39results about How to "Has a steric hindrance effect" patented technology

The invention provides non-aqueous decarburization solution for capturing carbon dioxide in a mixed gas, and belongs to the technical field of capturing of carbon dioxide gas. The invention relates to a non-aqueous decarburization solution, wherein a main absorption component is N-ethyldiethanolamine, and a solvent is N,N-diethylethanolamine. Because the non-aqueous decarburization solution has a high boiling point and low viscosity, uses tertiary amine capable of participating in CO2 absorption as the solvent, and uses secondary amine with a fast absorption speed and a high absorption amount, and easy to regenerate as the main absorption solvent, the absorption capacity, purification degree and desorption speed for carbon dioxide are increased, the temperature range of the reaction is expanded, the volume of a regeneration tower is reduced, the energy consumption of the regeneration is greatly reduced, and the equipment investment and operation cost are reduced. The non-aqueous decarburization solution provided by the invention is mainly used for capturing carbon dioxide in the tail gases of multiple chemical reactions, the tail gases of steel plants and cement plants, ore decomposition gas, combustion flue gas, natural gas, city gas and marsh gas, and has wide application prospect.

The invention provides a nanocellulose powder material and a preparation method, a redispersed nanocellulose slurry containing it and applications, including nanocellulose and a water-soluble polymer material; wherein, the water-soluble polymer material contains Hydrogen bonds and / or ether bonds. Applying the nano-cellulose powder material provided by the invention to water-based polymer coatings can improve the washing resistance of the coatings.

The invention relates to the technical field of building admixtures, in particular to a wet-mixed mortar plastic stabilizer and a preparation method thereof. The preparation method comprises the following steps: mixing 4-hydroxybutyl vinyl polyoxyethylene ether monomer, acrylic acid, methyl After mixing acryloyloxyethyl succinic acid monoester and water, add hydrogen peroxide; after the reaction, add the aqueous solution of the reducing agent, the aqueous solution of the cocatalyst and the acrylic acid, 2-amino-3-p-hydroxyphenyl propionate, 3- An aqueous solution composed of dihydromyrcenyl hydroxyphenyl phosphopropionate and a chain transfer agent; after the reaction, polyvinyl alcohol is added, and the pH is adjusted to 7-8 to obtain the plastic stabilizer for wet-mixed mortar. Compared with the prior art, the mortar synthesized by the wet-mixed mortar plastic stabilizer provided by the present invention has the advantages of low consistency loss, good water retention, high compressive strength and long-term stability of the mortar, and has significant progress .

The invention discloses anatase titanium dioxide nano-rods and a preparation method thereof. According to the invention, titanium alkoxide is adopted as a titanium source, an organic alkali is adopted as a glue solution, ethylene glycol-water or ethylene glycol-water-ethanol is adopted as a solvent; low-temperature glue solution is carried out, and then high-temperature hydrothermal reaction is carried out; and crystal growth is controlled in a manner of oriented bonding, such that the morphology of a final product is controlled in a special nano-rod shape. The oriented bonding direction is a (001) direction, and a crystal exposed surface is a {101} surface. With different reaction conditions, the diameters of the nano-rods are adjustable within a range of 5-60nm, and the lengths of the nano-rods are adjustable within a range of 50-400nm. According to the nano-rod growth process, a plurality of anatase grains are subjected to local bonding fusion according to a certain optimized direction through crystal lattice match sharing common crystal surfaces, such that the nano-rods with certain length-to-diameter ratio, good dispersion, and huge specific surface area is formed. With an electrode material prepared by using the nano-rods, higher electron collection efficiency can be easily obtained, and high photoelectric performance is provided.

The invention relates to a concrete cementitious material regulator and a preparation method thereof. The regulator includes the following components in parts by weight: 475-520kg of mixed alcohol amine grafts, 80-120kg of sodium thiocyanate, and stable dispersion Agent 40-60kg, polyphenolic compound 40-70kg and crospovidone 3-6kg, surplus is water; The preparation method comprises the following steps: S1. add water in stirring tank earlier, then add dispersion stabilizer and thiocyanate Sodium acid, the two components are fully stirred until they are completely dissolved in water; S2. Then add triethanolamine grafts, triisopropanolamine grafts, diethanolamine grafts, and cross-linked Povidone and polyphenol compounds are stirred for 15-25 minutes to obtain a finished mother liquor; S3. Finally, the finished mother liquor is diluted with water at a ratio of 1:12, and the finished concrete cementitious material regulator is prepared after stirring evenly. The invention has the effect of improving the dispersion performance of the concrete cementitious material.

The invention discloses a preparation method of a nanocapsule composite phase-change energy storage material. Firstly, a composite emulsifier, a co-emulsifier, and distilled water are added into a reaction kettle to form a clear solution; an organic phase-change energy storage material is added to the clear solution, and the At 5-10°C higher than the phase transition temperature, stir to obtain an emulsion; continue to add inorganic silicon source and stable dispersant to the emulsion, and stir to obtain a uniformly dispersed and stable emulsion; slowly add acid solution catalyst to the emulsion to trigger the formation of silicon source After hydrolysis and polymerization reaction, all the white precipitates are precipitated, then the stirring is stopped, and the reaction solution is naturally cooled to room temperature to obtain a precipitation solution. The precipitate is repeatedly washed with a mixture of water and petroleum ether, suction filtered, and dried. The nanocapsule composite phase change energy storage material prepared by the method of the present invention has a particle size of the capsule particles less than 1 μm, has high chemical stability, thermal stability, heat transfer and thermal conductivity, and phase change latent heat, and is effective in heat transfer and energy storage. Fields have a wide range of uses.

The technology field of the invention involved in the metal processing process has disclosed a brushed process of automobile signs, including the following steps: S1, drawing processes; S2, PVD surface processing processes; S2 also includes the following steps: step 1, PVD processing before processing; Wash the car signs through the cleaning agent, 15‑25min; step 2, baking; bake 10‑15min at 80‑90 ° C at the temperature of the vacuum furnace;Hanging; according to the number of weights, the cleaning agent in the step 1 includes the following components of weight: 70‑80 parts of polyethylene glycol cincharophenyl ether; modified agent;基15 copies of methyl oxygenne.The present invention has the following advantages and effects: polyethylene glycol cindian phenyl ether allows oil to break away from the metal surface; methyl trifle oxyxyne silane is deassed on polyethylene glycoline phenyl ether, adding hydrophilic basesMolecular measurement makes the modified polyethylene glycolic phenyl ether more likely to enter the liquid film, making the bubbles easily spread and penetrate the rupture.