This document relates to non-aqueous compositions including a maleic anhydride copolymer and a polyamine or polyaziridine crosslinker. The maleic anhydride copolymer includes repeat units I and II: ##STR00001##
Each R.sup.1 is independently H, (C.sub.1-C.sub.5)alkyl, CO(O)(C.sub.1-C.sub.5)alkyl, or aryl; and each R.sup.2 is independently H, (C.sub.1-C.sub.5)alkyl, CO(O)(C.sub.1-C.sub.5)alkyl, and aryl.

The present disclosure is directed an ion exchange membrane that has an increased affinity for a specific ionic species. The ion exchange membranes disclosed herein include ionophores that can increase ion-selectivity. These ion exchange membranes can be incorporated to various ion-exchange systems or devices that can selectively separate ions of value.

A water-resistant gas barrier film is provided with a gas barrier layer at least disposed on a substrate film. The gas barrier layer is made from coating liquid comprising (a) at least one of carboxy group-modified polyvinyl alcohol and partially saponified polyvinyl alcohol, (b) completely saponified polyvinyl alcohol, and (c) polyethyleneimine.

A glucose electrochemical sensor based on a hydrogel of a cationic redox polymer containing a transition metal complex medium, and a preparation method thereof. A sensing layer of the glucose electrochemical sensor comprises a cationic redox polymer containing a transition metal complex medium, glucose oxidase, and a crosslinking agent. The glucose electrochemical sensor can specifically measure glucose, and the linear correlation coefficient between a stable current signal of the glucose electrochemical sensor and the glucose concentration is high. The influence of interfering substances on glucose measurement can be eliminated, and the influence of oxygen concentration in a solution on glucose measurement can also be eliminated.

A graded-index optical element may include a nanovoided material including a first surface and a second surface opposite the first surface. The nanovoided material may be transparent between the first surface and the second surface. Additionally, the nanovoided material may have a predefined change in effective refractive index in at least one axis due to a change in at least one of nanovoid size or nanovoid distribution along the at least one axis. Various other elements, devices, systems, materials, and methods are also disclosed.

A composition comprises a polyol, a polyethylenimine compound, and a sulfite compound. A method for producing a polyurethane polymer comprises the steps of: (a) providing a polyol; (b) providing an additive composition comprising a polyethylenimine compound and a sulfite compound; (c) combining the polyol and the additive composition to produce a polyol composition; (d) providing an isocyanate compound; and (e) combining and reacting the polyol composition and the isocyanate composition to produce a polyurethane polymer.

Disclosed are a liquid colored oil and a colored polyamide fiber. The liquid colored oil contains a colorant and a base oil agent. The base oil agent is a liquid at normal temperature and normal pressure, and a solubility parameter (SP) value thereof is 7.5 to 15.0. The colored polyamide fiber contains the aforementioned liquid colored oil. The liquid color oil can be stably added into polymers and dye them during the spinning process. The colored polyamide fiber has excellent spinning and dyeing properties.

Biocompatible phase invertible proteinaceous compositions and methods for making and using the same are provided. The subject phase invertible compositions are prepared by combining a crosslinker and a proteinaceous substrate. The proteinaceous substrate includes one or more proteins and a polyamine, where the polyamine and a proteinaceous substrate are present in synergistic viscosity enhancing amounts, and may also include one or more of: a carbohydrate, a tackifying agent, a plasticizer, or other modification agent. In certain embodiments, the crosslinker is a heat-treated dialdehyde, e.g., heat-treated glutaraldehyde. Also provided are kits for use in preparing the subject compositions. The subject compositions, kits and systems find use in a variety of different applications.

There is provided a method of forming a metallized polymeric film comprising (1) coating a polymer film with an aqueous primer solution comprising a solution of at least one polyanion and at least one polyethyleneimine, wherein the polyanion is a polymer comprising at least partially neutralized acid groups having a weight average molecular weight of preferably at least 5000 g/mol prior to neutralization; and wherein said polyethyleneimine has a weight average molecular weight of preferably at least 25000 g/mol; and (2) depositing a metal or a metal oxide on the at least one coated side of the polymer film.

This invention disclosed a resin-based composite material has a three-layer structure and the application thereof. According to the invention, an oriented carbon nanotube bundle/epoxy resin composite material (denoted as layer B) is prepared with the microwave curing method, a barium titanate nanofiber/epoxy resin composite material (denoted as layer E) is prepared by means of a blade coating-heat curing method, and a composite material of a B-E-B three layer structural is formed by means of a layer-by-layer curing technology. Compared to the composite material of the conductor-insulating layer/polymer layer structural prepared in the prior art, the resin-based composite material has a three-layer structure provided by the invention has with high energy storage density, and low dielectric loss and high permittivity; and the preparation process therefor is controllable and easy to operate, short in production cycle, and suitable for large-scale application.