32results about How to "Change chemical structure" patented technology

The invention belongs to the chemical synthesis field and particularly relates to a soluble elemental sulfur and alicyclic olefin copolymer and a preparation method thereof. Elemental sulfur is heated in the nitrogen atmosphere under the condition that a catalyst exists or does not exist until the temperature of a reaction system is above a melting point of the elemental sulfur and below the transformation temperature, an alicyclic olefin monomer is added to be stirred and uniformly mixed after the elemental sulfur is completely molten, a polymerization reaction is performed, and the soluble elemental sulfur and alicyclic olefin copolymer is obtained. According to the soluble elemental sulfur and alicyclic olefin copolymer, a carbon chain is introduced into a sulfur chain and accordingly sulfur free radicals are eliminated, the effect of a chemical crosslinking point can be achieved due to the fact that unsaturated olefin comprises more than one double-bond, and accordingly the effect of the sulfur chain stabilization can be achieved.

The invention relates to high magnesium content boron-free glass fiber, which has high tensile strength and high elastic modulus, and is boron-free, fluorine-free and alkali-free glass fiber. The composition of the glass fiber adopts a four-element system of SiO2, Al2O3, CaO and MgO as the main. The glass fiber is characterized in that, based on the composition of the SiO2, the Al2O3, the CaO and the MgO, the CaO is substantially replaced by the MgO, and concurrently TiO2, Fe2O3 and other components are introduced and/or added, wherein the mass of the four main components of the SiO2, the Al2O3, the CaO and the MgO is more than 96.5% of the mass of the glass fiber, and the sum of the masses of the remaining secondary components including the TiO2, the Na2O, the K2O, the Fe2O3 and other inevitable impurities is 1.5-3.5% of the mass of the glass fiber. According to the present invention, the tensile strength and the elastic modulus of the glass fiber of the present invention are significantly higher than the tensile strength and the elastic modulus of the ordinary alkali-free glass fiber, and the glass fiber of the present invention has excellent acid resistance. According to the glass, high melting temperature and high fiber forming temperature are required, wherein the difference value between the fiber forming temperature and the liquid phase line temperature is more than 70 DEG C, and the condition of the industry production of the glass fiber is met.

A biodegradable high-molecular gel used as the carrier of composite medicine for controlling release of medicine features that its main chain is the biodegradable polyester and the polyester-polyether copolymer and carries functional lateral groups (carboxy, amino and hydroxy). Its preparing process includes such steps as preparing said main chain by polycondensing the monomer moleculae with more function groups, grafting to molecule containing unsaturated double bond to the functional lateral groups, grafting the molecule with function group to the rest of functional lateral groups, mixing medicine moleculae with the solution of grafted biodegradable high moleculae, and UV irradiating for cross linking to form gel.

The invention provides a method for improving adhesion property of an aluminum foil for an anode of a lithium ion battery. The method comprises the following steps: carrying out atmospheric pressure plasma treatment on the surface of the aluminum foil for the lithium ion battery before the anode of the lithium ion battery enters a coating machine, wherein technological parameters for plasma treatment are as follows: the plasma power is 0.6-1KW, the distance between the spray nozzle of a plasma spray gun and the surface of the aluminum foil is 2-15mm, and the tape-traveling speed of the coating machine is 6-15m/min; and coating the aluminum foil within 60 minutes after plasma treatment. The method is simple and convenient in operation and has the advantages of effectively improving the adhesion property between active substances and a substrate for the anode of the lithium ion battery, increasing the capacity of the lithium ion battery, ensuring the excellent adhesion property of the anode of the lithium ion battery on the premise of lowering the consumption of a bonding agent, and preventing environmental pollution, thus achieving the purpose of environmental conservation and being suitable for industrial application.

The invention discloses chalking-resistant spraying adhesive as well as a preparation method and an application method thereof, and aims to provide an adhesive having the advantages of environmental friendliness, high chalking resistance, and can be sprayed mechanically. The adhesive comprises 100 parts of graft by weight and 20-50 parts of tackifying resin by weight, wherein the graft comprises the following components by weight: 10-15 parts of SBS elastomer, 30-50 parts of cyclohexane, 10-18 parts of acetate ethyl ester, 10-15 parts of acetone, 8-15 parts of methyl methacrylate, 1-2 parts of butyl acrylate, 1-2 parts of acrylic acid, 0.5-1 part of an initiator and 0.5-1 part of a terminating agent; the tackifying resin comprises 5-10 parts of terpene-phenolic resin by weight, 10-15 parts of C5 petroleum resin by weight, 5-10 parts of pentaerythritol rosin tree by weight, 2-5 parts of hydrogenated rosin by weight and 1-2 parts of antioxidant by weight. The chalking-resistant spraying adhesive belongs to the technical field of adhesives.

The invention relates to wig shampoo which is used for clearing up wig products and prepared by using reagent materials, a preparation process thereof, and a method for clearing up the wig. The wig shampoo is prepared by the following raw materials in percentage by weight: 6 to 8 percent of ethoxylated lauryl alcohol sulfate, 6 to 9 percent of carboxymethyl cellulose, 0.1 to 0.4 percent of 2 percent sodium sulfate solution, 0.3 to 0.6 percent of 3 percent L-menthol solution, 0.5 to 2 percent of 3 percent high-grade fatty alcohol-polyoxyethylene ether solution, 0.1 to 0.4 percent of 25 percent sodium silicate solution and 80 to 86 percent of deionized water. The wig shampoo has the advantages of functions of antibiosis and ultraviolet resistance, no toxicity or simulation, high washing resistance and simple preparing process.

A pumpkin enzyme health wine and a preparation method thereof. The pumpkin enzyme health wine includes the following raw materials in parts by weight: 12-20 parts of pumpkin enzyme, 5-22 parts of wine, and 0.1-0.4 parts of kudzu flower extract. The pumpkin enzyme health-preserving wine of the present invention not only has a large number of functional components of pumpkin enzyme, but also has the mellow aroma of white wine, rich nutrition, good taste, rich in a large amount of pumpkin polysaccharides, carotenoids, amino acids and minerals, and can promote bone development. Promote human metabolism, anti-tumor, clear away heat and detoxify, and also have various regulatory effects on the immune system. By adding an appropriate amount of isoflavones, it can effectively reduce the absorption of alcohol in the gastrointestinal tract, promote the activity of alcohol dehydrogenase, and achieve protection. The purpose of the gastrointestinal tract damaged by long-term or heavy drinking has excellent health-preserving effects. It can not only play the role of hangover to a certain extent, but also solve the problems of easy drunkenness and discomfort after drinking.

The invention discloses sugarcane enzyme health wine and a preparation method thereof. The sugarcane enzyme health wine is prepared from the following raw materials in parts by weight: 12-20 parts of sugarcane enzymes, 5-22 parts of wine and 0.1-0.4 part of pueraria flower extract. According to the sugarcane enzyme health wine disclosed by the invention, due to organic integration of the sugarcane enzymes and health wine, the prepared sugarcane enzyme health wine has lots of functional components of the sugarcane enzymes, has mellow taste of liquor, is excellent in taste, safe and sanitary and has excellent health maintenance effects. The gastrointestinal tract damaged by long-term or heavy drinking is effectively protected, and the immunity of the organism is effectively improved due to the presence of the lots of functional components such as sugarcane polysaccharides, organic acids, vitamins, amino acids and the like. Meanwhile, due to the addition of a proper amount of isoflavone compounds, the absorption of the gastrointestinal tract on alcohol is effectively reduced, the activity of ethanol dehydrogenase is promoted, the effect of dispelling the effects of alcohol is achieved to a great degree, and the problem that a person is easily drunk and feels uncomfortable after drinking the wine is solved.

The invention provides a free radical initiator, a preparation method thereof, a light-emitting free radical polymer and a preparation method of the light-emitting free radical polymer. The structural formula of the free radical initiator is shown in the description. The preparation method of the free radical initiator comprises the following steps: reacting a first compound with 3, 4-dihydro-2H-pyran to obtain a second compound, and then reacting the second compound with a trityl compound to obtain a third compound; and carrying out THP protection removal reaction on the third compound to obtain a fourth compound, and carrying out dehydrogenation reaction on the fourth compound to obtain the free radical initiator. The polymer chain of the light-emittingfree radical polymer at least one free radical group. The preparation method of the light-emitting free radical polymer comprises the following step: reacting the free radical initiator with a monomeric compound to obtain the light-emitting free radical polymer with the temperature stimulation response characteristic. According to the free radical initiator provided by the invention, the aggregation-induced fluorescence quenching effect is inhibited by controlling the chain length of the polymer, and the critical response temperature of luminescence can be regulated and controlled by changing the chemical structure of the polymer chain.

The invention discloses a method for separating and extracting soil humus, relates to a method for separating and extracting humus, and belongs to the field of humus biochemical research. The invention aims to solve the technical problems of hydrolysis and oxidation of part of organic matters caused by existing humus separation and extraction. The extraction method comprises the following steps: dissolving a soil sample in a mixed solution of acetone and hydrochloric acid, filtering, diluting filtrate by using distilled water to obtain humic acid precipitate, titrating supernate by using a sodium hydroxide solution to obtain humin precipitate, then respectively purifying the humic acid and the humin, and finally freeze-drying to obtain dry substances of the humic acid and the humin. According to the method, soil humic acid and humin are separated and extracted successively by adopting distilled water dilution precipitation and sodium hydroxide titration methods for the first time, and changes of chemical structures and characters of humus are avoided to the greatest extent. A low-concentration sodium hydroxide solution is adopted to dissolve humic acid precipitate, and purification is performed through cation exchange resin, so that the original molecular structure and chemical composition of humic acid are retained to the maximum extent.

The invention discloses a method for controlling shrimp blackening. The method comprises the steps: firstly, cleaning and drying the shrimps; putting the cleaned and dried shrimps into a low-temperature plasma device to be treated to change polyphenol oxidase chemical structures of the shrimps; then dipping into dedicated shrimp preservative for 3 to 10 minutes; taking the shrimps out to be storedunder the condition of 0 to 4 DEG C. The shrimps sequentially pass the low-temperature plasma body through a conveying belt, a speed of the conveying belt is 2 to 5cm/s, the channel length in the low-temperature plasma device is 20 to 40cm, and the shrimp preservative is a biological preservative prepared from sodium alginate with a concentration as 20 to 30g/L. The method has the advantages of low cost, safety in use, good effect, ability in effectively inhibiting enzyme activity and ability in improving shrimp preservation quality.

The invention belongs to the technical field of substance detection, particularly relates to an ionization device and application thereof, and aims to solve the problems that the analysis ionization efficiency of the existing ion source mainly depends on the property state of an object to be detected, ions need to be improved in a space focusing and transmission system, the repeatability has problems and accurate quantification is difficult, the matrix effect is difficult to ignore and a powdery sample cannot be analyzed due to high-speed airflow needs to be used. The provided ionization device comprises a sample transmission pipe, a flow meter and an air exhaust assembly, the sample transmission pipe is connected with the flow meter, and the flow meter is connected with the air exhaust assembly. As for a direct ion source technology, due to the fact that the solvation effect and rich ionization ways can be effectively avoided, the chemical structure of a sample can be changed to improve the ionization efficiency.