Tunable macroscopic self-healing of supramolecular gel through host-guest inclusion
Li Z. Hao J. Lu Y. Hu W. Jiang H. Zhou B. Yang H. Kang W. Sarsenbekuly B.
1 November 2024American Institute of Physics
Physics of Fluids
2024#36Issue 11
Supramolecular gels (SGs) consisted of noncovalent cross-linking network structures are fascinating due to their efficient energy dissipation and reversible self-healing properties. However, it is unknown how the noncovalent interactions alter the macroscopic self-healing and mechanical properties of SGs. Herein, the peculiar nature of SGs manufactured by combining covalent and noncovalent (host-guest inclusion of β-cyclodextrin and C16 hydrophobic chain) cross-linking structures was studied and compared with covalent cross-linking preformed particle gels. The macroscopic self-healing behaviors, rheology, mechanical tensile properties, as well as the tunable mechanisms of self-healing were explored by visual inspection, rheological, and atomic force microscopy probing methods. The results show that the SGs exhibit excellent self-healing efficiency and mechanical strength after interfacial cutting. Moreover, the SGs exhibited excellent mechanical tensile properties, including loading-unloading, successive loading-unloading, and recovery loading-unloading tensile performances. Notably, the macroscopic self-healing of SGs has good tunability by changing the covalent and noncovalent crosslinker contents and salt contents. This peculiar phenomenon is attributed to certain host-guest inclusion forces (4.7 and 0.3 nN) between different SGs under the distilled and high-salinity water conditions, respectively. This study is beneficial for the development of stimuli-response supramolecular gels in different applications, such as oil recovery in fractured reservoirs.
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State Key Laboratory of Coking Coal Resources Green Exploitation, China University of Mining and Technology, Xuzhou, 221116, China
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, China
Chang Qing Oil Field Company The Third Oil Extraction Factory, Yinchuan, 750005, China
Exploration and Development Research Institute of Petrochina Changqing Oilfield Company, Xian, 710018, China
The Sixth Oil Production Plant of Petrochina Changqing Oilfield Company, Xian, 710018, China
School of Energy, Oil and Gas Industry, Kazakh-British Technical University, Almaty, 050000, Kazakhstan
State Key Laboratory of Coking Coal Resources Green Exploitation
School of Petroleum Engineering
Chang Qing Oil Field Company The Third Oil Extraction Factory
Exploration and Development Research Institute of Petrochina Changqing Oilfield Company
The Sixth Oil Production Plant of Petrochina Changqing Oilfield Company
School of Energy
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