Frontiers in Physics
·
2024
·
IF 1.9
Lu Liqun,Wang Fengjuan,Wang Yuncheng,Zhang Jiawen,Xiang Li,Liu Zhiyong,Jiang Jinyang
Hydrophobic interactions are widely applied in diverse fields, yet the effect of the degree of hydrophobicity on the interactions between hydrophobic surfaces is still unaddressed, limiting the development of functional hydrophobic surfaces. In this study, the interfacial interactions and configuration of hydrophobic chains on surfaces with ranging hydrophobicity are surveyed by surface forces apparatus. Our findings revealed that with partial hydrophobicity, a long-range electrical double-layer repulsive force pertains between surfaces, while between fully hydrophobized surfaces, only steric hindrance is observed, and the hydrophobic chains maintain configuration even after long time compression. Our findings provide useful implications for understanding hydrophobic interactions.
研究领域:
材料科学
·
界面化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2011
·
IF 4.524
Zhuo Ao,Guangming Liu,Guangzhao Zhang
We have investigated the ion specificity at low salt concentrations in view of surface force by use of total internal reflection microscopy (TIRM). The polystyrene (PS) particle−glass slide interaction potential energies in different salt solutions have been measured as a function of the concentration of each salt, and the separation distance (hm) corresponding to the minimum potential energy as well as the Debye length (κ−1) are obtained from the potential profiles. In the case of cation specificity, a V-shaped cation series is observed in terms of hm, which is attributed to the difference in the direct interactions between the cations and the sulfate groups on the particle surface on the basis of the law of matching water affinities. The cation specificity of κ−1 indicates that the effective double layer thickness increases with the effective size of hydrated counterions. In the case of anion specificity, the anion sequence in terms of hm also exhibits a V-shaped series due to the accumulation or exclusion of anions near the particle surface. Moreover, the anion specificity of κ−1 is more complex than the cation specificity because the distribution of anions in the electrical double layer is influenced by both the anion−surface and anion−cation interactions.
研究领域:
物理化学
·
界面科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jin Jia,Jun-Hong Liu,Shan Wang,Xiang-Jun Zha,Kai Ke,Zheng-Ying Liu,Petra Pötschke,Ming-Bo Yang,Wei Yang
Wearable strain sensors with high sensitivity and linear resistance signal response to strain are urgently demanded for human–machine interface, which can be tuned by introducing uneven surface mechanics distribution onto fiber surfaces via structural heterogeneity for fibrous elastomer fiber mat sensors. Yet it is still of great challenge to build micro- or nano-scale heterogeneous structures on fiber surfaces in a facile and scalable way without using templates. Herein, we report a plastic nanosphere-decorated elastomer fiber mat strain sensor with a zoned surface strain energy release characteristic, designed based on analysis of material match and structural mechanics. Surface mechanics analysis confirms that the as-designed sensor shows a controllable strain energy release area, significantly improving sensing stability thanks to effective restriction of micro-crack propagation in conductive pathways. In particular, fibrous mat sensor with high-density nanospheres shows very low fluctuation in strain sensitivity variation (±0.05 for strain ≤ 30 %), i.e., good linearity in the resistance response to strain, while that for the control sensor is ± 10.0 for strain ≤ 16 %. Such a fiber mat strain sensor can not only be applied for real-time sensing of object deformations for human–machine interface and intelligent control, but also in hydrophobic porous elastomeric packaging materials and triboelectric devices.
研究领域:
材料科学
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传感器技术
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Yipeng Fei,Xingyi Zhou,Jinbo Liu,Haoxuan Xia,Jueyong Ning,Li Liu,Peng Zhu,Ruiqi Shen
The controlled construction of hybrid material structures can effectively regulate the physical, chemical, and functional properties of materials. This work explores the feasibility of coupling microdroplets technology and photopolymerization methods to achieve controllable construction of hybrid structures on the surface of ultrafine zirconium (Zr) powder, and investigates the effects of different hybrid structures on the surface mechanical properties, thermal oxidation performance, and electrostatic safety of Zr powder. The photopolymerization reaction process of PMMA on the surface of Zr powder was analyzed, revealing the principle of accelerated photopolymerization reactions within microdroplets, which was experimentally validated. Furthermore, by altering the polymerization reaction conditions and with the assistance of hydrofluoric acid (HF), a mechanism for controlling the hybrid structures on the surface of Zr powder was proposed. The results demonstrated that the collaborative effect of microdroplets and photopolymerization methods efficiently controlled the content and structural characteristics of the PMMA coating on the surface of Zr powder. The further introduction of HF was found to adjust the morphology of the surface hybrid structures and significantly improve the thermal oxidation performance and electrostatic safety of the Zr powder. These findings provided insights into the surface property regulation of active energetic materials and paved the way for the controlled preparation of inorganic–organic hybrid materials.
研究领域:
材料科学
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化学工程
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表面化学
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高分子科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2021
·Vol. 98
·期 1
·35-44
·
IF 2.326
Yeung Ka-Wai,Chen Ling,Tang Chak-Yin,Choy Man-Tik,Akinwekomi Akeem Damilola,Law Wing-Cheung,Tsui Gary Chi-Pong
UV protection and coatings for plastics are important in many applications. The cladding of low microwave (MW) absorption composite coatings on high MW transparent plastic substrates is a challenge due to their disparate dielectric properties. Moreover, an uneven heat energy conversion within the composite creates an additional hurdle in producing a coating with good surface integrity. In this study, a protocol was developed to overcome these difficulties based on a hybrid approach. The adverse effect of temperature mismatch between the coating and substrate was reduced through a two-way susceptor-aided heating mechanism. Low MW absorbing sol–gel derived composite coatings consisting of silicon dioxide (SiO 2 ) and titanium dioxide (TiO 2 ) were successfully cladded on the surface of MW and visual light transparent polycarbonate to produce a clear protective coating with UV-resistance. Nanoindentation tests were conducted to assess the effectiveness of the proposed protocol. Significant enhancement in the surface elastic modulus and hardness were achieved.
Schematic of hybrid MW cladding of sol–gel derived SiO 2 /TiO 2 coating on polycarbonate. The heat energy transferred to the sample is a combination of (1) the heat generated through MW coupling of the SiO 2 /TiO 2 coating and (2) the heat transfer by conduction, convection, and radiation from the heated. This process promotes hydrolysis and condensation reactions, leading to fast densification of the coating. Moreover, the difficulty of processing low microwave absorbing and microwave transparent materials simultaneously has been overcome. As a result, a crack-free SiO 2 /TiO 2 coating with enhanced surface mechanical properties can be produced within a minute.
研究领域:
材料科学
·
表面工程
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纳米技术
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光学涂层
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高分子材料加工
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Hongna Ding,Erlong Yang,Jihong Zhang,Zhejun Pan,Yugao Wang,Sheikh Rahman,Srinivas Mettu
Carbon quantum dots (CQDs) are a class of zero-dimensional carbon nanomaterials recognized for their unique fluorescent properties, demonstrating significant potential across various fields. However, their application in the petroleum industry has not been adequately explored. This paper synthesized coal-based CQDs (coal dots) using a chemical oxidation method, achieving a mass yield of over 90 %. The coal dots had an average diameter of 2.4 nm and carried hydroxyl and carboxylic acid groups, making them hydrophilic and negatively charged. Their potential application as an oil displacement agent for enhanced oil recovery (EOR) was examined, resulting in an incremental oil recovery of 12.0 % in low-permeability rocks and 4.5 % in tight rocks. Our exploration of solid-fluid and fluid-fluid interactions suggested that wettability alteration, driven by the repulsive structural forces within the framework of surface forces, contributed to the EOR achieved with coal dots. The integration of coal dots into EOR can lead to the effective and sustainable development of both petroleum and coal resources.
研究领域:
石油工程
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纳米材料科学
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化学工程
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能源资源工程
·
胶体与界面科学
✓ 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）