34results about How to "The operation process is simple and controllable" patented technology

The invention discloses a high-strength viscose fiber and a production method thereof, which are characterized in that the viscose fiber is formed by mixing bacterial cellulose and viscose spinning solution, wherein the content of the bacterial cellulose in the viscose fiber is 1 to 10 percent. The production method comprises the following steps: the flake bacterial cellulose is pre-processed, and then the flake bacterial cellulose after the preprocessing is smashed with a ball milling method to obtain a micro nano-grade bacterial cellulose powder; the bacterial cellulose powder is added into the viscose spinning solution to be uniformly scattered and defoamed to obtain a spinning solution; and the spinning solution is made into a high-strength viscose fiber. The content of the bacterial cellulose in the viscose fiber is 1 to 10 percent. The viscose fiber which is prepared with the production method has high strength, small shrinkage and good elasticity, can be blended and interwoven with cotton, wool and other synthesized fibers to be used for the fields such as top-grade costume fabric and industrial textiles, and the like.

The invention provides a preparation method of an alpha-Al2O3/mullite multiphase ceramic fiber. The preparation method comprises the following steps: mixing aluminum powder, aluminum salt and water, performing heating reflux at 110-200 DEG C till the aluminum powder reacts completely to form aluminum collosol, mixing the aluminum collosol prepared by the above method, silicasol, nano particle dispersing liquid and a spin finish aid, and performing aging, concentration, spinning and calcining to form the alpha-Al2O3/mullite multiphase ceramic fiber, wherein the nano particle dispersing liquid is one or a combination of more than two of alpha-Al2O3 dispersing liquid, gamma-Al2O3 dispersing liquid or alpha-Fe2O3 dispersing liquid. A formation temperature difference of alpha-Al2O3 and a mullite crystal phase in the ceramic fiber is reduced by adding nano particles; and the dense ceramic fiber that is high in length, excellent in mechanical property and high in purity can be prepared at a lower temperature.

The invention discloses a preparation method of spontaneous heating cellulosic fibers and spontaneous heating cellulosic fibers prepared by adopting the method. The preparation method comprises the steps of preparing a spinning solution and preparing spontaneous heating cellulosic fibers. The spontaneous heating cellulosic fibers comprise 0.5 to 3 percent by weight of capsaicine and are uniformlydistributed in a porous structure inside the cellulosic fibers, and an aperture is distributed in a range of 20 to 100 nm. The spontaneous heating cellulosic fibers have a good heating efficacy and stability, after the spontaneous heating cellulosic fibers are washed by 1 to 3 percent by weight of sodium dodecyl sulfate solution for 10 to 70 times, 95 percent or more of heating function performance can still be maintained, and the spontaneous heating cellulosic fibers can be widely applied to products such as underwears, home textiles, socks.

The invention discloses high-purity N-doped TiO2 full-mesoporous nanofiber. Main composition elements of the nanofiber are Ti, O and N, wherein main expression forms of the elements Ti and O in the nanofiber are TiO2 and N is a doping element. The nanofiber has a porous structure, pores of which contain mesopores. The nanofiber disclosed in the invention has advantages of simple process, convenience in production and good quality stability of the product.

The invention discloses an application of N-doped TiO2 nano fiber in a high-efficiency visible light photocatalyst, the main composition elements of the nano fiber is Ti, O and N, wherein, a main expression form of Ti and O elements in nano fiber is TiO2, N is a doping element; the nano fiber has a porous structure, and the pore of the porous structure comprises meso pore. The N-doped TiO2 nano fiber has the advantages of high catalytic activity, low application cost, good repetition usage performance of the catalyst, and regeneration and reuse.

The invention discloses a silver-based multi-layer composite electrical contact material and a preparation method thereof. The silver-based multi-layer composite electrical contact material comprisesa working layer, an intermediate layer, a welding layer and a soldering layer, wherein the intermediate layer is arranged between the working layer and the welding layer, a pure silver or silver alloysoldering layer is arranged between the intermediate layer and the working layer, the material of the welding layer is cheap metal iron or iron-based alloy, the material of the intermediate layer ischeap metal copper or copper alloy, and the material of the working layer is one of AgMeO systems. The material is prepared by directional combination rolling, continuous diffusion annealing and coldrolling. Due to the presence of Cu and Fe, a large amount of silver can be saved, and the cost is substantially reduced; and the operation process has the advantages of good material consistency, highpracticability and the like and is simple and controllable, is suitable for mass production, the prepared silver-based multi-layer composite electrical contact material has the advantages of high conductivity, favorable bonding strength and weldability and can be widely applied to industry of a temperature controller, a contact is attractive in positioning, and the influence on thermal deformation of a welding piece is small.

The invention discloses a preparation method of fluorescent nanofiber film based on acrylic based emulsion, which specifically comprises: mixing rhodamine B and acrylic monomer by a mass ratio of 1:100-1:1000 under the action of emulgator, and preparing the fluorescent acrylic acid composite latex by an emulsion polymerization method; dissolving the polyvinyl alcohol with molecular weight of 70000-150000 in the deionized water to prepare a polyvinyl alcohol aqueous solution with concentration of 5-10wt%, mixing the polyvinyl alcohol aqueous solution with the fluorescent acrylic emulsion in proportion, and obtaining a fluorescent nanofiber film through an electrostatic spinning process at fixed temperature and humidity; the method promotes the dispersion of the fluorescent small molecules,inhibits the aggregation induction quenching effect of the fluorescent molecules under a solid state, improves the fluorescence intensity of the fluorescent small molecules, enables the prepared fiberfilm to emit strong fluorescence, does not use any organic solvent in the spinning process and has no harm to the environment.

The invention discloses a method of regulating and controlling density of a SiC nano array, which includes following steps: 1) preparation of a precursor and a substrate; 2) catalyst deposition: depositing a catalyst layer on the surface of a substrate; and 3) sintering: sintering the substrate deposited with the catalyst layer and the precursor under a sintering atmosphere, so that the precursor is pyrolyzed on the surface of the substrate to form the SiC nano array. The preparation method is simple in process, is convenient to carry out, is beneficial to scale enlargement, is good in safety, is good in product quality stability and is stable in product performance.

The invention relates to a method for preparation of a silver antimony telluride thermoelectric material by combining low temperature solid phase reaction with hot pressing process. The method comprises the steps of: 1) ingredient compounding: according to the stoichiometric ratio of each element in the chemical formula AgSbTe2+x, weighing elemental silver, elemental tellurium and elemental antimony as raw materials, wherein x is 0-0.02; 2) briquetting sealing; 3) solid phase reaction: raising the temperature of the vacuum-tight block obtained in step 2) to a reaction temperature of 390-450DEG C, and conducting heat preservation for 6-12h to obtain a single phase silver antimony telluride ingot body or approximate single phase silver antimony telluride ingot body; 4) hot-pressing: grinding the obtained ingot and then performing hot pressed sintering, thus obtaining the high density silver antimony telluride thermoelectric material. The method has the characteristics of low reaction temperature, simple and controllable process, low preparation cost, and the prepared silver antimony telluride block material has the advantages of high density, high purity, good repeatability and excellent thermoelectric properties.

The present invention relates to microcrystal glass top plate as one kind of building member and its production process and application. The production process includes the first sintering of the mixture of quartzite, limestone, etc. to form granular glass material; spreading the granular glass material inside one shaped frame and the second sintering to form the semi-finished microcrystal glass member; the third sintering of the cooled member inside one crystallizing furnace at 1110-1140 deg.c and temperature variation within 10 deg.c for 50-70 min; and polishing, grinding and shaping. The production process can form top plate with compact structure, no bubble, high wear resistance, easy trimming, good appearance and texture, and is easy to control.

The invention researches a rapid propagation method for rosemary suspension cell culture. The rapid propagation method comprises the steps of obtaining germfree seedlings, inducing calluses, culturing and optimizing suspension cells, regenerating plants and the like. Rosemary suspension cells prepared by the rapid propagation method are high in proliferation rate, short in growth period and high in secondary metabolite, and are favorable for development and utilization of medicinal components of rosemary.