Advances in colloid and interface science最新文献

Polydopamine (PDA) is a bioinspired polymer that mimics the adhesion of mussels. PDA architecture is highly dynamic and can transform from planar two-dimensional (2D) films into more sophisticated porous, hierarchical three-dimensional (3D) and even four-dimensional (4D) dynamic structures. PDA with these well-defined architectures offers highly fascinating properties, such as tunable catechol chemistry, excellent adhesion, dynamic redox activity, improved mass transport and switchable responsiveness to external stimuli, which are increasingly demanding in biomedical, environmental and catalytic applications. We comprehensively review the key concepts and underlying principles regarding chemistry, oxidative polymerization, and interfacial assembly mechanisms that govern the dimensional transition of PDA. Particular emphasis is placed on advances in soft and hard templating strategies that enable control over morphology, porosity, and surface functionality. This review also highlights recent breakthroughs and critical milestones in the fabrication of PDA-based nanozymes, injectable hydrogels, and other 3D/4D hierarchical scaffolds for applications in tissue engineering, biosensing and environmental remediation. Finally, this review concludes with a future perspective that outlines existing challenges and possible strategies to overcome obstacles in the practical integration of multi-dimensional PDA architectures for building responsive bioinspired devices. This review can act as a roadmap to guide researchers toward concepts that can be used in the design of next-generation smart materials, while also highlighting the current advancements in the field.

The moving contact line problem is crucial in the study of multiphase flow, which involves how the interfaces between fluid phases move and deform on a solid surface. The study of moving contact lines covers areas such as biomedical systems, petroleum production, and transport in porous media. But because the behavior of the fluid near the contact line is highly complex and influenced by a variety of factors such as boundary conditions, surface tension, solid surface properties and external disturbances, precisely simulating and predicting the behavior of the contact line has become an extremely challenging subject. The complexity of the moving contact line dynamics model, with its multi-scale characteristics of microscopic molecular interactions and macroscopic fluid behavior, is a key scientific issue in interface science. With the development of computing technology, a variety of dynamic models for describing the phenomenon of moving contact lines have been proposed to address this challenge. This paper systematically reviews multi-scale moving contact line dynamics models ranging from molecular kinetic to continuous hydrodynamics theory. In addition, the application of moving contact lines in interface science is explored, the research progress in this field is summarized, and prospects for the future development direction of multi-scale model fusion are presented.

Marine biofouling is a major challenge to the application of titanium alloys (TAs) in marine engineering equipment and offshore structures. In recent years, surface reconfiguration has attracted increasing interest as a strategy to mitigate biofouling on TA surfaces. Reconfigurable TA surfaces are fabricated through physical or chemical methods, which construct antifouling micro/nano-structures or molecular layers on the TA substrates, forming integrated functional-structural antifouling surfaces. The design of reconfigurable surfaces is based on a deep understanding of the interactions between fouling organisms and material surfaces. Through the precise control of TA surface properties, the key adhesion processes of fouling organisms, including surface sensing, physical anchoring, and molecular binding, can be disrupted, thereby undermining the foundation for biofouling. This integrated functional-structural antifouling strategy addresses the weak adhesion between conventional organic coatings and the passive layer of TAs, and achieves highly efficient and eco-friendly antifouling performance without releasing toxic agents. This perspective systematically summarizes the recent advances in reconfigurable TA surfaces for marine antifouling, including the reconfiguration mechanisms, surface designs, and their application scenarios, divided into the three categories of smooth, rough, and slippery surfaces. Finally, the key challenges in this field are identified, and future directions to advance marine antifouling are proposed.

Amyloid fibrils derived from food proteins (PAFs) represent highly ordered supramolecular assemblies with distinctive β-sheet-rich architectures, exceptional mechanical robustness, and remarkable environmental stability. These nano-structured materials have emerged as promising bio-derived platforms for engineering sustainable, functional, and structurally tunable food systems, as well as advanced biomaterials. Conventional thermal acid-induced fibrillization, while effective, is constrained by long processing times, high energy demands, and limited structural control. Recent breakthroughs in processing technologies, i.e., high-pressure treatment, ultrasonication, cold plasma, moderate electric fields, ohmic and microwave heating, ultraviolet irradiation, radio frequency heating, pH modulation, and enzymatic hydrolysis, offer unprecedented precision in modulating fibrillation kinetics, morphology, and functional performance. This review systematically investigates the molecular mechanisms, processing parameters, and structure-function interrelationships underpinning these emerging methodologies. By integrating advancements in process engineering, protein chemistry, and materials science, we highlight innovative routes to optimize PAF production, enabling the creation of advanced nanostructures with transformative potential for food, biomedical, and cross-industry applications.

With the increasing depletion of terrestrial resources and growing environmental concerns, the exploration and exploitation of deep-sea resources have attracted significant global attention. However, materials and equipment applied in deep-sea environments face severe corrosion risks due to extreme harsh conditions. Organic coatings are employed for corrosion protection in deep sea owing to their excellent barrier properties, mechanical performance, strong adhesion, and tunable functionalities. Nevertheless, conventional organic coatings frequently suffer from premature failure in deep-sea environments, severely restricting the efficiency and continuity of deep-sea exploration activities. This review systematically introduces recent research on failure mechanisms of organic coatings in deep-sea environments, highlighting critical factors such as (alternating) hydrostatic pressure, fluid flow, biofouling and thermal aging. Furthermore, advanced enhancement strategies including optimization of resin cross-linking density, self-healing capability, hydrophobic modification, interfacial reinforcement and topcoat design are thoroughly discussed. Finally, challenges and future perspectives for developing robust and multifunctional organic protective coating for deep-sea environment application are proposed.

Owing to their distinct properties, carriers of active compounds are gaining increasing interest not only in the pharmaceutical industry, but also in the food, dietary supplement, and cosmetics sectors. The concept of encapsulating active molecules within nanoparticles enables the enhancement of their activity, bioavailability, and stability, as well as targeted delivery to specific sites of action, minimizing side effects. Given that a significant proportion of studied nanoparticles are colloidal systems, surface-active compounds constitute an essential component, ensuring the stability of dispersions. For this reason, cyclic lipopeptides are particularly intriguing candidates for incorporation into carriers. As biosurfactants, they possess valuable dispersion stabilizing properties and exhibit diverse biological activities. This dual functionality makes them not only potential building blocks but also active compounds. Moreover, as they are produced via microbial fermentation processes, these compounds are fully renewable resources, aligning well with the principles of eco-technology. This review aims to summarize the current state of knowledge regarding the incorporation of cyclic lipopeptides into carriers of active compounds.

Chloride adsorption plays an important role in the penetration of chloride ions and the initiation of steel reinforcement corrosion in concrete. This review focuses on the reversible physical adsorption of chloride ions (Py_Cl^-) on C-S-H and summarizes its theoretical basis, major characterization approaches, key influencing factors, and relevance to chloride transport. To strengthen clarity and comparability across studies, this review relates Py_Cl^- behavior to electrical double layer formation and surface potential regulation, discusses multicomponent ionic competition, and critically evaluates what commonly used experimental probes can and cannot resolve in cementitious pore environments, including isothermal adsorption, zeta potential, alternating current impedance spectroscopy, and pore solution expression. This review further highlights the complementary roles of molecular-scale simulations and surface complexation modeling in supporting the interpretation and mechanistic understanding of Py_Cl^-. Finally, this review discusses the current challenges and potential directions for future research in this area.

Nanofluidic membranes, featuring angstrom-to-nanometer transport pathways where interfacial effects dominate, have rapidly evolved into a versatile platform for selective ion transport, energy conversion, sensing, and advanced separations. This review consolidates two decades of progress by (i) summarizing the governing electrokinetic mechanisms in confined nanochannels (e.g., electric double-layer regulation, ion selectivity, and ionic current rectification), (ii) providing a multidimensional classification of nanofluidic membranes based on channel dimensionality, constituent materials, structural origin, and channel-wall properties, and (iii) critically comparing key fabrication strategies alongside modeling and simulation approaches used to rationalize transport and guide design. We further highlight persistent barriers to practical implementation, including scalable manufacturing of well-defined nanochannels, stability and fouling resistance under realistic conditions, and the need for standardized performance metrics and predictive structure-property relationships. By linking mechanism, architecture, and fabrication to performance and limitations, this review offers an integrated framework and actionable perspectives to accelerate the translation of nanofluidic membranes from model systems to robust membrane-based technologies.

Multiphase flow in porous media is an extreme case in colloid and interface science. The large surface area amplifies solid-fluid interactions and the complex pore space causes a wide range of flow regimes with rich spatio-temporal dynamics posing a major challenge for deriving transport equations. Historically, macroscopic two-phase flow is described through phenomenological extensions of Darcy's law, which - besides many other shortcomings and inconsistencies - covers strictly only the connected pathway flow regime at very low flow rates while regimes with moving interfaces and associated topological changes are entirely implicit. Developing a description for all flow regimes by upscaling from pore to Darcy scale represents a long-standing challenge. Over the past decades, the field advanced by introducing thermodynamic approaches, geometric state variables for capillarity and capturing non-equilibrium effects. Experimental insights, enabled by advances in pore-scale imaging and modeling, has motivated several novel recent approaches which inherently include fluctuations and intermittency, and thereby avoid previous limiting assumptions. They cover the physics of the three dominant flow regimes: (I) the capillary-dominated regime, consisting of connected pathway flow with capillary fluctuations is covered by the space-time averaging approach and by the extended nonequilibrium thermodynamic theory (NET), resulting in linear laws; (II) the nonlinear flow regime, where capillary states become increasingly accessible by viscous mobilization leading to ganglion dynamics and intermittency, is described by the statistical thermodynamics approach; (III) the viscous limit consisting of drop-traffic, is described by the NET approach, which utilizes the fluctuation-dissipation theorem and Onsager reciprocal relationships leading again to a linear law, or the statistical thermodynamics approach. Most applications reside in regime I which is the most complex and least intuitive because it is a "frozen state". A better starting point is regime III which is from the perspective of dynamics, and then approaching successively regime II and I. We conclude with open questions and invite to contribute steering the theoretical advances towards application. The most immediate is using the co-moving velocity, which utilizes inherent symmetries in the 2-phase Darcy equations, to constrain the functional form of relative permeability and thereby simplify measurement protocols. The choice of state variables and the statistical thermodynamics approach that establishes relationships between them can be used to replace empirical hysteresis models. Grounding transport laws in thermodynamic concepts opens new possibilities for describing coupled transport phenomena in many relevant applications.

Interfacial dynamics of water droplets on graphite determine the performances of material synthesis, deep geo-energy recovery and storage, etc., where high temperature and high pressure prevail. However, these dynamics under such harsh conditions are rarely explored. Therefore, we quantified wetting and evaporation characteristics as a function of temperature (25-150 °C), pressure (5 and 10 MPa), and gas type (CO₂ vs N₂) using droplet profile measurements and estimated diffusion coefficients (D) via theoretical analysis. Results showed that a higher temperature led to a smaller contact angle (θ) and a larger evaporation rate. Specifically, for CO₂ at 10 MPa, as temperature increased from 25 to 100 °C, θ decreased dramatically from 156° to 86°, indicating a transition from strong gas-wet to intermediate-wet; evaporation was negligible. As temperature further increased from 100 to 150 °C, θ decreased slowly from 86° to 69°, indicating a shift from intermediate-wet to weakly water-wet; the evaporation rate increased by nearly 12 times (from 0.006 to 0.072 μL·s^-1). In contrast, for N₂ at 10 MPa, θ decreased linearly from 91° to 73° as temperature increased from 25 to 150 °C. A higher pressure resulted a larger θ for both CO₂ and N₂. Finally, the estimated D under the evaporation conditions (100-150 °C at 5 and 10 MPa) ranged from 1.58×10^-6 to 6.18×10^-6 m²·s^-1, showing a weak dependence on thermo-physical parameters and gas type. These results provide significant insights into interfacial dynamics of water droplet on carbonaceous surfaces under harsh conditions.