Cucurbit[n]uril-based supramolecular hydrogels: Synthesis, properties and applications

When nanocellulose meets hydrogels: the exciting story of nanocellulose hydrogels taking flight

“…76 By forming covalent bonds between polymer chains, chemical crosslinking accomplishes gelation, resulting in the formation of hydrogels with enhanced stability and persistence. 77 In addition, chemical crosslinking allows the incorporation of specific functional groups or chemical modification using various crosslinkers and reaction conditions to impart particular properties and functions to hydrogels. 78 The surface of nanocellulose possesses abundant hydroxyl groups, providing a solid foundation for the fabrication of nanocellulose hydrogels based on physical or chemical crosslinking.…”

Molecular Dynamics Simulations of Supramolecular Polymers within Nanoconfinements for Enhanced Oil Recovery

“…In 1973, the laureate of the Nobel Prize, L. M. Lehn, initially introduced the notion of supramolecules. These entities encompass systematic structures and distinct functionalities, brought together by an array of chemical compounds through noncovalent interactions, a departure from conventional substances linked by covalent bonds. − They uphold the inherent attributes of individual molecules while additionally eliciting distinctive properties through the interplay among their constituents. − In recent years, the utilization of supramolecular interactions within the petroleum sector has captivated considerable attention among researchers. ,− Water-soluble polymers play a key role in adjusting the water/oil mobility ratio by increasing the viscosity of the aqueous solution, thereby enhancing the volumetric sweep efficiency. Polyacrylamide (PAA), being cost-effective and exhibiting excellent thickening capabilities, stands out as a primary polymer choice for effective mobility control. , However, these polymers are susceptible to irreversible chemical degradation when they pass through the pore throats of underground reservoirs.…”

Versatile Graphene Oxide Hybrid Supramolecular Hydrogel Driven by Host–Guest Interaction Showing Excellent Mechanical and Sensing Properties and Photothermal Responsiveness

“…Macrocyclic hosts, such as crown ether, cyclodextrin, calixarene, pillararene, and cucurbituril, play a very important role in the development of advanced supramolecular hydrogels . Compared to other hosts, cucurbit­[ n ]­urils (CB­[ n ], n = 5–8, 10) show higher binding affinity and specific selectivity to guests due to its rigid hydrophobic cavity and two identical carbonyl portals. − Especially, with the larger cavity size, CB[8] can simultaneously accommodate two guest molecules to form 1:2 homoternary complexes or 1:1:1 heteroternary complexes, making it a more promising building block for constructing supramolecular polymers and hydrogels. , Furthermore, CB­[ n ] has a strong particular preference for encapsulating cationic guests, which provides favorable conditions for the development of conductive supramolecular hydrogels. However, while CB­[ n ]-mediated dynamic networks endow the hydrogels with an intrinsic energy dissipation, stimulus responsiveness, and rapid self-healing ability, it remains challenging to fabricate hydrogels with multifunctional, excellent mechanical strength.…”