3results 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.