6results about How to "Density controllable" patented technology

The invention belongs to the field of wastewater treatment. The invention provides a manganese-carbon composite controlled-release material as well as a preparation method and application thereof. The manganese-carbon composite controlled-release material comprises the following components: a manganese-rich mineral, a natural plant carbon source, a cementing material, aggregate, an additive and a foaming agent. The manganese-carbon composite controlled-release material disclosed by the invention can regulate and control the carbon release and manganese circulation process by virtue of the interaction between manganese and carbon, so that the electron transfer and mass transfer efficiency is remarkably improved, synergistic denitrification is realized, the overall denitrification efficiency is remarkably improved, and synchronous nitrogen and phosphorus removal and self-adaptive continuous denitrification are realized. The raw materials required for preparing the manganese-carbon composite controlled-release material are environment-friendly and low in price, the preparation process is simple, the preparation cost is low, and the manganese-carbon composite controlled-release material can be applied to filler in a submerged area of an artificial wetland, a biological filter and a biological retention system, and can be widely applied to application scenes such as tail water advanced treatment of a sewage treatment plant, rural agricultural sewage treatment and initial rainwater purification.

The present invention relates to the field of polypropylene, and discloses a long-chain branched polypropylene and a preparation method thereof. The long-chain branched polypropylene resin has a structure shown in the following formula (I), and the molar percentage of Si atoms in the long-chain branched polypropylene resin is 0.0001‰-1.25‰, wherein k is an integer of 0-18, m is an integer of 250-25000, n is between 1-5, x is an integer greater than 1, and R is a linear, branched or isomerized alkyl group having a carbon number of 1-20. The long-chain branched polypropylene resin of the present invention has the effects of high comonomer insertion efficiency, clear polymer structure, and uniform distribution of long-chain branched structures in the polymer chain.

The invention discloses a lightweight furnace door brick and a preparation method thereof, the lightweight furnace door brick comprises the following components by weight: 27.4%-35.8% of alumina, 11.3%-17.1% of flint clay, 11.3%-17.1% of cordierite, 8% of alumina micro powder, 5% of silica fume, 7% of calcium aluminate cement, and 10-30% of lightweight aggregate. The lightweight aggregate is matched with the furnace door brick, the material, chemical components and density of the lightweight aggregate are controllable, and the lightweight aggregate can be correspondingly adjusted according to the use condition. Under the composite action of the lightweight aggregate and the air entraining agent, the overall weight and the heat conductivity coefficient of the furnace door brick are reduced, the use cost of refractory materials is reduced, and heat loss is reduced.

The invention provides a nanotube array preparation method, a nanotube array and a device, and the method comprises the steps: preparing a double-layer two-dimensional material with a lattice-oriented relative included angle on a substrate, and taking the double-layer two-dimensional material as a template; the method comprises the following steps: determining chiral parameters of a to-be-prepared nanotube corresponding to a relative included angle of lattice orientation of a double-layer two-dimensional material, determining nanobelt orientation and nanobelt width based on the determined chiral parameters, and determining a distance between nanobelts based on the density of the to-be-prepared nanotube and the nanobelt width, etching the double-layer two-dimensional material based on the determined nanobelt orientation, nanobelt width and spacing between nanobelts to obtain a nanobelt array of the double-layer two-dimensional material; and performing thermal excitation treatment on the obtained nanotube array of the double-layer two-dimensional material to obtain the nanotube array. According to the invention, the nanotube array with controllable density, orientation and chirality can be prepared.

The invention relates to a tungsten sol modified AlMgB14-TiB2 composite ceramic and a preparation method of the tungsten sol modified AlMgB14-TiB2 composite ceramic. The preparation method of the tungsten sol modified AlMgB14-TiB2 composite ceramic comprises the following steps: mixing AlMgB14 raw material powder and TiB2 raw material powder, adding the mixture into tungsten sol, carrying out dipping coating modification, carrying out ultrasonic treatment, filtering, drying, carrying out a reduction reaction, and finally carrying out molding and high-temperature sintering on the powder after the reduction reaction to obtain the tungsten sol modified AlMgB14-TiB2 composite ceramic.

The application provides a preparation method of nanocellulose-based composite thermal insulation material and application thereof. The method first prepares a GO-NC-Ce hybrid dispersion liquid through ultrasonic-assisted self-assembly; then, a flexible polymer is used as a matrix, carbon nanotubes, pre-dispersed aerogel particles, phase change microcapsules, a phase change energy storage framework and a composite foaming system are added, and a multifunctional composite slurry is prepared through high-speed shearing and vacuum degassing; subsequently, a gradient ice crystal template is formed through a freeze-drying technology by controlling a freezing rate, and a foaming body with a gradient pore structure of a bottom layer, a main body layer and a surface layer is obtained after sublimation of the ice crystal; finally, a surface layer slurry containing sepiolite fibers, nanometer titanium dioxide and a hydrophobic agent is sprayed on the surface of the foaming body and solidified to obtain the composite thermal insulation material. The obtained material has controllable porosity and excellent heat insulation performance, and is suitable for the field of wearable textile thermal insulation.