94results about How to "Gel fast" patented technology

The disclosure provides compositions and systems for topical ophthalmic application, which include an aqueous mixture of bromfenac and flowable mucoadhesive polymer, for treating inflammation and inflammatory conditions of the eye.

The invention provides a low-cost method for preparing aerogel by means of atmospheric pressure drying. The method is characterized by comprising the steps of mixing a silicon source (comprising organosilicone and inorganic silicate) with water, adjusting the pH of a mixture system to a gel environment by using acid, and gelatinizing the mixture system to form hydrogel; then, washing the obtained hydrogel with tap water, and naturally draining off so as to reduce the salinity in the hydrogel; washing the hydrogel with a water solution prepared from a surface active agent and then naturally draining off, sending the hydrogel into an atmospheric pressure drying oven, wherein an ultrasonic generator is arranged in the drying oven, directly heating and drying under the assistance of ultrasonic wave so as to obtain the aerogel. The method greatly reduces the structural shrinkage, caused by a surface tension effect, of the hydrogel in a drying process by means of the assistance of ultrasonic wave, thus realizing low-cost atmospheric pressure drying preparation of the aerogel.

The invention provides an injecting paste material for a plate-type ballastless track. The injecting paste material includes a component A and a component B, wherein the component A includes the following materials in parts by weight: 40-80 parts of polyhydric alcohols, 5-10 parts of cross-linking agents, 1-50 parts of plasticizers, 4-20 parts of chain extenders, 1-50 parts of diluents, 0.1-10 parts of curing accelerators, 1-5 parts of antioxygen, 1-5 parts of coupling agents, 0.04-0.2 part of water and 0.5-5 parts of foam stabilizer; the component B includes the following materials in parts by weight: 50-150 parts of isocyanate or isocyanate prepolymers and 1-50 parts of diluents; when temperature changes, a component C or D can be added into the mixture of the components A and B to meet the construction requirements at different temperatures, the solidification strength of the injecting paste material is not influenced by humid environment, and the mechanical properties of the material are excellent.

A process for preparing high-pass porous membrane mainly comprising, dissolving polymer (polyethersulfone orpolyacrylonitile) and inorganic additive into suitable organic solvent, mixing the mixture into casting film liquid uniformly after complete dissolution, slobbering the casting film liquid onto the nonwoven fabric supporting body, immersing the nonwoven fabrics with casting film liquid into suitable gel agent, the additive reacting with the gel medium, the membrane liquid on the nonwoven fabrics simultaneously forming porous membrane in the gel bath, and submerging the porous membrane in acid solution. The invention can be applied for obtaining membrane having increased water flux.

The invention discloses an artificial stone and a preparation method thereof. The artificial stone comprises the following raw materials in percentage by weight: 30-60% of quartz, 30-60% of crushed glass, 5-10% of alloy resin, 0.01-3% of alloy powder, 0.01-0.5% of pigment, 0.01-0.5% of a coupling agent and 0.01-0.5% of a curing agent. The artificial stone has the characteristics of art attractiveness, health and environment-friendliness. Due to addition of the alloy powder and the alloy resin in the formula, the artificial stone has an outstanding antibacterial function, is relatively high in anti-permeability and moisture resistance, long in service life and relatively good in glossiness, fullness and moisturizing property, the waste glass and the waste gel can be utilized again, thus being energy-saving and environmentally friendly; flowers can be also made according to demands, and thus artificial stone with patterns can be manufactured.

The invention relates to the technical field of food, in particular to a 3D printing material for gelatinized confections and a preparation method of the 3D printing material. Starch and low-acyl gellan gum in the 3D printing material are taken as gel, remelting is facilitated, rapid gelling at room temperature can be realized, smooth discharge can be guaranteed during 3D printing, stability of the printing material can be improved with application of plant extract, so that the printed confections can be stored for a long time, and sugar crystals are avoided. Experiments prove that the 3D printing material can be printed successfully, sensory evaluation of the obtained products is good, and sugar crystals or sugar dissolution does not occur when the products are placed at room temperaturefor 60 d.

The invention discloses a solid absorbent with high CO2 adsorption capacity and a preparation method thereof. The solid absorbent comprises active components and a carrier; the active components are alkali carbonate and an amino group at the surface of the carrier, and are 15-60% of total quality of the solid absorbent; the molar ratio of the alkali carbonate and the amino group is 1 to (0.5-25); and the carrier is monox, and is 40-85% of total quality of the solid absorbent. The preparation method comprises the following steps of mixing and stirring the materials into emulsion; putting the emulsion into air to form cross-linking gel; putting the gel into a sealed dryer; soaking the gel by ethanol; and drying and screening the gel by a supercritical drying method, so as to prepare the solid absorbent with high CO2 adsorption capacity. The absorbent is low in price, stable in structure, high in carbonic acid conversion ratio, not easy to inactivate, and small in corrosion on equipment, and has certain mechanical strength, and high cyclic utilization rate; and the preparation method of the absorbent is convenient to operate, and low in expenses.

A gelling agent, and a method of use for the same, for gelling a puncture repair material, the puncture repair material including a natural rubber latex, a resin emulsion, and an antifreezing agent, the gelling agent comprising a compound (α) of the following Formula (1). In the following Formula 1, R¹ is an alkyl group having from 13 to 30 carbon atoms or an alkenyl group having from 13 to 30 carbon atoms.

The invention discloses a method for preparing a monolithic porous carbon with basic magnesium carbonate for catalyzing phenolic aldehyde to be polymerized, which includes the following steps: (1) a saturated basic magnesium carbonate solution is prepared; (2) resorcinol and formaldehyde are sequentially added into the saturated basic magnesium carbonate solution sealed after being stirred, and after four hours of reaction under 70 DEG C to 100 DEG C, a wet gel is obtained; (3) after being dried, the wet gel obtained in step (2) is put into a tubular carbonization furnace, reacts under the protection of inert gas for two hours after being heated to 650 DEG C to 1050 DEG C, and is then naturally cooled to room temperature, and thereby the monolithic porous carbon is obtained. With resorcinol and formaldehyde as carbon soruces, the method utilizes the catalytic effect and easy decomposition property of basic magnesium carbonate to prepare the monolithic porous carbon by rapid gelation and carbonization control, and the mechanical strength reaches 9.4MPa. The method has high gelation speed, the specific surface area of the prepared product is large, and the CO2 equilibrium absorption capacity is high.

The invention provides a polyurethane coating material for shoe coating and a preparation method of the polyurethane coating material. The preparation method comprises the following steps that step (1) isocyanate, polyester polyol, a moisture scavenger and a diluent are added into a reaction kettle in proportion and mixed evenly, reaction is carried out for 6-8 hours under the condition of 80-120DEG C, vacuum bubble removal is carried out, and cooling is performed to obtain a component A; step (2) polyester polyol, a chain extender, a catalytic agent and a glycerin solution of dehydrated aluminum potassium sulfate dodecahydrate are added into the reaction kettle in proportion and mixed evenly and vacuumized for 2-3 hours to remove bubbles, and a component B is obtained; and step (3) the component A and the component B are evenly mixed in proportion, vacuum bubble removal is carried out for 30s, and the polyurethane coating material is obtained. The prepared polyurethane coating material is used for coating the surface of a shoe, once-forming can be achieved, and the problem that bubbles generated in the coating due to the fact that a known spraying polyurethane elastomer reacts with moisture is further solved.

Certain embodiments include a surgical delivery system for a medical sealant including a packaging system with a detachable a sterile surface for mixing the sealant as needed for application.

The invention belongs to the technical field of electronic packaging materials, and particularly relates to a low-modulus epoxy resin system and a preparation method thereof. The low-modulus epoxy resin system of the invention comprises the following main components: epoxy resin, a polymercaptan curing agent, a tertiary amine curing accelerator and the like, and has the characteristics of low curing temperature, adjustable gel reaction speed, low modulus of curing products, and adjustable modulus by the addition of inorganic fillers. The low-modulus epoxy resin system can be used as a substrate resin of electronic packaging materials such as bottom fillers, encapsulation agents, chip adhesives and the like for reducing packaging internal stress, and has wide application prospects in the electronic packaging field.

The invention discloses a preparation method of a cellulose conducting hydrogel for 3D printing. The preparation method comprises the following steps: preparing a mixed solution of ZnCl2 and CaCl2, adding cellulose, and stirring the mixture magnetically to 50-90 DEG C to dissolve the mixture for 10-90 min to be fully dissolved to obtain a cellulose solution; adding water or small molecular alcoholinto the cellulose solution, and stirring the mixture at 50-90 DEG C for 5-30 min till being uniform; and debubbling and cooling the mixture to obtain the cellulose conducting hydrogel. The celluloseconducting hydrogel has the advantages of being high in gelation rate, good in freezing resistance, good in thermal reversible mechanical property, high in transparency, high in conducting property and the like. The mechanical property of the cellulose conducting hydrogel prepared by the method at 20 DEG C below zero is equivalent to that at 25 DEG C, and the cellulose hydrogel at 60 DEG C belowzero is not frozen, too.

A silver clay that can be obtained by sintering at a low temperature. A silver powder for silver clay is a fine Ag powder having an approximate average particle diameter equal to or less than 2 μm incorporated at 15 to 50 weight %, with the remainder being an Ag powder having an average particle diameter that exceeds approximately 2 μm and is equal to or less than approximately 100 μm. The silver clay includes this silver powder incorporated at approximately 50 to 95 weight %, a binder at approximately 0.0 to 8 weight %, an oil at approximately 0.1 to 3 weight %, and a surface active agent at approximately 0.03 to 3 weight %, with the remainder being water.

Disclosed is a method of making adhesive for geosynthetics, which relates to the synthesis of modified polyacrylamide. The method comprises the steps: synthesizing polyacrylamide with low molecular weight, wherein the monomer is acrylamide and the initiator is ammonium persulphate and the chain transfer agent is sodium formate; hydroxymethylating the low- molecular- weight polyacrylamide with formaldehyde under alkaline condition; obtaining modified polyacrylamide through condensation reaction between hydroxymethylation polyacrylamide and acrylamide under alkaline condition; synthesizing gel under room temperature by rapidly crosslinking the modified polyacrylamide aqueous solution with crosslinking agent, initiator and accelerator; finally adding bentonite. The nontoxic modified polyacrylamide is provided with rapid crosslinking polymerization, less heat release during crosslinking polymerization, high gel strength and long service time, suitable for the preparation of geotechnical waterproof material when wrapped by bentonite.

A method for improving compactness of a silicon dioxide coating layer on the surface of titanium dioxide comprises the following steps: (1) preparing titanium dioxide into titanium dioxide slurry; (2)adjusting the reaction temperature to ensure that the temperature is constant in the titanium dioxide coating process; (3) adding a pre-dispersing agent and NaCl solid into the titanium dioxide slurry under the action of stirring, the pre-dispersing agent being trisodium citrate; (4) adjusting the pH value of the titanium dioxide initial slurry; (5) applying a compact SiO2 coating layer with sodium silicate in a parallel flow manner by adopting a peristaltic pump, and curing to obtain coated product slurry; and (6) washing and drying the coating slurry product, and carrying out steam powder treatment to obtain compact SiO2 coated titanium dioxide. The process is simple and the raw material cost is low. The dispersity of the titanium dioxide slurry can be improved, and the formation of a silicon dioxide coating layer is favorably induced, so that a titanium dioxide coating product with a more uniform and compact coating layer is prepared.