92results about How to "Moderate mechanical strength" patented technology

The invention discloses preparation methods for a macroporous alumina carrier and a hydrodemetallization catalyst. The preparation method for the macroporous alumina carrier includes the following steps: (1) dry pseudoboehmite gel powder is hydrothermally processed under high pressure; (2) the dry pseudoboehmite gel powder obtained in step 1 is kneaded into a plastic, and pore-expanding agent is added in step 1 or step 2; (3) the plastic obtained in step 2 is shaped, the shaped material is dried and baked, and thereby the macroporous alumina carrier is obtained. The impregnation method is adopted to prepare the hydrodemetallization catalyst. The hydrodemetallization catalyst prepared by the method has large pore volume and pore diameter, centrally distributed pores, moderate mechanical strength and high activity and activity stability.

A polyurethane caulking material for expansion joints of a ballastless track of a high speed railway is disclosed. The caulking material is prepared from two parts A and B. the part A is composed of the following raw materials, by weight, 100 parts of isocyanate and its prepolymer, 10-150 parts of a plasticizer, 5-150 parts of a solid filler, 1-20 parts of a diluents, 1-5 parts of an adhesion promoter, 0-10 parts of a thixotropic agent and 1-3 parts of a water-removal agent. The part B is composed of the following raw materials, by weight, 10-20 parts of modified polyhydric alcohol, 1-5 parts of a diluent, 2-30 parts of a plasticizer, 5-30 parts of a solid filler, 0-5 parts of a thixotropic agent, 0.5-2 parts of an antifoaming agent, 0.1-1 part of an anti-aging agent and 0-0.01 part of a catalyst. The mass ratio of the part A to the part B is 4:1-10:1. The polyurethane caulking material has advantages of good low-temperature curing performance, high displacement capability, low tensile modulus, good bond property and excellent endurance quality and fatigue resistance, and is suitable for expansion joints of a ballastless track of a high speed railway as well as expansion joints of roads and airfield runways.

The invention belongs to the technical field of a lithium battery diaphragm, and particularly relates to a sodium alginate-based lithium battery diaphragm and a preparation method thereof. The lithium battery diaphragm adopts a sodium alginate-based composite nonwoven film as a base material and is prepared by adopting an electrostatic spinning process. The thickness of the prepared sodium alginate-based lithium battery diaphragm is 10 to 300 micrometers, the diameter of a fiber is 20nm to 2000nm, the ventilation is 1s to 600s/100cc, the porosity is 40 to 90 percent, the aperture range is 0.02 to 4 micrometers, the absorption rate of the electrolyte is 150 to 900 percent, the heat stability is excellent, and the size shrinkage percentage at the temperature of 150DEG C is less than 0.5 percent. The sodium alginate-based lithium battery diaphragm is excellent in performance, high in ion electric conductivity, appropriate in mechanical strength and excellent in electrochemical stability; moreover, the interface stability between the diaphragm and a positive and negative material is improved, the rate capacity of a lithium battery can be greatly improved, the cycling life is long, and the safety performance is improved. Meanwhile, the preparation process is simple and easy, the production cost is low, and mass production can be easy to realize.

The invention discloses a room-temperature self repairing type thermoplastic polymer material based on a multi-layer microcapsule and a preparation method thereof. The thermoplastic polymer material comprises the following components in parts by weight: 70-95 parts of thermoplastic polymer base and 5-30 parts of filled multi-layer microcapsule for self repairing. The multi-layer microcapsule in the self repairing polymer material is a multifunctional intelligent multi-layer microcapsule combining a repairing agent and a catalyst. When a crack is generated in the base, the crack causes the capsule wall of the multi-layer microcapsule to crack together with the base, the liquid repairing agent at the capsule core part is released to be in contact with the catalyst on the middle capsule wall so as to initiate polymerization reaction at room temperature, and a generated new polymer bonds the cracked surfaces, thus preventing the propagation of the crack and repairing the crack. The multi-layer microcapsule used by the invention has moderate mechanical strength and favorable heat stability, and can endure the common thermal forming and processing technology of the thermoplastic material.

Production of amphiphilic chitose derivative and its usage are disclosed. The process is carried out by taking chitose as raw material, alkalizing, reacting with 4-methyl bromoethyl acid in 2-propanol medium to obtain 6-0-carboxy-propyl-chitose, purifying, and reacting with long-chain fatty acyl chloride to obtain N-acyl-6-0-carboxy-propyl-chitose. In chemical formula, R=-(CH) n, n=8, 10, 12, 14, 16 and 18. It has excellent biological compatibility and degradation, good tissue adhesion and mechanical strength. It can improve wound heal and have styptic and adhesion-preventing functions.

The purpose of the present invention is to further suppress the occurrence of spectral irregularities in a liquid crystal display device that uses a light emitting diode as a light source, and uses an oriented polyester film having a given retardation as a polarizer protective film. This liquid crystal display device includes a backlight light source, two polarizing plates, and a liquid crystal cell disposed between the two polarizing plates. The backlight light source is a white light source having a continuous emission spectrum. The two polarizing plates are each formed from a polarizer and protective films on both sides of the polarizer. At least one of the protective films on either side is an oriented polyester film having a retardation of 3000 to 30000 nm. The main orientation axes of the oriented polyester films configuring the two polarizing plates are substantially parallel to each other.

The invention discloses a preparation method of an alumina supporter. The preparation method comprises the steps of a sol solidification process, a shaping process and a roasting process, a sugar solution with a concentration of 1-5mol/L is added in a sol system in the sol solidification process, and a molar ratio of sugar to aluminum in the sol system is 1-6. The alumina supporter prepared by the preparation method has a high hole volume and a high hole diameter, has concentrated hole distribution, has moderate mechanical strength, and is applicable to serving as a supporter of a heavy oil hydrotreating catalytic agent.

The invention relates to a mineralized collagen based skull repairing device and a manufacturing method thereof. The mineralized collagen based skull repairing device is made of a mineralized collagen/PCL (polycaprolactone) composite material; and the appearance of the repairing device comprises a spherical segment cap at the upper part and a cylindrical plug at the lower part. A separation mold and a secondary pouring technology are adopted during preparation of the mineralized collagen based skull repairing device, and the product defect caused by air residue at the blind end of the mold is overcome. The skull repairing device made of the mineralized collagen/ PCL composite material has excellent osteogenic activity, the material is gradually and passively degraded under the creeping substitution action of cells, and growth of new bones can be guided at the skull defect part. A degradation product of the composite material is neutral, acidic materials causing aseptic inflammation cannot be generated, and new bone formation isn't affected; and through composition of PCL, the skull repairing device has excellent elasticity and toughness besides enough crush resistance and bending strength, and the repairing requirement of a skull of a human body is met.

The invention relates to a method for preparing activated carbon fiber medical dressing. The method specifically comprises the following steps: (1) carrying out pretreatments on a clean raw material fiber, such as deoiling, roughening and activating, and cleaning the clean raw material fiber; (2) chemically silvering the fiber, and supplementing related consumed functional components in the plating solution after the plating operation; (3) washing, dewatering and drying the silver-loaded fiber; (4) pre-treating, carbonizing and activating the silver-loaded fiber. The method is simple in process and principle, the used chemical silvering solution is stable and is suitable for mass production, and granules in the prepared silver-loaded carbon fiber material are firm in binding force with the matrix, moderate in mechanical strength, excellent in antibacterial ability and continuous in stability, so that the silver-loaded carbon fiber material has a broad application prospect in the healthcare industry.

The invention discloses single cylinder type anaerobic-aerobic composite microencapsulation biological fluidized bed automatic control equipment, wherein an anaerobic fluidized bed body is a reaction area which is, from top to bottom, orderly provided with a water inlet(outlet), a water distribution machine, an electric heating pipe, a grille, an overflow opening, a lighting device, a sampling opening, an automatic detection device and a material feeding and gas exhaust device; water source enters from the bottom of the anaerobic fluidized bed through an ultraviolet sterilizer, and a microbe capsule is driven to keep in fluidized state by water flow; wastewater in the anaerobic fluidized bed directly flows in a pollution discharge pond or an aerobic fluidized bed through the water outlet pipe on the bottom; an aerobic fluidized bed body is similar to the anaerobic fluidized bed body, but the difference lies in that an aeration disk is used to replace the water distribution machine, and the microbe capsule is driven to keep in the fluidized state by air flow; and because channels of the anaerobic fluidized bed and the aerobic fluidized bed are provided inside with one-way valves, the anaerobic fluidized bed and the aerobic fluidized bed can independently work. Under the condition of saving labor, the equipment realizes that the high-concentration polluted wastewater is denitrified and dephosphorized with high efficiency, and the pollution discharge meets the national standards; moreover, the equipment also has the advantages of simple structure and automatic operation.

The invention discloses a preparation method of artificial liposome, belongs to the field of pharmacy, and relates to a preparation method of protein medicament liposome. In the preparation method, nano spherical grain yolk lecithin zirconium or soya bean lecithin zirconium is used as a carrier, and balsam pear protein MAP30, fleece-flower root protein GAP31, lipase CRL or bovine serum albumin (BSA) is used as a wrapping protein. The preparation method comprises the steps of: adding phosphate buffer solution to the carrier material, stirring under the conditions of the temperature being 4 DEG C and rotation rate being 3500rpm to obtain a colorless and transparent dispersion, dissolving the wrapping protein in a phosphate buffer solution, then slowly dropwise adding to the dispersion, quickly stirring in the low-temperature condition to form stable liposome, centrifugally separating out protein, repeatedly washing, centrifuging, and freeze-drying at low temperature to obtain a finished product. The method has the characteristics of simple process, mild condition, high repeatability, high protein adsorption capacity and stable liposome structure.

A surface wetting treatment method for battery cell diaphragm of new energy automobile battery includes preparing diaphragm, extracting diaphragm, preparing a coating agent, drying the diaphragm, coating the diaphragm, preparing a polyester fiber membrane, unifying two membranes, and performing immersion treatment and vacuum plating. The present invention is characterized in that a diaphragm is made of a mixed material of polypropylene and polyethylene, compared with polypropylene, the diaphragm resists high temperature; compared with polyethylene, the diaphragm resists low temperature; combined with the composite of polyester fiber membrane, the diaphragm has thermal stability, high temperature resistance, low temperature output, long charging cycle life, moderate mechanical strength; andthrough the effect of the extracting agent, the invention facilitates the extraction of the soluble substance after the film is formed, makes the diaphragm into a microporous structure, and cooperates with the stretching action before and after the extraction to make the micropores more uniform, so that the permeability is stronger even when the electrolyte ions are transmitted, and the tensile strength and the mechanical properties of the diaphragm are improved by stretching, so that the diaphragm is not easy to be broken.

The invention provides a thermally-stable hepatitis A vaccine soluble microneedle patch, which includes a needle body and a backing. The needle body is composed of a hepatitis A vaccine, a matrix material and a vaccine stabilizer, wherein the vaccine stabilizer is a mixture of polyvinylpyrrolidone and dextran; and the content ratio of the vaccine stabilizer to the hepatitis A vaccine is (2: 1)-(5:1). The hepatitis A vaccine soluble microneedle patch prepared in the invention has good thermal stability of the needle body medicine and moderate mechanical strength, and can effectively penetratethe skin.