Chemical analysis of surface and bulk of asphalt binders aged with accelerated weathering tester and standard aging methods

Menapace, Ilaria; Yiming, Wubulikasimu; Masad, Eyad

doi:10.1016/j.fuel.2017.04.042

Cited by 96 publications

(50 citation statements)

References 24 publications

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“…The Fe 2p state reveals that there were two peaks at 712.42 eV for Fe 2p 1/2 and 725.93 eV for Fe 2p 3/2 due to the presence of Fe 2+ , which was well matched with the reported values [50] in Figure 2c. Figure 2d illustrate the binding energy peak at 284.92 eV, which could describe the presence of C 1s, which was in good agreement with the literature [51]. At the same time, Raman analysis provided some preliminary idea of the presence of carbon on LFS [52].…”

Section: Resultssupporting

confidence: 85%

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Carbon Loaded Nano-Designed Spherically High Symmetric Lithium Iron Orthosilicate Cathode Materials for Lithium Secondary Batteries

et al. 2019

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In the present study, Li2FeSiO4 (LFS) cathode material has been prepared via a modified polyol method. The stabilizing nature of polyol solvent was greatly influenced to reduce the particle size (~50 nm) and for coating the carbon on the surface of the as-mentioned materials (~10 nm). As-prepared nano-sized Li2FeSiO4 material deliver initial discharge capacity of 186 mAh·g−1 at 1C with the coulombic efficiency of 99% and sustain up to 100 cycles with only 7 mAh·g−1 is the difference of discharge capacity from its 1st cycle to 100th cycle. The rate performance illustrates the discharge capacity 280 mAh·g−1 for lower C-rate (C/20) and 95 mAh·g−1 for higher C-rate (2C).

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Section: Resultssupporting

confidence: 85%

“…It was expected due to the solid electrolyte interface (SEI) formation on the surface of the materials. However, carbon peaks revealed the presence of C=O, C–C and C–Fe respectively at 289, 285 and 283 eV [51].…”

Section: Resultsmentioning

confidence: 99%

Carbon Loaded Nano-Designed Spherically High Symmetric Lithium Iron Orthosilicate Cathode Materials for Lithium Secondary Batteries

et al. 2019

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“…The O 1s in figure 2b for the P2VP is dominated by C-O and SiO2 bonds, occurring at 533.2 eV and 532.6 eV, respectively [18][19][20][21] . The minor peak at 531.8 eV resembles carbon oxygen bonds arising from atmosphere exposure as were seen in figure 3a.…”

Section: P2vp Filmmentioning

confidence: 99%

Hard x-ray photoelectron spectroscopy study of copper formation by metal salt inclusion in a polymer film

Snelgrove¹,

Mani-González²,

Bogan³

et al. 2019

J. Phys. D: Appl. Phys.

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In this work we present the results of a Hard X-ray Photoelectron Spectroscopy (HAXPES) study on the creation of metallic copper layers via metal-salt infiltration into a poly-2-vinylpyridine (P2VP) film. Metal salt inclusion is a wet chemistry process which allows for the fabrication of both metal and metal oxide films by means of infiltrating a receptive polymer thin film with metal salt precursors. A copper infiltrated P2VP film was subject to UV/Ozone treatment to form copper oxide and annealed in-vacuo to reduce the film to metallic copper. HAXPES and transmission electron microscope (TEM) measurements were used to study the polymer film before and after metal salt infiltration, along with analysis of the copper oxide created after UV/Ozone treatment. The results show successful infiltration of the metal salt into the polymer film, as well as complete conversion to copper oxide following UV/Ozone treatment and reduction to metallic copper with a subsequent in-situ anneal, which demonstrates the ability of the technique for the creation of several key integrated circuit features.

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“…The (rolling) thin film oven test ((R)TFOT) test and the pressure aging vessel (PAV) test are commonly used in the world to simulate the short-term thermo-oxidative aging and long-term aging behavior of bitumen [13,19]. However, due to ignoring the effect of ultraviolet radiation, the correlation between PAV simulation aging and actual pavement aging is not significant.…”

Section: Introductionmentioning

confidence: 99%

Aging Mechanism and Properties of SBS Modified Bitumen under Complex Environmental Conditions

et al. 2019

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Bitumen aging can lead to the deterioration of asphalt pavement performance, shortening the service life of road. In order to solve the problem that current studies on the ultraviolet (UV) aging of bitumen either ignore the effects of natural environmental conditions or only consider the effects of water. In this study, different aqueous media and UV coupled simulated aging tests were carried out on virgin bitumen and styrene butadiene styrene (SBS) modified bitumen in a UV environment chamber. The combination of macroscopic performance tests and microstructure tests was used to analyze the physical, rheological, and microstructure changes of virgin bitumen and SBS modified bitumen after The film oven test (TFOT) aging and UV aging in different environments (UV, UV + Water, UV + Acid, UV + Salt). Dynamic shear rheometer (DSR) results indicated that UV aging results in the increase of rutting factor and the improvement of rutting resistance at high temperature. The Fourier transform infrared spectrum (FTIR) results illustrated that the bitumen would be oxidized and SBS would be degraded under ultraviolet radiation. The four-component analysis test results showed that light component migrated to the heavy component during the aging process. Moreover, water will aggravate the UV aging of bitumen, and the presence of acid or salt worsens ultraviolet aging.

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Chemical analysis of surface and bulk of asphalt binders aged with accelerated weathering tester and standard aging methods

Cited by 96 publications

References 24 publications

Carbon Loaded Nano-Designed Spherically High Symmetric Lithium Iron Orthosilicate Cathode Materials for Lithium Secondary Batteries

Carbon Loaded Nano-Designed Spherically High Symmetric Lithium Iron Orthosilicate Cathode Materials for Lithium Secondary Batteries

Hard x-ray photoelectron spectroscopy study of copper formation by metal salt inclusion in a polymer film

Aging Mechanism and Properties of SBS Modified Bitumen under Complex Environmental Conditions

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