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.
{"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}
Pub Date : 2025-11-01Epub Date: 2025-07-11DOI: 10.1016/j.cis.2025.103580
Erik Weiand, Francisco Rodriguez-Ropero, Yuri Roiter, Stefano Angioletti-Uberti, Daniele Dini, James P Ewen
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.
{"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}
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