66results about How to "Reduce oxidative degradation" patented technology

The invention relates to the field of calligraphy and painting paper manufacturing, and specifically relates to a water-resisting breaking-resisting oxidation-resisting calligraphy and painting paper. The paper is prepared from raw materials and auxiliary materials through a pulping process and a paper making process. The raw materials comprise components of, by weight: 45-80 parts of bamboo pulp fiber, 10-30 parts of grass pulp fiber, 2-25 parts of wool pulp fiber, and 5-25 parts of viscose fiber. Each ton of the paper comprises auxiliary materials of, by weight: 0.5-2% of an antiseptic, and 3-15% of PVA. The calligraphy and painting paper provided by the invention has excellent water resistance, breaking resistance and oxidation resistance. The water-resisting and breaking-resisting functions are 10 times higher than a wet tensile strength index of a GB/T18739-2008 national standard of rice paper.

A fired product having a luminous function is manufactured by: adhering material-adapting glass frit to a surface of a ceramic material; adhering coating glass frit to the surface of the material-adapting glass frit after drying of the material-adapting glass frit; adhering luminous material particles having a particle size of 50 to 250 μm in one uniform layer to the coating glass frit layer before drying of the coating glass frit so that the upper portions of the luminous material particles are partly exposed from the coating glass frit; alternately stacking coating glass frit and luminous material particles several times; covering the topmost luminous material particles partly exposing from the coating glass frit by adhering coating glass frit; printing an image portion on the surface of the coating glass frit after drying of the coating glass frit; adhering adapting glass frit at a predetermined thickness to the coating glass frit having the printed image portion; uniformly adhering protecting glass frit particles having a large particle size to the surface of the adapting glass frit; and firing the adhered stack at high temperature, wherein the material-adapting glass frit has a coefficient of thermal expansion of an intermediate value between those of the ceramic material and the luminous material particles, the coating glass frit has a coefficient of thermal expansion substantially the same as that of the luminous material particles, and the adapting glass frit has a coefficient of thermal expansion of an intermediate value between those of the luminous material particles and the protecting glass frit particles having a large particle size. This fired product is used in an image forming part of an evacuation route guiding sign device as a fired product layer.

The invention discloses a microencapsulation preparation method of rhodococcus B7740 carotenoids. The method comprises the steps that (1) the rhodococcus carotenoids are extracted through an enzymic method; (2) rhodococcus B7740 carotenoid vegetable oil is prepared; (3) according to the mass ratio of chitosan to Arabic gum, two types of wall material powder are weighed, stirred in hot water to be dissolved and cooled; (4) according to the ratio of the masses of the wall material powder to the volume of the carotenoid vegetable oil, the carotenoid vegetable oil solution is absorbed and homogenized to obtain an o/w type lactescence; (5) a chitosan solution is added and continues to be stirred; (6) the mixture is cooled, curing agent glutaraldehyde is added, the PH is regulated through a NaOH solution, and the mixture continues to be stirred; (7) standing is carried out under the light shading condition, supernate is removed, sediments are washed, and vacuum freezing drying is carried out. The method is easy and convenient to implement, effectively reduces degradation of the carotenoids in the extraction process, reduces carotenoid degradation impurities in core materials and guarantees the physiological activity of carotenoid microcapsules, and the extraction ratio of the carotenoids reaches above 90%.

The invention discloses a high pressure hydrogenation naphthenic lubricating oil light stabilizer composition. The composition comprises, by mass, 80-90% of an ultraviolet light absorbent and a hindered amine light stabilizer 3,5-bis(1,1-dimethylethyl)-4-octadecyl hydroxybenzene phenylpropionate, and 10-20% of a tri[2,4-di-t-butylphenyl]phenyl phosphite chelating agent. The light stability of high pressure hydrogenation naphthenic lubricating oil can be obviously improved by adding 0.5-1% of the high pressure hydrogenation naphthenic lubricating oil light stabilizer composition to base oil ofa high pressure hydrogenation naphthenic lubricating oil composition.

A glycine metal chelate complex belongs to the technical field of amino acid and trace element complexing and comprises an auxiliary material and two or more glycine metal chelates, the metal chelates include calcium glycinate, magnesium glycinate, zinc glycinate, ferrous glycinate, iron glycinate, copper glycinate and manganese glycinate. Also disclosed is a preparation method of the glycine metal chelate complex, the prepared metal chelate complex can supplement trace elements in a balanced manner for the purpose of meeting the needs of a human body for elements such as calcium, magnesium, zinc, iron, copper and manganese, and the preparation method is simple and easy to perform.

The invention belongs to the technical field of analysis chemistry, specifically to a method for extracting ascorbic acid from vegetables and fruits by using a nitrogen protection micro wave-assisted extracting technology. The method comprises the following steps of: taking fresh vegetables and fruits, adding a weak acid solution with certain concentration in 1:6-1:12 g/ml times of volume as an extracting solvent, discharging the oxygen in the system via a nitrogen protecting device, extracting at a micro wave condition with certain power for a certain time, cooling, compensating weight, uniformly mixing, centrifuging, taking out supernatant fluid, diluting, analyzing and detecting the content of the ascorbic acid in the vegetables and fruits via high performance liquid chromatography. According to the method, nitrogen protection is combined with micro wave-assisted extraction to discharge the oxygen in the system, thus the oxidization of the ascorbic acid is reduced and the extracting rate is greatly improved. The method is combined with the high performance liquid chromatography for exactly detecting the content of the ascorbic acid in the vegetables and fruits, and is applicable to extracting and separating other components which are easy to oxidize by heating.

The invention relates to a method for preparing a high-performance irradiation cross-linking ultrahigh polyethylene extrusion plate. The method specifically comprises the following steps that: in the presence of a flow modifier, a sensitizer, a nucleating agent and antioxidant auxiliaries, an ultrahigh polyethylene plate is formed through melt extrusion, subjected to cross-linking reaction under high-performance X-ray irradiation and annealed in a vacuum drying oven so as to obtain the ultrahigh molecular weight polyethylene (UHMWPE) plate. The inherent performance stability of the polyethylene plate is ensured, and furthermore, the temperature resistance and mechanical properly of the polyethylene plate are improved.

The invention discloses a waterproof corrosion-resistant antiaging high-flexibility rich mineral paper and a preparation method thereof. The rich mineral paper is composed of the following raw materials in parts by weight: 15-20 parts of synthetic resin, 1-5 parts of EVA/EAA (ethylene-vinyl acetate/ethylene-acrylic acid) copolymer, 55-60 parts of inorganic powder, 5-10 parts of shielding agent, 1-4 parts of preservative, 0.1-1 part of antiaging agent and 1-10 parts of assistant. The preparation method comprises the following steps: weighing raw materials according to the formula proportion, uniformly mixing, sending into an 80-120-DEG C mixer, mixing for 5-15 minutes to activate the materials, mixing by a 100-240-DEG C Banbury mixer for 5-10 minutes, pressing the obtained material into a single screw/double screw extruder through a bi-wrist/bipyramid feeder, carrying out extrusion forming at 130-190 DEG C, cooling, granulating, introducing the master batch into a drying machine, drying until the water content is less than 0.3%, extruding by a 190-230-DEG C DEG C, calendering by a 40-70-DEG C calender, carrying out cooling to form, and trimming to obtain the rich mineral paper finished product. The rich mineral paper has the advantages of water resistance, corrosion resistance, aging resistance, long use period, high/low temperature resistance, simple production technique and very high popularization value.

The invention relates to an edaravone sodium chloride injection liquid and a preparation method thereof. 100 ml of the injection liquid comprises 20-40 mg of edaravone, 0.6-1.0 g of sodium chloride, 100-150 mg of propylene glycol, 2.5-3.5 g of vitamin C, and 0.3-1.0 g of sodium hydrogen carbonate, wherein the pH is adjusted to 3.5-5.0. The preparation process of the injection liquid comprises thesteps: liquid preparation, filtration, filling, capping, sterilization and lamp inspection; liquid preparation adopts a two-step preparation method, and the preparation process adopts low temperaturepreparation. The adopted method is simple to operate and low in cost, and the prepared edaravone sodium chloride injection liquid has good drug stability and fewer side effects, can effectively reducethe generation of impurities, has high patient compliance with medication and safety, can be used for improving neurological symptoms, daily living activities and function disorder caused by acute cerebral infarction, and can effectively prevent and treat brain injury.

The invention discloses a geogrid resistant to heat and humidity, which is composed of the following raw materials in parts by weight: zinc dihydrogen phosphate 4-5, phosphite 2-3, dimethyl diallyl chloride Ammonium 0.6‑1, polypropylene imine 10‑17, tert-butyl acrylate 6‑8, lithium aluminum hydride 0.1‑0.3, 4‑dimethylaminopyridine 0.3‑1, antioxidant 10100.4‑1, multi-walled carbon nanotubes 10-15, antioxidant 1680.6-1, high-density polyethylene 140-160, chlorinated paraffin 4-6, titanium dioxide 10-12, butyltin trioctoate 0.4-1, amino trimethylene phosphonic acid 0.1-0.2, di Phenylsilanediol 2‑3, calcium hexafluoroacetylacetonate 0.4‑1. The geogrid of the invention has good resistance to heat and humidity, good impermeability, and is not easy to corrode.

The invention discloses a fiber-modified antioxidant geogrid. The fiber-modified antioxidant geogrid comprises the following raw materials in parts by weight: 0.7 to 1 part of calcium fluoride, 3 to 4 parts of polyurethane, 10 to 17 parts of poly propyleneimine, 6 to 8 parts of tert-Butyl acrylate, 0.1 to 0.3 part of lithium aluminium hydride, 0.3 to 1 part of 4-dimethylamino pyridine, 0.4 to 1 part of an antioxidant 1010, 10 to 15 parts of multiwalled carbon nanotube, 0.6 to 1 part of an antioxidant 1680, 140 to 160 parts of high-density polyethylene, 2 to 3 parts of cellulose propionate, 1 to 2 parts of sodium carboxymethyl cellulose, 0.3 to 1 part of polydimethylsiloxane, 2 to 3 parts of ammonium zirconium hexafluoride, 0.1 to 0.2 part of pyromellitic dianhydride, 1 to 2 parts of tetrahydrofurfuryl alcohol, and 10 to 13 parts of calcined kaolin. According to the fiber-modified antioxidant geogrid, cellulose propionate and sodium carboxymethyl cellulose are added, so that the dispersity of fillers in a polymer can be effectively improved, and as a result, the intensity of a finished product can be improved.

The invention discloses a flame-retardant oxidation-resistant geogrid. The flame-retardant oxidation-resistant geogrid consists of the following raw materials in parts by weight: 1-2 parts of benzyltriphenylphosphonium chloride, 10-17 parts of polypropylenimine, 6-8 parts of tert-butyl acrylate, 0.1-0.3 part of lithium aluminium hydride, 0.3-1 part of 4-dimethylaminopyridine, 0.4-1 part of an antioxidant 1010, 10-15 parts of multi-walled carbon nano tubes, 0.6-1 part of an antioxidant 168, 140-160 parts of high density polyethylene, 2-4 parts of hydrous zinc borate, 5-7 parts of dibutyl maleate, 10-13 parts of fumed silica, 0.2-0.4 part of beta-hydroxyalkylamide, 1-2 parts of polyoxyethylene alkyl ether, 2-3 parts of ammonium polyphosphate, 1-2 parts of aluminium stearate, and 0.3-1 part of stearamide. The benzyltriphenylphosphonium chloride, the hydrous zinc borate and the like is added into the flame-retardant oxidation-resistant geogrid, and therefore, flame-retardant property of a finished product is improved effectively.

The invention discloses a low-VOC and low-migration polypropylene composite material and a preparation method thereof. The low-VOC and low-migration polypropylene composite material is prepared from 45 to 85 parts of polypropylene, 5 to 10 parts of polyethylene, 10 to 45 parts of inorganic filler, 0.05 to 0.1 part of vitamin E-type compound heat stabilizer and 0.05 to 0.1 part of titanium dioxide light stabilizer. The raw materials are mixed, extruded and granulated to be prepared into the low-VOC and low-migration polypropylene composite material. According to the low-VOC and low-migration polypropylene composite material disclosed by the invention, the green and environment-friendly aids of the vitamin E-type compound thermal stabilizer and the titanium dioxide light stabilizer are utilized to modify the polypropylene, and have small adding amount, good compatibility with a base material and no precipitation; thus, the prepared composite material has the characteristics of low VOC, low migration and the like, and can be applied to automotive trim materials of instrument boards, door boards, stand columns and the like of automobiles.

The invention discloses an antistatic high-cleanliness latex glove and a preparation method thereof. The anti-static waterproof coating is prepared from the following raw materials in parts by weight: 50 to 100 parts of latex, 20 to 40 parts of butyronitrile, 20 to 40 parts of polyvinyl chloride, 10 to 20 parts of sulfur, 10 to 20 parts of a conductive outer layer, 30 to 60 parts of a leather material, 10 to 20 parts of an anti-static PC (Polycarbonate) board, 20 to 40 parts of carbon black, 20 to 40 parts of mica powder, 5 to 10 parts of a de-foaming agent, 10 to 20 parts of wool fat, 10 to 20 parts of an accelerant, 10 to 20 parts of an anti-aging agent and 5 to 10 parts of a thickening agent. The preparation method comprises the following steps: S1, firstly, adding latex, butyronitrile, polyvinyl chloride, sulfur and a leather material into a stirrer, stirring and mixing according to fixed time, obtaining a first mixture after mixing is finished, meanwhile, putting the first mixture into a standing box, standing, and mixing, so as to obtain a second mixture; the antistatic high-cleanliness latex glove is good in antistatic capacity, long in service life, convenient to produce and convenient to popularize and use.