36results about How to "Wide variety of sources" patented technology

The invention provides a preparation method of a high-stability silicon-carbon composite material for a lithium ion battery. The method comprises the following steps: (1) carrying out mechanical shaping pretreatment on graphite and nano silicon powder to obtain a silicon-carbon compound; (2) carrying out mechanical mixing on the silicon-carbon compound and a coating agent material under the protection of inert gas, adding the obtained mixture into coating equipment, and carrying out coating and pre-carbonization under the protection of inert gas to obtain a precursor of the silicon-carbon composite material; and (3) carbonizing the precursor obtained in the step (2) in a carbonization furnace, and carrying out crushing, sieving and demagnetizing treatment on the carbonized silicon-carbon material to finally obtain the silicon-carbon composite negative electrode material for the lithium ion battery. According to the invention, the silicon-carbon composite negative electrode material isprepared in an in-situ composite form, silicon and graphite are fused together, and the spherical-like structure has the characteristics of improving the tap density of the material, solving the problems of low conductivity and large volume expansion of silicon in the charging and discharging process, and greatly improving the stability of the material.

The invention discloses a skin repair solution containing stem cell extract and a preparation method thereof. The skin repair solution is prepared from the following raw materials in parts by weight:1.6 to 3.6 parts of stem cell extract, 0.6 to 1.3 parts of sodium hyaluronate, 15.3 to 19.8 parts of mannitol, 3.2 to 4.4 parts of niacinamide, 2.1 to 3.7 parts of betaine, 4.8 to 8.5 parts of oligopeptide, 2.2 to 3.4 parts of polydimethylsiloxane, 0.4 to 0.9 part of azone, and 5 to 7.5 parts of spica prunellae. The skin repair solution has the advantages that the sources of the raw materials arewide; by adopting the active polypeptide and the stem cell extract, and compounding with other components, the multiple components can reach the synergistic function under the mutual action; the prepared finished product has obvious repair effect on the skin, any irritation feel and adverse reaction are avoided in the use process, the experience feel is good in use, and the application prospect isbroad.

The invention discloses a novel synthesis method of alpha-carbonyl acid ester. The method comprises the following steps: carrying out chlorination reaction on an alpha-methylene-containing nitrile compound and chlorine to obtain dichloronitrile, reacting the dichloronitrile product in a sulfuric acid and water system to obtain formyl cyanide, then acquiring an imino sulfate compound in the same reaction system, and finally performing esterification to obtain the target product. The adopted reaction raw materials are wide in sources and low in price, highly toxic solid sodium cyanide can be prevented from being used in the prior art, the method is environmentally friendly, and the method is easy to operate, mild in condition and easy to industrialize.

The invention relates to a preparation method of a chitosan-based spherical negative lithium ion battery carbon electrode. The preparation method comprises the following steps: taking chitosan as a raw material, dissolving the chitosan in a certain proportion of hydrochloric acid solution, stirring at a room temperature for 3 hours, then heating to a certain temperature, stirring for several hours, adding a uniformly mixed solution into a polytetrafluoroethylene-lined stainless steel reaction kettle, sealing, then reacting at the temperature of 120-200 DEG C for 5-12 hours, naturally cooling to a room temperature, filtering, washing and drying to obtain hydrothermal charcoal with the particle size distribution of 1-6 microns, then performing high-temperature carbonization in an inert atmosphere to obtain the nitrogen-containing spherical negative carbon electrode. By the preparation method, the raw material is cheap and easy to obtain, a synthesis technology is simple and easy to implement, a negative electrode material is stable and non-toxic in air, is used as the negative electrode material of a lithium ion battery and shows superior electrochemical performance.

The invention belongs to the field of research and development of industrial circulating water treatment agents, and particularly relates to an environment-friendly fluorescent tracing scale inhibitorand a preparation method thereof. The scale inhibitor obtained by the method can be applied to the industries of chemical engineering, electric power, metallurgy and the like. The preparation methodof the environment-friendly fluorescent tracing scale inhibitor comprises the following steps: firstly, taking maleic anhydride and urea as raw materials, heating in an acidic environment to carry outpolymerization reaction to generate polysuccinimide, mixing tyrosine and polysuccinimide in an alkaline environment, and heating to carry out hydrolysis reaction, thereby obtaining the environment-friendly fluorescent tracing scale inhibitor after the reaction is finished. According to the method, green and environment-friendly degradable fluorescent monomer tyrosine is selected, a large amount of tyrosine exists in organisms and is wide in source, cheap and easy to obtain, and the structure of tyrosine contains scale inhibition groups such as carboxyl and amino. When the fluorescent tracingscale inhibitor is applied to construction of the fluorescent tracing scale inhibitor, the green and environment-friendly properties of the scale inhibitor are guaranteed while the fluorescent tracingfunction is achieved, and the scale inhibition performance of a material can be possibly improved.

The invention discloses a product similar to cigarette without nicotine and a preparation method thereof. The product similar to cigarette without nicotine consists of a filter tip and a cigarette stick; the fillings of the cigarette stick consist of plant fibre, tea, taste seasonings and glycerol; the components of the plant fibre, the tea, the taste seasonings and the glycerol counted in a weight percentage are as follows: 10 to 80 percent of the plant fibre, 0 to 20 portions of the tea; 0 to 80 percent of the taste seasonings as well as 1 to 2 percent of the glycerol. The preparation method of the product similar to cigarette without nicotine is as follows: the plant fibre is aired firstly and is processed into filaments; then the tea is cut into filaments and is uniformly mixed with the taste seasonings and the glycerol; then the mixture is manufactured into the product by a cigarette device.