12results about How to "Increase internal porosity" patented technology

The invention discloses a low-carbon masonry cementing material as well as a preparation method and application thereof. The low-carbon masonry cementing material is prepared from the following raw materials in parts by weight: 95-100 parts of ceramsite waste residue powder, 1-10 parts of magnesium aluminum silicate slag and 0-4 parts of clinker, the low-carbon masonry cementing material contains a large amount of amorphous active silicon, and under the direct excitation hydration action of the magnesium aluminum silicate slag component, the hydration rate of the low-carbon masonry cementing material is promoted, so that the low-carbon masonry cementing material has the characteristics of improved early and long-term strength, strong durability, high water retention rate and small hydration heat; besides, by adding the clinker, mineral components such as CaO, SiO2 and Al2O3 can be released and promoted to be subjected to a hydration reaction, C-S-H series hydrates and ettringite are generated, and the artificial stone is coagulated and hardened into the hard artificial stone at the normal temperature like cement.

The invention discloses core-shell type solid waste-based functional granules as well as a preparation method and application thereof. The core-shell type solid waste-based functional granules comprise a core material and a shell material coating the surface of the core material, wherein the core material comprises 20-90 parts of river sludge, 1-15 parts of hydrogen peroxide, 10-50 parts of rice hull ash, 1-12 parts of sodium hydroxide and 5-40 parts of desulfurized gypsum; the shell material comprises 10-100 parts of steel slag, 5-40 parts of mineral slag, 5-30 parts of desulfurized gypsum and 2-13 parts of polyvinyl alcohol. According to the invention, comprehensive treatment and application of the river sludge and the steel slag are realized.

A construction method of a cement stabilized macadam base relates to the technical field of road and bridge construction, and comprises the following steps: preparing a macadam mixture, and controlling the maximum particle size of the macadam mixture to be 35.0-40.0 mm; and mixing and stirring the graded broken stone mixture and cement according to a designed ratio to form the cement stabilized broken stone mixture with a dense skeleton structure. And paving the cement stabilized macadam mixture on the road surface, and rolling the paving layer. The maximum particle size of the macadam mixture is controlled between 35.0 mm and 40.0 mm, so that the size of the maximum particle size is increased, the gradation of the cement stabilized macadam mixture is relatively coarse, the embedding and extruding effect among aggregates is enhanced, and the expansion deformation of the mixture can be weakened; as the gradation is too coarse, the internal porosity of coarse aggregate in the gravel mixture can be increased, so that a space can be provided for accommodating the volume expanded due to temperature stress, the stability of a base layer is improved, and the base layer is not prone to arch expansion and cracking in the service process.

The invention relates to a preparation method of a cool-taste cigarette core material and a product and application of the cool-taste cigarette core material. The preparation method comprises the following steps that tobacco leaves are dried and smashed and then mixed with slurry, enzymolysis, steam pressurization, degassing and drying are conducted, and heated cigarette sheets are obtained; the heated cigarette sheets are frozen and dried, then adsorption perfuming is conducted, then spraying perfuming is conducted, and the cool-taste type cigarette core material is obtained. In the preparation process, through application of the biological enzyme preparation, steam pressurization and freeze drying, more adsorption pore channels are opened, the adsorption amount of the essence is increased, meanwhile, the mint essence is adsorbed in a heated cigarette sheet more uniformly, and the bitter taste of the cool-taste cigarette in the smoking process is reduced. According to the perfuming method disclosed by the invention, an internal adsorption site can be occupied by volatile small molecular substances by adopting a perfuming mode of firstly adsorbing and perfuming and then spraying and perfuming, and direct application of macromolecular substances in the spraying and perfuming process is reduced, so that the bitter taste is reduced, and the cost is saved.

The invention discloses a high-strength plant cellulose-based composite paperboard and a preparation method thereof, belongs to the technical field of paperboard materials, and aims to solve the technical problem that the strength and wet strength retention rate of a plant fiber-based composite paperboard in the prior art need to be further improved. The composite plant fiber layer is composed of a plant fiber layer and interface layers arranged on the two sides of the plant fiber layer in a modifying mode. A plant fiber layer is prepared through CMC modified plant cellulose, a PEG modified inorganic reinforcing agent and a bio-based toughening agent reinforced plant fiber, a composite structure of an interface layer, a fiber layer and an interface layer is formed by arranging a double-interface layer containing lignin nano particles / carboxylated nano cellulose, and a hot-pressing curing process is combined, so that the lignin / carboxylated nano cellulose composite fiber is prepared. The strength and toughness of the plant fiber-based composite paperboard are effectively improved, and the wet strength retention rate of the material is also effectively improved.

The invention discloses a donkey-hide gelatin cubilose with high water absorption rate and a preparation method thereof, and the preparation method of the donkey-hide gelatin cubilose comprises the following steps: carrying out steaming pretreatment on cubilose, and then carrying out freeze thawing treatment; soaking the treated cubilose in water until the cubilose is fully puffed; adding water into donkey-hide gelatin, heating and dissolving to form a donkey-hide gelatin solution And then adding the soaked cubilose into the donkey-hide gelatin solution for stewing, and immediately exhausting steam and cooling after heating is completed to obtain the donkey-hide gelatin cubilose product. By introducing a pretreatment process combining steaming and freeze thawing and matching with a reasonable stewing and cooling mode, the water absorption rate of the cubilose is effectively improved under the condition that the donkey-hide gelatin is added, and the problem of insufficient water absorption of a compounded product is improved; the obtained donkey-hide gelatin cubilose has the advantages of stable structure, full puffing, uniform texture, high nutrition compound degree and the like, and is suitable for industrial production, popularization and application of food.

This invention relates to the field of sound insulation technology and discloses a foamed aluminum-gypsum composite partition wall with high sound insulation performance. It employs a five-layer symmetrical composite structure: fire-resistant gypsum board, damping sound-insulating adhesive layer, gradient-pore-sized open-cell foamed aluminum core layer, damping sound-insulating adhesive layer, and fire-resistant gypsum board. Because the foamed aluminum core layer and fire-resistant gypsum board are bonded with environmentally friendly polyurethane structural adhesive and fixed with C-shaped cold-rolled galvanized light steel keel, the interlayer bonding is ensured to be firm and the overall rigidity uniform, preventing delamination and deformation during use. The partition wall joints utilize a double-sealing process of sealant and grooves. Internal flame-retardant sealant fills the gaps to block sound bridges and smoke passages, while external U-shaped PVC grooves combined with butyl rubber sound-insulating pads achieve full enclosure, improving long-term stability. It also boasts advantages such as lightweight, high strength, convenient construction, and good durability.

The present application relates to the industrial solid waste resource utilization and artificial aggregate technical field, specifically relates to a kind of preparation method of artificial aggregate.The specific technical scheme is as follows: including the following steps: (1) the slag, fly ash, red mud are ground and sieved, after heating treatment, mixed with activator, to obtain slurry;(2) the slurry is heated to condense, then, extrusion cutting, rounding, maintenance, alkali immersion, maintenance again, to obtain artificial aggregate.The present application solves the problem of large pore of spherical particles produced by disc granulation in the prior art.

The present application relates to the field of battery technology, and provides a nickel-cobalt-manganese ternary precursor and a preparation method thereof, a positive electrode material, and a battery. The preparation method comprises: subjecting a mixed metal salt solution to a first coprecipitation reaction to prepare a nickel-cobalt-manganese ternary precursor seed; the first coprecipitation reaction comprises a first stage reaction and a second stage reaction in sequence; subjecting a mixed metal salt solution and a nickel-cobalt-manganese ternary precursor seed to a second coprecipitation reaction to prepare a nickel-cobalt-manganese ternary precursor; the second coprecipitation reaction comprises a third stage reaction and a fourth stage reaction in sequence; the fourth stage reaction is relative to the third stage reaction: the pH increases, and the flow rate of the mixed metal salt solution increases. The nickel-cobalt-manganese ternary precursor provided in the present application has good whisker consistency, secondary particle consistency, and a high internal porosity, so that the subsequently prepared positive electrode material has higher safety performance, cycle performance, and higher specific capacity.

The invention provides a preparation method of high-strength and large-size silicon dioxide aerogel, and relates to the field of aerogel material preparation, and the preparation method comprises the following steps: S1, wet gel preparation, S2, aging, S3, surface modification, and S4, drying. Wherein in the step S2, two times of aging, namely aging by using an aging solution and aging by using absolute ethyl alcohol, are performed in sequence, and in the step S3, modification is performed by using a modification solution of an ethanol solution of a modifier with the volume fraction of 8-12%. The method can effectively solve the problems that silicon dioxide aerogel is low in strength, not easy to form, non-uniform in microstructure, easy to absorb moisture and the like, so that the aerogel structure which is stable in microstructure, good in uniformity, low in heat conductivity coefficient and excellent in heat insulation and heat preservation performance is obtained.

The present invention relates to the field of waste gas treatment technology, and specifically to a magnetic composite filler and a preparation method thereof, which can be used as a biological filler in biochemical devices. The present invention is a combination of a hollow spherical outer shell and a built-in porous ball, which has the characteristics of high porosity, high specific surface area and high airflow permeability, ensuring that the airflow is fully in contact with the filler, and taking into account the smooth flow of gas channels, reducing the pressure loss in the system. At the same time, the filler is conducive to the uniform dispersion of gas in the reactor, improves the space utilization rate, increases its contact area with microorganisms on the surface of the porous filler, and strengthens the degradation effect. In addition, by magnetizing the outer shell and the porous ball, a high-density stable heteropolar magnetic field is formed, the magnetic effect of microorganisms is stimulated, the activity of metabolic enzymes is increased, the biodegradation process of organic matter is strengthened, and the purification effect of organic matter in waste gas is improved. The present invention has a wide source of raw materials, good economy and high efficiency and energy saving, and can be extended to various types of waste gas purification processes.

The invention relates to the technical field of refractory materials, in particular to a mullite amorphous material for a garbage incinerator and a production process of the mullite amorphous material. The amorphous material comprises the following components in parts by weight: 60-75 parts of light porous mullite, 10-20 parts of calcium aluminate cement, 4-10 parts of aluminum oxide fine powder, 6-12 parts of silica powder, 1-3 parts of hydroxymethyl cellulose, 2-5 parts of kaolin and 0.5-1 part of sodium hexametaphosphate. The light porous mullite is adopted as the aggregate to be matched with other auxiliary materials to prepare the amorphous material, the cured amorphous material is excellent in corrosion resistance, uniform pores exist in the amorphous material, the heat conductivity coefficient of the amorphous material can be effectively reduced, heat loss is reduced, and the energy utilization rate is increased.