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The application discloses a kind of Ni doped nano SnO2 semiconductor HCHO sensing materials and preparation method and application thereof, and the preparation method of sensing material includes the following steps: step one, Sn salt-Ni salt solution is configured;Step two, using supercritical hydrothermal synthesis (CSHS) reaction device, Sn salt-Ni salt solution is contacted with supercritical water and crystallization is generated nano doped oxide, and reaction liquid is discharged and collected after cooling, and the crystalline material is separated, i.e. the Ni doped nano SnO2 semiconductor HCHO sensing material of the application.The Ni doped nano SnO2 semiconductor HCHO sensing material prepared by the method of the application has good structural consistency and excellent sensing performance.

The invention discloses a nanometer eutectic precipitate reinforced nickel-based alloy coating and a preparation method of the nanometer eutectic precipitate reinforced nickel-based alloy coating, and belongs to the technical field of component design and structure regulation and control of laser cladding nickel-based alloy materials. A metallurgical environment beneficial to WC dissolution and carbon activation is constructed in a laser molten pool, so that WC does not exist in a final reinforced particle form any more, but participates in an in-situ reaction as a carbon source and a tungsten source, and fine and dispersed W5 (Si, B) 3 and Mo2C nano eutectic precipitates with good interface compatibility with a nickel-based matrix are synchronously generated; and therefore, active regulation and control on the size, distribution and interface structure of the carbide are realized from the aspect of a reinforced phase forming mechanism, and the problems of weak interface bonding and non-uniform structure caused by traditional additional ceramic particles are fundamentally avoided.

The invention belongs to the technical field of composite material electric pole processing, and particularly relates to a thermal curing forming furnace of a polyurethane composite material electric pole, which comprises a furnace body, a vertical plate, a thermal curing device and a thermal curing device, the right side wall of the furnace body is fixedly connected with a controller, the upper side wall of the furnace body is hinged with a cover plate, and the front side wall and the rear side wall of the furnace body are both provided with heating assemblies; the right side of the bottom wall of the furnace body is fixedly connected. In the thermal curing process of the polyurethane composite material electric pole, automatic surface bubble elimination and automatic liquid supplementing are achieved, hysteresis quality and operation errors caused by manual bubble treatment can be avoided from the source, gas generated in curing is exhausted in real time, resin with the same proportion is accurately supplemented and injected into pits and material layer gaps after bubble elimination, and the thermal curing quality of the polyurethane composite material electric pole is improved. The quality defects of surface bubbles, material shortage, edges and the like are thoroughly overcome, the surface smoothness and the structural compactness of the electric pole are guaranteed, and procedure redundancy and secondary damage caused by manual polishing and glue supplementing are avoided.

The application provides an aerogel composite material for 3D printing and a preparation method thereof, and the preparation method comprises the following steps: S1, a base material is vacuum dried to obtain a pre-dried base material, the pre-dried base material is premixed with a foaming agent at a low speed for 5-15 min, and the pre-mixed material is sent into a double-screw extruder to be extruded and granulated to obtain granules one; S2, the granules one are frozen and crushed at a low temperature and sieved to obtain pre-foaming master batches; S3, the pre-foaming master batches, aerogel powder, white oil and a dispersing agent are added into a mixer, stirred at a low speed for 3 min, heated, stirred at a high speed for 15-20 min, and discharged to obtain powder mixtures; S4, the powder mixtures and a foaming agent two are sent into a double-screw extruder to be extruded and granulated to obtain granules two; S5, the granules two are added into an extruder to be melt-extruded to obtain a wire; and S6, the wire is cooled and wound in a constant-temperature environment at 25 DEG C, and vacuum packaged to obtain the aerogel composite material for 3D printing. The aerogel composite material prepared by the application has good heat insulation performance and can meet the personalized manufacturing requirements of complex shapes.

This invention belongs to the field of polymer material preparation and nanomaterial processing technology, specifically relating to a method for preparing polyvinyl alcohol (PVA) nanoparticles. The method for preparing PVA nanoparticles provided by this invention includes the following steps: mixing PVA powder raw material with hot water to obtain a hot aqueous solution of PVA; adding the hot aqueous solution of PVA dropwise to pretreated acetone under stirring conditions to induce precipitation and obtain a suspension; performing solid-liquid separation on the suspension, and drying the resulting solid phase to obtain the PVA nanoparticles. This preparation method uses commercially available PVA as raw material and is simple, mild, and easily repeatable.