4results about How to "Avoid problems such as pollution" patented technology

This invention provides a semiconductor device based on encapsulated graphene nanoribbons and its fabrication method. The semiconductor device includes: a substrate, encapsulated graphene nanoribbons located thereon, and corresponding metal electrodes. The encapsulated graphene nanoribbons includes: an insulating encapsulation with atomic-level flatness, the insulating encapsulation being formed by at least two atomic layers stacked in parallel, with adjacent atomic layers bonded by van der Waals forces; at least one longitudinal section extending along the thickness direction of the insulating encapsulation; and at least one graphene nanoribbon, which breaks through the van der Waals forces of any two adjacent atomic layers exposed on the longitudinal section and embeds itself between the two atomic layers. The graphene nanoribbons used in this semiconductor device are encapsulated in an insulating encapsulation with atomic-level flatness, isolating them from the external environment, thus giving them properties close to those of intrinsic nanoribbons, resulting in high-quality, high-performance carbon-based electronic devices. Furthermore, the fabrication method is simple, low-cost, and can be mass-produced.

This application relates to a prefabricated wall panel system, including an adjustable connecting assembly and panel assemblies. The adjustable connecting assembly includes X-axis, Y-axis, and Z-axis adjusting components. The X-axis adjusting components are spaced apart along the wall. One end of each Y-axis adjusting component is connected to the X-axis adjusting component, and the other end is engaged with the Z-axis adjusting component. The Z-axis adjusting component has an adjusting bolt at its connection end with the Y-axis adjusting component, and the other end is connected to the panel assembly. Adjacent panel assemblies are interconnected via connectors. This invention achieves three-dimensional adjustment of the panel assemblies through X-axis, Y-axis, and Z-axis adjusting components, facilitating installation and adjustment, and allowing for quick replacement of individual panels during later maintenance. The interconnection of components via bolts and connectors avoids the extensive welding work in traditional construction, and the resulting problems of welding deformation, increased costs, and environmental pollution.

The invention relates to the technical field of membrane separation materials, and discloses a polyethylene hollow fiber membrane and a preparation method and application thereof.The polyethylene hollow fiber composite membrane comprises a reinforcement body and a separation layer which is combined to the outer surface of the reinforcement body and contains ethylene copolymer, and the separation layer is partially embedded into the reinforcement body to form a composite interface; the ethylene copolymer is a copolymer of ethylene and a comonomer as shown in a formula 1 and / or a formula 2; the water contact angle of the polyethylene hollow fiber composite membrane is not more than 75 degrees. The polyethylene hollow fiber composite membrane is good in hydrophilicity and hydrophilic durability, and the defects that in the prior art, when a hydrophilic modifier is adopted for direct coating or blending modification of the polyethylene hollow fiber membrane, a hydrophilic layer is prone to falling off, stability is poor, and dissolution loss is prone to occurring are effectively overcome.

The utility model provides a slide ram type double main shaft horizontal machining center, including machining center base, be provided with workstation feed mechanism and machine storehouse cover on the machining center base, the workstation feed mechanism is located machine storehouse cover inside, two corresponding slide ram mechanism and the sectional barrier are fixedly installed on the machine storehouse cover, and each slide ram mechanism is fixedly installed with main shaft box, and is provided with knife tower, tool mounting seat and tool changing arm on the main shaft box, the machine storehouse cover outside is provided with man -machine interaction page, the utility model discloses sectional barrier between two slide rams, to realize physical isolation with sectoral partition board, and the cross -region iron fillings pollution rate reduces 90% or above, can intercept tool fragment, and worm wheel and worm drive response is fast, and the partition board can be completely stored and does not disturb the operation, can also reduce the load of the scrap, and the shock column reduces the noise and protects the drive mechanism.