12results about How to "Improved pore distribution" patented technology

The invention relates to the technical field of air purification, and discloses a preparation method of an aldehyde-removing antibacterial activated carbon material, which comprises the following steps: raw material preparation, acidification treatment, carbonization treatment, silver loading treatment, activation treatment, washing and drying treatment, and finished product processing. The method has the advantages that three-section heating is adopted for carbonization treatment after heating acidification treatment, pore distribution is optimized, and richer micropores, mesopores and macropores are formed. Activating treatment is carried out after silver loading, so that the porosity and the specific surface area of the activated carbon are increased, the adsorption performance of the activated carbon is improved, the physical and chemical characteristics of the activated carbon are improved, the adsorption capacity is improved, and easy saturation is avoided. The formaldehyde-removing and antibacterial effects of the activated carbon are remarkably improved and the service life of the activated carbon is prolonged in an adsorption-catalysis combined manner, and the activated material is washed, dried and processed into a finished product, so that the activated material can be practically applied according to different requirements in real scenes such as indoor scenes and the like.

The invention relates to the technical field of macromolecular polyurethane foaming materials, and mainly relates to a preparation method of environment-friendly combined polyether for a polyurethane foaming material, the environment-friendly combined polyether comprises the following components in parts by weight: 10-18 parts of starch-based low polyether and the balance of polyether polyol, and the total weight is 100 parts. The preparation method of the environment-friendly combined polyether comprises the following steps: drying treatment, pretreatment, catalyst addition, initiator polyol addition, esterification reaction, grafting reaction, viscosity adjustment and mixing. The starch-based low-polyether is prepared by taking common and cheap corn starch as a main component, and the starch-based low-polyether is mixed with polyether polyol to form the environment-friendly combined polyether for the polyurethane foaming material, so that the aims of taking the starch-derived polyether as a raw material and improving the environment friendliness of the polyurethane foaming material are fulfilled, and the production cost is low.

The present invention provides a MOR molecular sieve membrane and a preparation method thereof, wherein the preparation method of the MOR molecular sieve membrane comprises the following steps: S1, mixing an aluminum source, an alkali solution, a silicon source, a fluoride salt, an organic alcohol and water to obtain a synthetic sol; S2, coating a seed solution on the surface of a porous carrier to obtain a seed layer; S3, coating the synthetic sol on the surface of the seed layer, and performing three temperature-variable crystallizations to obtain a MOR molecular sieve membrane; in step S1, the molar ratio of SiO2, Na2O, Al2O3, ROH, NaF and H2O is 1: (0.1-0.35): (0.03-0.15): (0.2-2): (0.1-0.5): (10-100). The present invention adds an organic alcohol to improve the crystallinity and overall structural integrity of the MOR molecular sieve membrane structure.

The invention relates to the technical field of batteries, in particular to a negative electrode material preparation method based on a negative electrode aged hard carbon material, which comprises the following steps: firstly, crushing and grading an aged hard carbon precursor to obtain particles with a preset particle size; the preparation method comprises the following steps: performing pretreatment such as acid washing, alkali washing, water washing and ethanol washing, mixing a purified precursor with a coating material in proportion to form a uniform coating layer, pre-sintering in a protective atmosphere, and preliminarily stabilizing a material structure by controlling parameters such as a heating rate; and carrying out specific surface area detection on the pre-sintered primary product, and dynamically adjusting pre-sintering process parameters according to the specific surface area detection to ensure that the pore structure of the material reaches the standard. And performing high-temperature carbonization treatment on the material meeting the standard so as to repair the carbon layer structure and improve the conductivity. And finally, performing quality judgment by detecting the first coulombic efficiency of a finished product. According to the invention, the first coulombic efficiency, the specific capacity and the cycling stability of the regenerated hard carbon material are improved, and the recycling of the aging material is realized.

The invention provides an MOR molecular sieve membrane and a preparation method thereof.The preparation method of the MOR molecular sieve membrane comprises the following steps that S1, an aluminum source, alkali liquor, a silicon source, villiaumite, organic alcohol and water are mixed, and synthetic sol is obtained; s2, coating the surface of the porous carrier with a seed crystal liquid to obtain a seed crystal layer; s3, coating the synthetic sol on the surface of a seed crystal layer, and carrying out three times of variable-temperature crystallization to obtain an MOR molecular sieve membrane; in the step S1, the molar ratio of the SiO2 to the Na2O to the Al2O3 to the ROH to the NaF to the H2O is 1 to (0.1 to 0.35) to (0.03 to 0.15) to (0.2 to 2) to (0.1 to 0.5) to (10 to 100). The organic alcohol is added, so that the crystallinity of the MOR molecular sieve membrane structure and the integrity of the whole structure are improved.

The application discloses a preparation method of a self-template nitrogen-doped sugarcane residue biochar electrode material and application thereof, and the preparation comprises the following steps: placing repeatedly cleaned sugarcane residue in a tubular furnace, and performing low-temperature carbonization under a nitrogen atmosphere. Then, the product after low-temperature carbonization is uniformly mixed with potassium hydroxide with a certain mass ratio in a mortar, and then the uniformly mixed sample is placed in the tubular furnace to perform activation under a nitrogen atmosphere. Finally, the obtained activated product is neutralized with hydrochloric acid to neutralize excessive alkali, then washed with deionized water until neutral, and vacuum dried to obtain the self-template nitrogen-doped sugarcane residue biochar electrode material. In the application, cheap and easily obtained sugarcane residue is used as a raw material to prepare a tubular structure biochar for electric adsorption, and no additional template is needed. Compared with similar technologies, the electrode is more excellent in effect and lower in cost, achieves the purpose of waste treatment with waste, and is an effective technical approach to realize the double carbon.

The invention relates to the technical field of building materials, and discloses a novel high-strength lightweight building material and a production method thereof, the novel high-strength lightweight building material comprises the following components by mass: 75-100 parts of a base material; 50 to 80 parts of a binder; 10 to 30 parts of a reinforcing material; 10 to 20 parts of ceramic microbeads; 8 to 15 parts of a polymer modifier; 10 to 25 parts of filler; 2-5 parts of a water repellent; 1 to 5 parts of a retarder; and 2-8 parts of an anti-cracking agent. Through the hollow structure of the ceramic microbeads, the overall density of the material can be remarkably reduced, meanwhile, the rigid shell can provide excellent compression resistance, pore distribution of the material is effectively optimized, the material is kept light without sacrificing strength, a flexible network is formed through the polymer modifier, the toughness and crack resistance of the material can be remarkably improved, and the service life of the material is prolonged. The interface bonding force between particles is enhanced, and the compactness and the strength of the material are further improved.

This invention relates to the field of papermaking technology, specifically to a high charge density composite retention and filtration aid, its preparation method, and its application. The invention uses montmorillonite as raw material, acidifying it with sulfuric acid and then treating it with 3-mercaptopropyltrimethoxysilane to obtain modified montmorillonite; subsequently, it is mixed with acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, and 10-undecenal, and polymerized under nitrogen atmosphere using sodium persulfate as an initiator to prepare polymer-modified montmorillonite powder; using linear corn starch as raw material, it is gelatinized and reacted with 3-chloro-2-hydroxypropyltrimethylammonium chloride to obtain cationic starch; the cationic starch is then compounded with polymer-modified montmorillonite to obtain a high charge density composite retention and filtration aid.

The invention discloses a calcium-based desulfurizing agent and a preparation method thereof. The calcium-based desulfurizing agent is prepared from the following raw materials in percentage by mass: 53-61% of modified calcium hydroxide, 22-27% of modified activated carbon, 4-8% of an alkali metal compound, 3-5% of a metal oxide and 7-10% of a composite adhesive, the modified calcium hydroxide is obtained by carrying out multi-stage hydrothermal reaction on calcium hydroxide and treating and modifying silicon dioxide and sodium silicate; the modified activated carbon is oxidized activated carbon loaded with iron oxide and magnesium oxide. The calcium-based desulfurizing agent prepared by the method has very high activity, the removal efficiency of SO2 in flue gas can be improved, and the utilization rate of the calcium-based desulfurizing agent can also be improved.

The invention discloses CNTs (Carbon Nanotubes) reinforced asphalt pervious concrete and a preparation method thereof. The CNTs reinforced asphalt pervious concrete is prepared from the following components in parts by weight: 4 to 12 parts of modified asphalt, 75 to 85 parts of coarse aggregate, 6 to 10 parts of fine aggregate, 4 to 7 parts of cement, 3 to 5 parts of mineral powder, 1 to 1.5 parts of slaked lime and 0.2 to 0.8 part of reinforcing material CNTs. After the CNTs and the modified asphalt are stirred and mixed, light components are absorbed, so that the viscosity of the modified asphalt and the asphalt coating thickness on the surface of the aggregate are increased, and the bonding performance of the aggregate is improved; meanwhile, by utilizing the excellent physical properties of the CNTs, not only are the crack resistance and bearing capacity of the asphalt pervious concrete enhanced and the durability improved, but also the pore distribution of an asphalt mixture can be optimized by virtue of the CNTs particles with a reasonable mixing amount, a net-shaped cross-linking system is formed, the pore blockage of the pervious asphalt concrete is reduced, and the durability of the pervious asphalt concrete is improved. Therefore, the overall improvement of the water permeability and structural mechanical properties of the asphalt pavement is realized.

The invention relates to the technical field of coating preparation, and discloses a preparation method for preparing an inorganic gel coating based on iron-ore slag, which comprises the following steps: sieving coarse iron ore sludge to obtain fine iron ore sludge, and mixing fly ash with a dispersing agent to obtain a fly ash mixture; adding the liquid gel and water into a reaction container, and stirring at a high speed to obtain a mixture IV; sequentially adding titanium dioxide, fine iron ore sludge and a fly ash mixture into the mixture IV to obtain a mixture V; slowly adding a potassium silicate solution with the solid content of 25-35% to obtain a mixture VI; and adding a flatting agent and an alkali-resistant defoaming agent into the mixture VI, slowly dropwise adding deionized water, and continuously stirring to obtain the inorganic gel coating. According to the method, industrial solid waste resources are utilized, the production cost is reduced, meanwhile, high-added-value utilization is achieved, and the method has environmental protection benefits and practical value.

This invention provides a method for processing raw materials for enzymatic hydrolysis to produce lignocellulose, comprising the following steps: (1) heat-treating the lignocellulose-containing raw material; (2) selectively oxidizing and refining the heat-treated raw material; and (3) drying the selectively oxidized and refined raw material. This invention can increase the porosity of lignocellulose without increasing the refining intensity, and reduce pore closure caused by cellulose cutinization during the drying process after refining. It can produce lignocellulose materials with higher porosity, thereby producing lignocellulose materials with higher accessibility and reactivity.