A nucleophilic substitution reaction to crosslink cyclodextrin (CD) polymer with rigid aromatic groups, providing a high surface area, mesoporous CD-containing polymers (P-CDPs). The P-CDPs can be used for removing organic contaminants from water. By encapsulating pollutants to form well-defined host-guest complexes with complementary selectivities to activated carbon (AC) sorbents. The P-CDPs can rapidly sequester pharmaceuticals, pesticides, and other organic micropollutants, achieving equilibrium binding capacity in seconds with adsorption rate constants 15-200 times greater than ACs and nonporous CD sorbents. The CD polymer can be regenerated several times, through a room temperature washing procedure, with no loss in performance.

The invention provides a particle containing cellulose or a cellulose derivative as a main component, and having a wrinkle-like or fold-like uneven structure on a surface, and a method for producing the same. Such a particle is soft and excellent in light scattering properties, so that it is useful as cosmetics.

The invention provides a particle containing cellulose or a cellulose derivative as a main component, and having a wrinkle-like or fold-like uneven structure on a surface, and a method for producing the same. Such a particle is soft and excellent in light scattering properties, so that it is useful as cosmetics.

The present disclosure provides an aerogel comprising conductive polymers and cellulose nanofibrils (CNF). The present disclosure also provides a sensor comprising the aerogels of the present invention.

The invention provides a mild procedure for the functionalization of cellulose and other substrates with a detection reagent such as N-(1-naphthyl)ethylenediamine and is able to achieve much higher functionalization density than previously reported. A paper-based device created using cellulose functionalized according to the invention allowed for much lower detection limits for nitrite in various kinds of water samples than have been seen using paper-based devices. In addition, grafting of N-(1-naphthyl)ethylenediamine to cellulose improved the stability of the N-(1-naphthyl)ethylenediamine in the presence of moisture and light.

The invention provides a mild procedure for the functionalization of cellulose and other substrates with a detection reagent such as N-(1-naphthyl)ethylenediamine and is able to achieve much higher functionalization density than previously reported. A paper-based device created using cellulose functionalized according to the invention allowed for much lower detection limits for nitrite in various kinds of water samples than have been seen using paper-based devices. In addition, grafting of N-(1-naphthyl)ethylenediamine to cellulose improved the stability of the N-(1-naphthyl)ethylenediamine in the presence of moisture and light.

A method for preparing a cellulose sponge, comprising: (A) providing a solution of hydroxypropyl cellulose having a self-crosslinkable substituent; and (B) adding an initiator and a catalyst into the solution of hydroxypropyl cellulose having the self-crosslinkable substituent for crosslinking, wherein a method for preparing the hydroxypropyl cellulose having the self-crosslinkable substituent comprises: (a) dissolving hydroxypropyl cellulose in dimethylformamide to form a hydroxypropyl cellulose solution; (b) dissolving a compound comprising the self-crosslinkable substituent in dimethylformamide and slowly adding it drop by drop into the hydroxypropyl cellulose solution; (c) adding an alcohol for reaction; and (d) reacting and drying at room temperature to form the hydroxypropyl cellulose having the self-crosslinkable substituent.

The present invention provides a method of producing a polymer hydrogel comprising the steps of: (1) preparing an aqueous solution of a water soluble polysaccharide derivative and a polycarboxylic acid; (2) optionally agitating the solution, for example, by stirring; (3) isolating a polysaccharide derivative/polycarboxylic acid composite from the solution; and (4) heating the polysaccharide derivative/polycarboxylic acid composite at a temperature of at least about 80 C., thereby cross-linking the polysaccharide with the polycarboxylic acid. The invention also provides polymer hydrogels produced by the methods of the invention.

The invention relates to plant-derived cellulose-containing particles useful as rheology modifiers and to a process for preparing cellulose-containing particles from plant material, which process involves treating said plant material with a peroxide reagent. The process can be controlled to produce cellulose-containing particle having a viscosity up to about 7500 or 8000 cps.

The invention relates to plant-derived cellulose-containing particles useful as rheology modifiers and to a process for preparing cellulose-containing particles from plant material, which process involves treating said plant material with a peroxide reagent. The process can be controlled to produce cellulose-containing particle having a viscosity up to about 7500 or 8000 cps.