Provided is a method of preparing a superabsorbent polymer. More particularly, provided is a method of preparing a superabsorbent polymer, the method capable of preparing the superabsorbent polymer maintaining excellent basic absorption performances such as centrifugal retention capacity, absorbency under load, etc. while also exhibiting an improved absorption rate.

The present invention relates to a chitosan-titanium composite, a preparation method and use thereof, and more particularly, a chitosan-titanium composite capable of effectively adsorbing and desorbing .sup.68Ge/.sup.68Ga by combining small molecular chitosan with titanium metal oxide to increase adsorption reactivity to .sup.68Ge and .sup.68Ga desorption reactivity, and a preparation method and use thereof.

The present invention relates to a chitosan-titanium composite, a preparation method and use thereof, and more particularly, a chitosan-titanium composite capable of effectively adsorbing and desorbing .sup.68Ge/.sup.68Ga by combining small molecular chitosan with titanium metal oxide to increase adsorption reactivity to .sup.68Ge and .sup.68Ga desorption reactivity, and a preparation method and use thereof.

The invention provides novel remediants and methods for remediating all biological and synthetic fibers; and biological and synthetic membranes. The remediants comprise a chemically or biologically active or inactive material, in the form of particles which are on average less than the pore size of the selected fiber, or larger than the pore size of the selected membrane, and a polymeric elution supporter suspension which is interactive with an environmentally acceptable solvent. The elution support suspension mixture is capable of maintaining the particles in a persistent suspension which can permeate through the interwoven fiber layers and pores; or brush membrane surfaces and pores, due to it small or large size, thereby delivering the remediant to the desired fiber and membrane locations.

The invention provides novel remediants and methods for remediating all biological and synthetic fibers; and biological and synthetic membranes. The remediants comprise a chemically or biologically active or inactive material, in the form of particles which are on average less than the pore size of the selected fiber, or larger than the pore size of the selected membrane, and a polymeric elution supporter suspension which is interactive with an environmentally acceptable solvent. The elution support suspension mixture is capable of maintaining the particles in a persistent suspension which can permeate through the interwoven fiber layers and pores; or brush membrane surfaces and pores, due to it small or large size, thereby delivering the remediant to the desired fiber and membrane locations.

Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa.Math.sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.

Grafted, crosslinked cellulosic materials include cellulose fibers and polymer chains composed of at least one monoethylenically unsaturated acid group-containing monomer (such as acrylic acid) grafted thereto, in which one or more of said cellulose fibers and said polymer chains are crosslinked (such as by intra-fiber chain-to-chain crosslinks). Some of such materials are characterized by a wet bulk of about 10.0-17.0 cm3/g, an IPRP value of about 1000 to 7700 cm2/MPa.Math.sec, and/or a MAP value of about 7.0 to 38 cm H2O. Methods for producing such materials may include grafting polymer chains from a cellulosic substrate, followed by treating the grafted material with a crosslinking agent adapted to effect crosslinking of one or more of the cellulosic substrate or the polymer chains. Example crosslinking mechanisms include esterfication reactions, ionic reactions, and radical reactions, and example crosslinking agents include pentaerythritol, homopolymers of the graft species monomer, and hyperbranched polymers.

The present disclosure features a Janus composite having a hydrophobic nanoparticulate component and a 2- or 3-dimensional hydrophilic framework, and materials, systems, methods of making the Janus composite and methods of using the Janus composite for separating oil from an oil-in-water emulsion. For example, Janus composites with MoS2 nanospheres on/in a hydrophilic reduced graphene oxide (rGO) or cellulose acetate framework are provided.

The present disclosure features a Janus composite having a hydrophobic nanoparticulate component and a 2- or 3-dimensional hydrophilic framework, and materials, systems, methods of making the Janus composite and methods of using the Janus composite for separating oil from an oil-in-water emulsion. For example, Janus composites with MoS2 nanospheres on/in a hydrophilic reduced graphene oxide (rGO) or cellulose acetate framework are provided.

A method of using a pelletized composition for liquid solidification and moisture retention includes the steps of: Providing a pelletized absorption material having i) at least 60% by weight agricultural fibers; and ii) 0.1-20% by weight superabsorbent polymer, wherein the pellets are substantially uniform and have a density of less than 40 LBS/Cubic Foot; and Blending the pelletized absorption material with one of i) Sludge, ii) Landfill leachate; iii) material used in hydroseeding; iv) grass seeds, fertilizer, and/or mulch to form a soil amendment; v) settling pond; and vi) wastewater streams.