Anti-aging behavior of amino-containing co-condensed nanosilica in polyethylene

Lu, Ming; Liu, Peng; Zhang, Shimin; Yuan, Wenjing; Ding, Siyin; Wang, Feng; Ding, Yanfen; Yang, Mingshu

doi:10.1016/j.polymdegradstab.2018.05.028

Cited by 16 publications

(8 citation statements)

References 78 publications

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“…The initial subject is related to hydroxy groups bonding between binder and silica nanoparticles surface, which increase according to surface energy 62 , 63 . In addition, the high surface area to volume ratio (a unique feature) of FSN causes the combinability of binder molecules with fumed silica particles to increase 64 . Silica NPs could support binder molecules through chemical bonds and physical reaction (van der Waals force) 65 .…”

Section: Mechanismmentioning

confidence: 99%

Rheological, physicochemical, and microstructural properties of asphalt binder modified by fumed silica nanoparticles

Cheraghian

Wistuba

Kiani

et al. 2021

Sci Rep

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Warm mix asphalt (WMA) is gaining increased attention in the asphalt paving industry as an eco-friendly and sustainable technology. WMA technologies are favorable in producing asphalt mixtures at temperatures 20–60 °C lower in comparison to conventional hot mix asphalt. This saves non-renewable fossil fuels, reduces energy consumption, and minimizes vapors and greenhouse gas emissions in the production, placement and conservation processes of asphalt mixtures. At the same time, this temperature reduction must not reduce the performance of asphalt pavements in-field. Low aging resistance, high moisture susceptibility, and low durability are generally seen as substantial drawbacks of WMA, which can lead to inferior pavement performance, and increased maintenance costs. This is partly due to the fact that low production temperature may increase the amount of water molecules trapped in the asphalt mixture. As a potential remedy, here we use fumed silica nanoparticles (FSN) have shown excellent potential in enhancing moisture and aging susceptibility of asphalt binders. In this study, asphalt binder modification by means of FSN was investigated, considering the effects of short-term and long-term aging on the rheological, thermal, and microstructural binder properties. This research paves the way for optimizing WMA by nanoparticles to present enhanced green asphalt technology.

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Section: Mechanismmentioning

confidence: 99%

Rheological, physicochemical, and microstructural properties of asphalt binder modified by fumed silica nanoparticles

Cheraghian

Wistuba

Kiani

et al. 2021

Sci Rep

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show abstract

“…They both have absorptions bands at 1010, 1131 and 784 cm −1 , which are assigned to the Si–O–Si stretching vibration. The peak around 1010 cm −1 indicates that there is a cage structure in the PSQ, the peak at 1131 cm −1 indicates that there is a ladder or layered structure in the PSQ, and the peak at 784 cm −1 is ascribed to Si–C bond stretching vibration [25,26,27]. At last, the peaks at 910 and 1461 cm −1 are attributed to epoxy and N–H bonds [27,28], and the absorption band at 1640 cm −1 corresponds to bending vibration of the hydroxyl group of absorbed water.…”

Section: Resultsmentioning

confidence: 99%

Flame Retardancy and Mechanism of Novel Phosphorus-Silicon Flame Retardant Based on Polysilsesquioxane

et al. 2019

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A novel phosphorus-silicon flame retardant (P5PSQ) was prepared by bonding phosphate to silicon-based polysilsesquioxane (PSQ) and used as flame retardant of poly (lactic acid) (PLA). The results show that PLA with 10 wt % P5PSQ has a limiting oxygen index (LOI) 24.1%, the peak heat release rate (PHRR) and total heat release (THR) of PLA decrease 21.8% and 25.2% compared to neat PLA in cone calorimetric test, indicating that P5PSQ shows better flame retardancy in comparison to PSQ. Furthermore, the study for the morphology and composition of carbon residue after the combustion of PLA and the gas release of PLA during combustion illustrate that P5PSQ has flame retardancy in condensed phase and gas phase simultaneously. In condensed phase, phosphorus from phosphate promotes the formation of more stable and better carbon layer containing Si and P, which inhibits the transfer of heat and oxygen in the combustion. In gas phase, the phosphate in P5PSQ emits phosphorus-containing compound that can restrain the release of C–O containing products, which may have effective flame retardancy for PLA in gas phase to a certain extent. In one word, P5PSQ is denoted as a good phosphorus-silicon synergistic flame-retardant.

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“…The peak at 782 cm À1 of Si-C bond stretching vibration peak existed in the spectra of both PSQ and PPSQ. 36,41,42 The rocking vibration absorption of primary amine at 850 cm À1 disappeared in PPSQ, which indicates that the amino group reacted with phosphite.…”

Section: Characterization Of Psq and Ppsqmentioning

confidence: 99%

“…36 The peaks at 2941 and 2872 cm À1 related to the vibration of C-H in CH 2 group were illustrated in the two curves. 41 The absorptions bands at 1030 and 1115 cm À1 are assigned to the Si-O-Si stretching vibration. The peaks around 1030 cm À1 and 1115 cm À1 indicate that the PSQ has a cage structure and a ladder or layered structure, respectively.…”

Section: Characterization Of Psq and Ppsqmentioning

confidence: 99%

Improving the stability and ductility of polylactic acid via phosphite functional polysilsesquioxane

et al. 2019

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Anti-aging behavior of amino-containing co-condensed nanosilica in polyethylene

Cited by 16 publications

References 78 publications

Rheological, physicochemical, and microstructural properties of asphalt binder modified by fumed silica nanoparticles

Rheological, physicochemical, and microstructural properties of asphalt binder modified by fumed silica nanoparticles

Flame Retardancy and Mechanism of Novel Phosphorus-Silicon Flame Retardant Based on Polysilsesquioxane

Improving the stability and ductility of polylactic acid via phosphite functional polysilsesquioxane

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