Synthesis, fabrication, and application of nanocomposite polymers in different form (as membrane/filter coatings, as beads, or as porous sponges) for the removal of microorganisms, heavy metals, organic, and inorganic chemicals from different contaminated water sources.

A polymer composition for use in the removal and recovery of oil slicks or spills floating on the surfaces of bodies or water or present on land, such as beaches comprising a foam of a blend of polyethylene and an ethylene-alkyl acrylate copolymer and a process for using such foams in the selective removal of oil from fresh water or salt water and the recovery of the absorbed oils from the foams is disclosed. The polymer composition is also for use in other applications in which absorption of liquids is desired.

The present disclosure is directed to methods and systems of purifying solvents. The purified solvents can be used for cleaning a semiconductor substrate in a multistep semiconductor manufacturing process.

The present invention provides a separation material comprising porous polymer particles that comprise a styrene-based monomer as a monomer unit; and a coating layer that comprises a macromolecule having hydroxyl groups and covers at least a portion of the surface of the porous polymer particles, wherein the rupture strength is 10 mN or higher.

Compositions and methods for extracting tracers from subterranean fluids are provided. The compositions include a media for solid phase extraction. The media includes a homogenous mixture of a first and second sorbent. The first sorbent includes a crosslinked polystyrene divinyl benzene copolymer core functionalized with hydroxylated polystyrene divinyl benzene copolymer. The second sorbent includes a crosslinked polystyrene divinyl benzene core functionalized with a copolymer that includes secondary and tertiary amino groups. A solid phase extraction cartridge including a homogenous mixture of the first and second sorbent is also provided. Methods of extracting tracers from subterranean fluids include extracting the tracers with a solid phase extraction column that includes a homogenous mixture of the first and second sorbent.

A hydrocarbon removal apparatus includes a plurality of fibers and a backing substrate. Each of the plurality of fibers includes a proximal end and a distal end. Each proximal end is secured to the backing substrate.

The present disclosure provides a preparation method of a porous hydrogel adsorbent based on Radix Astragali residues, including the following steps: subjecting residues of Chinese herbal medicine Radix Astragali as a precursor to bleaching with NaClO.sub.2, alkaline washing with KOH, and high power ultrasonic treatment, thereby obtaining a precursor solution of uniformly dispersed cellulose nanofibers (CNFs); adding the precursor solution of CNFs to a mixed solution of N,N′-methylene bisacrylamide (MBA), acrylic acid (AA) and ammonium persulfate (APS), shaking evenly, and initiating a polymerization reaction at a predetermined temperature to form a monolithic gel; and cleaning the monolithic gel, putting the cleaned monolithic gel into a dimethyl sulfoxide (DMSO) solution containing epichlorohydrin to allow reaction, and transferring the product of the reaction to an aqueous sodium hydroxide solution containing triethylene tetramine to allow reaction, thereby finally obtaining an amino-functionalized porous hydrogel adsorbent.

The present invention provides for an absorbent article that includes a topsheet, backsheet and absorbent core. The absorbent core includes a fibrous material and a particulate superabsorbent polymer composition. The superabsorbent polymer composition exhibits advantageous performance of absorption rate, surface tension, bulk density, centrifuge retention capacity, absorbency under load, gel bed permeability and particle size.

A chromatography medium includes a porous matrix and nonporous globules bound on the inner and outer surfaces of the porous matrix. The average radius of the microglobules is not more than 30% of the average pore diameter of the porous matrix. The chromatography medium can be used in affinity chromatography. A method for preparing the chromatography medium may include providing a porous starting matrix, providing a polymerization solution, and initiating polymerization of the polymerization solution in the presence of the porous starting matrix to form insoluble nonporous microglobules that are bound to the inner and outer surfaces of the porous starting matrix.

An absorbent article (1) comprising a top sheet (2), a back sheet (3) and an absorbent body (11) provided therebetween, wherein; the absorbent body (11) has a high-rigidity part (12) and a low-rigidity part (13); the high-rigidity part (12) and the low-rigidity part (13) extend in the front-rear direction, respectively, and are arranged alternately in the width direction; an anti-slipping member (7) is provided on a non-skin facing side of the back sheet (3); and the anti-slipping member (7) is provided so as to astride a first high-rigidity side part (12A) closest to one end in the width direction of the absorbent body (11) and a second high-rigidity side part (12B) closest to the other end in the width direction of the absorbent body (11), and not to extend outward in the width direction from the first high-rigidity side part (12A) and the second high-rigidity side part (12B).