180results about How to "Raw materials are widely available" patented technology

The invention discloses a method for preparing gold nano-rods. The method includes the steps: adding chloroauric acid solution and optional gold seed generating regulating agents into CTAB (cetyl trimethyl ammonium bromide) solution, adding silver nitrate solution, weak reducing agents and strong reducing agents into the CTAB solution and reacting at the constant temperature of 25-40 DEG C for 5-30min to obtain reaction liquid A; and adding silver nitrate solution, optional gold nano-rod growth regulating agent solution and water into the reaction liquid A to obtain reaction liquid B, and continuing reaction to obtain the gold nano-rods. The method is simple in process and operation and fine in reproducibility, the diameter of coverage of the prepared gold nano-rods is as small as 5nm to tens of nanometers, LSPR (localized surface plasmon resonance) peak value coverage in the length direction ranges from 630nm to 1010nm, counts in a TEM (transmission electron microscopy) graph indicate that more than 90% of rod products among obtained gold nano-particle products are high in rod yield, and the ratio of an LSPR peak value to a TSPR (transverse surface plasmon resonance) peak value is not lower than 2 in a UV-Vis (ultraviolet visible) absorption spectrogram. Raw materials used in the method are widely and easily obtained, and production cost is low.

The invention discloses three-dimensional alumina fiber fabric reinforced oxide ceramic. Al2O3, SiO2 and SiOC ceramics are used as a substrate, a three-dimensional alumina fiber fabric is used as a reinforcing body, alumina and silicon dioxide in the substrate are introduced by a sol-gel process, and the SiOC ceramic is obtained by high-temperature cracking of polysiloxane. The preparation method of the three-dimensional alumina fiber fabric reinforced oxide ceramic comprises the following steps: performing vacuum soaking, gelating and high-temperature ceramic treatment on oxide sol serving as a precursor, and repeating for multiple times to obtain an alumina fiber reinforced oxide blank body; soaking the blank body in vacuum by using a polysiloxane-ethanol solution as a precursor, and performing crosslinking and high-temperature ceramic treatment to complete a densifying process; and repeating the steps for multiple times to obtain the oxide ceramic blank body, and oxidizing to prepare the three-dimensional alumina fiber fabric reinforced oxide ceramic. The three-dimensional alumina fiber fabric reinforced oxide ceramic has the advantages of high bending strength, high modulus, good interlaminar shear strength and the like.

The invention belongs to the technical field of macromolecular materials, and in particular relates to a preparation method for biodegradable blocked copolyester. The preparation method comprises the following steps: carrying out esterification reaction between adipate and 1,4 butanediol in the presence of catalyst, wherein the reaction time is 3 to 5h, nitrogen is adopted for protection, the reaction pressure is between 0.1 and 0.8MPa and the reaction temperature is between 130 and 180 DEG C during a first stage; and the reaction time is 1.5 to 5h, the reaction pressure is between 0.3 and 0.6MPa and the reaction temperature is between 150 and 200 DEG C during a second stage so as to generate polybutylene adipate; and carrying out ester exchange reaction of dimethyl terephthalate (DMT) and 1,4 butanediol in the presence of catalyst, wherein the nitrogen is adopted for protection, the reaction time is 2 to 5h, the reaction pressure is between 0.1 and 0.7MPa and the reaction temperature is between 150 and 170 DEG C so as to generate polybutylene terephthalate (pbt); and mixing both prepolymers and carrying out melt copolycondensation reaction under negative pressure, wherein the vacuum degree is controlled to be between 0 and 200Pa, the reaction temperature is between 210 and 260 DEG C and the reaction time is 3 to 8h. The preparation method carries out esterification reaction and ester exchange reaction, and the esterification reaction has two stages so as to effectively reduce secondary reaction of 1,4 butanediol. A prepared product has a characteristic viscosity number above 1.2dl/g, a melting point controlled between 100 and 140 DEG C, a tensile strength between 18 and 37MPa and a breaking elongation ratio from 800 to 1,500 percent.

The invention discloses a preparation method of an ultrathin nano-lithium lanthanum zirconium oxygen all-solid-state electrolyte layer. The method includes: preparation of a nano-lithium lanthanum zirconium oxygen slurry; and film formation from the nano-lithium lanthanum zirconium oxygen slurry. The preparation process is simple, the preparation process has no need for a mold and pressure, the electrolyte layer shapes naturally, the operation is convenient, and the energy consumption is low. The raw materials are wide and easily available, the preparation process is controllable, and the repeatability is high. The solid electrolyte film prepared by the method has thickness up to 1 micrometer.

The invention belongs to the technical field of a constructional material, in particular to slag powder dry mortar which is mixed in large quantity with desulfuration plaster as an excitant. The slag powder dry mortar consists of cement, powdered slag, desulfuration plaster, lime, sodium sulfate, cellulose ether, emulsion powder and sand. By using the slag powder dry mortar, the solid waste, namely desulfuration plaster, is used efficiently as a resource. In addition, under the circumstance of not reducing the properties of mortar, the problem that the early strength of mortar is low because of large quantity of slag powder mixed. The slag powder dry mortar is applicable for plastering and masonry of ordinary buildings, and can meet the waterproof requirement.

The gas forming agent for safety belt pre-fastener consists of nitrocellulose 60-90 wt%, combustion improver 1-10 wt%, oxidant 1-20 wt% and adhesive 1-10 wt%. The combustion improver is one or several selected from boron powder and inflammable metal powder; the oxidant is one or several selected from nitrate, chlorate and perchlorate; and the adhesive is one or several selected from phenolic resin, shellac varnish, bone glue, cellulose-base polymer and its salt. The gas forming agent for safety belt pre-fastener has no combustion residue, high gas producing rate and excellent safety belt fastening performance.

The invention provides a red fluorescent gold/copper nanocluster alloy as well as a preparation method and an application thereof. Egg white is taken as a template and a stabilizer, and the red fluorescent gold/copper nanocluster alloy with uniform size dimension and good stability is prepared from gold/copper in certain mole ratio with a one-pot method. The method is simple to operate, and the raw materials are widely sourced and easy to obtain and has good repeatability; besides, the prepared red fluorescent gold/copper nanocluster alloy has good water solubility and high fluorescent stability, adopts a double-peak structure and can be used for detection of silver ions in a water system, biological cell imaging and the like.

The invention discloses an edible composition, comprising a probiotic culture. The probiotic culture is obtained by cultivating probiotics by using a culture medium. The edible composition disclosed by the invention has the functions of adjusting intestinal flora, regulating blood sugar level, reducing blood fat and improving the immunity.

The invention discloses a YAG fluorescent ceramic as well as a preparation method and application thereof. Light-emitting center ions of the YAG fluorescent ceramic comprise Ce<3+> and M capable of emitting red light/green light; the molecular formula is (Y1-xCex)3(Al1-yMy)5O12, wherein x is greater than or equal to 0.004 and is less than or equal to 0.5, and y is greater than 0 and is less than or equal to 0.5. The preparation method of the YAG fluorescent ceramic comprises the following steps: uniformly mixing powder of raw materials, molding to prepare biscuits and carrying out high-temperature solid-phase synthesis reaction sintering to prepare the YAG transparent ceramic. After rare earth-doped YAG transparent ceramic is encapsulated with a commercial blue light LED chip, high-qualityemitted light capable of simulating sunlight can be obtained; compared with the rare earth-doped YAG transparent ceramic prepared by a two-step method, the step of synthesizing YAG:Ce<3+>, M fluorescent powder is avoided in the reaction sintering method; the preparation method has the characteristics of simple process and low production cost.

The invention discloses a super-stretchable graphene electro-thermal film and a preparation method thereof. The electro-thermal film is formed through knitting graphene fibers with a spiral structure; the fibers not only have ultrahigh elongation at break, and can realize rapid response on a high temperature of 30-420 DEG C under safety voltage of 0.5-5V. The preparation method is simple and specifically comprises the following steps: after chemically reducing graphene oxide, carrying out heat treatment in a high-temperature furnace at 500-3000 DEG C to obtain a graphene film; after uniformly winding, obtaining graphene fibers; and knitting the graphene fibers to obtain the graphene electro-thermal film. The graphene electro-thermal film has ultrahigh heating speed and cooling speed, and ultrahigh temperature response; the working voltage is relatively low so that the graphene electro-thermal film can be used for human bodies and is used as human body heating cloth; and the graphene electro-thermal film has a stretchable property so that the graphene electro-thermal film can be adaptive to the movement of the human bodies, such as muscle stretching, in a utilization process, and furthermore, the graphene electro-thermal film can be widely applied as an intelligent electro-thermal material.

Production of sabadilla straw active carbon is carried out by washing sabadilla straw, crushing, carbonizing and activating. It has larger pore volume, excellent active carbon specific area and adsorptive ability.

The invention discloses a preparation method of a high-purity sphere-like nanometer AlN (aluminum nitride) particle. The preparation method comprises the following steps of (1) weighing an Al2O3 (aluminum oxide) powder, soluble inorganic salt and a water-soluble organic precursor according to a mass ratio, mixing, adding water, performing ball grinding, spraying and granulating, so as to obtain amicrometer spherical particle; (2) synthesizing the micrometer spherical particle by microwaves under the nitrogen atmosphere in two stages, wherein in the first stage, the room temperature is heatedto the temperature of 800 to 1200 DEG C at the heating speed of 0.1 to 5 DEG C/min, and the increased temperature is warmed; in the second stage, the temperature is increased to 1200 to 1800 DEG C atthe heating speed of 1 to 20 DEG C/min, and the increased temperature is warmed, so as to obtain the nanometer aluminum nitride particle containing trace carbon; (3) decarbonizing the nanometer aluminum nitride particle containing trace carbon under the CO2 (carbon dioxide) atmosphere, so as to obtain the high-purity sphere-like nanometer AlN particle. The preparation method has the advantages that the raw materials are wide and are easy to obtain, the equipment and technology are simpler, the cost is lower, and the preparation technology is especially suitable for industrialized production. The prepared AlN powder has the advantages that the purity is high, the particle size distribution range is broad, the specific surface area is high, and the like.

The invention belongs to the technical field of coatings and in particular relates to an epoxy resin-nano titanium interface chemical bonding anticorrosive coating and a preparation method thereof. Firstly, a nano titanium filler grafted with epoxy resin is easily fully dissolved and wetted with coating resin, and the nano titanium filler can be uniformly dispersed in the epoxy resin of the coating and can be cross-linked with the coating resin and a curing agent together, so that the epoxy resin-nano titanium interface chemical bonding anticorrosive coating is obtained; and secondly, the metal titanium particle size of the grafted epoxy resin is in a nano scale, the grafted epoxy resin has a huge specific surface area and a good surface nano effect and can form firm interface bonding force with resin in the coating, the defects and pores of the anticorrosive coating are greatly eliminated, the phenomena such as embrittlement cracking and underfilm corrosion occurring on the anticorrosive coating are avoided, and the corrosion resistance of the coating is improved. Finally, the nano titanium filler is wear-resistant, high in strength and high in thermal stability, so that the wear resistance, mechanical properties and heat resistance of the anticorrosive coating are obviously improved.

The invention discloses a preparation method of a zinc oxide nanorod with strong blue-violet light after being excited. According to the preparation method, a reaction system is composed of soluble zinc salt, alkali, amine, non-aqueous solvent alcohol or ketone, a dispersing agent and a surfactant at the same time; the zinc oxide nanorod is prepared by using a solvent thermal method, so that the nanorod is rich in clearance zinc among crystal lattices and has the advantages of short time consumption, good effect and controllability in nanorod morphology. The nanorod prepared by using the method has a strong blue-violet light emission characteristic, has excellent photocatalysis property as the nanorod is likely to generate photoproduction electron/cavity after being excited under a certain condition, and has tremendous application values.

The invention discloses an environment-friendly printing ink, which is prepared from the following raw materials in parts by weight: 15-25 parts of water-soluble acrylic modified resin, 15-20 parts of water-based polyamide resin, 30-40 parts of solvent, and 5-25 parts of pigment. 15 parts, 5-10 parts of soybean oil, 1-2 parts of thinner, 1-1.5 parts of thinner, 1-2 parts of defoamer, 5-10 parts of wear-resistant silicone oil, 2-2 parts of copolymer of vinyl chloride and vinyl acetate 4 parts, 1-2 parts of hollow glass microspheres, 0.5-1 part of pH stabilizer. The invention has reasonable formula, wide and easy-to-obtain raw materials, easy operation, and the prepared printing ink has high adhesion, and can even be used for printing on plastic films with low surface tension. It has the advantages of fast speed, good adhesion, excellent wear resistance, excellent heat resistance, high viscosity and no falling off, and the material used in the present invention is a benzene-free material, which has good environmental protection and broad market prospects.