Abstract: Lipophilic super-absorbent swelling gels have been developed that will not only absorb the oil and grease from these machine parts, but will also act as an automated sweeper due to the self-generating mechanical force of the gel. An octadecylacrylate-co-ethylene glycol dimethacrylate (ODA-co-EGDMA) tetraalkylammonium tetraphenylborate lipophilic polyelectrolyte gel (EG-18) and poly(stearylacrylate-co-ethylene glycol dimethacrylate) (SA-co-EGDMA) neutral gel (NG-18) were evaluated for swelling and oil sorption capacity. NG-18 and EG-18 gels removed particulate contaminants and absorbed oils and grease on metal and non-metal surfaces without causing abrasion. The gels are also recyclable. The cleaning ability of the gels was compared with the standard solvent cleaner trichloroethylene (TCE) following ASTM G122-96(2008) test methods and MIL-PRF-680B procedure with MIL-PRF-10924 test grease. Polymer gel cleaners exhibited analogous extent and rate of cleaning as the TCE.

Abstract: A metal-organic framework (MOF) having the function of controlling the release of guests is provided in which reversible release control is possible and release control can be rapidly performed and which is capable of accommodating the release of various guest molecules. The metal-organic framework comprises both an organic ligand having two or more functional groups (coordinating functional groups) capable of coordinating to a metal atom and metal ions that combine with the coordinating functional groups of the organic ligand, and has a structure in which one metal ion has combined with two or more of the coordinating functional groups to connect multiple molecules of the organic ligand. The metal-organic framework/Stimulus-responsive polymer composite was obtained by affixing a stimulus-responsive polymer to at least some of the surface of the metal-organic framework. The stimulus-responsive polymer may be affixed by bonding to the organic ligand.