Adhesion and cohesion of epoxy-based industrial composite coatings

Wei, Hongyu; Xia, Jun; Zhou, Wanlin; Zhou, Laishui; Hussain, G.; Li, Qin; Ostrikov, Kostya Ken

doi:10.1016/j.compositesb.2020.108035

Cited by 175 publications

(91 citation statements)

References 116 publications

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“…It is a polymer with low surface energy and generally poor adhesion properties [ 6 ]. It is not compatible with hydrophilic fibers (natural, glass, metal) without a suitable surface treatment [ 6 , 7 , 8 , 9 , 10 ]. Problems with low adhesion between the matrix and the reinforcement can be solved by chemical treatment of fibers such as, e.g., silanization or plasma treatment or application of maleic anhydride-grafted polyethylene [ 5 , 7 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

New Method for Optimization of Polymer Powder Plasma Treatment for Composite Materials

et al. 2021

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This paper describes a newly developed testing method for determination of the adhesivity of a film sintered from thermoplastic powder. This method is based on the modified EN 15337 standard. Application of this method enables an effective development of thermoplastic composites with enhanced adhesion between reinforcement and matrix and/or high-quality joints between plastics and dissimilar materials. The proposed method was successfully tested on a series of polyethylene powders treated in the oxygen atmosphere for 0–1200 s. Adhesion to metal and glass substrates in dependence on treatment conditions is described along with powder wettability and X-ray photoelectron spectroscopy analysis. The results show an increase in adhesion to metal by 580% and to glass by 1670% for the longest treatment time, compared to a nontreated powder. Sintering of treated powders revealed a strong influence of treatment time on the melting process. The XPS analysis confirmed the formation of new oxygen groups (C–O, C=O, O–C=O). The method reveals a specific behavior of powders based on treatment conditions, which is crucial for the optimization of plasma treatment for the improved adhesion, applicability of polymer powders, and a development of composite materials.

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Section: Introductionmentioning

confidence: 99%

New Method for Optimization of Polymer Powder Plasma Treatment for Composite Materials

et al. 2021

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“…However, the increasing the ZrO 2 /Cr 2 O 3 NPs filler content more than 1.5 wt.% decreases the hardness as shown by loading 2.5 wt.%. This observation can be referred to the reduction of the cohesive strength of the coated film [13]. It is also clear from the obtained results of the adhesion test that, the force required to pull-off the blank epoxy coating is smaller than those in the composite epoxy coating formulations ( Table 2).…”

Section: Mechanical Properties and Anticorrosion Properties Of Zro 2 mentioning

confidence: 71%

“…Data represented in Table 1 record higher T g values for 1.5% and 2.5% ZrO 2 /Cr 2 O 3 NPs epoxy nanocomposites as 30.3 and 35.6 • C, respectively as compared with that neat epoxy. The increasing e in T g was attributed to the ability of the ZrO 2 /Cr 2 O 3 NPs filler to hinder the thermal motion of the epoxy hosting matrix chains [13].…”

Section: Surface Morphology and Thermal Characteristics Of Zro2/cr2o3mentioning

confidence: 99%

“…It is observed a significant increase in the pull-off adhesion upon loading ZrO 2 /Cr 2 O 3 NPs to the epoxy coating. The improvement in adhesion property of epoxy coating is a positive result can be attributed to the reinforcement provided by ZrO 2 /Cr 2 O 3 NPs, their good dispersion in epoxy coating, and they can facilitate the curing of epoxide rings with polyamines [13].…”

Section: Mechanical Properties and Anticorrosion Properties Of Zro 2 mentioning

confidence: 99%

“…The salt spray resistance data (Table 3 and Figure 8a-e) indicated that the corrosion resistance was significantly improved by the incorporation of ZrO 2 /Cr 2 O 3 NPs when compared to neat epoxy resin. This improvement which may be attributed to ZrO 2 /Cr 2 O 3 NPs are an inert lamellar filler, which orientate themselves parallel to the substrate surface and inhibiting corrosion by acting as a barrier element to water and oxygen from the environment [13,39].…”

Section: Coating Designmentioning

confidence: 99%

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Hybrid ZrO2/Cr2O3 Epoxy Nanocomposites as Organic Coatings for Steel

et al. 2020

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Mixed ZrO2 and Cr2O3 nanoparticles (NPs) were prepared using a liquid phase chemical technique and applied as reinforced filler for epoxy coatings with different weight ratios ranged from 0.5 to 2.5 wt.% to protect carbon steel from corrosion. The ZrO2/Cr2O3 NPs were used to catalyze the curing of the epoxy composite films to modify their mechanical and thermal characteristics on the steel surface. The crystalline structure, particle sizes, and surface morphologies of the prepared ZrO2 and Cr2O3 NPs were characterized to investigate their chemical composition and dispersion. The thermal stability of epoxy ZrO2/Cr2O3 coating films was investigated by thermogravimetric analysis (TGA), and the mechanical properties of the cured epoxy films were also studied. The dispersion of the Cr2O3/ZrO2 NPs into the epoxy matrix was investigated by scanning electron microscope (SEM), dynamic mechanical analysis (DMA) and TGA analyses. The results of salt spray test, used to investigate the anticorrosion performance of the epoxy coatings) were combined with thermal characteristics to confirm that the addition of Cr2O3/ZrO2 NPs significantly improved the corrosion resistance and the thermal stability of epoxy coating. The mechanical properties, adhesion, hardness, impact strength, flexibility and abrasion resistance were also improved with the addition of ZrO2/Cr2O3 NPs filler content.

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Thermal induced intrinsic self‐healing in epoxy based elastomer coatings provided by disulfide metathesis reactions

Eidi

Pedram

2022

J of Applied Polymer Sci

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Self-heal epoxy coatings have been prepared using sulfur-sulfur metathesis reaction as an intrinsic method for inducing self-healing property. Inducing of the self-healing property was carried out via insertion of the 3,3 0 -dithiodipropionic acid as chain extender functionalized with bisphenol A diglycidyl ether.According to the results, the prepared coatings were capable to recover their mechanical properties after damage and heal their surface as well. Noticeably, the healing yield of the coatings was about 43% and 76% for the samples containing 0.5 and 1.0 equivalents of chain extender, respectively. Furthermore, the mechanical properties of the self-heal coating were modified in the presence of the disulfide bonds from 0.22 MPa to 1.25 MPa. Regarding to the increment of the crosslinking density due to the presence of the sulfur containing chain expender, the average molecular weights between crosslinkings was reduced from 43.75 Â 10 3 g mol À1 in epoxy sample to 4.61 Â 10 3 g mol À1 in sulfur containing sample. The proposed facilitate method for inducing the self-healing property make it applicable to a wide range of epoxy coatings.

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Adhesion and cohesion of epoxy-based industrial composite coatings

Cited by 175 publications

References 116 publications

New Method for Optimization of Polymer Powder Plasma Treatment for Composite Materials

New Method for Optimization of Polymer Powder Plasma Treatment for Composite Materials

Hybrid ZrO2/Cr2O3 Epoxy Nanocomposites as Organic Coatings for Steel

Thermal induced intrinsic self‐healing in epoxy based elastomer coatings provided by disulfide metathesis reactions

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