651results about How to "Degradable" patented technology

The invention relates to solid-state electrolytes, in particular to a polycarbonate all-solid-state polymer electrolyte, an all-solid-state secondary lithium battery made of the same and preparation and application thereof. The all-solid-state polymer electrolyte is prepared from polycarbonate macromolecules, lithium salt and a porous supporting material; the thickness is 20-800 micrometers, the mechanical strength is 10-80 MPa, the room temperature ion conductivity is 2*10<-5>S/cm-1*10<-3>S/cm, and the electrochemical window is higher than 4V. The all-solid-state polymer electrolyte is easy to prepare and form, good in mechanical property, high in ion conductivity and wide in electrochemical window; meanwhile, the solid-state electrolyte effectively inhibits growth of negative electrode lithium dendrites and improves interface stability and long circulation performance.

The present invention relates to nano mesoporous and mesoporous-macroporous biological glass produced and through surfactant self-assembling and sol-gel process under mild reaction condition and possessing excellent bioactivity. The new type of biological glass has controllable mesoporous structure, homogeneous and adjustable mesopore distribution, relatively great specific surface area and porosity, macropores with adjustable size and porosity, and controllable shape. The present invention may be used as bone repairing material, dental material and rack material in tissue engineering and for medicine embedding and controlling releasing, etc.

The invention relates to a preparation method for a chitosan natural polymer modified crude oil desalting demulsifier. The method comprises the following steps: 1) modifying polyethylene glycol monomethyl ether by halogenating; 2) preparing glycidyl dimethyl alkyl ammonium chloride; 3) preparing quaternized carboxy alkyl chitosan; 4) causing the modified polyethylene glycol monomethyl ether to react with the quaternized carboxy alkyl chitosan, thereby obtaining a target product, polyethylene glycol monomethyl ether grafted quaternized carboxy alkyl chitosan. According to the invention, the chitosan natural high-molecular compound is taken as the raw material and has the advantages of wide resource, naturality, non-toxicity, sustainability, excellent biological compatibility of products, degradability, and the like. The demulsifier prepared according to the invention has excellent demulsification dewatering effect; the molecule of the demulsifier contains a large amount of carboxy alkyl groups and quaternary ammonium salt groups and the electronegative ions, including metal cation, naphthene acid radicals, and surfaces are electronegative grains and have strong combining capacity, so that the demulsifier has the capacities of demulsifying while removing oil-soluble salt.

The invention discloses energy-efficient long-life gasoline engine oil prepared from the following components: synthetic base oil, a composite antioxygen, a metal cleaning agent, an ashless dispersant, a nano-level friction improver, a viscosity improver and a pour point reducer. The gasoline engine oil provided by the invention has the following advantages: requirements of API SM, ILSAC GF-4 and SAEJ300 are met and the service life is long; the complete synthetic base oil features low pour point, high viscosity index, good economy of fuel, degradability and reduced harm to the ecological environment; the phenol type antioxygen is combined with ZDDP, the anti-oxygen and antifriction properties are good and the catalyst poisoning in a tail gas processing unit is prevented; the acid neutralization capacity is good, the cleaning dispersibility is good and the oil sludge and carbon deposit are prevented from being generated; and the nano-level friction improver is added, the frictional factor is low, and the oil film features high carrying capacity and can automatically repair abraded surface and lengthen the service life of the engine.

The invention relates to a preparation method of a polyether-grafted chitosan derivative crude oil desalting demulsifier. The preparation method comprises the following specific steps: firstly, performing formylation modification on polyethylene glycol monoethylether; secondly, preparing glycidyl dimethyl alkyl ammonium chloride; thirdly, preparing quaternarization carboxyalkyl chitosan; fourthly, enabling formylation modified polyethylene glycol monoethylether to react with carboxy alkyl chitosan to obtain the polyether-grafted chitosan derivative crude oil desalting demulsifier. The polyether-grafted chitosan derivative crude oil desalting demulsifier disclosed by the invention is prepared by taking chitosannatural polymeric compounds as raw materials, and has the advantages of wide sources, naturalness, no toxicity, sustainability, good biocompatibility of a product, degradability and the like. The prepared demulsifier is good in demulsifying and dehydrating effect; meanwhile, a demulsifying molecule contains a large amount of carboxyalkyl groups and quaternary ammonium salt groups which have strong combining capacity to metal cation, ions with negative electricity such as naphthenic acid radicals as well as particles of which the surfaces are electronegative, so the polyether-grafted chitosan derivative crude oil desalting demulsifier has capacity of removing oil-soluble salts while demulsifying.

The invention discloses a preparation method of a biomass-base polyurethane foam material, belonging to the technical field of chemical industry. The method mainly comprises the following steps: mixing polybasic alcohol liquefier and liquefying catalyst, putting the mixture in a container, heating to 150-200 DEG C, adding biomass waste and industrial lignin, liquefying, and cooling to room temperature to obtain a biomass liquefied product; and mixing the prepared biomass liquefied product, foaming catalyst, foam stabilizer, foaming agent and lignosulphonate into a component A, using isocyanate as a component B, mixing the component A and component B in a mixing vessel, stirring at 20-40 DEG C at 8000-14000 rpm for 5-30 seconds, pouring the mixture into a die, naturally foaming for 5-60 seconds, standing at 80-120 DEG C for 8-24 hours, and storing at room temperature for 8-24 hours until the mixture is sufficiently aged and formed. The invention can obviously improve the properties of the biomass-base polyurethane foam.

The invention relates to a synthesis method of a crude oil desalting demulsifying agent. The method specifically includes the steps of firstly, conducting p-nitrophenyl ester modification on methoxypolyethylene glycol; secondly, preparing glycidyl dimethyl alkyl ammonium chloride; thirdly, preparing quaternized carboxy alkyl chitosan; fourthly, making the modified methoxypolyethylene glycol react with quaternized carboxy alkyl chitosan to obtain a product, namely polyethylene glycol questin grafted quaternized carboxy alkyl chitosan. A chitosan type natural high-molecular compound serves as the raw material and has the advantages of being wide in resource, natural, free of toxin, sustainable, good in product biocompatibility, degradable and the like; The prepared demulsifying agent is good in demulsifying dewatering effect; meanwhile, due to the fact that lots of carboxy alkyl groups and quaternary ammonium salt groups are contained in demulsifying agent molecules and have strong binding capacity with metal cations, naphthenic acid radicals and other ions with negative charges and particles with surface electronegativity, the oil-soluble salt removing capacity is achieved during demulsifying.

The invention provides a multifunctional active organic fertilizer and a preparation method thereof, relating to an organic fertilizer containing bacteria, fungi and spores, particularly an active organic fertilizer with functions of soil restoration and disease/pest resistance. The invention aims to provide a multifunctional active organic fertilizer capable of restoring soil pollution and improving product quality and a preparation method thereof. The multifunctional active organic fertilizer is composed of three layers from inside to outside, wherein the innermost layer is composed of a component A of which the main effective components are Bacillus subtilis and Paecilomyces lilacinus; the middle layer is composed of a component B and a component C containing multiple rich nutritive elements; and the outermost layer is composed of a component D of which the main effective components are Streptomyces vinaceus-drappus and Gliocladium roseum. The multifunctional active organic fertilizer can passivate heavy metals in soil, activate the soil, improve the microecological environment of the rhizosphere, degrade the chemical pesticides and improve the crop quality. The multifunctional active organic fertilizer is used in the field of agricultural planting.

The invention relates to a novel active packaging film. The active packaging film is characterized in that a film-forming base material is polyvinyl alcohol; a film-forming assistant contains ethylene glycol and lauryl sodium sulfate. The novel active packaging film contains broad-spectrum long-acting antibacterial beta-cyclodextrin inclusion compound particles. The inclusion compound particles account for 4-24 percent of the weight of the active antibacterial film. The particles are 1-100 nanometers in particle size; through the slow release of essential oil in the inclusion compound and the migration in the film, an antibacterial action is performed on surfaces of foods finally. The active packaging film provided by the invention is a colorless transparent film which is light in spice smell, consistent in thickness, fine and smooth in hand feeling and better in mechanical property, is not obvious in bubbles, is complete, bright and clean, and is capable of meeting the mechanical requirement of food packaging. The transparency is good, so that content held in the active packaging film can be clearly seen when the active packaging film is used for packaging the foods.

The invention relates to an active packaging film for chilled meat and a preparation method of the active packaging film. The active packaging film employs polyvinyl acetate (PVA) and polylactic acid (PLA) as film-forming materials and sustained-release microcapsules as an active antimicrobial agent. The natural antimicrobial agent is slowly released from the microcapsules, migrates in the film and finally reaches the surface of the chilled meat to achieve antimicrobial and fresh-keeping effects. Meanwhile, as PVA has a good gas barrier property, good chilled meat packaging atmosphere conditions can be kept. PLA has a good water vapor barrier property, and can effectively reduce the moisture loss of the chilled meat during storage. The active packaging film for the chilled meat provided by the invention is a colorless transparent film with a smooth and uniform surface without visible air bubbles, and mechanical properties of the film can meet the mechanical requirements of chilled meat packaging.

The invention relates to a method for preparing hydrophobically modified xanthan. The method comprises the following steps: taking water/iso-propyl alcohol mixing liquid as a solvent, taking ammonium lauryl sulfate as an emulsifying agent, taking alkyl bromide as an etherifying agent, and carrying out reaction under the temperature of 30 to 120 DEG C and the pH of 6 to 9 to modify xanthan to obtain the hydrophobically modified xanthan. The conditions of a synthesis reaction are wild, raw materials are easy to obtain, monomer conversion is high, and products are convenient to process. The hydrophobically modified xanthan still has higher viscosity when the xanthan has lower molecular weights, has good salt resistance, has good degradable performance so as to be convenient to perform subsequent sewage treatment, and has good environment affinity. The method is suitable for the oil extraction production of high salinity oil reservoirs.

The invention provides a method for forming multiple fractures by forced planar diverting of a fracture opening being temporarily plugged. The method includes: allowing temporary plugging diverting material fluid to a position near the fracture opening in a reservoir so as to form a bridge plug and force the fracture to divert, forming multiple fractures, activating micro-fractures of the reservoir with active liquid or acid liquid, and forming a multi-fracture mesh. The method according to the technical scheme has the advantages that artificial fractures in unconventional oil-gas reservoirs, such as low-permeability and ultralow-permeability oil-gas reservoirs, tight oil reservoirs and shale oil-gas reservoirs, are forced to divert in the plane, forming multiple artificial fractures having guiding ability, chances to connect reservoir bodies are increased, drainage area is enlarged, cleaning diverting material is of degradability and can fully degrade after construction, all the fractures can be utilized, and yield increase is more obvious.

The invention relates to a degradable and nontoxic medical polyurethane material and a preparation method thereof, belonging to the technial field of biomedical high polymer materials. Raw materials thereof adopt poly (epsilon-caprolactone) dibastic alcohol (PCL) as a soft segment and L-lysine ethyl ester diisocyanate (LDI-E) or L-lysine methyl ester diisocyanate (LDI-M) and chain extender L-lysine ethyl ester (Lysine-E) or L-lysine methyl ester (Lysine-M) as a hard segment, wherein the number-average molecular weight of the poly (epsilon-caprolactone) dibastic alcohol ranges from 500 to 5000.The polyurethane of the invention is degradable, and degradation products thereof are harmless to human bodies; as a great amount of carbamido is contained in the polyurethane, the mechanical property and the degradation property of the polyurethane are improved; and the degradation products are completely nontoxic, the degradation product of lysine can neutralize 6- hydroxyl hexanoic acid generated by soft segment degradation, the pH value of adjacent tissues can not be changed, and therefore the polyurethane prepared by the invention has favorable biocompatibility.

The invention relates to a chitosan nano fibrous membrane adsorbing material and a preparation method thereof. The preparation method for the chitosan nano fibrous membrane adsorbing material comprises the steps as follows: chitosan spinning liquid is added into electrostatic spinning equipment; a chitosan nano fibrous membrane is prepared by an electrostatic spinning method; and the obtained chitosan nano fibrous membrane is soaked into alkaline liquid, and then is cleaned and dried to obtain the chitosan nano fibrous membrane adsorbing material. The average diameter of the nano fiber for forming the adsorbing material is 10-600nm; and the porosity of the adsorbing material is 15-60 percent. The adsorbing material has the characteristics of biocompatibility, biodegradability, hydrophilicity, low cost, large adsorption capacity and broad material sources. The adsorbing material can effectively absorb heavy metal ions comprising Cu (II), Hg (II), Cd (II) and Pb (II).

This invention relates to a preparation method for poly-asparagic acid resin, which takes poly-pyrrolidine dione as the raw material to make crosslink poly-pyrrolidine dione with method of non-even phase suspended emulsion crosslink or non-even phase suspension crosslink and processes poly-asparagic acid resin by hydrolyzation characterizing that the crosslink poly-pyrrolidine dione is prepared by multi-section crosslink reaction, in which, the crosslinker is fed in for 2-4 times in equal volume and equal time interval, the crosslink poly-pyrrolidine dione and the resin are aged and crystallized and quickly dried, A ageing and crystallization process for 1-10 days under room temperature, B, quick drying process is carried out under -54-40deg.C.

The invention discloses a preparation method based on an amphoteric cellulose composite material. Cellulose is used as a raw material to obtain amphoteric quaternary ammonium-sulfated cellulose, then the amphoteric quaternary ammonium-sulfated cellulose is used as a carrier of oxidized grapheme and chitosan, the amphoteric quaternary ammonium-sulfated cellulose, the oxidized grapheme and the chitosan can be powerfully combined under the actions of the covalent bond, the electrostatic attraction, the hydrogen bond and the like, and then is subjected to freeze-drying to obtain the amphoteric quaternary ammonium-sulfated cellulose, the oxidized grapheme and the chitosan ternary composited material. The composite material has the renewability, the degradability, green and environment-friendly effect and high-efficiency adsorbability, the condition is mild and easy to realize in the preparation process, and the cellulose can be reasonably and effectively utilized, therefore, the preparation method has good economic and social benefits.

The invention relates to a gelatin-based reverse gel crystal hydrogel three-dimensional bracket, a preparation method and an application thereof. According to the invention, a template micromanufacturing technique and a high-concentration light-induced crosslinking methacrylamide gelatin solution are utilized to manufacture a protein-based three-dimensional bracket with uniform pore interconnection, structure stability and adjustable degradation property. The gelatin-based reverse gel crystal hydrogel three-dimensional bracket can supply excellent cell attachment site and better intercellular interaction of liver cells, has the potential of serving as effective artificial liver platform for screening drugs and also has the potential of a multifunctional platform for same tissue engineering purpose and in vivo application. According to the invention, a highly ordered protein-based inverse opal hydrogel with biological degradability and uniform pore connectivity is prepared; the highly ordered protein-based inverse opal hydrogel can be used for biological application, such as, three-dimensional biological printing, three-dimensional cell culture, drug screening and in vivo transplanting; the gelatin-based reverse gel crystal hydrogel three-dimensional bracket is simple, controllable, regeneratable and economical.

The invention belongs to the fields of high polymer materials and biomedical engineering and particularly relates to a method for preparing pH-responsive graft copolymer taking ethyl cellulose as a main chain. The method comprises the following steps of: performing esterification reaction on residual hydroxyl in the ethyl cellulose main chain and a bromine-containing compound under the protection of inert gas nitrogen or argon to convert the hydroxyl into a bromine group; and performing atom transfer radical polymerization on a methacrylic acid-N,N-lignocaine ethyl ester monomer by using the bromine group as a macroinitiator to form pH-responsive polymer so as to finally obtain the pH-responsive graft copolymer taking the ethyl cellulose as the main chain. The pH-responsive graft copolymer taking the ethyl cellulose as the main chain has biodegradability, biocompatibility and pH value sensitivity and can be self-assembled into stable nano micelles in water, so the pH-responsive graft copolymer can be widely applied to the fields such as medicament release control carriers, biological intelligent switches, biological sensors, biological nano devices and the like. The method has the advantages of simpleness, practicability, industrialized production of raw materials and high popularization and application value.

The invention belongs to a preparation method for preparing a polymer skeleton with the surface coated with HKUST-1 through 3D printing, and an application of a polymer skeleton. The preparation method comprises the following steps: printing the polymer skeleton according to a structure specified in a model file by using a 3D printer, and adding the polymer skeleton into an ethanol water solution containing copper salt and trimesic acid; stirring and dripping triethylamine into the ethanol water solution; drying an obtained product at normal temperature or at 50-80 DEG C; soaking the product in methanol, and during the period, replacing the methanol solvent once every 8 hours; drying at the normal temperature or at 50-80 DEG C. According to the preparation method disclosed by the invention, the reaction conditions in the preparation process are moderate, the synthesis is performed at the normal pressure, no pressure equipment is required, the grain size of crystals which form the HKUST-1 is from 20 nanometers to 5 micrometers, the HKUST-1 is uniformly distributed on the surface of a polymer, and the full coverage rate is basically realized. The prepared polymer skeleton with the surface coated with the HKUST-1 has a remarkable dye adsorption effect, and the adsorption efficiency can be over 90%.

The invention provides a method for preparing a stone blocking dam by using waste and old rubber, which comprises the following steps of: determining construction conditions of a main body structure of the stone blocking dam, constructing a support wall and an end blocking wall of the stone blocking dam, pre-embedding fixed connectors on the walls, pre-embedding a stand column at the top of the support wall and embedding an anchor rod for fixing an anchor rope at a position of a toe; braiding tyre cages by using waste and old tyres, waste and old triangular belts and waste and old wire ropes, constructing a tyre cage energy-dissipating bank through the combination and connection of the tyre cages of different specifications, filling rock blocks, sandy soil or rubber soil into the hollow chamber of the tyre cages, fixing the tyre cage close to one side of the support wall of the stone blocking dam by using the fixed connector, and bolting other tyre cages by using the waste and old triangular belts; sleeving enough waste and old tyres on the stand column and fixing the support ropes between the adjacent stand columns by the waste and old tyres on the top; laying a layer of waste and old tyre net on the surface of the tyre cage energy-dissipating bank, wherein the support ropes between the stand columns form the upper boundary of the waste and old tyre net, the anchor rods at the position of the toes form the lower boundary of the waste and old tyre net, and the gaps between the waste and old tyre net and the tyre cage energy-dissipating bank can be filled by the waste and old tyres and waste and old rubber fragments; and constructing the dam body consisting of the support wall, the tyre cage energy-dissipating bank and the waste and old tyre net in segments step by step and constructing an end part backstop above the end part blocking wall. The method can greatly improve the rolling stone blockage performance of the stone blocking dam.

The invention relates to a degradable magnesium alloy implanting material for bone fixation and a preparing method of the degradable magnesium alloy implanting material. The implanting material is prepared from, by mass percent, 0.5-4% of Mg, 0.5-4% of Ag and the balance Y. The preparing method of the implanting material comprises the steps of ingot casting metallurgy, extruding, rolling and heat treatment. The prepared implanting material meets the requirement of plates, rods and profiles, wherein the plates, the rods and the profiles serve in biological fluid environments. By means of alloy materials, the good comprehensive mechanical performance needed by bone fixing materials is ensured, the beneficial effects of being capable of inhibiting bacteria, resistant to corrosion, free of cytotoxicity, good in biological mechanical property and the like are achieved, and the alloy materials can be degraded under the biological fluid environments. The implanting material can serve as bone nails or marrow nails or bone fraction plates or other various devices to be used under the medical conditions, and the comprehensive performance is good; and especially, the implanting material has both the biomechanical property and the biodegradable performance at the same time, and the typical defect of existing metal materials of a titanium alloy or stainless steel or high polymer materials in application of the department of orthopaedics is overcome.

The invention discloses an application of ionic liquid which serves as a steel corrosion inhibitor. The imidazolyl lysine salt ionic liquid serves as a corrosion inhibitor, only the corrosion inhibitor is required to be added into a solution contacted with steel, and the corrosion inhibitor is easy to operate and good in corrosion inhibition effect. The corrosion inhibitor is environment-friendly, high in solubility and biodegradability and good in corrosion inhibition effect, and solves the problems that the conventional corrosion inhibitor has large toxic and side effects, low biodegradation, poor environment friendliness and the like.