42results about How to "Controllable nature" patented technology

The present invention relates to medical polymers field, especially a temperature sensitive and biodegradable triblock copolymer with gel-sol transformation characteristics and preparation method thereof and usage. The triblock copolymer is PEG-PCL-PEG copolymer, the aqueous solution thereof performs Sol-Gel phase transformation along with the temperature rise and the phase transformation temperature is 25-35 degree. The PEG-PCL-PEG copolymer has a variety of excellent features to provide a new choice in field which is in need of temperature sensitive material.

The invention relates to a preparation method of a pillared stesterite type catalytic cracking flue gas sulfur transfer agent. The method comprises the following steps: mixing magnesium saponite with water to obtain a magnesium saponite dispersion; mixing iron source, magnesium source, aluminum source and / or cerium source with water or oxalic acid, and adding NaOH solution to prepare a crosslinking agent solution ;Mix the magnesium saponite dispersion and the crosslinking agent solution, keep it at 10-80°C for 5-30h, and then keep it at 90-130°C for 1-40h to obtain crosslinked magnesium saponite; impregnate cerium nitrate on the crosslinked magnesium saponite , roasted to obtain the pillared magnesium saponite type catalytic cracking flue gas sulfur transfer agent. The pillared stesterite-type catalytic cracking flue gas sulfur transfer agent prepared by the method provided by the invention has good desulfurization activity.

The invention discloses a hydrogel microcarrier and its preparation method and application. The hydrogel microcarrier uses an oil phase solution as a carrier, and an aqueous phase solution containing an initiator and two or more colloidal materials is dispersed in the In the oil phase solution, by changing the concentration ratio of different gel-forming materials, a density-coded hydrogel microcarrier is formed. Its preparation method is to mix two or more gel-forming materials with different concentration ratios and initiators to obtain a water phase solution; dissolve the surfactant and TEMED in an oil medium to obtain an oil phase solution, and wrap the water phase solution in oil In the phase solution, hydrogel beads are formed, and the hydrogel beads are solidified into density-coded hydrogel microcarriers. The hydrogel microcarrier of the present invention can realize multiple detection of disease-related proteins and visual detection of tumor-derived exosomes, and has the advantages of simple decoding and low detection cost.

The invention discloses a colloidal ozone bubble and its preparation method and application. The preparation method of the colloidal ozone microbubble is as follows: in the mode of continuously generating bubbles, firstly, a surfactant solution is preset in a bubble generation tank , the reserved amount of the surfactant solution accounts for 30-40% of the tank volume of the bubble generation tank, and the surfactant solution in the bubble generation liquid storage tank is passed through the liquid inlet pump at a flow rate of 50-80mL / min Pass it into the bubble generation tank, and at the same time pass the air into the air source ozone generator, 3000V high voltage power supply to the ozone generator to work quickly convert oxygen into ozone, get high concentration of ozone ion mixed air from the bottom of the bubble generation tank The air inlet of the air inlet is passed into the bubble generation tank at a flow rate of 16.7-66.7mL / min, and the high-speed stirrer stirs the gas-liquid mixture at 4000-6000rpm, and the stirring time is 40-80s. The generated bubble suspension is colloidal ozone micro bubble. The colloidal ozone microbubbles described in the invention are applied to the treatment of polycyclic aromatic hydrocarbons (PAHs) pollutants in water body sediments.

The invention discloses a liquid phase preparation method of stannite structure Cu2FeSnS4 powder for photovoltaic cells. The liquid phase preparation method comprises the steps of weighing CuCl2.2H2O, FeCl3.6H2O, SnCl4.5H2O and thiourea according to a mole ratio of CuCl2.2H2O to FeCl3.6H2O to SnCl4.5H2O to thiourea of 2:(1-1.5):(1-1.5):(4-5), then mixing in a round-bottomed three-necked flask, and then adding an organic mixed solvent or an organic single solvent; introducing nitrogen as protective gas, heating the flask to 200-250 DEG C in a constant-temperature oil bath, preserving heat for 0.5-12 hours, and then naturally cooling to the room temperature; washing the product by using anhydrous ethanol and distilled water in sequence, and then filtering and drying to obtain black powder. The liquid phase preparation method of the stannite structure Cu2FeSnS4 powder material is environmental friendly and pollution-free, short in reaction time, low in required temperature, simple and convenient in operation and low in cost, and is suitable for industrialization of Cu2FeSnS4 powder applied to absorbent layers of photovoltaic cells.

The present invention provides a method for preparing a fluorescent probe with controllable hydrophilicity and hydrophobicity and its application. The method includes: using amphiphile molecules as raw materials, controlling the hydrophilicity and hydrophobicity of fluorescent vesicles and fluorescent micelles by turning on / off light The method provided by the present invention realizes the transformation of the hydrophilic and hydrophobic properties of the amphiphile solution through the control of the light switch, the process is green and simple, easy to operate, the whole process is easy to control, and the properties and morphology of the fluorescent vesicles and fluorescent micelles are realized. Controllable, the obtained fluorescent vesicles and fluorescent micelles can enter the nucleus for imaging, and have good application prospects in optoelectronic materials, bioimaging, diagnostic sensors, drug delivery materials, catalytic materials, or water treatment adsorption and degradation materials.

The invention relates to a block copolymer and its hydrogel as well as application. The block copolymer of the invention is a temperature-sensitive block copolymer with a solution-gel transition characteristic. Specifically, the block copolymer of the invention is a BAB or ABA-type triblock copolymer composed of a poly(2-alkyl-2-oxazoline) (PAOz) block B and a polyester (PE) block A, or a copolymer containing the triblock copolymers. The aqueous solution of the block copolymer undergoes solution-gel phase transition along with temperature rise, and the phase transition temperature is 20-80DEG C. The block copolymer has good biocompatibility and biodegradability. The copolymer provided in the invention can provide a suitable drug delivery system for controlled release of stereotactic injection preparations and drugs, and also can provide a gel matrix and an effective means for enzyme immobilization, cell culture, tissue engineering, and vascular thrombosis, etc., as well as provides an appropriate material and technique for gelation of various aqueous solutions or aqueous humor systems in food, health care products and other fields. The method involved in the invention has the advantages of simple operation, high product yield, high purity, controllable property, and suitability for large-scale production application.

The invention relates to the field of cellulose nanocrystals, in particular to a cellulose II type nanocrystal particle and its preparation method and application. The crystallinity of the cellulose II type nano crystal particles is more than or equal to 80%, the number average molecular weight is 1200-2500, and the molecular weight distribution coefficient Mw / Mn is less than or equal to 1.30. The preparation method of the cellulose type II nanocrystalline particles includes: first performing amorphization and reconstruction of the cellulose raw material, recrystallization and acid hydrolysis, and the crystallization and acid hydrolysis can be carried out under low-concentration acidic conditions, and the cellulose nanocrystalline material is realized. efficient, clean production and quality control. The cellulose type II nanocrystalline particles prepared by the method have high crystallinity, small molecular weight, narrow molecular weight distribution, narrow size distribution, clear surface conformation and great surface chemical modification potential, and can be used for catalyst carrier, composite material reinforcement and other purposes.

The invention relates to a suspension roasting manganese and iron treatment method of iron-contained manganese ore, and belongs to the technical field of mineral processing. The method includes the following steps that (1) the iron-contained manganese ore is crushed to be subject to ore grinding; (2) first-section low-intensity magnetic separation is carried out; (3) first-section low-intensity magnetic separation gangue is placed into a roasting furnace, gas and air are led in, and the first-section low-intensity magnetic separation gangue is subject to oxidizing roasting; (4) a reduction roasting furnace is adopted, and oxidization powder ore is placed into the reduction roasting furnace to be subject to reduction roasting; (5) roasted ore is subject to second-section low-intensity magnetic separation; and (6) first-section low-intensity magnetic concentrate and second-section low-intensity magnetic concentrate are merged to serve as an iron ore concentrate finished product. The suspension roasting manganese and iron treatment method is simple in technological process, large in equipment treatment amount, easy in product character control, capable of achieving industrialized application, capable of achieving energy conservation and environmental protection and capable of easily achieving large scale.

An intensified sorting method for complex iron ores based on accurate control of ore phase segmentation, which is carried out in the following steps: (1) crushing and grinding the complex iron ores; (2) transporting the ore powder to a pre-oxidation roaster , carry out pre-oxidation roasting in a suspension state, and then enter the cyclone separator; (3) After the pre-oxidation roasting material is separated by a cyclone, it is discharged into the regenerative reduction roaster, and the reduction roasting is carried out in a suspension state; (4) The reduced material enters the first-stage Cooling cyclone separator, nitrogen cooling to 200~300°C; (5) Cooling and reducing materials enter the secondary cooling cyclone separator through the flow seal valve, and re-oxidize with air, and the temperature drops to ≤100°C; (6) Carry out weak Magnetic separation to obtain iron concentrate. The method of the invention has simple flow, low energy consumption and cost per unit of processing capacity, easy control of product properties, and easy realization of large-scale equipment.

The invention belongs to the field of pharmaceutical preparations and discloses a preparation method of loratadine nano crystals and oral tablets thereof. Loratadine is a kind of BCS Ⅱ medicine, and its solubility is extremely low and is pH-dependent. In order to improve the dissolution rate and bioavailability of the medicine and improve individual variability, the present invention adopts high-speed shearing combined with high-pressure homogenization method to prepare loratadine. The radadine nano crystal adopts the powder direct compression method to prepare the loratadine nano crystal oral tablet. The preparation process of the invention is simple, fast, environment-friendly and easy for industrialized large-scale production. The dissolution rate was evaluated by an in vitro dissolution test. The loratadine nanocrystals and tablets prepared by this method can be rapidly dissolved in various pH media, thereby improving bioavailability and improving individual variability.

The invention discloses a kesterite structure Cu2ZnSnS4 powder material for a solar photovoltaic cell, and a liquid phase preparation method thereof; the liquid phase preparation method comprises the steps that: the material is weighed in the principle of CuCl2.2H2O:ZnCl2:SnCl4.5H2O:sulphur powder=2 (1 to 1. 5): (1 to 1. 5): (4 to 5) (molar ratio) and put into a round-bottom three-neck flask to be mixed, then organic solvent triethylene tetramine solution is added in, the mixture stays still for 3min to 5min, and uniform brick red solution is obtained; after nitrogen is fed in as protective gas, and the brick red solution is put into constant temperature oil bath to be heated to 120DEG C to 240DEG C, maintained for 0.5h to 12h, and then naturally cooled to room temperature; anhydrous ethanol and distilled water are used for sequentially washing a product, then the product is filtered and dried, and black powder is obtained. The liquid phase preparation method of the kesterite structure Cu2ZnSnS4 powder material is green, has no pollution, short reaction time and low required temperature, is convenient to operate, has low cost, and is applicable to the large-scale production of Cu2ZnSnS4 powder (for a photovoltaic cell absorption layer).

The invention belongs to the technical field of mineral processing, and discloses a method for separating aluminum and iron through suspension roasting for high-iron bauxite. The method comprises thefollowing steps that (1) the high-iron bauxite is crushed and levigated; (2) first-stage low intensity magnetic separation is carried out; (3) first-stage magnetic separation tailings are subjected tooxidizing roasting; (4) oxidation fine ore is put into a reduction roasting furnace for reduction roasting; (5) reduced fine ore is subjected to second-stage low intensity magnetic separation; and (6) second-stage magnetic separation tailings are subjected to strong magnetic separation, and strong magnetic separation concentrates and second-stage low intensity magnetic separation concentrates arecombined into finished iron concentrates. The method is simple in technological process and large in equipment handling capacity, the product properties are easy to control, energy saving and environment protection are achieved during industrial application, and enlargement is easy to achieve.