Fabrication and performance evaluation of aminopropyl triethoxysilane-dopamine-MoS2 incorporated SBS modified asphalt

Wei, Yunhao; Hu, Chengwei; Muhammad, Yaseen; Chen, Lishan; Zhou, Di; Wang, Shanshan; Li, Jing; Chen, Qihang

doi:10.1016/j.conbuildmat.2020.120346

Cited by 38 publications

(16 citation statements)

References 61 publications

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“…It can be observed that the edge structure of MoS 2 @PDA becomes softened compared to the unmodified MoS 2 . In addition, the inset images revealed that both MoS 2 @PDA and MoS 2 consist of the hexagonal lattices and the lattice spacing of 0.27 nm, which was corresponding to the (100) lattice plane MoS 2 [ 27 ]. The energy dispersive spectroscopy (EDS) spectrum shown in Figure 2 c,f indicated that a new peak N can be detected on MoS 2 @PDA.…”

Section: Resultsmentioning

confidence: 99%

“…The XRD pattern of MoS 2 @ PDA still had characteristic diffraction peaks at (002), (004), (103), (104), (105), and (110), which showed that before and after PDA wrapped, the crystal structure of MoS 2 had not changed [ 35 ]. However, the existence of PDA affected the crystallinity of the MoS 2 crystal [ 27 ]. The introduction of carbon would lead to the reduction of the diffraction peak [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

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Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS2)-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance

Tian

2021

Membranes

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Tight ultrafiltration (TUF) membranes with high performance have attracted more and more attention in the separation of organic molecules. To improve membrane performance, some methods such as interface polymerization have been applied. However, these approaches have complex operation procedures. In this study, a polydopamine (PDA) modified MoS2 (MoS2@PDA) blending polyethersulfone (PES) membrane with smaller pore size and excellent selectivity was fabricated by a simple phase inversion method. The molecular weight cut-off (MWCO) of as-prepared MoS2@PDA mixed matrix membranes (MMMs) changes, and the effective separation of dye molecules in MoS2@PDA MMMs with different concentrations were obtained. The addition amount of MoS2@PDA increased from 0 to 4.5 wt %, resulting in a series of membranes with the MWCO values of 7402.29, 7007.89, 5803.58, 5589.50, 6632.77, and 6664.55 Da. The MWCO of the membrane M3 (3.0 wt %) was the lowest, the pore size was defined as 2.62 nm, and the pure water flux was 42.0 L m−2 h−1 bar−1. The rejection of Chromotrope 2B (C2B), Reactive Blue 4 (RB4), and Janus Green B (JGB) in aqueous solution with different concentrations of dyes was better than that of unmodified membrane. The separation effect of M3 and M0 on JGB at different pH values was also investigated. The rejection rate of M3 to JGB was higher than M0 at different pH ranges from 3 to 11. The rejection of M3 was 98.17–99.88%. When pH was 11, the rejection of membranes decreased with the extension of separation time. Specifically, at 180 min, the rejection of M0 and M3 dropped to 77.59% and 88.61%, respectively. In addition, the membrane had a very low retention of salt ions, Nacl 1.58%, Na2SO4 10.52%, MgSO4 4.64%, and MgCl2 1.55%, reflecting the potential for separating salts and dyes of MoS2@PDA/PES MMMs.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS2)-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance

Tian

2021

Membranes

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“…The results of the softening point, penetration and ductility tests of asphalt samples obtained using ASTM D36, ASTM d5, and ASTM D113 standards respectively, [35] are shown in the Figure 9. It is seen that SBS modified asphalt has the highest penetration and lowest softening content, the changes of the three indexes show an opposite trend.…”

Section: Three Indicatorsmentioning

confidence: 99%

Electrospinning strategy for the preparation of nano‐porous fibers as modifier for inducing the network structure and enhancing mechanical properties of SBS‐modified asphalt

et al. 2022

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Electrospinning is used to control the interface structure of macro‐polyacrylonitrile (PAN) fibers, and nano‐porous fibers (E‐PAN) which possess enhanced adhesion and interface effects. Herein, E‐PAN was prepared via electrospinning and was in turn incorporated into styrene‐butadiene‐styrene (SBS) asphalt to prepare PAN modified asphalt. The effect of E‐PAN addition on the performance of modified asphalt was explored. Fourier transform infrared (FT‐IR) spectroscopy, X‐ray diffraction, scanning electron microscopy, atomic force microscopy (AFM), and AFM tests confirmed that E‐PAN exhibited a highly rough nano‐porous skeleton without any prominent structural damage during the preparation process. The three major indexes, dynamic shearing rheometer, MSCR, rotational viscosity, and thermogravimetric analysis tests results showed that E‐PAN modified asphalt exhibited excellent viscoelasticity, anti‐rutting and anti‐fatigue properties and thermal stability (THRI of 192.7°C). FT‐IR test of the four components of modified asphalt confirmed that E‐PAN chemically crosslinked with the saturates and aromatics in the base asphalt and SBS, which resulted in a uniform and well‐developed network structure. In addition, Brauner‐Emmett‐Teller and fluorescence microscopy results confirmed that E‐PAN got fully swollen in a behavior similar to that of SBS in the base asphalt, and hence helped SBS to form an excellent network structure in asphalt. E‐PAN played the important role of stress buffer, mutual entanglement, and good thermal insulation inside the asphalt.

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“…The FTIR spectra of the four types of fiber-incorporated modified asphalts are shown in Figure 6, which indicate that the characteristic absorption peak at 596 cm À1 of nacre fiber/asphalt and AF-PDA-MoS 2 /asphalt are attributed to the Mo S vibrational mode (FTIR test results in Figure 3), [22,29,35] showing the successful preparation of the fiber-incorporated modified asphalt. In addition, no absorption peaks appeared or disappeared for the four types of fiber-incorporated modified asphalts, indicating that no chemical reaction occurred during the fiber-incorporated modified asphalt preparation.…”

Section: Ftir Analysismentioning

confidence: 99%

“…In this connection, many studies have been reported. For instance, Wei et al [22] reported that addition of MoS 2 to asphalt through surface modification improves their mutual compatibility and hydrophobicity. Therefore, MoS 2 with excellent properties can be used as a potential "brick" material.…”

Section: Introductionmentioning

confidence: 99%

Study on the modified fiber with nacre layer structure based on bionic coating and molybdenum disulfide co‐construction incorporated asphalt

et al. 2021

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A green and efficient two-step method was used to modify the surface of aramid fiber with a double shell structure by compounding MoS 2 with dopamine and tannic acid to develop nacre fiber with enhanced interfacial effect, which was in turn applied to prepare nacre fiber incorporated modified asphalt. The nacre fiber and its incorporated modified asphalt were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), fluorescence microscopy (FM), and dynamic shear rheometer (DSR). FTIR results indicated that the nacre fiber was highly dispersed in the matrix asphalt while it was highly thermally stable (T HRI of 207.4 C) as confirmed by thermogravimetric analysis. FM and SEM analyses confirmed that the nacre fiber formed a uniformly dispersed and well-developed three-dimensional network structure in the matrix asphalt, which endorsed the nacre fiber modified asphalt with enhanced mechanical and viscoelastic properties as confirmed by DSR tests.

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Fabrication and performance evaluation of aminopropyl triethoxysilane-dopamine-MoS2 incorporated SBS modified asphalt

Cited by 38 publications

References 61 publications

Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS2)-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance

Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS2)-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance

Electrospinning strategy for the preparation of nano‐porous fibers as modifier for inducing the network structure and enhancing mechanical properties of SBS‐modified asphalt

Study on the modified fiber with nacre layer structure based on bionic coating and molybdenum disulfide co‐construction incorporated asphalt

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