential scanning calorimetry (DSC) result indicated improved glass transition temperature of nanocomposite coatings with highest T g obtained at 83.69°C in case of 1 wt.% loading of ZnO. The increase in hydrophobicity of the system was accompanied by upgraded anticorrosion performance exhibiting 98.8% corrosion inhibition efficiency (CIE) as compared with control coating and lower corrosion rate of 0.12 × 10 −3 mm/year. The Taber abrasion resistance and pull-off adhesion strength results indicated an increment of 34.7% and 150.7%, respectively, in case of nanocomposite coating as compared with the control coating.The hardness of nanocomposite coatings was also improved, and maximum hardness was found to be 65.75 MPa for nanocomposite coating with 1 wt.% of ZnO.Our study showed that the nanocomposite coating was efficient in inhibiting accumulation of marine bacteria and preventing biofouling for more than 8 months. The developed environment-friendly and efficient nanocomposite material has a promising future as a high-performance anticorrosive and antifouling coating for marine applications. | MATERIALSEP resin, i.e., DGEBA, Araldite GY-251 with EP equivalent value ranging from 180 to 189 g/eq and EP value of 5.30 to 5.55 eq/Kg, and hardener triethylene tetra amine (TETA, Aradur HY-951) with amine value 24.04 g/eq were purchased from M/s. Huntsman Int Pvt Ltd, Mumbai, India. PDMS-hydroxy terminated (h-PDMS) with dynamic viscosity of 25 centistokes and density value 0.95 g/mL at temperature of 25°C and APTES (3-aminopropyltriethoxysilane), assay (99%) and density value of 0.946 g/mL at 25°C (lit.) were procured from M/s. Sigma Aldrich Pvt Ltd, India. ZnO nanoparticle with average particle size of approximately 20 nm were purchased from M/s. Sisco

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Section: Resultssupporting

confidence: 86%

Development of multifunctional polydimethylsiloxane (PDMS)‐epoxy‐zinc oxide nanocomposite coatings for marine applications

Verma

Das²,

Mohanty

et al. 2019

Polymers for Advanced Techs

Self Cite

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“…In the processing of thermosetting composites it is important to monitor the gelation properties, in particular the curing time, viscosity increase and thermal effects of this process [4]. The most of these reports concentrated on the effect of the addition of bentonite modified with ammonium salts on the gelation properties of epoxy nanocomposites [5,6]. Peila R. et al [7] reported that the addition of nanoclay modified with quaternary ammonium salts increased viscosity and accelerated the curing process.…”

Section: Wpływ Modyfikowanych Bentonitów Na Proces Sieciowania żYwicymentioning

confidence: 99%

Effect of modified bentonites on the crosslinking process of epoxy resin with alifphatic amine as curing agent

Oliwa

Bulanda

et al. 2019

Polimery

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In this work the influence of modified bentonites on the process of epoxy crosslinking with triethylenetetramine (TETA) was investigated. Bentonites (BS) modified with quaternary phosphonium (QPS) and ammonium (QAS) salts were used as a nanofiller in the epoxy matrix (EP) in the amounts of 1 and 3 wt %. Gel time of the compositions was investigated using rotational rheometer at 30, 45 and 60 °C and activation energies of the compositions were determined. The storage G' and loss G" moduli crossover criterion was used to determine the nanocomposites gel time variation. On the basis of the obtained results, it was found that the addition of modified aluminosilicates decreased the gel time of epoxy compositions at 30 and 45 °C, while at 60 °C it increased compared to unmodified epoxy resin. The obtained results indicate that the amount of modified aluminosilicate and the type of salt influence the reactivity of epoxy compositions. Among the tested systems, the most reactive was the composition of EP+3%BSQPS1, because the gel time at 30 °C and activation energy decreased by 1500 s and 8 J/mol, respectively, in relation to the unfilled EP resin. A more catalytic effect was observed in the case of bentonites modified with quaternary phosphonium salts, which may be associated with lower phosphorus electronegativity in relation to nitrogen and a lower viscosity of these systems.

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“…Compared to pristine CaCO 3 , ES can more largely contribute with cross-linking reactions, as verified by Saeb et al during isothermal kinetics analyses. ES also favors the formation of the hydrogen bonds which may drive the formation of higher performance composites [4,5,8,9,10,11,12,13,14,15,16].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Epoxy Resin: An Investigation of Eggshell as a Synergic Filler

et al. 2019

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Epoxy resin based on bisphenol A diglycidyl ether/anhydride methyl tetrahydrophthalic/2,4,6-tris(dimethylaminomethyl)phenol (DGEBA/MTHPA/DEH 35) was produced by magnetic stirring; chicken eggshell (ES) was added as cure improver. Thermal stability, cure parameters, mechanical properties, and fracture surface were investigated by thermogravimetry (TGA), differential scanning calorimetry (DSC), tensile experiments, and scanning electron microscopy (SEM). In general, the addition of ES slightly decreased the thermal stability, being T0.05 5% lower than that of the reference sample. The cure rate increased with the heating rates, while best results were obtained upon addition of neat membrane (M) from ES. Surprisingly, the mechanical properties were significantly improved with ES as well as with M, being the Young’s modulus 18% higher, the tensile strength 50% higher, and the deformation 35% higher than those of epoxy resin. SEM images showed that the synthetic compounds presented a smooth fracture surface, while the compounds with ES and M had a rougher surface with multiplane fractures, suggesting a fracture with higher energy absorption. In conclusion, epoxy/ES composites with better performance were produced, and effective tools are provided to control and attain in the future even better properties with ecological features.

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High performance epoxy nanocomposite adhesive: Effect of nanofillers on adhesive strength, curing and degradation kinetics

Cited by 75 publications

References 37 publications

Development of multifunctional polydimethylsiloxane (PDMS)‐epoxy‐zinc oxide nanocomposite coatings for marine applications

Development of multifunctional polydimethylsiloxane (PDMS)‐epoxy‐zinc oxide nanocomposite coatings for marine applications

Effect of modified bentonites on the crosslinking process of epoxy resin with alifphatic amine as curing agent

Optimization of Epoxy Resin: An Investigation of Eggshell as a Synergic Filler

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