Guo Kaidi, Wei Peng, Xie Yahong, Huang Xueli
MOE Key Laboratory of Oil and Gas Fine Chemicals, College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China.
Chem Commun (Camb). 2022 Apr 12;58(30):4723-4726. doi: 10.1039/d2cc00289b.
Smart ultra-stable foams stabilized by cellulose nanocrystal (CNC)-based gels were fabricated. The stabilization is ascribed to the dense films and three-dimensional networks at the interface and in the bulk induced by the charge shielding effect and electrostatic attraction between protonated bis(2-hydroxyethyl)oleylamine (BOA-H) micelles and negatively charged CNC colloids. The as-prepared foam could maintain its morphology without breaking or drainage for two months, showing high stability. Outstanding CO/N reversibility endows the system with on-demand control of foaming/defoaming, which is necessary in many aspects. The functionalized foam is expected to open up an opportunity for the design of intelligent oilfield chemicals and extinguishant systems.
制备了由纤维素纳米晶体（CNC）基凝胶稳定的智能超稳定泡沫。这种稳定性归因于质子化双（2-羟乙基）油胺（BOA-H）胶束与带负电的CNC胶体之间的电荷屏蔽效应和静电吸引在界面处和本体中诱导形成的致密薄膜和三维网络。所制备的泡沫能够在两个月内保持其形态而不破裂或排水，显示出高稳定性。出色的CO/N可逆性赋予该系统按需控制发泡/消泡的能力，这在许多方面都是必需的。这种功能化泡沫有望为智能油田化学品和灭火系统的设计开辟机会。
