92results about How to "Little degree of degradation" patented technology

The invention discloses a waterproof nanometer aqueous coating. The coating comprises, by weight, 7 parts of nanometer magnesium dioxide, 5 parts of nanometer titanium dioxide, 6 parts of nanometer alumina, 6 parts of nanometer silica, 8 parts of nanometer ferrum dioxide, 8 parts of nanometer copper dioxide, 8 parts of nanometer tin dioxide, 8 parts of nanometer zinc dioxide, 8 parts of sodium dioxide, 8 parts of active carbon, 5 parts of a pure acrylic copolymer emulsion, 5 parts of rutile titanium dioxide, 3 parts of diatomite, 5 parts of aluminum silicate, 4 parts of gypsum powder, 1 part of a thickener, 1 part of a dispersant, 0.5 parts of ethanol modified polyurea, 0.2 parts of propylene glycol, 0.3 parts of glycerin, 2 parts of polyurethane and 2 parts of isopropanol. All nanometer materials especially added in the invention reduce agglomeration reactions and make the coating have an efficient lasting antibacterial property. The coating has the advantages of small degradation degree, stability, long service life, safety, environmental protection, adsorption of toxic gases, and sound insulation.

The invention relates to a preparation method of hydrogenated C9 petroleum resin, which is characterized by comprising the following steps of: (1) preparation of supported noble metal hydrogenated catalyst: preparing by using a coating method, selecting noble metal palladium and platinum and transition metal cobalt or nickel as metal active components, preparing a spherical alumina supporter, then coating the active components of palladium and platinum and transition metal on the alumina supporter, and activating to obtain a hydrogenated catalyst; (2) selective hydrogenation: desulfurizing and denitrifying; (3) high pressure hydrogenation reaction: controlling the weight ratio of resin to solvent to ensure that the concentration of resin is 20-40% by weight, taking chain-like or annular saturated hydrocarbon or aromatic hydrocarbon or hydrocarbon mixture as a solvent, and taking a supported noble metal hydrogenated catalyst as a catalyst, wherein the temperature of the high pressure hydrogenation reaction is 250-350 DEG C, the pressure is 8.0-20.0 MPa and the liquid volume space velocity is 0.5-2h<-1>. The properties of the final product hydrogenated C9 petroleum resin are as follows: Gardner is not more than 1, and the softening point is not smaller than 100 DEG C.

The method discloses a method for pretreating an enramycin fermentation liquor. The method comprises the following steps of: before extracting enramycin from the enramycin fermentation liquor, firstly adjusting the pH value of the fermentation liquor to a range of 4.0 to 7.0 by using an acid, and then adding aluminum sulfate accounting for 0.8-1.0% the weight of the fermentation liquor. The invention also discloses a method for preparing an enramycin premix. The method, compared with the existing enramycin production technique, is mainly characterized by pretreating the fermentation liquor of the enramycin so as to improve the quality of the finished product of the enramycin premix. The method for preparing the enramycin premix disclosed by the invention is simple and easy to implement and low in cost; and compared with the finished product without being subjected to pretreatment, the degradation degree of the enramycin obtained through the pretreated fermentation liquor is obviously reduced and the stability of the obtained enramycin premix finished product in the storage process is obviously improved. Furthermore, by adopting the method for preparing the enramycin premix disclosed by the invention, the enramycin finished product is more convenient and stable for storing, transporting and applying.

An oxide sintered body including indium element (In), gallium element (Ga) and tin element (Sn) in atomic ratios represented by the following formulas (1) to (3):

0.10≦In/(In+Ga+Sn)≦0.60  (1)

0.10≦Ga/(In+Ga+Sn)≦0.55  (2)

0.0001<Sn/(In+Ga+Sn)≦0.60  (3).

The invention discloses a production process for a directly-spun terylene industrial filament of a liquid-phase tackifying fusant, belonging to the technical field of spinning. The production process includes the following steps: esterification, polycondensation, liquid-phase tackification and spinning. The production process is characterized in that: in a vertical reaction kettle, liquid-phase tackfication is carried out on the fusant obtained through esterification and polycondensation of glycol and phthalic acid; the vertical reaction kettle adopts a tower type film forming structure; the fusant enters the vertical reaction kettle from the top part for distribution, and the film forming is naturally finished under the action of gravity; a backflow pipeline is provided for the discharging of the reaction kettle, the viscosity and flow rate of the fusant are controlled by the backflow adjusting, the intrinsic viscosity of the polyester fusant after being tackified in a liquid-phase manner is within 0.85 to 1.0dl/g, and the fusant is conveyed to a spinning box body by a gear pump for spinning. By reasonably designing the reaction kettle and allocating the process, the invention effectively solves the consistency between the fusant reacting condition and the staying time; meanwhile, the consumption of a public medium is reduced, and the cost is lowered; by optimizing the process, the invention increases the production efficiency of a system and improves the product quality.

The invention relates a press-working and solid forming method for improving the mechanical properties of polylactic acid (PLA) material plasticized with polyethylene glycol (PEG). The steps include: (1) preparation of PLA spline plasticized with PEG; (2) press-working and solid forming of the PLA spline plasticized with PEG; (3) heat treatment after the forming. The impacting property of PLA plactics plasticized with PEG can be increased by dozens of times, the stretching property can be increased by two times, solid motion of samples occurs by employing the method to give force on the samples, and in the process of solid motion, the internal microstructure of the material is improved, thereby achieving the purpose of improving the mechanical properties.

The invention discloses a method for preparing enramycin premix. The method comprises the steps that the temperature of enramycin fermentation liquor is firstly increased to 70-75 DEG C, then complex antioxidants of which the mass accounts for 0.5-1.0% of that of the enramycin fermentation liquor and filter aid of which the mass accounts for 0-12% of that of the enramycin fermentation liquor are added, and the mixture is stirred fully and evenly; frame filter and flash drying are performed on the evenly stirred mixture, auxiliary materials are added in the mixture for dilution, and then the enramycin premix is prepared. The method is simple, easy to operate and low in cost, and compared with finished enramycin premix which is not preprocessed, the enramycin premix has the advantages that the degradation degree is obviously weakened and the stability is obviously improved.

The invention relates to a compatilizer for a cellulose material reinforced composite material and a preparation method for the compatilizer, and belongs to the technical field of high polymer material modification. A reaction interface compatilizer is prepared by cografting acrylate monomers, styrene, an initiator, polyolefin, a bonding agent and the like on the polyolefin through a solid-phase grafting method. The compatilizer has the advantages that the grafting ratio of functional monomers on a polymer substrate main chain is high, the functional monomers can form covalent bonds with hydroxyl on the surface of a cellulose material efficiently, and the dispersibility of the cellulose material in a plastic substrate is promoted; meanwhile, the macromolecular main chain has proper molecular weight, can be subjected to chain entanglement with the plastic substrate in the composite material to improve the compatibility, has high melting fluidity, can effectively infiltrate the composite material during processing, is closely meshed at the interface to form an interface layer for effectively transmitting stress and effectively relieves fine cracks generated due to deformation of the material, the mechanical properties and water resistance of the composite material are improved, and the application range of the composite material in various fields is widened.

The invention provides a method for separating chemical components of grass family plants and purifying lignin. According to the method, grass family plant straw is taken as raw materials, the ligninis dissolved through an acid solubilizer, through the steps of filtering, washing, diluting, still standing and centrifuging, a cellulose solid product and a lignin sediment are obtained, and the sediment is subjected to dialysis to obtain the pure lignin. The convenient-to-recover acid solubilizer is utilized, thus the plant components can be effectively separated, the method is an environment-friendly technology, the chemical components of the grass family straw are separated under the condition of low temperature and short time, a high-temperature and high-pressure pressure vessel is not needed, the production cost can be saved, the production efficiency is improved, and energy consumption is reduced.

The invention discloses a nano waterproof decorative material which is composed of the following components in parts by weight: 20-25 parts of elastic emulsion, 1-3 parts of wetting agent, 0.5-3 parts of dispersant, 1.5-3 parts of thickener, 3-10 parts of flame retardant, 0.1-5 parts of defoaming agent, 0.1-3 parts of bactericide, 10-20 parts of kieselguhr, 10-25 parts of open-pore expanded perlite, 2-6 parts of nano silicon dioxide, 3-5 parts of nano ferrum dioxide and 1-4 parts of pigment. The pigment is any one or more of rutile titanium white, anatase titanium white or lithopone. The product has the advantages of small degradation degree, high stability and long service life; and all the production raw materials are environment-friendly, and thus, no waste water, waste gas, waste slag or pollution is generated in the production and construction process.

The invention discloses a glucose polymer peritoneal dialysis solution and a preparation process of the glucose polymer peritoneal dialysis solution, belonging to the technical field of peritoneal dialysis. The glucose polymer peritoneal dialysis solution is prepared from the following components in parts by weight: 50-150 g/L of glucose polymer, 80-150 mEq/L of sodium ions, 80-110 mEq/L of chloride ions, 0-4.0 mEq/L of calcium ions, 0-4.0 mEq/L of magnesium ions, 10-45 mEq/L of lactate radical ions, and an appropriate amount of water for injection. The components are mixed and dissolved, active carbon is added, thermal insulation and adsorption are carried out, decarburization and filtering are carried out, the pH value is adjusted, filling is carried out, opening sealing is carried out,sterilization is carried out, and thus the product is obtained. Compared with the traditional peritoneal dialysis solution, the product provided by the invention has the advantage that little glucosedegradation products, especially 5- hydroxymethylfurfural, are generated, and injuries caused by the product to the peritoneum during clinical use of the product are reduced; meanwhile, the stabilityof the molecular weight of the glucose polymer is guaranteed, and the effective ultrafiltration during the long abdomen indwelling period is realized.

The invention provides enzymolysis-resisting antibacterial peptide I9H12 as well as a preparation method and application thereof. A sequence of the antibacterial peptide I9H12 is shown as SEQ ID No. 1in a sequence table. The preparation method comprises the following steps: referring to the properties of amino acids; meanwhile, avoiding enzyme digestion sites of main proteinase in a body as muchas possible, and selecting hydrophobic amino acid isoleucine (Ile) and positive-charge amino acid histidine (His) as main amino acids to newly design the antibacterial peptide I9H12; carrying out amidation on a carboxyl terminal of the peptide to improve one positive charge and increase the stability of the peptide. The invention also provides the application of the antibacterial peptide to the preparation of targeting antibacterial medicines for treating gram-negative bacterium or fungus infectious diseases. According to the enzymolysis-resisting antibacterial peptide I9H12, the enzymolysis-resisting capability of the antibacterial peptide is effectively improved, and the application potential in actual production is improved.

The invention discloses a preparation method of multi-antibiotics premix. The method comprises the steps of heating fermented multi-antibiotics fermentation liquor up to 60-70 DEG C, and maintaining for 5-10 minutes; cooling, adjusting the pH to 2.5-5.0 by acid, feeding a stabilizing agent and an auxiliary agent, fully stirring, and carrying out plate-frame filtering on the fermented liquor to obtain a multi-antibiotics wet filter cake; then, carrying out flash drying on the filter cake, grinding, feeding auxiliary materials and diluting to obtain the multi-antibiotics premix. The preparation method of the multi-antibiotics premix is simple and easy to operate and low in cost; the stability of the obtained multi-antibiotics premix finished product is obviously improved in the storage process, so that the multi-antibiotics premix is more convenient and stable in the processes of storage, transportation and application.

The invention relates to a preparation method of a wood-reinforced thermoplastic resin-based environment-friendly formaldehyde-free composite material, and belongs to the field of composite material manufacturing and the field of wood processing. The method comprises the steps of manufacturing the solid wood into veneers by adopting a rotary cutting process; putting the veneers into a lignin removing agent solution to completely immerse the veneers, cleaning the veneers after high-temperature and high-pressure heating, adding water and hydrogen peroxide again, boiling, cleaning the veneers anddrying; soaking the veneers in a soaking solution containing one or more of a coupling agent, a flame retardant and a preservative, taking out the veneers and drying the veneers; unidirectionally aligning and stacking or vertically and horizontally crossing and stacking the veneers, and placing thermoplastic resin between every two adjacent layers of veneers, or placing the thermoplastic resin and a compatilizer at the same time; performing feeding into a cold press for high-pressure pre-pressing, and then heating to melt the thermoplastic resin, so as to obtain the multifunctional high-strength wood-based composite material. The product has extremely high static bending strength, elasticity modulus and surface wear resistance, the thickness expansion rate of the product is small, the dimensional stability is good, and meanwhile, the product is endowed with excellent corrosion resistance and weather resistance.

The invention provides an ABS consumable for 3D printing, and a preparation method thereof. The ABS consumable for 3D printing comprises acrylonitrile-butadiene-styrene resin, talcum powder master batches, calcium carbonate, a styrene-butadiene-styrene block copolymer, an antioxidant, a lubricant, a compatibilizer and color master batches. The preparation method comprises the following steps: rawmaterial drying, high-speed mixing, blending extrusion granulation, secondary drying and wire extrusion preparation. The product has the characteristics of low production cost, high mechanical strength, excellent processing fluidity, good impact resistance, long service life, uniform wire diameter, smooth surface, high glossiness and low shrinkage rate.

The invention discloses a method for compressing and compacting wood materials, and belongs to the field of wood material production and preparation. According to the method for compressing and compacting the wood materials, the wood materials are subjected to hot-pressing and setting treatment under the vacuum condition, and the processed wood materials are large in specific modulus, and the technical problems that, in an existing wood material compressing and compacting technology, the hot-pressing and setting time of is long, manufacturing efficiency is low, the color changes, and the sizeis not stable are solved; and the wood materials are subjected to compressing and compacting manufacture under the vacuum condition, so that bonding strength of the wood materials laminated with glueis also improved.

The invention provides a machining method for a degradable polymer intravascular stent. The machining method comprises the following steps that firstly, a pipe is formed; secondly, a stent base body is formed through laser engraving; thirdly, the surface of the stent base body is polished. In the first step, the pipe is formed through the extrusion technology that cold pressurization is carried out on a plastic pipe, wherein polymer raw materials for the stent base body are heated in a plastic extruder to the temperature higher than the corresponding melting point temperature Tm and lower than the extruding temperature in the normal pressure extruding technology by 5-15 DEG C, 5-20 MPa pressure is applied at the same time, the raw materials are extruded out of a mold of the extruder with the temperature and the pressure maintained, and slow cooling is carried out. Compared with the prior art, by means of the machining method for the degradable polymer intravascular stent, the strength of the obtained intravascular stent is higher, the overall radial supporting force is higher, and the surface of the stent is smoother and free of flaws.

The invention discloses a nanometer decoration material, which comprises the following components in parts by weight: 20-25 parts of elastic emulsion, 1-3 parts of a wetting agent, 0.5-3 parts of a dispersing agent, 1.5-3 parts of a thickener, 3-10 parts of a flame retardant, 3-6 parts of a lubricant, 2-5 parts of an antioxidant, 2-6 parts of a barium-zinc stabilizer, 0.1-5 parts of a defoaming agent, 0.1-3 parts of bactericide, 10-20 parts of diatomaceous earth, 10-25 parts of opened expanded perlite, 2-6 parts of nanosilicon dioxide, and 1-4 parts of nano ferrum dioxide. The nanometer decoration material is small in degradation degree, stable, long in service life, the selected production raw materials are environmental friendly; during the production and construction processes, no waste water, waste vapor and waste residues as well as no pollution are generated.

The invention discloses a nano waterproof material which is composed of the following components in parts by weight: 20-25 parts of elastic emulsion, 2-5 parts of film formation assistant, 15-25 parts of titanium white, 5-20 parts of filler, 1-3 parts of wetting agent, 5-15 parts of dispersing agent, 1-3 parts of thickener, 1-5 parts of bactericide, 10-20 parts of kieselguhr, 10-25 parts of open-cell expanded perlite, 3-5 parts of calcium stearate, 10-20 parts of hexamethyl phosphoryl triamide, 1-5 parts of epoxy solid increasing agent, 10-15 parts of defoaming agent and 1-4 parts of pigment. The product has the advantages of low degradation degree, higher stability and long service life; and all the production raw materials are environment-friendly, so no waste water, waste gas, waste residue or pollution is generated in the production and construction process.