文献类型：期刊文献

英文题名：Multiscale Dynamic Assembly of CO2-Switchable Amphiphilic Carbon Dots for Reversible Foam Stabilization and Tunable Bubble Dynamics

作者：Yang, Yuying[1]; Gao, Qianqian[1,3]; Wei, Peng[1]; Sun, Hui[1,2]

机构：[1] MOE Key Laboratory of Oil and Gas Fine Chemicals, College of Chemical Engineering and Technology, Xinjiang University, Urumqi, 830046, China; [2] School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [3] Guodian Power Xinjiang New Energy Development Co., Ltd, Urumqi, 830046, China

年份：2026

外文期刊名：SSRN

收录：EI(收录号：20260271174)

语种：英文

外文关键词：Adsorption - Bubbles (in fluids) - Carbon - Carbon dioxide - Foam control - Foams - Mass transfer - Nanoparticles - Stabilization - Surface treatment

摘要：Amphiphilic nanoparticles have recently drawn significant attention for foam stabilization; however, the application of conventional nanoparticles remains restricted due to their limited interfacial activity, poor dispersibility, and complex surface modification requirements. Herein, amphiphilic carbon dots (ACDs) with diameters of 1.2–2.5 nm are synthesized via a one-pot solvothermal method, representing a novel class of stimuli-responsive nanomaterials. Upon CO2 protonation, ACDs lower the interfacial tension to 22–24 mN/m, and larger ones possess high desorption energy (> 60 kBT) with irreversible adsorption, achieving superior foam stability (half-life up to 393 minutes). Meanwhile, ACDs form dense adsorption layers and ~ 160 nm aggregates that induce a jamming effect, thereby suppressing liquid film drainage and reducing the thinning exponent β from 0.71 to 0.33. Furthermore, ACDs exhibit reversible CO2/N2 switchability over five cycles and, under microfluidic flow, promote CO2-driven bubble generation through a dynamic deaggregation–adsorption coupling mechanism that controls bubble mass transfer and breakup behavior. Collectively, these ACDs overcome the interfacial and dispersion limitations of traditional nanomaterials, establishing a new paradigm of stimuli-responsive, dynamically adaptive foam stabilizers for smart foam preparation and microfluidic bubble control. ? 2026, The Authors. All rights reserved.