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316results about How to "Increase absorbance" patented technology

Preparation method of industrial alkali lignin/polyvinyl alcohol cross-linked thin film

Alkali lignin is a main by-product of the papermaking industry of our country, and sever environmental pollution will be caused by direct discharge of alkali lignin. The invention discloses a preparation method of an industrial alkali lignin/polyvinyl alcohol cross-linked thin film, so as to increase utilization ratio of lignin, reduce environmental pollution and ease the resource crisis. The industrial alkali lignin/polyvinyl alcohol cross-linked thin film is prepared by following steps, industrial alkali lignin and polyvinyl alcohol (PVA) are taken as raw materials, and are crosslinked by a cross-linking agent; and then the mixture is subjected to tape casting so as to obtain the alkali lignin/polyvinyl alcohol cross-linked thin film. An optimized preparation technology is obtained based on mechanical properties. The mechanical properties of the industrial alkali lignin/polyvinyl alcohol cross-linked thin film are better than that of industrial polyvinyl alcohol films; absorption rate on ultraviolet light is about 100%; and transmittance is reduced to a certain degree. Blending compatibility of alkali lignin and PVA is excellent; the surfaces of alkali lignin and polyvinyl alcohol thin films, which are prepared by blending or crosslinking, are smooth; and phase separation is not caused. Thermal stability of the industrial alkali lignin/PVA cross-linked thin film is increased. The industrial alkali lignin/PVA cross-linked thin film can be used as an excellent ultraviolet absorption material, and it is possible to develop a novel specific packaging material or mulching film.
Owner:NORTHEAST FORESTRY UNIVERSITY +2

Display panel and preparation method thereof

The invention provides a display panel and a preparation method thereof. The display panel comprises a camera shooting area, a display area surrounding the camera shooting area, a first substrate, a first polarizer, a liquid optical adhesive layer, a cover plate and a solid optical adhesive layer. The first polaroid is arranged on one surface of the first substrate; the first polaroid is providedwith a first slotted hole corresponding to the camera shooting area; the first slotted hole is filled with the liquid optical adhesive layer; the cover plate is connected to the face, away from the first substrate, of the first polaroid in a covering mode. The solid optical adhesive layer is at least arranged between the cover plate and the first polaroid. The invention has the technical effects;according to the display panel and the preparation method thereof provided by the invention, the liquid optical adhesive is used for replacing the solid optical adhesive to fill the slotted hole of the corresponding camera shooting area, so that the phenomenon of bubbles when the slotted hole is filled with the solid optical adhesive is avoided, the laminating yield is improved, the light absorption rate of the optical adhesive at the slotted hole is improved, the light transmittance of the camera shooting area is improved, and the quality of the display panel is further improved.
Owner:WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD

Aluminum alloy non-welding and roof tile solar heat collector

The invention discloses an aluminum alloy welding-free and roofing-tile solar collector, wherein, a collecting board is integrated with a heat-exchanging container; the solar collector is a section material with a semi-circle and tubular-shaped transect, the upper part of which is cambered and the lower part of which is flat, and connected with a plurality of aluminum alloy pipes which are connected with each other in parallel; the sunny side of the solar collector is coated with a selective heat absorption coating; water pipes which are arranged at the two sides of the solar collector and connected with the pipe section material are metal water pipes that are divided into an upper part and a lower part and has a pipe section material interface; the pipe section material and the water pipe are connected firmly by bolts and sealed by a sealant, and the upper part and the lower part of the water pipe are connected firmly by the bolts and sealed by the sealant; a glass cover plate is arranged on the pipe section material and the water pipe; a thermal insulation layer is arranged below the pipe section material and the water pipe; borders enclose the solar collector into a sealed whole at the periphery and extend out of regulas in all directions on the plane of the glass cover plate; the regulas on the left and right rise upwards so that the solar collection has the function of a large insulation roofing tile. The solar collector has the advantages of high heat collection efficiency, low price and long service life, basically requiring no maintenance, and being integrated with buildings and beneficial to scale production.
Owner:范东杰
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