Methods and systems of the present invention use mixed textile feedstock, which may include post-consumer waste garments, scrap fabric and/or other textile materials as a raw feed material to produce isolated cellulose and other isolated molecules having desirable properties that can be used and be used in the textile and apparel industries, and in other industries. A multi-stage process is provided, in which mixed textile feed material is subjected to one or more pretreatment stages, followed by at least two pulping treatments for isolating cellulose molecules and other molecular constituents, such as polyester. The isolated cellulose and polyester molecules may be used in a variety of downstream applications. In one application, isolated cellulose and polyester molecules are extruded to provide regenerated cellulose fibers and regenerated polyester fibers having desirable (and selectable) properties that are usable in various industrial applications, including textile production.

The invention relates to a method for depositing nano-objects on the surface of a gel comprising the steps of: a) providing a gel having a polymer matrix and a solvent within the polymer matrix, the polymer matrix forming a three-dimensional network which is capable of swelling in the presence of the solvent, wherein the solubility of the polymer matrix in the solvent at 1 bar and 25 C. is less than 1 g/l, wherein the gel has a rigidity gradient on the micrometer scale of less than 10%, then b) depositing nano-objects on the surface of the gel, the nano-objects having a mean diameter greater than or equal to the mean diameter of the pores of the gel, then c) evaporating the solvent from the gel at least until the content of solvent no longer varies over time, under the proviso that, at the start of evaporation, the content of mineral salts in the solvent is less than 6 g/l, the gel capable of being obtained and the uses thereof.

The invention concerns a method for depositing nano-objects on the surface of a gel comprising a polymer matrix having at least two contiguous zones of distinct rigidities, said method comprising the steps of: a) providing a gel comprising a polymer matrix and a solvent within the polymer matrix, the polymer matrix forming a three-dimensional array capable of swelling in the presence of said solvent, wherein the solubility of the polymer matrix, at 1 bar and 25 C., in the solvent is less than 1 g/L, the polymer matrix comprising at least two contiguous zones of distinct rigidities having a rigidity gradient greater than or equal to 0.1 kPa/m, then b) depositing nano-objects on the surface of the gel, then c) evaporating the solvent from the gel at least until the variation of the rate of evaporation of the solvent from the at least one least rigid zone of the gel is not constant over time, by which the nano-objects migrate towards the at least one most rigid zone of the gel and a gel is obtained for which the surface is at least partially coated with nano-objects, and wherein the density per unit area of nano-objects of the at least one most-rigid zone among the at least two contiguous zones is greater than that of the at least one least-rigid zone among the at least two contiguous zones, the gel that can be obtained and its applications.

Disclosed is a method for preparing a bilayer scaffold through single process comprising: preparing a first polymer aqueous solution; adding a second polymer into the first polymer aqueous solution and stirring a reactant; adding a surfactant into the stirred reactant and stirring the reactant at high temperature and high speed; freeze-drying the stirred reactant thereby obtaining a sponge; dipping the sponge in a cross-linking agent thereby rendering be cross-linked; and freeze-drying the cross-linked reactant.

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.

This invention provides a preparation, composition, product, and application of a photo-coupled synergistically crosslinked hydrogel material. The preparation includes dissolving Component A including a photosensitive polymer derivative having o-nitrobenzyl phototriggers and Component B including a polymer derivative having amine or alkene (double group) or sulfhydryl group in a biocompatible medium to obtain solution A and solution B, respectively; mixing the solution A and solution B homogeneously to obtain a hydrogel precursor solution; initiating photo-coupled synergistic crosslinking under an irradiation of a UV light to form the hydrogel. The irradiation causes the o-nitrobenzyl phototriggers to generate an aldehyde group/keto group or a nitroso group to initiate photo-coupled synergetic crosslinking. The photo-coupled synergistically crosslinked hydrogel has applications in tissue engineering, regenerative medicine, 3D printing and as a carrier of cell, protein or drug.

A process for manufacturing a porous body, includes preparing a dispersion liquid having a dispersion medium with cellulose-based nanofibers that have an average fiber diameter from 1 to 100 nm and dispersed therein, attaching the dispersion liquid to a porous support having a plurality of pores that connect with one another, removing the dispersion liquid attached to a surface of the porous support excluding an inside of pores of the porous support, and subsequently drying the porous support including the dispersion liquid in the pores of the porous support to remove the dispersion medium.

The present invention relates to the use of an amine compound comprising at least one, preferably at least two amine functions, wherein the amine functions are primary or secondary amines, to reduce the level of furfural and/or hydroxymethylfurfural in a carbohydrate-based binder or binder composition and/or escaping in the course of preparation, cross-linking and/or curing of carbohydrate-based binders. Preferably, the carbohydrate-based binder is obtained from a carbohydrate-based binder composition comprising a carbohydrate component and a cross-linker and possibly reaction product of carbohydrate component and cross-linker, wherein the cross-linker is selected from ammonium salts of inorganic acid, carboxylic acids, salts, ester or anhydride derivatives thereof, and/or combinations thereof.

The present invention relates to a method for manufacturing a film having an oxygen transmission rate in the range of from 1 cc/m.sup.2/24 h to 500 cc/m.sup.2/24 h according to ASTM D-3985, at a relative humidity of more than 50% at 25 C., or higher than 75% at 25 C., or higher than 85% at 25 C., wherein the method comprises the steps of: providing a first suspension comprising a microfibrillated cellulose, wherein the dry content of the suspension is in the range of from 0.1 to 10% by weight, adding a wet strength additive to said first suspension, at an amount of from 0.1 to 10 weight-% based on the amount of microfibrillated cellulose (dry/dry), thereby forming a mixture of the microfibrillated cellulose and the wet strength additive, applying said mixture to a substrate to form a fibrous web and drying said web to form said film. The present invention also relates to a film produced according to the method.

Provided is a rubber composition that can improve the on-ice performance of a rubber article such as a tire while maintaining the wear resistance of the rubber article at a good level. The rubber composition contains a rubber component and fibrous or flat particles, where the particles form a plurality of aggregates in the rubber composition, and a proportion of aggregate having an aggregation diameter of 10 m or more and 1000 m or less is 70% or more among the plurality of aggregates.