7 results about "Cellular cement" patented technology

The invention relates to the field of cement films, in particular to a porous cement film and a preparation method thereof.The porous cement film is prepared from raw materials including a functional modified polymer, a dispersing agent, a binding agent, cement and water; the functional modified polymer is a polymer containing quaternary ammonium salt cations, a phosphate group and a chitosan structure, the functional structure is introduced through a chemical means, excellent hydrophilicity, antibacterial property, cation adsorbability and antistatic property are achieved, and meanwhile the problem of mechanical property difference caused by a traditional physical blending mode is avoided.

The application discloses a humidity-responsive porous cement-based sound-absorbing material and a preparation method thereof, and belongs to the technical field of porous sound-absorbing materials.The humidity-responsive porous cement-based sound-absorbing material is composed of the following components in proportion by weight: 100 parts of cement, 50 parts of water, 16-22 parts of amino acid modified starch-based copolymer, 3 parts of hydrogen peroxide, 1.2-6 parts of ferrous salt and 0.2 part of nano-alumina.The prepared material is no longer a static porous structure, but a system with humidity response capability.In a high-humidity environment, the polymer in the pore structure will rapidly absorb water and swell, thereby automatically and reversibly blocking the pore channel and forming a dynamic waterproof barrier, effectively preventing water from entering and avoiding freeze-thaw damage;when the environmental humidity decreases, the polymer in the pore loses water and shrinks, thereby reopening the pore channel and restoring the excellent sound-absorbing performance.

This invention relates to a low interfacial impedance cement-based zinc battery, its preparation method, and its application. The cement-based zinc battery includes a cement-based electrolyte, and positive and negative electrode material layers on opposite sides of the surface of the cement-based electrolyte are respectively fused using 3D printing technology. The specific steps are as follows: a porous cement-based structure is manufactured using cryogenic casting technology and then used after salt solution immersion treatment; the cement-based electrolyte and zinc (copper) electrodes are assembled in an inert gas-filled environment using a fixed laser scanner and 3D printing equipment, with copper as the positive electrode, the cement-based structure as the electrolyte, and zinc as the negative electrode. Compared with existing technologies, this invention directly fuses the electrode material onto the surface of the cement-based electrolyte, improving the interfacial stability between the electrode and the electrolyte, solving the problem of high interfacial impedance between the electrolyte and the electrode, improving the overall battery performance, and the process is simple.

To provide a method for forming a carbonated lightweight foamed cementitious hardened body capable of immobilizing carbon dioxide.SOLUTION: A method for forming a carbonated lightweight foamed cementitious hardened body includes the steps of: obtaining a cement-containing mixture by mixing cement and water for a cement-containing mixture which is a part of the water contained in the cement composition; obtaining bubbles by mixing a foaming agent, water for foaming agent-containing water which is a part of the water contained in the cement composition, and a gas; mixing the cement-containing mixture and the bubbles to obtain an unhardened cement composition; casting the unhardened cement composition to form a lightweight foamed cementitious hardened body; and spraying the lightweight foamed cementitious hardened body with carbon dioxide gas at a rate of 1 to 50 liters / minute and for 20 to 420 minutes within a period from 0.75 to 15 days of age to form a carbonated lightweight foamed cementitious hardened body.SELECTED DRAWING: None

The invention discloses a self-floating porous cement-based photo-thermal interface evaporator and a preparation method and application thereof. According to the evaporator, a unique layered porous structure with a photo-thermal evaporation layer, a supporting floating layer and a water conveying layer is constructed through an air pressure regulation and control bubble technology; as efficient and stable sea water desalination equipment, the evaporator can achieve the high evaporation rate of 3.13 kg.m <-2 >. H <-1 > and the evaporation efficiency of 92.22% under the illumination of one sun, and shows excellent mechanical strength and durability; besides, collaborative regulation and control of photo-thermal conversion, moisture delivery and thermal management are realized through a layered porous structure, salt deposition is effectively inhibited, long-term stable evaporation is realized, and the material shows remarkable large-scale seawater desalination application potential in a complex environment.

This invention belongs to the field of bridge deck pavement technology, specifically relating to a self-healing drainage pavement structure for concrete bridge decks and its construction method. The key technical points are as follows: The pavement structure, from bottom to top, includes: a cement concrete slab base layer, a wet-bonding resin layer, a self-healing porous concrete pavement layer, a high-temperature reactive bonding layer, and a self-healing PA-10 pavement layer. The self-healing porous concrete pavement layer comprises concrete mix and microbial-loaded ceramsite. The microbial-loaded ceramsite is prepared by carbonizing and modifying ceramsite and then loading it with Bacillus subtilis. This invention incorporates pre-loaded microbial ceramsite into a porous cement concrete structure to achieve self-healing of cracks. Combined with the upper large-pore self-healing PA-10 structure, it meets the air and moisture requirements of the microorganisms, effectively enhancing the depth of the microbial self-healing effect, while simultaneously achieving synergistic consistency between drainage and self-healing functions of the upper and lower layers.

The application relates to a kind of etching method for regulating porous cement-based diaphragm and its preparation method and application, and belongs to the technical field of battery diaphragm.The preparation method flow of the cement-based diaphragm includes cement neat paste test piece forming, polishing, etching and drying.The etching is to dissolve the composition of cement neat paste itself by using acid solution, improve the porosity and pore connectivity of cement neat paste, expand the transmission channel of ions, and then improve the ion conductivity of cement neat paste.The prepared cement-based diaphragm can be applied to super capacitor, hybrid super capacitor and battery.The energy storage device includes tab, positive electrode, negative electrode and cement-based diaphragm after etching and impregnated with electrolyte between two electrodes.The preparation process of the cement-based diaphragm is simple and reasonable, convenient to operate, can improve the porosity of cement neat paste, provide more channels for the transmission of ions in its interior, thereby improve the ion conductivity of cement neat paste, so that it can have better energy storage performance when used as diaphragm.