255results about How to "Good oil retention" patented technology

The invention relates to a high oil absorption polyurethane foam which comprises the following components in parts by weight: 20 to 40 parts of isocyanate, 35 to 60 parts of polyol, 0.5 to 3 parts of catalyst, 0.5 to 3 parts of foam stabilizer, 5 to 10 parts of foaming agent, 2 to 10 parts of opening agent,5 to 20 parts of flame retardant, 5 to 15 parts of silicon rubber spherical micro powder and 0.5 to 2 parts of coupling agent. The preparation method comprises the following technology steps of weighing, prepolymerization, dispersing, polymerization foaming reaction, curing and peeling at room temperature and cutting. The high oil absorption polyurethane foam can be used for the absorption and recycle of various oil products (crude oil, engine oil, diesel fuel, gasoline, kerosene and the like) on water surfaces, ground or surfaces of other objects, and various oil soluble organic compounds (benzene, methylbenzene, dimethylbenzene, chloroform, nitrobenzene, chlorobenzene and the like). The invention has the advantages of simple technology and low cost, obviously improves the dispersing effect of the silicon rubber spherical micro powder in a polymerization system by using ultrasonic technique, and greatly increase the oil absorption quantity and oil absorption rate of the polyurethane foam by adding the silicon rubber spherical micro powder.

Disclosed is a cellooligosaccharide composition comprising, as the main ingredient, at least one cellooligosaccharide selected from the group consisting of cellobiose, cellotriose, cellotetraose, cellopentaose and cellohexaose, which is in the powdery form having an average L/D value of 3.0 or lower, a bulk density of 0.80 g/mL or lower and an angle of repose of 60° or lower.

A porous polyimide holder is prepared from pure polyimine powder through sieving, loading in mould, pressing, locking, sintering at 370-390 deg.C, keeping the temp for 5-40 mi, cooling and demoulding.

The invention provides preparation of dietary fiber from rice bran particles and application of the same in sausage, and belongs to the technical field of food processing. The preparation method comprises the following steps: taking defatted rice bran as a raw material, pulverizing, sieving, soaking in alkali liquor, allowing proteinase hydrolysis and amylase zymolysis, centrifuging, taking residues, dissolving the residues in 95% ethanol according to weight-volume ratio of 1:4, allow precipitating of dietary fiber, drying the precipitate after suction filtration to obtain the dietary fiber; and allowing superfine pulverization of the extracted dietary fiber to obtain the dietary fiber from rice bran particles. The superfine pulverization technology can help greatly improve physical and chemical properties of the dietary fiber from rice bran particles such as water retention, oil retention and expansive force, and improve taste and can be applied to the sausage by selecting the best particle size range and addition level. The dietary fiber made from rice bran particles has the advantages of richness in nutrition, low cost, innocuity and safety, and simple and convenient preparation method. The dietary fiber made from rice bran particles expands use scope of the defatted rice bran, provides the foundation for further research on properties of the dietary fiber from defatted rice bran, and promotes research and development of functional sausage.

The invention relates to a preparation method of an oil absorbing material, and the oil absorbing material is prepared by subjecting a basic material namely palm fibers to hydrophobic modification. The preparation method comprises the following steps: washing palm fibers, drying palm fibers, cutting the palm fibers into sections with a length of 0.5 to 5 cm; putting the palm fibers into a hydrophobic agent solution, soaking for 10 to 120 minutes at a temperature of 25 to 100 DEG C, taking out the palm fiber containing a hydrophobic agent, and quickly drying so as to obtain the modified oil absorbing material; wherein the hydrophobic agent is composed of paraffin, palm wax, or a mixture of paraffin and palm wax, the addition amount of the hydrophobic agent is 0.01 to 0.2 times of the weight of the palm fibers, the solvent is one or more of carbon tetrachloride, vinyl acetate, ethanol, and benzene, and the addition amount of the solvent is 20 to 800 times of the weight of the hydrophobic agent. Cheap and easily-available natural plant palm is taken as the raw material, the oil absorbing material is prepared by carrying out hydrophobic modification on the palm fibers, and compared with the oil absorbing materials prepared through chemical synthesis, the provided oil absorbing material has the advantages of low cost, biodegradability, and excellent oil absorbing performance.

The invention relates to a preparation method for a copolymethacrylate/polypropylene composite oil-absorbing material. The method comprises the following steps: adding a dispersant and deionized water into a polymerization kettle, adding a mixed solution and carrying out polymerization so as to obtain copolymethacrylate, wherein the dispersant is polyvinyl alcohol, and the mixed solution comprises 85 to 90% of alkyl methacrylate substances and styrene, 0.5% of benzoyl peroxide and 10 to 15% of beta-hydroxylethyl methacrylate; mixing copolymethacrylate with polypropylene master batch so as to obtain modified polypropylene master batch; and applying the modified polypropylene master batch to manufacturing of a melt-blown non-woven fabric so as to obtain the composite oil-absorbing material. To diesel oil No. 0, the oil absorption rate of the composite oil-absorbing material prepared in the invention is increased to 12.2 g/g from 11.2 g/g before compositing, the oil holdup rate is increased to 96.8% from 83.1% before compositing, and the water absorption rate is decreased to 6.6% from 18.2% before compositing.

A pulley for a continuously variable transmission and a method of creating an engineered surface on an outer surface of a pulley of a continuously variable transmission, with the engineered surface engaging with a belt or chain of the continuously variable transmission. The method comprising the steps of: determining an actual engineered roughness (Rpk) on the outer surface needed to obtain a predetermined friction between the engineered surface and the belt or chain; and etching microgrooves in at least a portion of the outer surface to create the engineered surface by employing a laser to etch the microgrooves, the microgrooves being formed to a depth that produces the actual engineered roughness (Rpk).

The invention discloses a baked-resistant mooncake stuffing pre-mixed powder and mooncake fruit jam stuffing and preparation methods thereof. The baked-resistant mooncake stuffing pre-mixed powder comprises, by mass percentage, 34.7-36.5% of oxidized hydroxypropyl starches, 26.9-28% of hydroxy propyl distarch phosphate, 32.6-33% of distarch phosphate, 0.7-1% of sodium polyacrylate, 1.1-1.2% of sodium carboxymethyl cellulose, 1.1% of sucrose fatty acid ester and 0.8-1% of molecular distillation monoglyceride. Stuffing prepared by the baked-resistant mooncake stuffing pre-mixed powder is good in taste, low in oil content, good in shape preserving and resistant to high-temperature baking, and overcomes the defect of high oil content of conventional mooncake stuffing. Besides, the baked-resistant mooncake stuffing pre-mixed powder is good in ageing resistance, can be stored in six months at room temperature, is simple in manufacturing process and low in cost and has wide market prospect.

The invention discloses a preparation method for an oil absorption material made of polypropylene non-woven cloth. The preparation method comprises the steps of treatment of the polypropylene non-woven cloth, preliminary grafting reaction, grafting reaction and final treatment so as to obtain the oil absorption material made of the polypropylene non-woven cloth. In the preliminary grafting reaction and the grafting reaction, a monomer drop addition method or a monomer infusion method is adopted. The process of the drop addition method is as follows: adding an oleophylic monomer dropwise in preliminary grafting reaction solution, and conducting the grafting reaction for 30 minutes to 120 minutes under constant-temperature agitation so as to obtain a graft polymerization product, wherein the oleophylic monomer belongs to methacrylic acid alkyl esters, and the adding amount of the oleophylic monomer is 3%-6% of the total mass of the preliminary grafting reaction solution. The process of the infusion method is as follows: taking out a product of the grafting reaction, putting the product into the oleophylic monomer, conducting constant-temperature agitation, and conducting the grafting reaction for 30 minutes to 120 minutes so as to obtain the graft polymerization product, wherein the oleophylic monomer belongs to methacrylic acid alkyl esters, and the adding amount of the oleophylic monomer is 3%-6% of the total mass of the preliminary grafting reaction solution.

The invention provides a preparation method of an SiO2 (Silicon Dioxide) aerogel modified polypropylene melt-blown nonwoven material. The preparation method comprises the following steps of (1) usingtetraethyl orthosilicate as a silicon source, preparing SiO2 aerogel by a sol-gel method, and performing crushing after the SiO2 aerogel is subjected to hydrophobic modification to obtain hydrophobicSiO2 aerogel powder; (2) mixing the hydrophobic SiO2 aerogel powder with polypropylene slices, and performing melting granulation to obtain an SiO2 aerogel/ polypropylene composite masterbatch; and (3) performing melt-blowing after the SiO2 aerogel/ polypropylene composite masterbatch and pure polypropylene are mixed to prepare the SiO2 aerogel modified polypropylene melt-blown nonwoven material.Compared with a polypropylene melt-blown nonwoven material before modification, the modified material has higher oil absorption performance and a higher oil holding rate. The SiO2 aerogel modified polypropylene melt-blown nonwoven material provided by the invention has good mechanical properties, low production cost and a simple process, is hopeful to realize scaled production, and can be used foremergency treatment of oil stain and oil spilling leakage.

The invention discloses a method for extracting peanut oil and fat and protein with an ultrasonic assisted aqueous enzymatic method, belonging to the technical field of fine processing of agricultural products and comprehensive utilization of by-products. The method comprises the following steps: after grinding blanched peanuts with a dry method, adding water to adjust alkali for ultrasonic-assisted extraction, and digesting after adjusting alkali at the second time; low-speed centrifuging to obtain free oil I and emulsion I, and high-speed centrifuging the emulsion I to obtain free oil II and emulsion II; causing the emulsion II to carry out complex enzyme breaking to obtain demulsification oil I, and causing stubborn emulsion to carry out ethanol-assisted breaking to obtain demulsification oil II; ultra-filtering and desalting protein fluid, and then spray drying to obtain peanut isolate protein powder. Finally, the extraction ratio of free oil is 83 percent, the extraction ratio of total oil is 92 percent, the protein recovery ratio is 91.6 percent, the peanut protein purity is 89 percent, and the breaking ratio of emulsion can achieve 97-98 percent. Compared with the traditional aqueous enzymatic method, the method has the advantages that the extraction ratio of free oil is increased, the dosage of enzyme is greatly reduced, the residual oil ratio of emulsion is significantly reduced, and meanwhile, the peanut protein powder with high purity and good functionality is obtained.

The invention discloses a preparation method of superhydrophobic melamine sponge modified by utilizing dopamine and carbon nanotubes. The preparation method is characterized in that the carbon nanotubes are combined with melamine sponge through oxidative autopolymerization of dopamine, so that oil-water selectivity of the melamine sponge is improved. The preparation method comprises the followingconcrete steps: firstly, combining the carbon nanotubes with dopamine by utilizing adhesion of dopamine, then coating a melamine sponge skeleton with the carbon nanotubes through the oxidative autopolymerization under alkaline conditions, and drying sponge to be constant weight, thus obtaining modified sponge with hydrophobic and lipophilic properties. The preparation method disclosed by the invention has the advantages that the carbon nanotubes are connected with the melamine sponge by virtue of chemical bonds, so that connection is tight and content is high; meanwhile, the structures of thecarbon nanotubes are not destroyed, so that sponge has stronger hydrophobic property and oil retaining capability, the obtained melamine sponge is light in weight and can be conveniently recycled, andefficient purification on floating oil on water surface can be realized.

The invention relates to a kenaf core/resin composite oil-absorption material and a preparation method thereof. The preparation method is characterized in that kenaf core waste in a textile industry is taken as a raw material to carry out graft copolymerization on oil-absorption resin and cellulose on the surfaces of kenaf core particles, so as to obtain a degradable kenaf core/resin composite high-oil-absorption resin. Compared with traditional inorganic oil-absorption materials and resin oil-absorption materials, the kenaf core/resin composite oil-absorption material and the preparation method have the advantages that the production cost can be substantially lowered, the waste of the textile industry is effectively utilized, and by utilizing a unique porous structure of a kenaf core, the oil absorption and keeping properties of the oil-absorption material are greatly improved; besides, after the kenaf core is subjected to graft copolymerization with the resin, the water absorbing capacity of the kenaf core is reduced, and the ratio of the oil absorbing capacity to the water absorbing capacity of the kenaf core is increased; the kenaf core simultaneously has the biodegradability of a straw and high water absorbing performance of the resin.

The invention discloses a carbon micron tube filling polymer oil-containing friction material for an ultrasonic motor and a preparation method thereof and particularly relates to an oil-containing friction material taking a carbon micron tube as an oil-containing carrier and applied to a traveling wave ultrasonic motor so as to solve the problems that stable operation of an ultrasonic motor is hard to guarantee by existing dry friction materials, the porous-structure friction material has bad elasticity and the oil content, elasticity modulus, hardness and contact deflection of the oil-containing friction material taking polyimide as a substrate are hard to adjust in a large range and the application of the ultrasonic motor is limited. The oil-containing friction material comprises the following components in percentage by mass: 45-80% of polymer substrate, 10-30% of friction regulator and 1-30% of carbon micron tube; and the preparation method comprises the following steps: 1) preparing a final mixture; 2) performing compression moulding to obtain a moulded object; 3) sintering the moulded object; 4) preparing a platy friction material; and 5) preparing the carbon micron tube filling polymer oil-containing friction material for the ultrasonic motor. The invention belongs to the field of oil-containing material preparation.

The invention discloses an extraction method of defatted wheat germ protein. The extraction method includes crushing low-temperature defatted wheat germs to make even wheat germ slurry, using an ultrasonic vibration classifying screen for wet screening, subjecting screening product to centrifugal settling separation and acid precipitation to obtain protein precipitate, and subjecting the protein precipitate to washing, modifying, sterilizing and drying to obtain the finished wheat germ protein. Compared with the prior art, the extraction method has the advantages that screening efficiency is high, meshes are less easy to block, power consumption is low and the like. By the extraction method, protein dissolution quantity can be increased, protein purity and yield can be increased, the protein is fine in dispersiblity, emulsibility, foamability, water retention and oil retention, the primary concentration of the protein can be achieved, and wheat germ dietary fiber, high-added-value product, can further be obtained from oversize product, and accordingly comprehensive utilization rate of the wheat germs is increased. In addition, the extraction method has low requirement for production equipment, is simple in process sequence and is convenient for industrial popularization.

The present invention relates to the field of high oil-absorbing resin preparation, and discloses a preparation method of an embedded immobilized microbial ball. The method comprises the steps of: (1) preparation of the immobilized microbial particles; (2) preparation of an acrylate copolymer emulsion; and (3) preparation of the embedded immobilized microbial ball. The present invention also discloses a preparation apparatus of the embedded immobilized microbial ball. The apparatus includes an extrusion section, an insulation transport section and a moulding section. The extrusion section comprises an extrusion sections housing, an advancing screw and a rotary motor; the insulation transport section includes a tubular type conveying channel and a heater; and the moulding section comprises a moulding section housing and a pair of reverse gears provided with hemispherical grooves. The embedded immobilized microbial ball prepared by the present invention has high oil suction rate and large oil absorption capacity, and can degrade the adsorbed oil; and microbes have good stability and long survival time. At the same time, the preparation apparatus of the present invention requires mild conditions in the preparation process, protects the survival rate of the microbes to the maximum; and the prepared product has high dimensional stability.

Relating to the high oil-absorption resin preparation field, the invention discloses a preparation method for a composite high oil-absorption resin. The method includes: (1) preparation of immobilized microbial microspheres: mixing modified mussel shell powder with a seed bacterial liquid, adding a sodium alginate solution into a bacteria adsorbing modified mussel shell powder solution, then injecting the mixed solution into a calcium chloride solution and conducting dispersion into balls, and conducting crosslinking to obtain immobilized microbial microspheres; (2) preparation of an acrylate copolymer emulsion: adding a methylacrylate monomer, styrene, an initiator and an emulsifier into water and conducting stirring emulsification; adding a crosslinking agent and a pore making agent into the emulsion to carry out reaction so as to obtain an acrylate copolymer emulsion; and (3) preparation of composite high oil-absorption resin: adding immobilized microbial microspheres, a coupling agent and cellulose into the acrylate copolymer emulsion, conducting stirring and then performing vacuum drying, thus obtaining the composite high oil-absorption resin. The composite high oil-absorption resin prepared by the method provided by the invention has fast oil absorption speed and large oil absorption capacity, and can carry out microbial degradation on oil.

The invention relates to an enteromorpha gel oil suction material and a preparation method thereof, the gel oil suction material comprises the following components: 60-70% of enteromorpha extract product, 10-15% of expandable graphite, 2-4% of ferric nitrate, 5-8% of cobalt nitrate, 8-12% of citric acid and 2-4% of ammoniacal liquor. According to the invention, enteromorpha with abundant output in sea is taken as a raw material, sugar alcohol, aliphatic acid and crude fiber extracted in enteromorpha are taken as base, and are mixed with expandable graphite by using a sol-gel method, the gel oil suction material can be recovered and used with high efficiency and environmental protection, the molecular structure of three-dimensional fiber mesh can greatly absorb oil molecule. The oil suction material has good oil adsorption performance, oil suction can reach saturation in 60-80 minutes under dynamic state, the saturation adsorption multiple is 40-60 which is higher than that of the current resin oil suction material and biomass oil suction material, and the enteromorpha gel oil suction material has the advantages of fast oil suction speed, good oil binding capacity and low cost.

A slide surface construction is formed of a large number of truncated hexagonal pyramid-shaped metal crystals in a slide surface, with the area rate A of said truncated hexagonal pyramid-shaped metal crystals being in a range of 40%<=A<=100%. A top face of each of the truncated hexagonal pyramid-shaped metal crystals has a plurality of flat face portions, with a step provided between adjacent ones of the flat face portions. Each of the truncated hexagonal pyramid-shaped metal crystals is a (hhh) oriented metal crystal which has a body-centered cubic structure and whose (hhh) plane (by Miller indices) is oriented toward the slide surface.