CORROSION SCIENCE
·
2025
·
IF 8.5
Fengting Li,Wentao Qu,Yunchao Peng,Liqiang Yang,Li Wang,Huiling Su,Miantuo Li,Zhikun Wang,Jingyue Wang,Yu Fu,Songqing Hu
In this study, we developed ionic liquid-modified nitrogen-doped carbon dots (IL-NCDs) with enhanced π-π interactions, effectively addressing the aggregation issue of conventional carbon dots in strong acidic conditions. The synthesized IL-NCDs demonstrated superior dispersibility and long-term protective performance in 1 M HCl, achieving a corrosion inhibition efficiency of 97.34 % at 60 mg/L and maintaining protection for over 20 days. The optimized surface charge and increased active sites facilitated the formation of a dense protective film, offering an efficient and eco-friendly solution for metal corrosion protection in acidic environments, with significant potential for industrial applications.
研究领域:
材料科学
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腐蚀防护
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 13
·3306-3314
·
IF 5.256
Hai-Yi Zhong,Li Chen,Rong Yang,Zhi-Ying Meng,Xiao-Min Ding,Xiao-Feng Liu,Yu-Zhong Wang
An azobenzene-containing thermotropic liquid crystalline polyester showing unique thermo- and photo-responsive behaviours was synthesized by polycondensation from mesogenic dial 4,4′-bis(6-hydroxyhexyloxy)azobenzene (BHHAB) with 2-phenylsuccinic acid (PSA), and named as poly(4,4′-bis(6-hydroxyhexyloxy)azobenzene phenylsuccinate) (PBHPS). Liquid crystalline behaviours were investigated through differential scanning calorimetry (DSC), polarizing optical microscopy (POM) and wide-angle X-ray diffraction (WAXD). PBHPS showed a smectic phase with strong π–π interactions between the adjacent phenyl rings or between the side group and mesogenic unit, which could be regarded as physical crosslinking points that made PBHPS have good shape memory and self-healing properties. A series of PBHPS/methylcellulose bilayer films were prepared to study the reversible photo-mechanical properties. UV-vis absorption spectra were used to study the reversible photo-responsive behaviour of the polyester, proving that the reversible photoisomerization-induced volume expansion of the PBHPS layer resulted in good reversible photo-responsive properties.
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
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Qianyue Guo,Zhenquan Wang,Qijing Xu,Han Mao,Di Zhang,Saikat Ghosh,Nihar R. Pradhan,Bo Pan,Baoshan Xing
The colloidal heteroassociation between natural mineral colloids and engineered nanoparticles (ENPs) can reduce the bioavailability and toxicity of the ENPs. However, the efficacy of this heteroassociation-based entrapment of ENPs depends on the intrinsic material properties of the particles and the physicochemical parameters of the aquatic environment. Natural organic matter (NOM)-induced surface modifications of clay colloids, functionalization of ENPs, and efficiency of counterions as effective coagulants profoundly affect the effectiveness of heteroaggregation-based attenuation of anthropogenic colloids. In this study, tannic acid (TA), a surrogate of NOM, prevented the edge-to-face self-association of sodium-saturated kaolinite (Na-kaolinite) at acidic pH, as evaluated from the transverse proton spin–spin relaxation data (T 2 ). Likewise, fullerene water suspension (FWS) adhesion to Na-kaolinite prevented the self-association of Na-kaolinite and enhanced the colloidal stability. At pH 4 and diffusion-limited aggregation regime salt concentrations, the Na-kaolinite and FWS heteroaggregation rates were lower than the Na-kaolinite homoaggregation rates, and eventually reached a plateau. The higher colloidal stability of the Na-kaolinite and FWS binary mixture than that of Na-kaolinite, regardless of stronger charge screening by Ca 2+ , reflects steric stabilization. However, at pH 7, the increased electrostatic barrier reduces the feasibility of colloidal heteroassociation between Na-kaolinite and FWS; thus, higher salt concentrations are required to initiate aggregation. Weak adsorption of TA on Na-kaolinite at pH 7 facilitated stronger π-π interactions with FWS. All suspensions exhibited faster aggregate growth at pH 7 than pH 4, possibly due to the stronger cation response at pH 7. In situ atomic force microscopy imaging and line profile plots of Na-kaolinite, TA, and FWS mixture in CaCl 2 further corroborated the difference in the heteroaggregation rates observed at the two different pH values. Thus, TA-induced surface functionalization of FWS and the consequent increased electrostatic barrier to heteroassociation with Na-kaolinite may facilitate the environmental mobility of FWS in aquatic media.
研究领域:
环境科学
·
胶体化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2022
·
IF 2.042
Qingxuan Zhang,Yingjie Liu,Zengmin Lun,Jinhe Liu,Yuhui Zhang,Pujiang Yang
Asphaltene stabilizers are the main means to inhibit the flocculation and sedimentation of asphaltenes in crude oil exploitation, transportation, and refining operations. In this work, the interactions between asphaltenes and 2-dodecyl benzene sulfonic acid, 4-dodecyl benzene sulfonic acid, 4-dodecyl aniline, 4-dodecyl phenol, polyisobutylene succinic imide benzene boric acid and polyisobutylene succinic imide benzene sulfonic acid were studied by XPS, XRD, DLS, TEM and SEM methods. The aggregation behavior of asphaltenes in the absence and presence of stabilizers was characterized by analyzing asphaltene’s particle size, surface composition, and aggregate microstructure. It was observed that the interactions between asphaltene and stabilizers decreased asphaltene aggregate size in solution, and that the polymeric stabilizer with an acidic group was superior to the small-molecule stabilizer with an acidic group, but both better than chemicals with basic groups. It was found that stabilizer adsorption on asphaltenes affected the O, N, S contents of asphaltene surface and prompted formation of protonated pyridinic N+ and nitrogen-oxide -R-N+-O-, which further revealed that an acid-base reaction was the most effective at stabilizing asphaltene-stabilizer complexes, followed by π-π interactions and hydrogen bonds. We also found that the synergistic effects of π-π and acid-base reactions stimulated the transformation of 2-dodecyl benzene sulfonic acid adsorbed on asphaltene from the vertical state at low concentrations to the tiled arrangement at high concentrations. XRD results showed that adsorption of stabilizers on asphaltene increased the distance of asphaltene aromatic sheets and decreased the aggregation number of asphaltene to below the critical aggregation number of asphaltene tactoids.
研究领域:
石油化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2021
·
IF 5.645
Laihui Xiao,Shuai Li,Yigang Wang,Wenbin Li,Jie Chen,Jinrui Huang,Xiaoan Nie
Thermosets of the diglycidyl ether of bisphenol A (DGEBA) are normally brittle owing to its rigid structure. To address this problem, a bioinspired strategy to form sacrificial bonds in a curing system, which may enhance the flexibility of epoxy thermosets and maintain a favorable strength simultaneously has been proposed. A tung (Aleurites montana L.) oil diglyceride based-acid (TODGA) that may construct sacrificial bonds with the epoxy matrix in the form of π-π interactions was prepared, and was added into a DGEBA / polyetheramine curing system at varying ratios. TODGA can greatly improve the flexibility and toughness of epoxy thermosets. At the addition of 7.5 wt%, the elongation at break, toughness, and impact strength are improved from 5.9 % to 86.6 %, from 2.1 to 19.0 MJ m −3 , and from 4.3 to 5.9 kJ·m −2 respectively, while the tensile strength is maintained at 34.8 MPa. In comparison, the toughening effect of TODGA outperforms that of commercial epoxidized soybean (Glycine max (L.) Merr.) oil. Although TODGA is a flexible modifier, it does not significantly decrease glass transition temperature and thermal stability. These results demonstrate that fabricating sacrificial bonds is a practical way to toughen epoxy thermosets, and TODGA can be potentially utilized as a commercial toughening agent.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Peng Zhang,Xiangyang Mao,Bolun Yang
To enhance the adsorption desulfurization performance of graphene, graphene oxide was first hydrophobically modified by using dodecylamine and then reduced. Adsorption desulfurization experiments were performed on graphene with different degrees of reduction, where dibenzothiophene (DBT) was selected as thiophenic sulfur. FTIR, XRD, SEM, EDS, XPS, contact angle test, and elemental analysis showed that dodecylamine was successfully grafted onto a graphene surface, which could enhance the hydrophobic properties of graphene and effectively prevent the agglomeration of graphene sheets during the reduction process. Adsorption experiments showed that graphene with a higher degree of reduction had a larger DBT adsorption capacity. Density functional theory plus dispersion force correction calculation results showed that graphene with intact π-conjugated structure had the highest adsorption energy for DBT. Further population analysis showed that this π–π interaction was mainly caused by the dispersion force. The modification process can effectively recover the π-conjugated structure of graphene and enhance the π–π interaction with the thiophenic sulfur.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2012
·
IF 3.07
Peng Liao,Songhu Yuan,Wenbiao Zhang,Man Tong,Kun Wang
Adsorption of three nitrogen-heterocyclic compounds (NHCs), pyridine, indole, and quinoline, on a new porous carbonaceous adsorbent, bamboo charcoal (BC), is investigated. Different structures and surface properties of BC are created by HNO 3 and NaOH treatment as well as by microwave (MW) radiation. HNO 3 treatment decreases surface area, micropore volume, and surface hydrophobicity, whereas NaOH treatment increases surface area and micropore volume. MW treatment dramatically increases hydrophobicity and fraction of aromatic structure. Adsorption isotherms of NHCs are nonlinear and better fitted by Freundlich model (FM) compared with Langmuir model (LM) and Polanyi–Manes model (PMM). The maximum adsorption capacities for pyridine, indole, and quinoline reach 42.92, 93.24, and 91.74 mg g −1 , respectively, at an initial concentration of 200 mg L −1 . Surface area, hydrophobicicty, and electrostatic and π – π electron-donor–acceptor (EDA) interactions are accountable for NHC adsorption. A model relating NHC adsorption (log K ) and adsorbent–adsorbate physicochemical properties is developed to measure the relative contribution of these interactions giving the sequence of surface area > hydrophobic interaction > electrostatic interaction > π – π EDA interaction.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Soft Matter
·
2015
·Vol. 11
·期 23
·4621-4629
·
IF 4.029
Hailong Fan,Xiang Yu,Yang Liu,Zujin Shi,Huihui Liu,Zongxiu Nie,Decheng Wu,Zhaoxia Jin
Recent research has indicated that polydopamine and synthetic eumelanins are optoelectronic biomaterials in which one-dimensional aggregates composed of ordered-stacking oligomers have been proposed as unique organic semiconductors. However, improving the ordered-stacking of oligomers in polydopamine nanostructures is a big challenge. Herein, we first demonstrate how folic acid molecules influence the morphology and nanostructure of polydopamine via tuning the π–π interactions of oligomers. MALDI-TOF mass spectrometry reveals that porphyrin-like tetramers are characteristic of folic acid–polydopamine (FA–PDA) nanofibers. X-ray diffraction combined with simulation studies indicate that these oligomers favour aggregation into graphite-like ordered nanostructures via strong π–π interactions. High-resolution TEM characterization of carbonized FA–PDA hybrids show that in FA–PDA nanofibers the size of the graphite-like domains is over 100 nm. The addition of folic acid in polydopamine enhances the ordered stacking of oligomers in its nanostructure. Our study steps forward to discover the mystery of the structure–property relationship of FA–PDA hybrids. It paves a way to optimize the properties of PDA through the design and selection of oligomer structures.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2023
·
IF 4.6
Xinlan Hu,Yanyun Li,Hongfeng Chen,Jue Cheng,Qingsong Lian
Dispersion of Graphene (GE), high cost of massive usage of GE, and synergistic efficiency of GE and other fillers on epoxy resin (ER) are still challenges. This work not only achieves the uniform dispersion of few-layered GE through π-π interaction between GE and phenyl glycidyl ether (PGE), but also presents an equation in calculating the synergistic efficiency of multiple tougheners. The results show that the strength , modulus, elongation at break, and impact strength of ER can be simultaneously improved when D8 (an epoxy resin with side aliphatic chains) and PGE/GE are used together (D8/PG-X samples) or alone, and the D8/PG-X samples exhibit incomparable positive synergistic efficiency in both strength and toughness with ultralow GE content. The improvement of the impact strength , elongation at break, tensile modulus , and tensile strength in the optimum D8/PG-5 system is 115.5 %, 45.7 %, 17.8 %, and 28.3 % compared with unmodified ER system. We demonstrate that the improved comprehensive properties of the D8/PG-X samples as well as the improved interlaminar shear strength (ILSS) of the carbon fiber (CF)/ER composites can be ascribed to synergistic strengthening-toughening effect of self-assembly effect of aliphatic chains in D8 and uniformed dispersed GE (by π-π interaction). The impressive synergistic strengthening-toughening strategy can provide theoretical guidance for the preparation of high-performance ER with ultralow GE content.
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
LIQUID CRYSTALS
·
2016
·
IF 2.244
Dingqian Shi,Kun Hu,Pei Chen,Aiai Gao,Weisong Du,Ran Chen,Xinbing Chen,Zhongwei An
Fluorine is widely used as a lateral substituent to modify the physical properties of liquid crystals. Here, laterally monofluorinated compounds, 2-(4ʹ-alkoxy-2-fluorobiphenyl-4-yl)-benzoxazole derivatives (nPPF(2)Bx) bearing different substituents (H, CH3, NO2, coded as nPPF(2)BH, nPPF(2)BM and nPPF(2)BN, respectively) at 5-position, were synthesised and characterised. It is interesting to note that these only display enantiotropic nematic mesophases with mesophase ranges of 12–28°C and 13–45°C on heating and cooling for nPPF(2)BH, 46–97°C and 62–120°C for nPPF(2)BM and 82–108°C and 87–113°C for nPPF(2)BN, which are very different from the corresponding monofluorine-substituted analogue (compounds I) with enantiotropic smectic or smectic/nematic mesophases. The enhanced nematic mesophase is attributed to the reduced π–π interaction/conjugation resulting from the twisted structure of the molecule caused by the introduction of a fluorine atom into the inter-ring of the biphenyl unit. These results suggest that modification of the monofluorine substituent position is an effective method to improve the nematic mesophase in benzoxazole-liquid crystals.
研究领域:
材料科学
·
有机化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Xiaosi Sun,Peng Cui,Peiwen Wu,Kaihao Mo,Hanyu Zhang,Hao Ren,Haiyan Ji,Wenshuai Zhu,Zhichang Liu
Polycyclic aromatic hydrocarbons (PAHs) are serious organic pollutions and important industrial raw materials which are abundant in fluid catalytic cracking (FCC) diesel. Therefore, it is necessary to find suitable approach to remove PAHs from FCC diesel under mild condition. In this study, a series of deep eutectic solvents (DESs) were designed and synthesized as PAHs extractants. The tetraoctyl ammonium bromide (TOAB) and ethylene glycol (EG) with the molar ratio of 1:2, TOAB:2EG, exhibited great single extraction efficiency towards naphthalene (NAP, 55.6 %) and anthracene (ANT, 92.3 %). The orthogonal experiment proved the alkyl chain length of quaternary ammonium salt influenced PAHs extraction mostly. The high extraction efficiency was attributed to the hydrogen bonds, p-π and π-π interactions between PAHs and DESs. This work advances the DESs as PAHs extractants with high extraction efficiency and broadens the applications of DESs.
研究领域:
环境科学
·
化学工程
·
工业化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Yafang Han,Jun Shi,Jiwen Hu,Renjie Zhou,Ziyang Gong,Weile Li
The achievement of underwater bonding and maintaining bond stability are significant challenges due to interfacial water and hydration weakening adhesive bonds. In this study, a dry pressure-sensitive adhesive (PSA) was successfully developed through a one-step synthesis involving the random copolymerization of ethylene glycol phenyl ether acrylate (PEA), 2-ethylhexyl acrylate (2-EHA), and acrylic acid (AA). This PSA displayed good hydrophobicity, moderate Young’s modulus, and tensile strength, forming strong interfacial bonds with various substrates in water. The effect of the aromatic monomer PEA content on the adhesive properties, shear properties, and heat resistance of PSA was systematically investigated. Notably, at 10 mol % PEA content (P-AEP10), the PSA exhibited remarkable mechanical strength and bond strength, with an elastic modulus of 0.5353 MPa and tensile strength of 0.6882 MPa. The underwater peel strengths were 936.7 N/m (SS) and 1569.3 N/m (PET). The results indicate that π–π interactions significantly enhance the cohesive strength of the copolymer, enabling P-AEP10 to maintain excellent adhesive performance in water at 80 °C, with the static shear failure time extended to 880 h at room temperature. Additionally, the results obtained from underwater repair experiments demonstrated that the PSA did not exhibit secondary leakage for a period of 100 days following the repair procedure, thereby further substantiating its suitability for underwater repair and bonding applications. In conclusion, this study offers significant theoretical support and a practical foundation for the development and utilization of dry PSAs.
研究领域:
材料科学
·
化学工程
✓ 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）