2results about How to "Good self-supporting performance" patented technology

The embodiment of the invention relates to a continuous production system and a continuous preparation method of a carbon nanotube film, and belongs to the technical field of carbon nanotube film preparation. The continuous production system comprises a grinding and pulping system, a pulp distribution system, a vacuum forming system, a top net transfer system, a drying system and a winding device. The grinding and pulping system is used for preparing carbon nanotube slurry; the pulp distribution system is connected with the grinding and pulping system, is positioned above the vacuum forming system, is connected with the vacuum forming system, and is used for spreading the carbon nanotube pulp on the vacuum forming system; the vacuum forming system is used for filtering moisture in the carbon nanotube slurry to obtain a carbon nanotube wet film; the top net transfer system is arranged between the vacuum forming system and the drying system and is used for transferring the carbon nanotube wet film from the vacuum forming system to the drying system through a suction effect; the drying system is used for drying the carbon nanotube wet film to obtain a carbon nanotube film; and the winding device is connected with the drying system and is used for winding the dried carbon nanotube film.

The application provides a kind of anti-freezing high-performance concrete for building 3D printing and a preparation method thereof, the concrete contains cement 80-100 parts by mass, fly ash 80-100 parts, slag powder 220-270 parts, silica fume 15-30 parts, fine aggregate 1200-1500 parts, and polycarboxylic acid high-performance water reducing agent, thickening agent, polypropylene fiber and / or modified cellulose ether, water-binder ratio 0.55~0.67, fine aggregate is natural sand, granite waste sand or mixture thereof, replacement rate 0%~100%. During preparation, accurate measurement, dry mixing, solution preparation, wet mixing fluidization, high-speed slurry, printing forming and moisture curing are carried out. The application adopts microstructure self-optimization active anti-freezing design, without coarse aggregate, which greatly reduces carbon emission, the anti-freezing grade of concrete reaches F125-F150, with excellent printability and mechanical properties, without printing head blockage problem, the preparation process is controllable, and is suitable for building 3D printing engineering in cold and seasonal freeze-thaw areas.