The present invention concerns a method for producing a hydrogel comprising the following steps in succession: a first step (i) of providing at least one powder of an anionic polymer (A) and at least one chitosan powder (B) comprising amine functions (NH.sub.2); a second step (ii) consisting in dry mixing at least the powders (A) and (B) from the first step in order to form a mixture of powders; a third step (iii) of suspending the mixture of powders obtained from the second step in an aqueous medium having a pH that can enable the anionic polymer (A) to be dissolved without dissolving the chitosan (B); a fourth step (iv) of adding an acid to the suspension obtained from the third step in order to form the hydrogel; or the third (iii) and fourth (iv) steps are replaced by a mixing fifth step (v), comprising mixing an acidified aqueous medium including at least one compound (C) comprising at least one unit of a hexose or a unit derived from a hexose, and/or at least one phosphate of said compound (C), with said mixture comprising at least the powders (A) and (B) obtained from the second step (ii).

Disclosed herein are a supercontractible thin film comprising crystalline inclusion complex domains formed from poly(pseudo)rotaxanes or polyrotaxanes, and oriented polyethylene oxide domains physically crosslinked to the crystalline inclusion complex domains, wherein the poly(pseudo)rotaxanes or polyrotaxanes are formed from -cyclodextrin and a polyethylene glycol having a number average molecular weight of from 500 to 10,000 Daltons, the polyethylene oxide has a number average molecular weight of from 200,000 to 10,000,000 Daltons, and the supercontractible thin film contracts by more than 50% of its original length upon wetting with water, a shape-adaptive supercontractile electrode and a shape-adaptive supercontractile electronic device. Also disclosed herein are methods of forming a supercontractible thin film, a freestanding film, and an electrode composite material.

Embodiments of the present disclosure pertain to a rotaxane composition that includes macrocyclic rings and polymers, where the polymers are covalently appended to one or more macrocycle-binding molecules, where each of the macrocyclic rings includes a cavity that is threaded onto the polymers, where some of the threaded macrocyclic rings are individually threaded onto two polymers to form double-threaded macrocyclic rings with a plurality of different segments, where each of the plurality of different segments includes a plurality of double-threaded macrocyclic rings, and where the plurality of different segments associate with one another to form a crystalline network. Additional embodiments of the present disclosure pertain to sensors that include such compositions, methods of manufacturing a three-dimensional structure by applying such compositions onto a surface, and methods of forming such compositions.

Cyclodextrin compositions including one or more radiation polymerizable monomers and a cyclodextrin inclusion complex, the cyclodextrin inclusion complex including a cyclodextrin compound and an olefinic inhibitor of an ethylene generation in produce, are coated onto packaging materials and cured. Treated containers and treated package inserts having the cured cyclodextrin compositions are useful in packaging of respiring plant materials.

An article that repels animals includes a synthetic resin composition. The synthetic resin composition includes a first thermoplastic polymer. A master blend is combined with the first thermoplastic polymer. The master blend includes a second thermoplastic polymer. At least one odorant compound is selected from the group consisting of a salicylic acid ester, menthol, corn mint oil, eucalyptus oil, camphor oil, and combinations thereof. At least one scent extender compound includes at least one cyclodextrin compound, wherein a ratio by weight of the second thermoplastic polymer to a combination of the odorant compound and the scent extender compound is about 2:1. A method for forming a master blend, a method for forming a synthetic resin composition, and an article that repels animals including a synthetic resin composition are also described.

A method for preparing a sustained-release antibacterial film includes: (1) mixing a cyclodextrin metal-organic framework (CD-MOF) material with a silver nitrate short-chain alcohol solution to prepare an intermediate material A; (2) mixing the intermediate material A with a caffeic acid short-chain alcohol solution to prepare an intermediate material B; (3) dispersing the intermediate material B in a solvent, adding a polydimethylsiloxane main agent and a PDMS auxiliary agent in sequence, and mixing well by stirring to obtain a casting solution; and (4) coating the casting solution on a film support material, conducting vacuum drying, and peeling off a film from the film support material to obtain the sustained-release antibacterial film. A mixed matrix-based film material in which the CD-MOF and the PDMS are physically blended is prepared based on CD-MOF and PDMS for the first time, and may be used in application researches of food, environment and other fields.

The invention provides a host-guest supramolecular hydrogel. The hydrogel contains an AAm/NVP interpenetrating polymer network (IPN) with supramolecular cross-linkers assembled from -lactam/adamantane-containing guest molecule with host polymeric cyclodextrin (PCD). An advantage of this hydrogel is that because of the molecular association of polymeric cyclodextrin and adamantane, the supramolecular hydrogels self-heal without any external stimuli after the hydrogels are severed. The invention also provides methods of making the hydrogel, methods of making the synthesis intermediates, and methods of diagnosis or treatment of -lactamase-containing bacteria.

The present disclosure provides a water-soluble 1,3-diphenylguanidine (DPG)-based supramolecular inclusion complex and a preparation method and use thereof. A supramolecular compound and a vulcanization accelerator DPG are subjected to supramolecular interaction to form a DPG-based supramolecular inclusion complex. While improving water solubility and dispersibility of the DPG, a molecular structure of the DPG can be completely retained, and the supramolecular host used does not affect a performance of latex. The supramolecular compound and the DPG are ball milled in a certain proportion to prepare the DPG-based supramolecular inclusion complex, the water-soluble DPG-based supramolecular inclusion complex is added in a natural latex curing process; and after mixing evenly, a mixture is foamed on-machine, vulcanized in a steamer, and dried to obtain a latex foam product. The latex product has significantly improved tensile strength and elongation at break, and reduced hardness, which is more healthy and hygienic, showing broad market prospects.

The invention provides a host-guest supramolecular hydrogel. The hydrogel contains an AAm/NVP interpenetrating polymer network (IPN) with supramolecular cross-linkers assembled from -lactam/adamantane-containing guest molecule with host polymeric cyclodextrin (PCD). An advantage of this hydrogel is that because of the molecular association of polymeric cyclodextrin and adamantane, the supramolecular hydrogels self-heal without any external stimuli after the hydrogels are severed. The invention also provides methods of making the hydrogel, methods of making the synthesis intermediates, and methods of diagnosis or treatment of -lactamase-containing bacteria.