43results about How to "Low production and preparation costs" patented technology

The invention relates to a gas diffusion layer, a preparation method thereof and a fuel cell. The gas diffusion layer comprises a fiber framework layer and a porous layer which are stacked, wherein the porous layer comprises a breathable material and a water guide material which are distributed at an interval. According to the gas diffusion layer provided by the invention, the fiber material is used as a framework layer support, the breathable material and the water guide material which are distributed on the plane in a staggered manner are used as the porous layer, the bipolar plate design can be synchronized for customized development, the production process is simple, customized development production matched with the shape of a bipolar plate flow field can be realized, the process development time is shortened, the production and preparation cost is saved, and the problems of membrane electrode flooding, non-uniform reaction gas transmission, large gas resistance of the fuel cell and the like are solved.

A preparing method of a sintered silicon carbide porous material is disclosed. The method includes 1) a step of processing a main material into a pulp finished product, with the main material comprising a SiC granule material and a B4C granule material that is adopted as a sintering auxiliary, 2) a step of adding an auxiliary material into the pulp finished product prepared in the step 1) to prepare pulp before casting and stirring during addition, with the auxiliary material comprising acrylamide, methylenebisacrylamide and ammonium polyacrylate, 3) a step of performing mold casting, namely a step of adding ammonium persulfate into the pulp before casting, fully stirring, performing mold casting, and demolding to obtain a blank, and 4) a step of dewatering, degreasing and sintering. The SiC granule material having a small particle size is adopted as a gel main material and the B4C granule material having a large particle size is adopted as the sintering auxiliary and a skeleton material, thus achieving preparation of high-quality silicon carbide gel.

The invention relates to a preparation method of a dispersible graphene nano-composite particle. The dispersible graphene nano-composite particle is obtained by spray drying granulation of a raw material which is an aqueous dispersion containing a metal salt and graphene oxide at 100-400 DEG C. The metal salt is one of or a mixture containing two or more of metal formate, metal acetate, acetylacetone metal salt, ammonium molybdate / tungstate and metal nitrate. The dispersible graphene nano-composite particle prepared by the method has a uniform particle size, has a good dispersibility stabilityin lubricating oil, has a significant lubricating oil tribology performance improving performance, a small friction coefficient and a small wear scar diameter when used as a lubricating oil additive,and is a lubricating oil anti-wear and anti-friction agent with excellent performances.

The invention discloses an environment-friendly wooden fireproof door and a preparation method thereof, and relates to the technical field of fireproof doors. The environment-friendly wooden fireproof door comprises a door body and fireproof filler, and is characterized in that the door body comprises a rectangular frame body, a front wooden door plate and a rear wooden door plate; and the fireproof filler comprises the following components in 100 parts by weight: 50-70 parts of a base material, 10-20 parts of a flame retardant, 10-30 parts of a refractory material, 5-10 parts of a filler and 5-10 parts of an auxiliary agent. According to the invention, the material cost for preparing the wooden fireproof door is low, the equipment cost for preparing the wooden fireproof door is low, part of building waste is applied, the production and preparation cost is reduced, the waste of resources is reduced, the environmental protection is realized, the strength and the fireproof performance of the wooden protective door can be adjusted according to actual requirements, and the wooden protective door can be customized, so that the prepared wooden protective door is suitable for different places, and the practicability is improved.

The invention discloses a preparation method of pressureless-sintered silicon carbide gel. The preparation method comprises the following steps: 1) treating a main material including SiC particles and B4C particles into a finished thick liquid product, wherein the B4C particles are taken as a sintering aid, the particle size of each SiC particle is no more than 0.8 mum and the particle size of each B4C particle is 3.2 mum; 2) adding auxiliary materials into the finished thick liquid product obtained in the step 1) to prepare a thick liquid before casting while performing stirring, wherein the auxiliary materials comprise acrylamide, N,N'-methylenebisacrylamide and ammonium polyacrylate; 3) performing die casting, adding ammonium persulfate in the thick liquid before casting, performing uniform stirring and secondary die casting, and performing demoulding to prepare a blank; and 4) performing dehydration, degreasing and sintering. In the scheme, SiC particles with relatively small particle size are taken as a main gel material and B4C particles with relatively large particle size are taken as a sintering auxiliary agent and a framework material, thereby preparing the silicon carbide gel with high quality.

The invention discloses a special silicon-containing carbon-based organic fertilizer for rice in saline-alkaline soil. The organic fertilizer comprises 1-20 wt% of a silicon substance, 10-30 wt% of human and animal manure, 1-15 wt% of distiller's grains, 5-15 wt% of mushroom residues, 5-20 wt% of crops straws, 15-30 wt% of river pond sludge and 20-60 wt% of biochar; and the silicon substance is prepared by the following steps: taking wollastonite, carbonized coal briquette residues or kiln ash residues in industrial wastes; performing ball-milling crushing by using a grinding machine to form apowder, immersing the powder in a water pool for 12-20 h, and replacing water one time every 4 h; and pumping out the water, and drying the powder. The biochar added to a traditional organic fertilizer is made by carbonizing organic matters such as dry branches and fallen leaves, human and animal manure and the like, has the similar pore structure characteristics to charcoal, and can absorb and store the fertility of the organic fertilizer after the fertilizer is applied, so long-lasting fertility is provided for crops, and wastes caused by limited absorption quantity of the plants and the rapid dissolution and diffusion of the organic fertilizer after the organic fertilizer is applied to land are avoided.

The invention discloses the application of a high-temperature-resistant Pleurotus ergotitis in the production of ergothioneine. The high-temperature-resistant Pleurotus urticaria was preserved in the General Microbiology Center of China Microbiological Culture Collection Management Committee on October 18, 2018, and the preservation number is For CGMCC:16378. The application of the high-temperature-resistant Pleurotus ergothioneine in the production of ergothioneine has the following advantages: 1, the high-temperature-resistant Pleurotus ergothioneine shortens the fermentation time of ergothioneine; 2, the cultivation temperature of the ergothioneine fermentation production process can reach up to 32 ℃, can reduce the energy consumption brought by the cultivation and cooling, and reduce the production cost; 3. The yield of ergothioneine is higher, which reduces the production and preparation cost of ergothioneine, and lays a solid foundation for the industrial production and commercial application of ergothioneine The basics.

The invention discloses an application of hydroxyethyl starch to preparation of a wound dressing. The wound dressing is prepared from hydroxyethyl starch and a dressing carrier, wherein the hydroxyethyl starch is a product prepared by substituting corn starch containing a branch-chain with ethoxy, wherein the molecular weight is 10,000Da to 70,000Da. The wound dressing prepared with the hydroxyethyl starch has larger specific surface area, high porosity, and can be used for absorbing seepage on the wound; wound dressing can be combined through a coordination bond after absorbing water to builda network-staggered structure with extremely high crosslink degree, so that high viscosity and flexibility are achieved; a moist and micro-acid environment can be provided, local sterilizing performance is enhanced, anti-bacteria effect is durable, infection rate is lowered, the dosage of the antibiotic is lowered, the healing of the wound is facilitated, postoperative tissue adhesion is avoided;the hydroxyethyl starch has high biocompatibility, can be degraded effectively in a living body, is wide in application range, is low in production cost, and can be used for lowering medical cost.

The invention relates to a preparation method of a humidity controlling material. Massive gathered river alluvial sediments and meerschaum wide in distribution are raw materials and react under saturated vapor pressure of a hydrothermal kettle, an original porous structure of most of the meerschaum is reserved, needle-shaped tobermorite is generated, a composite porous material is formed, and the air humidity in a room can be adjusted to keep 40-70%. The humidity controlling material comprises the newly generated tobermorite and the meerschaum modified river alluvial sediments, the river alluvial sediments and hydrated lime are mixed and serve as the base material, the graded composite technology is adopted, and the superior building humidity controlling material is prepared. The indoor humidity of a bedroom, an office, a warehouse workshop, a museum and the like can be effectively adjusted and keeps within the needed proper humidity range. The humidity controlling material is a novel inorganic material with the self-humidity controlling characteristic and can replace an existing humidity controlling system.

The invention relates to a preparation method of a flexible composite lithium metal film and a lithium ion battery. The flexible composite lithium metal film comprises the following components in weight percentage: 3% to 30% of a polymer, 1% to 30% of a conductive agent, and a metal Lithium and / or lithium alloys 40%~96%. Compared with simple metal lithium foils, the flexible composite lithium metal thin film provided by the present invention has a simple preparation process, greatly improved mechanical properties, and has good processing performance. The present invention also provides a lithium-ion battery comprising the flexible composite lithium metal film, the first coulombic efficiency and cycle have been significantly improved by introducing the flexible composite lithium metal film, and the battery has the advantages of low cost, safety and high production efficiency High-grade features, and in the process of introducing the film, no additional introduction equipment is required, the production and preparation costs are saved, the safety performance of the whole process is high, and it is suitable for industrial production.