Metal-organic framework nanoparticles as a free radical scavenger improving the stability of epoxy under high dose gamma irradiation

Wang, Shuai; Song, Leilei; Liu, Shengkai; Pei, Xiaoyuan; Zhao, Yufen; Min, Chunying; Shao, Ruiqi; Ma, Tianshuai; Yin, Yin; Xu, Zhiwei; Wang, Chunhong

doi:10.1016/j.polymdegradstab.2022.110231

Cited by 12 publications

(3 citation statements)

References 30 publications

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“…Figure b shows the partial enlarged detail, we can find that the onset decomposition temperature of the initial HMA is 423.5 °C, and that of the HMA treated with a 60 °C hydrothermal treatment is 420.3 °C. This phenomenon indicates that the thermal stability of HMA decreases after a 60 °C hydrothermal treatment. , On the other hand, in the process of hydrothermal impregnation, the HMA absorbs water and expands, creating a shear stress at the bonding interface, and water accumulates at the interface of the steel fiber/HMA composite, generating osmotic pressure; the existence of these stresses will inevitably lead to the bonding interface and the HMA itself being part of the molecular chain and molecular bond fracture, so that the material produces cracks within the cracks, and as time passes, the cracks continue to grow and finally make the interface damage; if the water in the environment at this time enters the cracks, the two will interact and promote each other, which will inevitably accelerate the destruction of the interface greatly. Higher temperatures accelerate the entry of water molecules into the interface, promoting hydrolysis and aging of the bonded interface components, leading to reduced interfacial bond strength.…”

Section: Resultsmentioning

confidence: 99%

Interface Bonding Properties and Mechanism of Steel Fiber and Hot Melt Adhesive via Interface Design Engineering

Zhang,

Liu,

Zhang

et al. 2024

Langmuir

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Steel fiber textile, which is composed of steel fibers and glass fibers, has a support layer impregnated with hot melt adhesive (HMA). During long-term service, the bonding force between the steel fiber/HMA system interfaces is poor. In order to improve the bond strength and durability of the interface, this paper introduced sandblasting, acid-etching, and phosphating treatments on the surface of the steel fibers. Also, the effects of these three pretreatment methods on the bond strength of the steel fiber/HMA interface were investigated. The results indicate that the interfacial bond strength of composites made from steel fibers is improved via surface treatment. Under a hydrothermal and simulated concrete pore solution environment, the durability of the steel fiber/HMA interface after sandblasting and acid-etching pretreatment is not as good as that after phosphating pretreatment. The mechanical properties of the phosphating/HMA composite were maintained at 4.56 and 2.24 times compared to those of the untreated/HMA composite, respectively. This is because the pinning effect formed by the phosphating film on the surface of steel fibers at the interface of steel fiber/HMA can serve as a physical barrier against corrosion, preventing the invasion of chloride ions and water vapor and improving the durability of the interface.

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Section: Resultsmentioning

confidence: 99%

Interface Bonding Properties and Mechanism of Steel Fiber and Hot Melt Adhesive via Interface Design Engineering

Zhang,

Liu,

Zhang

et al. 2024

Langmuir

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“…There are two main ways to improve the radiation resistance of polymers: one is to add radiation-resistant additives. For example, metals and their oxides, compounds containing aromatic structures, , and free radical quenchers − can be used as radiation-resistant additives to improve the radiation stability of composites. The other is to change the molecular structure and synthesize polymers containing radiation-resistant groups .…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphite on Radiation Resistance and Oxygen Shielding Properties of EPDM Composites: Insights from Experiment and Molecular Simulation

Wang,

Huang,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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In this work, the effects of inorganic filler graphite (GE) modified ethylene propylene diene monomer (EPDM) on the radiation resistance of EPDM composites were systematically studied by combining experiment and simulation. The mechanical properties of EPDM with different contents of GE under different radiation doses were analyzed by a tensile strength test. The changes in rubber network structures during the radiation process of EPDM sealing materials were speculated to be due to the compression permanent deformation. The scanning electron microscope (SEM) images clearly showed that GE played a protective role in the EPDM matrix under the synergistic effect of γ-rays and high temperature. In addition, the fraction free volume (FFV) of the material, mean square displacement (MSD) and diffusion coefficient (D) of oxygen in the system were quantitatively studied by molecular dynamics (MD) simulation. The MD simulation results indicated that the addition of GE could reduce the activity space of oxygen in the material and weaken the migration and diffusion of oxygen. This work is expected to provide guidance for the design and preparation of radiation-resistant materials.

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“…Decoration of GO sheets with inorganic nanostructures can be done with or without chemical modification. , The decorated inorganic nanoparticle improves the exfoliation of GO sheets, thereby improving the overall dispersion and preventing the sheets from restacking. Nanosilica, nano TiO 2 , metal–organic framework, and graphitic carbon nitride (gC 3 N 4 ) have been extensively employed as modifiers for GO sheets and reinforce virgin epoxy without sacrificing their basic properties. Among these, silica nanoparticles (SiO 2 ) are considered an environmentally friendly decorative for GO sheets due to their high thermal stability, chemical stability, low surface free energy, and reinforcing action …”

Section: Introductionmentioning

confidence: 99%

Insights into the Synergistic Effect of Graphene Oxide/Silica Hybrid Nanofiller for Advancing the Properties of Epoxy Resin

George,

Vijayan P,

Ponçot

et al. 2024

ACS Appl. Polym. Mater.

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Tuning the interfacial interaction between the filler and the matrix is essential to fabricate high-performance polymer nanocomposites. Herein, a hybrid nanofiller based on graphene oxide (GO) and nanosilica (SiO2) was prepared via electrostatic charge attraction. Amine-functionalized nanosilica was decorated over the surface of the GO sheet via simple aqueous mixing. The hybrid nanofiller approach of GO with nanosilica reduces the cohesive force between the GO sheets, facilitating better dispersion and thereby enhancing the properties of epoxies (preventing GO–GO and silica–silica agglomeration). The high-resolution transmission electron microscopy showed that the d spacing between GO sheets in the GO-SiO2 hybrid nanofiller (0.32 ± 0.70 nm) was higher than that in pristine GO. The synergistic effect of GO and nanosilica in the GO-SiO2 hybrid nanofiller of varying content (0.25 to 0.75 phr) as a reinforcement for advancing the properties of epoxies was monitored systematically. The effect of the GO-SiO2 hybrid nanofiller on the chain confinement, structure, and mechanics was studied by dynamic mechanical analysis. It was found that the hybrid nanofiller incorporation improved the filler matrix interaction and, thereby, the mechanical properties and glass transition temperature (T g) of epoxy. Epoxy chains near the vicinity of the hybrid filler have become immobilized because of the strong filler-matrix interaction and form a confined zone around the filler-matrix interface. The quantitative measurement of the immobilized epoxy chains formed by the hybrid nanofiller was determined from the tan delta curve. A maximum enhancement in the storage modulus, T g, impact strength, and other theoretical parameters was observed for epoxy nanocomposite with 0.5 phr loading of the hybrid nanofiller.

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Metal-organic framework nanoparticles as a free radical scavenger improving the stability of epoxy under high dose gamma irradiation

Cited by 12 publications

References 30 publications

Interface Bonding Properties and Mechanism of Steel Fiber and Hot Melt Adhesive via Interface Design Engineering

Interface Bonding Properties and Mechanism of Steel Fiber and Hot Melt Adhesive via Interface Design Engineering

Effect of Graphite on Radiation Resistance and Oxygen Shielding Properties of EPDM Composites: Insights from Experiment and Molecular Simulation

Insights into the Synergistic Effect of Graphene Oxide/Silica Hybrid Nanofiller for Advancing the Properties of Epoxy Resin

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