2results about How to "Suitable for various occasions" patented technology

This invention relates to a bamboo-like silica / polyimide core-shell nanofiber aerogel and its preparation method. The aerogel uses bamboo-like silica as the core and polyimide as the shell. Core-shell nanofibers are obtained through coaxial electrospinning, followed by gelation, freeze-drying, and thermal imidization to form a three-dimensional porous network structure with interwoven support and cross-linking. The bamboo-like silica acts as a supporting and reinforcing skeleton within the fibers, improving the aerogel's compression resilience and structural stability, while also enhancing its flame-retardant and thermal insulation properties. The preparation method includes the preparation of a polyamic acid precursor solution, acidic hydrolysis of the silica precursor solution, coaxial electrospinning to form core-shell fibers, pre-imidization, and subsequent thermal imidization steps. The resulting aerogel exhibits low density, high porosity, low thermal conductivity, and excellent thermal stability, making it suitable for applications in thermal insulation, flame retardant protection, and lightweight structural materials.

The utility model relates to a road construction warning device, and belongs to the technical field of municipal engineering, the road construction warning device comprises an electric lifting base and a warning table mounted on the electric lifting base, a first storage battery pack, an LED display screen and a plurality of placing tables used for placing traffic cones are fixed on the warning table, the first storage battery pack is used for supplying power to the LED display screen, and the LED display screen is used for displaying the traffic cones. The placing table is arranged in a frustum shape, the warning table is further provided with a storage groove, a plurality of pressing blocks are placed in the storage groove in a matched mode, and the pressing blocks can be placed on traffic cones in a sleeving mode. By arranging the electric lifting base, manual carrying can be reduced, and the labor intensity is reduced; meanwhile, the lifting platform can enable the warning platform to suspend at different heights, so that the warning platform can be suitable for being used in different places, and a good warning effect can be achieved; and through the arrangement of the placing table, a plurality of traffic cones can be stacked, and the pressing block is pressed on the traffic cone on the uppermost layer, so that the traffic cones can be fixed and prevented from falling off from the placing table.