ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2023
·Vol. 30
·期 23
·64547-64564
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IF 5.8
Yang Ling,Han Fuhu,Muhammad Yaseen,Liu Yu,Zhao Zhenxia,Kong Hao,Li Jing,Zhang Honggang
Hydrophobic modification of bagasse fibers (BFs) through a green approach can promote its reuse in asphalt and enhance the utilization value of agricultural and forestry waste in road engineering. In contrast to traditional chemical modification, this study reports a new method for the hydrophobic modification of BFs using tannic acid (TA) and the in situ growth of FeOOH nanoparticles (NPs), resulting in FeOOH-TA-BF, which is used to prepare styrene–butadiene styrene (SBS)–modified asphalt. The experimental results show that the surface roughness, specific surface area, thermal stability, and hydrophobicity of the modified BF are improved, which is beneficial for enhancing the interface compatibility with asphalt. Specifically, compared with BF/SBS-modified asphalt, FeOOH-TA-BF/SBS-modified asphalt exhibits 39.21% and 23.26% increase in the elastic modulus G′ and viscous modulus G″, respectively, at the optimal dosage of 2.5%, corresponding to 6.15-fold and 7.13-fold increase in the fatigue life at 2.5% and 5.0% strain respectively, and 22.0% improvement in shear resistance performance. In the meantime, 2.5-fold enhancement of the storage stability. Therefore, this study provides a simple, environmentally friendly, and efficient hydrophobic modification method that is of great significance for promoting the resource utilization of solid waste BF. Graphical Abstract
研究领域:
土木工程
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环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
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2016
·Vol. 7
·期 24
·4072-4080
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IF 5.687
Haibin Sun,Chunyu Jiang,Nanying Ning,Liqun Zhang,Ming Tian,Shengli Yuan
Herein, we report an approach to the preparation of a homogeneous styrene–butadiene–styrene triblock copolymer (SBS) dielectric elastomer (DE) with dramatically improved actuated strain by using a photochemical thiol–ene click reaction. The stock SBS was grafted with dipoles (ester groups) to increase the polarizability of SBS. The grafting degree of dipoles on SBS can be controlled by irradiation time to control its electromechanical properties. The grafting degree of modified SBS increases with the increase of irradiation time, and a maximum grafting degree of 81% can be achieved at a radiation time of 40 min. After modification, the phase mixing of PB and PS blocks occurs and the size of PS domains largely decreases, leading to the obvious decrease in the tensile strength and elastic modulus (Y). However, the modified SBS still shows good tensile strength (>3 MPa). More importantly, the dielectric constant (k) largely increases for the modified SBS. The simultaneous increase in k and decrease in Y result in a large increase in electromechanical sensitivity, and thus a large increase in maximum actuated strain and the actuated strain at low electric fields (e.g. 15 kV mm−1). In addition, the modified SBS shows consistently low dielectric loss. Our study provides a simple, effective and controllable chemical method to prepare a homogeneous DE with a high k, large actuated strain at a low electric field, good mechanical strength, easy processibility, and recyclability.
研究领域:
材料科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
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IF 3.7
Tianwei Zhang,Shanjun Gao,Yanheng He,Quantao Liu,Shi Xu,Ronghua Zhuang,Shangheng Zeng,Jianying Yu
The introduction of dynamic chemical bonds (disulfide bonds, hydrogen bonds, etc.) into the network structure of SBS modified asphalt (SMA) can notably improve its healing properties. However, aging may break the dynamic chemical bonds in self-healing SMA, thereby deteriorating its healing ability. Therefore, it is crucial to investigate the effects of aging on the structure and properties of self-healing SMA with dynamic chemical bonds. Herein, self-healing SBS modified asphalts (SD/SMA and DDH/SMA) containing single disulfide bonds (SD) and dual disulfide bonds and hydrogen bonds (DDH) were prepared by free radical reaction, respectively. The SD/SMA and DDH/SMA were subjected to Thin Film Oven Test (TFOT) aging and Pressurized Aging Vessel (PAV) aging. Chemical structure analysis showed that the disulfide bonds underwent partial break after PAV aging. Nevertheless, the results of the healing tests indicated that compared to SMA, SD/SMA and DDH/SMA maintained superior healing properties after aging under the break-reorganization effect of dynamic chemical bonds. The fatigue healing indices of SD/SMA and DDH/SMA were 51.9 % and 95.8 % higher than those of SMA after PAV aging. The rheology tests revealed that SD/SMA and DDH/SMA had higher recovery rates and low-temperature cracking resistance than SMA before and after aging. Compared with SMA, SD/SMA and DDH/SMA had superior anti-aging performance. After PAV aging, the ductility retention rate of SD/SMA and DDH/SMA was 72.9 % and 98.9 % higher than that of SMA. Furthermore, compared to SD/SMA, DDH/SMA containing dual disulfide and hydrogen bonds had better healing capability, rheological properties and anti-aging performance.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2025
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IF 8
Xiaobin Han,Xirong Niu,Zhuang Zhang,Song Xu,Xinxing Zhou,Zhilong Cao,Zhengang Feng,Jianying Yu
This study aimed to improve the rejuvenation quality of aged styrene-butadiene-styrene (SBS) modified bitumen mixture (PmBM) by employing composite rejuvenation through the synergistic application of various active-flexible rejuvenators (AFRs) featuring distinct molecular structures with aromatic oil (AO). By comparing with the mixture rejuvenated solely by AO, the impact of different AFRs on the pavement performance of aged PmBM as well as its aging resistance after rejuvenation was explored. The results demonstrated that, in comparison to the mixture rejuvenated solely by AO, the incorporation of AFRs considerably enhanced the high-temperature deformation resistance, low-temperature crack resistance, fatigue durability, and water damage resistance of the rejuvenated PmBM. And these properties were restored to levels close to or even surpassing those of fresh mixtures. Compared with sole AO application, AFRs demonstrated superior performance by effectively restoring the cross-linking structures of degraded SBS within the bitumen, while concurrently enhancing interfacial adhesion between the rejuvenated bitumen binders and the granite aggregates. These synergistic effects considerably improved the structural integrity of rejuvenated PmBMs. Moreover, the results of the thermal aging showed that the deterioration degree in pavement performance after aging was considerably lower for the (AFRs+AO) rejuvenated PmBMs compared to those rejuvenated solely with AO. The possible reason is that AFRs enhances the thermal aging resistance of the rejuvenated PmB by reconstructing the cross-linking structure of degraded SBS within the bitumen. The study reveals that during the rejuvenation process of aged PmBMs, it is particularly crucial to prioritize and effectively restore the cross-linking structures of degraded SBS within them. Additionally, when optimizing the molecular structure of AFRs in subsequent study, it is imperative to consider the sensitivity of the molecular structure of AFRs to aging factors, so as to ensure the durability of the rejuvenated PmBMs.
研究领域:
土木工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2021
·Vol. 8
·期 3
·035501
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IF 1.62
Chao Li,Guodong Zeng,Min Zhou,Yang Fang,Zongwu Chen,Yishen Xu,Siyin Ding,Miao Yuan,Hao Li,Shaopeng Wu
Combination of styrene-butadiene-styrene (SBS) polymer and layered double hydroxides (LDHs) has commonly applied in asphalt to improve anti-ultraviolet aging performance, but it can not afford the reparation of cracks caused by aging of asphalt. Also, few researches focused on the structure and performance changes during synthesis of LDHs. Based on self-healing performance of asphalt, the produced cracks can be repaired by microwave heating. Therefore, the controllable synthesis of traditional microwave absorber SiC to wrap LDHs (SwL) at different temperatures was studied in this paper, and the effects of different SBS/SwL combination on the microwave absorption and exothermic properties of modified asphalt were studied. The SwL was firstly synthesized at 200 °C, 350 °C, 500 °C and 650 °C. Then morphology, phase composition, chemical structure of different SwL were evaluated. Finally, based on different combination of SBS and SwL, the effects of SBS/SwL on the microwave absorption in the frequency band from 1 GHz to 18 GHz and exothermic characteristics at 2.45 GHz of the modified asphalt were analyzed. The results show that SwL can be synthesized successfully, and the processing temperature significantly affects the structure of SwL. The SBS/SwL-200 modified asphalt has the best microwave absorption and exothermic properties. When used in self-healing asphalt, it is more advantageous to choose 200 °C as the synthesis temperature of SwL.
研究领域:
材料科学
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土木工程
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化学工程
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2025
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IF 8
Xiaobin Han,Xirong Niu,Zhuang Zhang,Zhilong Cao,Ruiyang Wang,Zhengang Feng,Jianying Yu
Active flexible rejuvenators achieved high-quality regeneration of aged SBS modified bitumen (SMB) by reconstructing the aged SBS cross-linked structure while also an incorporating bitumen component reducing agent (aromatic oil, AO). However, the impact of active flexible rejuvenators with different molecular structures on the ultraviolet (UV) radiation durability of regenerated SBS-modified bitumen remains unclear, making it impossible to evaluate the long-term effectiveness of these rejuvenators. In this study, aged SMB was subjected to composite regeneration using active flexible rejuvenators with different molecular structures and AO. Subsequently, the regenerated SMB was subjected to UV aging. By comparing it with SMB regenerated with only AO, the influence of active flexible rejuvenators with different molecular structures on the UV aging properties of the regenerated SMB was investigated. FTIR results revealed that the SBS cross-linked structure, which had been reconstructed by the active flexible rejuvenators, underwent continued degradation and breakage during UV aging. This process consumed UV radiation energy and oxygen, thereby partly inhibiting the oxidative condensation of the regenerated bitumen. The SARA fractions analysis indicated that active flexible rejuvenators could slow down the volatilization of light components and their rate of oxidative condensation during UV aging by reconstructing the aged SBS cross-linked structure. The incorporation of active flexible rejuvenators mitigated the deterioration of the physical and rheological properties of the regenerated SMB subjected to UV radiation. When utilized in comparison to solely employing bitumen component reducing agents, active flexible rejuvenators were capable of bolstering the aging resistance of SMB that had underwent regeneration by reconstructing the cross-linked structures of aged SBS. The effectiveness of active flexible rejuvenators in enhancing the aging resistance of SMB during regeneration varies, owing to their differing sensitivities to ultraviolet radiation based on their molecular structures. This study offered data support for optimizing the molecular structure of active flexible rejuvenators.
研究领域:
材料科学
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土木工程
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2021
·
IF 6.141
Junxian Huang,Yu Liu,Sidra Subhan,Xingrong Quan,Hua Zhong,Jing Li,Zhenxia Zhao
Herein, fast and uniform deposition of tannic acid iron ion self-assembled metal–organic network (Fe 3+ -TA) was established using salt induction strategy over graphene oxide (GO) based styrene butadiene styrene (SBS) support (Fe 3+ -TA-GO/SBS) to prepare modified asphalt. Mechanical properties of the SBS modified asphalt (SBS-MA), GO/SBS-MA, and Fe3 + -TA-GO/SBS-MA were systematically studied via dynamic shear rheometer, multiple stress creep recovery test, and thermogravimetric analysis. The mechanism of Fe 3+ -TA-GO in SBS-MA was elucidated by Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy. Results showed that the penetration of 0.10 % Fe 3+ -TA-GO/SBS-MA is 38.3 % lower than that of SBS-MA, which indicates excellent viscoelastic properties, rutting resistance, and thermal stability 0.10 % Fe 3+ -TA-GO/SBS-MA modified asphalt. This green biomimetic modification method effectively solves the agglomeration problem of GO in asphalt and promotes the formation of a well-developed SBS network structure in Fe 3+ -TA-GO/SBS-MA, which could be considered as a promising approach for the preparation of modified asphalt with enhanced properties for practical applications.
研究领域:
材料科学
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土木工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Arabian Journal of Chemistry
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2024
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IF 5.3
Alaaddin M.M. Saeed,Gui-Ping Cao,Ahmed S. Al-Fatesh,Salwa B. Alreshaidan,Nawab Ali,Mustapha Sani Shehu,Jun-Yang Yan
This study presents the practical synthesis of platinum nanoparticle decorated multi-walled carbon nanotubes (Pt/MWCNTs) catalysts and their novel use in hydrogenating styrene–butadiene–styrene (SBS) triblock copolymers. The Pt/MWCNTs catalyst exhibited remarkable activity and selectivity in fully hydrogenating the polystyrene and polybutadiene segments within a styrene–butadiene–styrene (SBS) triblock copolymer. The characterizations proved that the Pt/MWCNTs catalyst possesses well-dispersed Pt nanoparticles with a large specific surface area (159.5501 m 2 /g). Additionally, the catalyst is with a mesoporous structure. As a result, the catalytic hydrogenation of SBS using a Pt/MWCNTs catalyst achieves a high degree of hydrogenation, with 100 % selectivity towards the polystyrene and polybutadiene blocks in the SBS triblock copolymer at 180 °C after 9 h. The Pt/MWCNTs catalyst was characterized via SEM, TEM, HRTEM, XRD, XPS, Raman, TG, and BET. Simultaneously, the SBS and cyclic block copolymer (CBC) were characterized via GPC, FTIR, 1 H NMR, 13 C NMR, and TG. In this work, Pt/MWCNTs catalyst with high activity and selectivity is developed for unsaturated polymer hydrogenation.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2024
·
IF 7.4
Tianwei Zhang,Shanjun Gao,Yanheng He,Ronghua Zhuang,Xiaobin Han,Zhenyu Zou,Jianying Yu
To reduce fossil energy consumption and environmental pollution, in this study, SBS modified bitumen (SMB) with self-healing performance was developed through directly adding aliphatic disulfide (ALD) containing double C C bonds in the melt blending process for enhancing its service life, and sulfur/SBS modified bitumen was also prepared for the comparison of ALD/SMB performance. Fourier transform infrared spectrum analyses indicated that the disulfide bonds of ALD have been successfully introduced between SBS molecular chains . Fluorescence microscopy imageries revealed that the addition of ALD improved the network structure of SMB, and the SMB had a more complete network structure when the dosage of ALD was 0.6%. Compared to SMB, the softening point and ductility of SMB with 0.6% ALD were increased by 4.5 °C and 5.2 cm, respectively. The results of dynamic shear rheometer and bending beam rheometer indicated that ALD improved high- and low-temperature rheological properties of SMB. The fatigue healing test revealed that ALD improved the self-healing performance of SBS modified bitumen. When the dosage of ALD was 0.6%, the healing index of ALD/SMB reached 0.86, while the healing index of SMB and sulfur/SMB were only 0.51 and 0.48. The fracture healing test showed that SBS modified bitumen with 0.6% ALD had a self-healing rate of 66.3%, whereas that of SMB and sulfur/SMB were only 35.8% and 38.2% after 20 h of healing at 50 °C, indicating that ALD significantly enhanced the self-healing performance of SBS modified bitumen.
研究领域:
材料科学
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土木工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
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2021
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IF 9.297
Xiaobin Han,Jianying Yu,Xiaoqiao Huang,Zhilong Cao,Ruiyang Wang,Peng He
In order to better restore the properties of aged SBS modified bitumen (ASMB) and promote its sustainable recycling, in this paper, the reactive chain extension rejuvenators (RCERs) were prepared from polyethylene glycol (PEG-400/PEG-1000) and diisocyanate (2,4-toluylene diisocyanate (TDI)/hexamethylene diisocyanate (HDI)) and the effect of RCERs on the rejuvenation of aged SBS was studied. Different rejuvenation systems composed by TDI, HDI, RCERs and aromatic hydrocarbon oil (AHO) were constructed, and the influence of rejuvenation systems ((TDI + AHO), (HDI + AHO) and (RCERs + AHO)) on the physical properties of ASMB were investigated. Fourier transform infrared spectra demonstrated that the RCERs were successfully synthesized. Gel permeation chromatography indicated that the number average molecular weight range of RCERs was 550–1150 and the molecular weight of SBS rejuvenated by RCERs was larger than that of SBS rejuvenated by TDI and HDI. Thermogravimetry-differential thermal analysis manifested that the thermal stability of SBS rejuvenated by RCERs were enhanced evidently compared with that of TDI and HDI. The physical properties of ASMB could be fully recovered by the rejuvenation systems, and the ‘RCERs +AHO’ had better rejuvenation effect on ASMB than that of ‘TDI + AHO’ and ‘HDI + AHO’.
研究领域:
材料科学
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化学工程
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土木工程
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2022
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IF 7.693
Denghui Ren,Yaseen Muhammad,Youchao Chen,Yu Liu,Canyun Mao,Susu Xing,Ruinan Pei,Zhenxia Zhao,Jing Li
In this study, a surface modified polyacrylonitrile fiber (KF-PAN) with a fish-scale whisker-like biomimetic hierarchical structure was successfully prepared via in situ competition effect of Fenton reaction. The modified fibers were used as secondary modifiers to prepare fiber-reinforced styrene–butadienestyrene (SBS) block copolymers and rubber powder (RP) modified asphalt binders (KF-PAN/SBS/RP). Energy dispersive spectroscopy, scanning electron microscopy, and atomic force microscopy analyses revealed the successful construction of bionic hierarchy on the fiber surface, and confirmed rough surface of the KF-PAN fibers. The hierarchical structure of the fiber surface acted as a buffer in the asphalt and strengthened the mutual interaction of the fiber and asphalt. Dynamic rheometer shear and strip-tensile tests showed that the KF-PAN/SBS/RP modified asphalt exhibited better viscoelasticity, rutting resistance, and tensile properties than the PAN/SBS/RP modified asphalt. The linear amplitude sweep test showed that KF-PAN/SBS/RP modified asphalt had better fatigue resistance. Thermogravimetric analysis tests indicated that the surface bionic structure of KF-PAN fibers boosted thermal stability of the fibers, which in turn enhanced the thermal stability of KF-PAN/SBS/RP modified asphalt. Fluorescence microscopy analysis showed that incorporating KF-PAN fibers improved the SBS and RP microstructure inside the asphalt, forming a good mesh structure, and alleviating the stress concentration phenomenon in SBS/RP asphalt under external traffic load.
研究领域:
材料科学
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土木工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Arabian Journal of Chemistry
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2021
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IF 5.165
Youyuan Wang,Zhanxi Zhang,Rongliang Zheng,Yanfang Zhang
Nonpolar/polar block copolymer materials can be used to develop high-performance dielectric elastomer materials. At present, there is no method to accurately predict its dielectric constant, which is not conducive to improving related research and development efficiency. For this, styrene–butadienestyrene triblock copolymer (SBS) block copolymer grafted modified by thioglycolic acid (TGA) is chosen as the research object. We propose a hybrid calculation method combining the group contribution method, the connectivity index method, and the dipole moment fluctuation method. The connectivity index method and the dipole moment fluctuation method calculate the dielectric constants of nonpolar and polar repeat units to provide accurate basic data for the group contribution method. In the calculation process, the Vogel model completes the mutual conversion between dielectric constant and molar polarizability. Both theoretical calculation and experimental verification show that the dielectric constant of SBS-TGA increases with the grafting rate. We found the correlation between theoretical calculations and experimental values and confirmed that the applicable frequency range of this method is 1 kHz–1000 kHz. This method can be extended to predict the dielectric constant of other polymers and improve development efficiency.
研究领域:
材料科学
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高分子科学
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介电材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）