Preparation of epoxy monoliths via chemically induced phase separation

Luo, Yu-Shun; Cheng, Kuo‐Chung; Wu, Ching-Lin; Wang, Chiu-Ya; Tsai, Teh-Hua; Wang, Da-Ming

doi:10.1007/s00396-013-2926-9

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…Recently, metal components used in the automotive, aerospace, and microelectronics industries are increasingly replaced by polymer and composite materials. − At the same time, the importance of adhesives and adhesion technology has increased due to the diversity of used materials. − This accelerating trend requires a new reliable technology, including surface modification methods for dissimilar materials bonding. − In contrast to the intensive studies of epoxy monoliths as column fillers and separators for high-performance separation systems, − we can find no report regarding the application of epoxy monolith for adhesion in the literature. Our preliminary results revealed that epoxy monolith was available for bonding of a stainless steel (SUS430) plate and thermoplastics. , In this study, we demonstrate the validity of the epoxy monolith bonding for dissimilar material bonding between various metals and polymers.…”

Section: Introductionmentioning

confidence: 99%

Dissimilar Materials Bonding Using Epoxy Monolith

et al. 2018

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The epoxy monolith with a highly porous structure is fabricated by the thermal curing of 2,2-bis(4-glycidyloxyphenyl)propane and 4,4′-methylenebis(cyclohexylamine) in the presence of poly(ethylene glycol) as the porogen via polymerization-induced phase separation. In this study, we demonstrated a new type of dissimilar material bonding method for various polymers and metals coated with the epoxy monolith. On the basis of scanning electron microscopy (SEM) observations, the pore size and number of epoxy monoliths were evaluated to be 1.1–114 μm and 8.7–48 200 mm –2 , respectively, depending on the ratio of the epoxy resin and cross-linking agent used for the monolith fabrication. Various kinds of thermoplastics, such as polyethylene, polypropylene, polyoxymethylene, acrylonitrile–butadiene–styrene copolymer, polycarbonate bisphenol-A, and poly(ethylene terephthalate), were bonded to the monolith-modified metal plates by thermal welding. The bond strength for the single lap-shear tensile test of stainless steel and copper plates with the thermoplastics was in the range of 1.2–7.5 MPa, which was greater than the bond strength value for each bonding system without monolith modification. The SEM observation of fractured test pieces directly confirmed an anchor effect on this bonding system. The elongated deformation of the plastics that filled in the pores of the epoxy monolith, was observed. It was concluded that the bond strength significantly depended on the intrinsic strength of the used thermoplastics. The epoxy monolith bonding of hard plastics, such as polystyrene and poly(methyl methacrylate), was performed by the additional use of adhesives, solvents, and a reactive monomer. The epoxy monolith sheets were also successfully fabricated and applied to dissimilar material bonding.

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Section: Introductionmentioning

confidence: 99%

Dissimilar Materials Bonding Using Epoxy Monolith

et al. 2018

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“…It has been shown in the literature 10,18 that the properties of the final structural electrolytes are affected by the microstructure of the polymer phase. As epoxies have the ability to form bicontinuous structures via polymerization induced phase separation, [20][21][22][23] this approach has been used to produce porous monoliths for chromatography and biomedical applications. 24 Mixing epoxy resin with other compounds does not, however, 4 always result in a bicontinuous structure and there is no simple method to predict the phase behavior.…”

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confidence: 99%

Composition as a Means To Control Morphology and Properties of Epoxy Based Dual-Phase Structural Electrolytes

et al. 2014

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This document is the Accepted Manuscript version of a Published Work that appeared in nal form in Journal of physical chemistry C, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see http://dx.doi.org/10.1021/jp507952bAdditional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. increasing lithium salt concentration. The miscibility of the epoxy system with the electrolyte was also improved by substitution of EMIM-TFSI with an equal weight of an aprotic organic solvent, propylene carbonate (PC); however, the window of PC concentrations which resulted in structural electrolytes with bicontinuous microstructures was very narrow; at PC concentrations above 1 wt.%, gel-like polymers with no permanent mesoporosity were obtained.

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Freeze‐dried graphene oxide modified with trimethylhexamethylene in the mix solvent for improved anti‐corrosion property of epoxy

Hou

Gao

Wang

et al. 2020

J of Applied Polymer Sci

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Graphene oxide (GO) reinforcement to enhance the property of epoxy has been reported many times; with most of the papers focusing on how to modify GO with different functional groups to achieve better dispersion. Here, the importance of the preparation route on the coating systems performance was investigated. It was found that a mixed polar/nonpolar solvent BuOH/xylene (3/1 vol/vol) was the best choice for forming the epoxy/GO coatings. Furthermore, it was found that when the freeze‐dried GO sonicated with the curing agent trimethylhexamethylene diamine in the mix solvent, the as‐prepared coating exhibited best performance, including better GO dispersion and hydrophobicity, higher adhesion, and anti‐corrosion property. Without any additional chemical to modify the GO, this optimized preparation route for epoxy/GO coatings will provide a guide for future similar research works, especially for the GO dispersion in nonaqueous systems.

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Preparation of epoxy monoliths via chemically induced phase separation

Cited by 3 publications

References 33 publications

Dissimilar Materials Bonding Using Epoxy Monolith

Dissimilar Materials Bonding Using Epoxy Monolith

Composition as a Means To Control Morphology and Properties of Epoxy Based Dual-Phase Structural Electrolytes

Freeze‐dried graphene oxide modified with trimethylhexamethylene in the mix solvent for improved anti‐corrosion property of epoxy

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