Versatile MXene Gels Assisted by Brief and Low‑Strength Centrifugation  

作　　者：Weiyan Yu Yi Yang Yunjing Wang Lulin Hu Jingcheng Hao Lu Xu Weimin Liu 

机构地区：[1]State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,People’s Republic of China [2]Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai,Yantai 264006,People’s Republic of China [3]Key Laboratory of Colloid and Interface Chemistry and Key Laboratory of Special Aggregated Materials,Shandong University,Jinan 250100,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第5期231-247,共17页纳微快报（英文版）

基　　金：This work is financially supported by the Hundred Talents Program of Chinese Academy of Sciences(E30247YB);the Special Talents Program of Lanzhou Institute of Chemical Physics(E0SX0282);the National Natural Science Foundation of Shandong Province(ZR2022QB190);the Innovative Research Funds of Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai(E1R06SXM07,E1R06SXM09 and E2R06SXM14).

摘　　要：Due to the mutual repulsion between their hydrophilic surface terminations and the high surface energy facilitating their ran-dom restacking,2D MXene nanosheets usually cannot self-assemble into 3D macroscopic gels with various applications in the absence of proper linking agents.In this work,a rapid spontaneous gelation of Ti3C2Tx MXene with a very low dispersion concentration of 0.5 mg mL^(-1) into multifunctional architectures under moderate centrifugation is illustrated.The as-prepared MXene gels exhibit reconfigurable internal structures and tunable rheological,tribological,electrochemical,infrared-emissive and photothermal-conversion properties based on the pH-induced changes in the surface chemistry of Ti_(3)C_(2)T_(x) nanosheets.By adopting a gel with optimized pH value,high lubrication,exceptional specific capacitances(~635 and~408 F g^(-1) at 5 and 100 mV s^(-1),respectively),long-term capacitance retention(~96.7%after 10,000 cycles)and high-precision screen-or extrusion-printing into different high-resolution anticounterfeiting patterns can be achieved,thus displaying extensive potential applications in the fields of semi-solid lubrication,control-lable devices,supercapacitors,information encryption and infrared camouflaging.

关 键 词：MXene Centrifugation-assisted rapid gelation Lubrication SUPERCAPACITOR Anti-counterfeiting applications 

分 类 号：TQ427.26[化学工程]