48 results about "Azo polymer" patented technology

The invention belongs to the field of polymeric nanocomposite material synthesis, and relates to preparation and application of an amino-functionalized graphene oxide / azo polymer composite waveguide material. The preparation comprises the following steps: firstly preparing azo chromophore 4-(4-nitro-alkenyl)phenyl-1,3-diamine from paranitroaniline and m-phenylenediamine, and then preparing a isocyano-terinated azobenzene prepolymer from NAPD and IPDI in the presence of T-12; afterwards ultrasonically exfoliating graphite oxide to obtain graphene oxide dispersion liquid, and reacting with quadrol under the action of 2-(7-azo benzo triazole)-N, N, N minute, N minute-tetramethyluronium hexafluorophosphate, so as to obtain amino-functionalized graphene oxide; adding the carbimide radical blocked azobenzene prepolymer into EAGO, and performing vacuum drying. A thermo-optical coefficient (dn / dT) of the prepared amino-functionalized graphene oxide / azo polymer composite waveguide material is greater than that of a common organic material and is more than 10 times that of a traditional inorganic material, and the composite waveguide material can be applied to the development of novel digital thermal optical switches with low drive efficiency and higher response speed.

The invention discloses lignin-based amphiphilic azo-polymer colloidal spheres as well as a preparation method and application thereof. The preparation method comprises the following steps of: dissolving alkali lignin in a NaOH solution with pH of 8-14, dropwise adding a hydrogen peroxide solution with the mass concentration of 25%-35% under the condition of a 85-95 DEG C water bath, after reacting for 0.5-1.5 hours, and cooling to a room temperature to obtain the alkali lignin without methoxyl; preparing diazonium salt; mixing the alkali lignin without methoxyl with the diazonium salt, adding an alkalinity conditioning agent to adjust pH to 8-14, after reacting, adding an acidity conditioning agent to adjust pH of the solution to 1-4, so that products are acidified out and precipitated, washing precipitates by deionized water, after drying, taking out, dissolving the products in an organic solvent, and adding water serving as a precipitator to obtain the lignin-based amphiphilic azo-polymer colloidal spheres. The solid content of ceramic slurry prepared from the lignin-based amphiphilic azo-polymer colloidal spheres disclosed by the invention reaches up to 70.9wt%-73.1wt%, and is far higher than that of blank slurry; and compared with a conventional dispersion agent, the lignin-based amphiphilic azo-polymer colloidal spheres have a better dispersion effect.

The invention relates to a method for manufacturing optical waveguide by using an azobenzene polymer, and belongs to the technical field of optical device manufacturing. The method comprises the following steps: firstly, cleaning an underlayer; mixing an epoxy resin prepolymer, isocyanate and N,N-Dimethylformamide so as to obtain first blended solution, then spin-coating the first blended solution on the cleaned underlayer to obtain a lower cladding; mixing the azobenzene polymer, isocyanate and N,N-Dimethylformamide so as to obtain second blended solution, then spin-coating the second blended solution on the lower cladding to obtain a sandwich layer; placing a mask on the sandwich layer, irradiating the mask with a laser so as to form the optical waveguide; and coating a curing glue on an upper cladding of the optical waveguide. The method has the advantages of simple manufacturing process, easily controlled quality and low product cost.

The invention relates to the field of optics, and provides an optical storage anti-fake element. The optical storage anti-fake element at least comprises a pattern layer, the pattern layer is provided with azo polymers, the azo polymers at least comprises one kind of azobenzene chromophore, the upper surface of the pattern layer is provided with a continuous or discontinuous concave-convex structure, and optical information which is erasable, capable of being read, written and changed, and capable of being read and identified by machines is written in the concave-convex structure. The optical storage anti-fake element has high anti-fake reliability.