Abstract: The present invention belongs to the field of alkaline polymer electrolyte membranes, and relates to a comb-shaped structure polybenzimidazole anion exchange membrane with high conductivity and preparation method thereof. In the invention, firstly, polybenzimidazole is grafted with the non-cationic side chains to the max grafting rate to synthesize the de-protonated comb-shaped polybenzimidazole material, avoiding the N—H in benzimidazole forms ionic binding with cationic functional groups, which will reduce the reactivity and mobility of cationic groups; then react de-protonated comb-shaped polybenzimidazole with quaternization reagent to attach the pendent side chain with cationic functional groups, making it easy to aggregate to form ion clusters and hydrophilic/hydrophobic microphase separation. The anion exchange membrane prepared in this invention has excellent conductivity, mechanical properties and alkaline stability.

Abstract: A method of making a three-dimensional object comprising one or more polyimide copolymers, polyimide composites or combinations thereof is provided. The method involves 3D printing a solution comprising polyamic acid (PAA), tetraethyl orthosilicate (TEOS), and a silane selected from the group consisting of aminopropyl trimethoxysilane (APTMS), aminopropyl triethoxysilane (APTES), N-[3-(trimethoxysilyl)propyl]-ethylene diamine (ETDA), and glycidoxypropyl trimethoxysilane (GPTMS) to produce a three-dimensional form, and thermosetting the three-dimensional form.

Abstract: A method of curing polyimide, polyimide copolymers, polyimide composites or combinations is provided. The method involves preparing a reaction system comprising poly(amic acid) and at least one other compound selected from the group consisting of copolymers, solvents, fillers and nanofillers. Then, a combined overall microwave absorptivity of the reaction system is determined. A temperature ramp rate is calculated for a microwave power level and time using the combined overall microwave absorptivity. The reaction system is then exposed to microwave radiation according to the calculated temperature ramp rate, producing a cured product.

Abstract: A display substrate includes a backplane, first light-emitting devices capable of emitting first color light, second light-emitting devices capable of emitting second color light that are all disposed on the backplane, a low-refractive-index intercalation layer disposed at a side, away from the backplane, of the first light-emitting devices and the second light-emitting devices, and an encapsulation layer. The encapsulation layer includes a first inorganic barrier layer, a first organic barrier layer and a second inorganic barrier layer that are sequentially stacked on a side of the low-refractive-index intercalation layer away from the backplane. A refractive index of the low-refractive-index intercalation layer is less than a refractive index of the first inorganic barrier layer.