{"title":"Active drops driven by surface and polymorphic phase transitions: Current understanding and emerging perspectives.","authors":"Diana Cholakova","doi":"10.1016/j.cis.2025.103624","DOIUrl":"10.1016/j.cis.2025.103624","url":null,"abstract":"<p><p>Small emulsion droplets typically adopt spherical shapes under positive interfacial tension, minimizing unfavorable oil-water contact. This shape, along with the initial drop size, are generally preserved upon drop freezing or melting. However, in a series of studies, we demonstrated that simple temperature fluctuations near the melting point of the dispersed oil phase can spontaneously induce a wide range of dynamic behaviors in droplets. These activities include morphogenesis into various non-spherical shapes such as hexagonal, triangular, and tetragonal platelets, rods and fibers; the formation of complex composite micrometer-sized structures in the presence of adsorbed latex particles on initially spherical droplets; spontaneous desorption of the initially adsorbed particles; the generation of synthetic microswimmers capable of self-propulsion through the continuous phase, driven by the rapidly growing elastic filaments; spontaneous drop fragmentation and bursting into smaller particles (with sizes down to 20 nm) without any mechanical energy input; and the engulfment of the surrounding media spontaneously producing double water-in-oil-in-water droplets. All these phenomena were found to be intricately related to surface and polymorphic phase transitions proceeding within the droplets. The underlying mechanisms and control parameters were systematically investigated and published in a series of papers. The present review aims to summarize the key discoveries, present them within a unified conceptual framework, and compare them with other processes reported in the literature to lead to similar outcomes. Furthermore, the practical implications of these phenomena are discussed, and potential future research directions in this emerging area at the intersection of emulsion science and phase transition phenomena are outlined.</p>","PeriodicalId":93859,"journal":{"name":"Advances in colloid and interface science","volume":"345 ","pages":"103624"},"PeriodicalIF":19.3,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144812765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sonali S Naik, Naba K Dutta, Kiran Sukumaran Nair, Namita Roy Choudhury
{"title":"Critical advances in biofabrication and biomaterial strategies in tracheal tissue engineering: A comprehensive overview.","authors":"Sonali S Naik, Naba K Dutta, Kiran Sukumaran Nair, Namita Roy Choudhury","doi":"10.1016/j.cis.2025.103604","DOIUrl":"10.1016/j.cis.2025.103604","url":null,"abstract":"<p><p>The trachea is a vital respiratory organ that connects the larynx to the lungs and performs crucial functions. Various conditions can cause severe and often irreversible damage to individuals trachea of all age groups. Tracheal regeneration remains a major challenge in respiratory medicine, requiring a innovative solutions to address various underlying causes. Existing clinical interventions often have significant limitations and associated complications. Tissue engineering has potential, but its effectiveness has been limited due to challenges such as poor durability and insufficient revascularization. This review aims to provide a comprehensive exploration of the landscape of tracheal regeneration, shedding light on the path towards advancements in addressing extensive tracheal defects. It follows a structured approach, introducing various surgical procedures, along with their associated complications. Subsequently, it delves into the myriad biomaterials investigated in the realm of tracheal tissue engineering, emphasizing the significance of design considerations in scaffold fabrication. The review then navigates through various platforms utilized in tracheal tissue engineering and recent innovative approaches employed in this domain. Additionally, it provides insights into the clinical translation of tissue-engineered trachea, highlighting recent advancements and challenges encountered in real-world applications. Finally, it discusses the significant challenges and offers a perspective outlook on the future of tracheal tissue engineering. Addressing current limitations and envisioning novel strategies, the review contributes to the ongoing dialogue and progression in this critical field of regenerative medicine.</p>","PeriodicalId":93859,"journal":{"name":"Advances in colloid and interface science","volume":"345 ","pages":"103604"},"PeriodicalIF":19.3,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144801211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Advances of self-assembly behaviors in polymer systems for improved oil recovery (IOR) in unconventional reservoirs.","authors":"Zhe Li, Bobo Zhou, Yao Lu, Hongbin Yang, Haizhuang Jiang, Wanli Kang, Yaowen Xing, Xiahui Gui","doi":"10.1016/j.cis.2025.103622","DOIUrl":"10.1016/j.cis.2025.103622","url":null,"abstract":"<p><p>Traditional polymer systems including polymer and polymer gels face efficiency limitations in harsh unconventional reservoirs (low-permeability, high-temperature, high-salinity, serious-heterogenous, etc.) due to insufficient bulk/interfacial self-assembly capability. In recent decades, several self-assembly strengthening methods have been introduced into polymer systems to endow them bespoke functionalities and responsiveness suitable for different conditions. This review comprehensively analyzes advances in self-assembly-strengthened polymer systems for improved oil recovery (IOR), including molecular structure, synthesis methods and functional monomers from intrinsic principles and extrinsic functions and focusing on supramolecular interactions (hydrophobic association, host-guest inclusion, electrostatic forces), functional structures, and nanohybrid strategies. We detail how these approaches enhance bulk viscosity, interfacial activity, and conformance control in self-assembly polymer/gel systems while improving temperature/salinity resistance. And the practical efficacy is demonstrated through field validations in China, UAE, and Indonesia. Finally, the challenges and prospects for the self-assembly strengthening techniques for IOR in unconventional reservoirs are involved and systematically addressed. The deep understanding and precise regulation of self-assembly behaviors can open the way toward adaptive and evolutive polymer-based IOR technologies, a further step toward the cost-effective production of unconventional oil/gas resources.</p>","PeriodicalId":93859,"journal":{"name":"Advances in colloid and interface science","volume":"345 ","pages":"103622"},"PeriodicalIF":19.3,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144812766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Erik Weiand, Francisco Rodriguez-Ropero, Yuri Roiter, Stefano Angioletti-Uberti, Daniele Dini, James P Ewen
{"title":"Understanding and controlling the friction of human hair.","authors":"Erik Weiand, Francisco Rodriguez-Ropero, Yuri Roiter, Stefano Angioletti-Uberti, Daniele Dini, James P Ewen","doi":"10.1016/j.cis.2025.103580","DOIUrl":"10.1016/j.cis.2025.103580","url":null,"abstract":"<p><p>Pleasant sensory perception when touching, brushing, and combing hair is largely determined by hair friction. As hair ages and weathers, its friction increases, mainly due to the progressive loss of the protective 18-methyleicosanoic acid (18-MEA) monolayer on its surface. Hair also displays anisotropic friction due to the protruding edges of the cuticles, which can interlock when sliding towards the root of hair. Moreover, certain chemical (e.g. bleaching and colouring), thermal (e.g. straightening and curling), and mechanical (e.g. brushing and combing) processes can dramatically accelerate 18-MEA loss, leading to much higher friction and unsatisfactory sensory perception. Hair care products, and in particular conditioners, have been developed to temporarily repair this damage through the deposition of various chemicals on the surface of the hair. These formulations can reduce friction to levels similar to that measured for virgin hair. Other external factors can also affect hair friction, such as humidity and cleanliness, as well as biological characteristics, such as ethnicity and age. Here, we provide a perspective on the advances made in the field of hair tribology, meaning the friction, lubrication and wear of hair. Historic and state-of-the-art experimental, theoretic and computational techniques for measuring hair friction are reviewed. We discuss different hair friction mechanisms across the scales and review the roles of surface chemistry and surface roughness on hair tribology. The influence of hair care products on hair friction is further discussed. Finally, we highlight open challenges and opportunities for future hair tribology experiments and models.</p>","PeriodicalId":93859,"journal":{"name":"Advances in colloid and interface science","volume":"345 ","pages":"103580"},"PeriodicalIF":19.3,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144812767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Tissue engineering: Hydrogel scaffolds and mechanical properties as key design parameters.","authors":"Amit Kumar Goswami, Vinay Kumar Giduturi, Surya Narayana Yerramilli, Virander Singh Chauhan, Nitin Yadav","doi":"10.1016/j.cis.2025.103691","DOIUrl":"https://doi.org/10.1016/j.cis.2025.103691","url":null,"abstract":"<p><p>The global demand for effective tissue regeneration strategies continues to rise due to the increasing burden of trauma, chronic diseases, and age-related tissue degeneration. Hydrogels are widely explored as promising biomaterials for tissue engineering due to their high water content, swelling capacity, ability to absorb liquid exudates, flexible structure, and structural resemblance to the extracellular matrix. Under appropriate design and formulation, many hydrogels also demonstrate favorable levels of biocompatibility; however, this property can vary depending on the composition, crosslinking chemistry, and degradation products of the hydrogel. Among the key design parameters, the mechanical properties of hydrogels are critical determinants of their success in tissue engineering, as they directly govern cell-matrix interactions through mechanotransduction. The stiffness and viscoelasticity of the scaffold influence cell adhesion, migration, proliferation, and lineage commitment, while adequate compressive strength and shear resistance are required to preserve structural integrity under physiological loads. Precise tuning of these parameters is essential to reproduce the biomechanical milieu of native tissues and to achieve functional regeneration. Hydrogels are diverse in origin and chemistry, ranging from natural polymers to synthetic and charged networks, each offering unique advantages and limitations. Their versatility has enabled the development of application-specific scaffolds for skin, bone, cartilage, neural, and cardiac tissue regeneration. However, challenges remain in achieving mechanical robustness, long-term stability, and functional integration in vivo. Advances in material science and crosslinking technologies continue to drive the evolution of hydrogel systems with improved mechanical performance and biological response. This review presents a comprehensive scientific perspective on the significance of mechanical properties in hydrogel-based scaffolds and their relevance to tissue-specific applications, offering insights into future directions in regenerative medicine.</p>","PeriodicalId":93859,"journal":{"name":"Advances in colloid and interface science","volume":"347 ","pages":"103691"},"PeriodicalIF":19.3,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145350431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}