185results about How to "High biodegradation rate" patented technology

Thermoplastic polyurethanes having an alternating sequence of hard and soft segments in which a nanostructured polyhedral oligosilsesquioxane diol is used as a chain extender to form a crystalline hard segment constituting SMPs. The polyurethanes are formed by reacting a polyol, a chain extender dihydroxyl-terminated polyhedral oligosilsesquioxane and a diisocyanate. The polyurethanes have multiple applications including for example, implants for human health care, drug delivery matrices, superabsorbant hydrogels, coatings, adhesives, temperature and moisture sensors, etc.

A biodegradable and toilet-flushable body waste collection pouch, and an appliance in which such pouch constitutes the inner pouch of a peelably separable pouch-in- pouch system, are disclosed. The walls of the inner pouch are composed of an ultra-thin, heat-sealable film impermeable to body wastes comprising a plasticized biodegradable polyester or copolyester externally covered by a soft, porous, water-disintegratable cover layer of biodegradable and water-dispersible fibers.

The invention relates to an in-situ remediation method of heavy metal-organic combined pollution soil. According to the method, a set of electrokinetic remediation device is added with a power switching system, an electrode heating technology is combined with the electrokinetic remediation and chemical oxidization technology, namely, the direct current power is utilized firstly, sodium persulfate used as the oxidizing agent is migrated to soil through electric process, meanwhile, migration and removal of heavy metal ion in the soil are realized. Then the alternating current power is switched, and soil is heated to a certain temperature through the electrode heating method so as to activate the sodium persulfate migrated to soil, and thereby realizing the in-situ degradation of organic pollutant in the soil. The method applies electrode to the electrode heating system and the electrokinetic remediation device at the same time, simplifies the remediation device and saves the system energy consumption while solves the difficulty that oxidant cannot migrate and activate in the soil and improves the remediation efficiency; the method is a combined soil remediation technology with prospect of application and promotion.

An object of the present invention is to provide a fiber-reinforced resin composition suitable for producing molded articles for products such as electrical and electronic equipment. The object has been achieved by a biodegradable resin composition containing a kenaf fiber, which contains a kenaf fiber in an amount of 10 to 50% by mass. In this case, the biodegradable resin is preferably a crystalline thermoplastic resin, particularly polylactic acid. The average fiber length (number average fiber length of the fibers excluding fragments) of the kenaf fiber is preferably 100 μm to 20 mm, and the kenaf fiber preferably contains a kenaf fiber having a fiber length of 300 μm to 20 mm. As the kenaf fiber, a fiber prepared from bast of kenaf is preferred.

An object of the present invention is to provide a fiber-reinforced resin composition suitable for producing molded articles for products such as electrical and electronic equipment. The object has been achieved by a biodegradable resin composition containing a kenaf fiber, which contains a kenaf fiber in an amount of 10 to 50% by mass. In this case, the biodegradable resin is preferably a crystalline thermoplastic resin, particularly polylactic acid. The average fiber length (number average fiber length of the fibers excluding fragments) of the kenaf fiber is preferably 100 μm to 20 mm, and the kenaf fiber preferably contains a kenaf fiber having a fiber length of 300 μm to 20 mm. As the kenaf fiber, a fiber prepared from bast of kenaf is preferred.

The invention discloses environment-friendly high-wear-resistance lubricating oil and a preparation method thereof. The lubricating oil comprises base oil, an antirust agent, an antioxidant and an anti-wear agent at extreme pressure, wherein the anti-wear agent at extreme pressure is a synthesized fullerene C60N-acyl amino acid derivative. The environment-friendly high-wear-resistance lubricating oil and the preparation method thereof have the advantages that the product has high biodegradation ratio, is applicable to any occasions and has extremely low friction coefficient; the product does not contain elements such as sulfur and phosphorus, so when the environment-friendly high-wear-resistance lubricating oil is used as internal combustion engine oil, pollutants discharged by an internal combustion engine are reduced and the discharge requirement above national IV can be met.

The present invention relates to a method for degrading a plastic containing non-biodegradable polymers comprising submitting said plastic to at least one enzyme for modifying a polymer of said plastic which has a methane potential less than 5 Nm3 / t+ / −20%, wherein at least one product resulting from the modification exhibits a methane potential greater than 10 Nm3 / t+ / −20%.

The invention provides a degradable mulching film. The mulching film is prepared from the following raw materials in percentage by mass: 10-40 percent of composite bio-based modified plant extract, 20-60 percent of starch, 10-30 percent of polyvinyl alcohol, 1-5 percent of polyester, 5-25 percent of plasticizer, less than or equal to 0.4 percent of a reinforcing agent, less than or equal to 0.5 percent of a wet strength agent and less than or equal to 0.1 percent of a defoaming agent. A preparation method of the degradable mulching film comprises the following steps: preparing a composite bio-based modified plant extract; uniformly mixing the raw materials and granulating; and performing blow molding to form the film. According to the mulching film, pollution on soil caused by application of the mulching film can be effectively relieved, crop growth can be facilitated, a positive effect is played on agricultural production, the bio-degradation rate of a residual film which is used for four months can be over 85 percent, injurious insects can be repelled, breeding of injurious insects can be inhibited, and hazards and mycosis transmission can be reduced. The degradable mulching film has the characteristics of low cost, low energy consumption and comprehensive functions; the preparation process is simple and low in cost, and can realize effective utilization of raw material resources.

A biodegradable and toilet-flushable body waste collection pouch, and an appliance and method in which such pouch constitutes the inner pouch of a peelably separable pouch-in-pouch system, are disclosed. The walls of the inner pouch are composed of an ultra-thin, heat-sealable film impermeable to body wastes comprising a plasticized biodegradable polyester or copolyester externally covered by a soft, porous, water-disintegratable cover layer of biodegradable and water-dispersible fibers. The cover layer and film are weakly bonded together in such a way as to avoid pinholes in the film that might otherwise be caused by the fibers. When used as the inner pouch of a pouch-in-pouch system, the film of the outer pouch is selected to have a melting temperature higher than that of the inner pouch film, with the result that a peripheral heat seal joining the walls of the two pouches together will allow the walls of the outer pouch to be peeled away without delaminating the film and cover layers of the inner pouch.

A carrier and a method for preparing it are provided for use in the delivery of therapeutic agents. A polysaccharide is reacted with an oxidizing agent to open sugar rings on the polysaccharide to form aldehyde groups. The aldehyde groups are reacted to form covalent oxime linkages with a second polysaccharide and each of the first and second polysaccharide is selected from the group consisting of hyaluronic acid, dextran, dextran sulfate, chondroitin sulfate, dermatan sulfate, keratan sulfate, heparan, heparan sulfate and alginate.

The present invention relates to tough and ductile biodegradable, aliphatic polyester blend compositions and methods for preparing such compositions. It relates to products made out of such blend compositions, including, but not limited to, films, fibers, nonwovens, sheets, coatings, binders, foams and molded products for packaging. The products exhibit a desirable combination of high strength, ductility and toughness, while maintaining flexibility, biodegradability and compostability. The products are useful for a variety of biodegradable articles, such as diaper topsheets, diaper backsheets, disposable wipes, shopping and lawn / leaf bags, agricultural films, disposable garments, medical disposables, paper coatings, biodegradable packaging, binders for cellulose fibers or synthetics, and the like.

Methods of retarding the setting of a cement composition comprise including one or more secondary amines substituted with a carboxyl group or salts thereof (e.g., 3-hydroxy N,N′-iminodisuccinic acid) in the cement composition. The inclusion of such materials in cement compositions may be highly beneficial. In wellbores having BHCT's of less than or equal to about 250° F., the use of the secondary amine as the set retarder ensures that the thickening time of the cement composition is sufficient to allow the cement composition to be pumped to its desired downhole location. Further, the secondary amine may be used in combination with conventional set retarders to enhance the ability of those retarders to increase the thickening time of the cement composition at higher BHCT's, e.g., from about 250° F. to about 525° F.

The invention belongs to the detection technology method for the surface discontinuity of metal and nonmetal workpieces, and particularly relates to an environment friendly water-based coloring-fluorescent double-sensitivity penetrant and the preparation method thereof. The penetrant adopts water as the primary solvent, and the other components of the penetrant mainly comprises a penetrating solvent, fatty alcohol amide, natural fatty alcohol polyoxyethylene ether, dyes, other additives, etc. The preparation method comprises the following steps: screening the raw material; metering; distributing the raw material; filtering; checking; bottling; etc. The penetrant has the advantages of high sensitivity and double-sensitivity, allows a crack with an opening width of 0.1Mum to be detected, and is applicable to observation in sunlight or under the irradiation of a black light lamp in a dark room. Since the water is adopted as the primary solvent, the penetrant has the advantages of environment friendly material, flame resistance, non-environmental pollution, safe application, low preparation cost, etc.

The invention relates to a biodegradable industrial gear oil composition which is composed of at least one extreme pressure wear-resistant agent (a), at least one antioxidant (b), at least one friction improver (c), at least one demulsifying agent (d), at least one antirust agent (e), at least one anti-foaming agent (f) and at least one synthesis base oil (g). Biodegradable industrial gear oil has outstanding biodegradable performance, outstanding extreme pressure wear-resistant performance, excellent sealing material compatibility, excellent emulsion resistance, good oxidation stability and good corrosion resistant performance. The composition can be used for lubricating various gear devices comprising spur gears, helical gears, bevel gears and the like in environmentally sensitive areas, and can completely meet the requirement of environmental protection for the biodegradable performance of oil products.

The invention discloses an environment-friendly optical glass cleaning agent and a preparation method thereof. The environment-friendly optical glass cleaning agent is prepared from the following raw materials in percentage by mass: 2 to 6 percent of inorganic alkali, 0.5 to 0.8 percent of anionic surfactant, 0.2 to 0.4 percent of non-ionic surfactant, 15 to 35 percent of film-forming agent, 0.4 to 1.0 percent of corrosion inhibitor, 0.5 to 1 percent of chelating agent and the balance of deionized water, wherein the anionic surfactant is prepared from sodium lauryl sulfate and fatty acid methyl ester sulfonate in a mass ratio of (5:1) to (1:1); the non-ionic surfactant is prepared from dodecyl glycoside; the film-forming agent is prepared from ethanol and ethylene glycol in a mass ratio of 1:1; the corrosion inhibitor is prepared from sodium citrate and triethanolamine in a mass ratio of 1:1. The optical glass cleaning agent disclosed by the invention has the advantages of good cleaning effect, high cleanliness of cleaned glass, no corrosion to the glass, high biodegradability, freeness from pollution, and low skin irritation.

Cement compositions may comprise one or more secondary amines substituted with a carboxyl group or salts thereof (e.g., 3-hydroxy N,N′-iminodisuccinic acid) for retarding the setting of such compositions. The inclusion of such materials in cement compositions may be highly beneficial. In wellbores having BHCT's of less than or equal to about 250° F., the use of the secondary amine as the set retarder ensures that the thickening time of the cement composition is sufficient to allow the cement composition to be pumped to its desired downhole location. Further, the secondary amine may be used in combination with conventional set retarders to enhance the ability of those retarders to increase the thickening time of the cement composition at higher BHCT's, e.g., from about 250° F. to about 525° F.

The invention discloses a biological environmental-protection detergent, which comprises the following raw materials in weight percentage: 1.5-0 percent of a biological surface active agent, 1.5-50 percent of a non-ionic surface active agent which comes from agricultural and sideline products and can be used as a food emulsifying agent, 10-80 percent of awater-soluble oxygen-contained solvent and the balance of water. All the components interact, thereby, overflowing oil can be rapidly emulsified; the biological degradation rate is high; secondary pollution cannot be caused to water areas; and the phenomenon that the health of other organisms and human is influenced because aquatic organisms are poisoned by the detergent is avoided.

The invention discloses a sewage treatment system and method for a natural gas purifying factory in H2S-containing gas field. By adopting a biological treatment process comprising pre-aeration, air floatation, hydrolytic acidification, anaerobic treatment, aerobic treatment, and precipitation, the quality of the treated water meets the primary standard of supreme permissible effluent concentration of the second category of hazardous in national integrated wastewater discharge standard. According to the invention, innovation is created based on anaerobism-aerobism of conventional purifying factory biochemical sewage treatment processes, and a sewage pretreatment step realized by hydrolytic acidification is added, thus water quality and quantity are effectively adjusted, the biodegradability of the sewage is greatly raised, and favorable conditions are created for posttreatment of the sewage; in the stage of subsequent treatment, the anaerobic-aerobic segment is changed into an aerobic-anaerobic segment, the sewage retention time is greatly reduced, the volume of treatment building is correspondingly reduced, thus the engineering investment is saved, and the workload of maintenance management is reduced.

The invention provides lipophilic slow release fertilizer used for modifying environmental creatures in oil pollution positions and a preparation method for the fertilizer. The composition comprises granular nitrogen fertilizer, calcium dihydrogen phosphate, trace elements, polyvinyl alcohol, vegetable oil and fillers. The granular nitrogen fertilizer is placed in a barrate coating machine; the calcium dihydrogen phosphate, the trace elements and the fillers are mixed uniformly and placed in a feeding tank of the coating machine; the polyvinyl alcohol is prepared as water solution with the concentration of 15 percent, poured into an elevated tank of the coating machine and at the same time rotating speed and the temperature are set; the coating machine and an air compressor are started and the water solution is sprayed on a granular surface of nitrogenous fertilizer according to the set rotating speed and the temperature; meanwhile, the mixture of the calcium dihydrogen phosphate, the trace elements and the fillers are continuously sprinkled and the coating machine and the air compressor are heated to be rotated and the mixture is dried; the vegetable oil is dropped gradually and the two machines continue to rotate and then the coating machine and the air compressors are stopped; the temperature of the mixtures is decreased to room temperature to finish the products. The fertilizer can be attached to the oil and can slowly release the nutrients to maintain the constant growth of bacteria cells, thus remarkably promoting modifying efficiency of the creatures in the oil pollution places.

The invention discloses a method for preparing a transparent heat-resistance polylactic acid modification material, in which three methods for improving the heat resistance of polylactic acid, namely a method for changing a polylactic acid crystal state by using a nucleating agent, a method for changing a polylactic acid molecular structure by the crosslinking of a chain extender and a method formixing the polylactic acid and high glass transition temperature (Tg) polymer materials, are adopted. The method comprises the following steps of: drying all raw material mixed complexes at 80 DEG C for 5 hours; and granulating or directly processing to form a transparent heat-resistance polylactic acid product. The polylactic acid modification material comprises the following raw materials in parts by weight: 100 parts of polylactic acid, 5-10 parts of chitin whisker polymethyl methacrylate coating, 0.5-2.0 parts of chain extender, 3-5 parts of oligomer polylactic acid, and 0.1-0.5 part of 3-(nonyl-phenyl) phosphite ester. By using the method, the thermal deformation temperature of the polylactic acid composite material is over 100 DEG C, and the biodegradability and the high transparency of the composite material are effectively maintained.

The invention relates to the technical field of lubricants and particularly relates to a rustproof lubricant and a preparation method thereof. The rustproof lubricant comprises the following components in parts by mass: 40-50 parts of fatty acid glyceride, 20-30 parts of modified rapeseed oil, 4-8 parts of methyl silicone oil, 2-5 parts of a corrosion inhibitor, 4-8 parts of a nonionic surfactant, 5-9 parts of polyvinylpyrrolidone, 4-8 parts of a sulfonate rustproof agent, 3-7 parts of phosphates amine salt, 0.8-1.5 parts of a rustproof compound, 0.8-2.5 parts of sodium molybdate, 5-10 parts of ethanol, 2-5 parts of polyethylene glycol, 5-10 parts of glycerol, 0.2-0.6 part of a fungicide, 0.2-0.8 part of a solid additive and 0.1-0.5 part of an antioxidant corrosion-resistant agent. The rustproof lubricant has the beneficial effects that 1, the modified rapeseed oil is adopted as base oil, the advantages of high biodegradation rate, high viscosity index, good viscosity-temperature performance, excellent extreme pressure anti-wear property, good low-temperature fluidity, easily available raw materials and low cost are achieved; and 2, by adopting the rustproof lubricant, the advantages of high biodegradation rate and anti-wear friction-reducing capability are achieved, the friction pair bearing capacity is improved and the service life of the device is prolonged.

The invention discloses an additive and automotive methanol diesel oil thereof and a preparation method of the methanol diesel oil. The additive comprises (by wt%) mixed fatty acid esters 15, unsaturated fatty acids 7, mixed fatty acids 15, castor oil 2.8, a palmitic acid 5, a cetane number improver 0.1, C4 to C10 fatty alcohols 30, a corrosion inhibitor 0.03, ethyl acetate 11, a combustion improver 0.06, butyl acetate 9, a dispersant 0.01 and hydrogenated ricinoleic acid 5. The methanol diesel oil comprises (by wt%) methanol 10 to 30, biological diesel oil 18 to 34, standard diesel oil 26 to 67 and the additive of the invention 5 to 10. The preparation method of the methanol diesel oil comprises the following steps of: adding methanol and the additive of the invention into a mixing tank at the ratio, mixing, sequentially adding the biological diesel oil and the standard diesel oil into the mixing tank at the ratio and mixing uniformly. The additive has the advantages of low material cost and simple preparation process, and the methanol diesel oil has the advantages of stable performance, low cost, simple preparation method and easy popularization.

The invention discloses a method for preparing marsh gas by fermenting steam-explosion wood fiber straws, which comprises the following steps: cutting up the straws first and filling the same into an steam-explosion device to perform steam explosion so as to obtain powdered and threadlike steam-explosion straw materials, and putting the steam-explosion straw materials into an anaerobic biogas reactor to perform anaerobic fermentation so as to generate biogases. The content of methane in the biogas prepared by the method is higher with 65 to 75 percent. The method has multiple functions of improving the problem of the structural inhibition of the anaerobic fermentation of the wood fiber straws, obtaining clean energy source, and treats the wood fiber straw wastes in countryside simultaneously.

The invention relates to a remote high-voltage pulse nanosecond switch applying insulating oil. The remote high-voltage pulse nanosecond switch comprises an organic glass shell, an electrode disk, a cathode, an anode, a triggering electrode, an electromagnet, a refined rapeseed oil serving as an insulating medium and a remote triggering and controlling system. The cathode, the anode and the electrode disk are tightly fixed together through bolts; the head of an electromagnet shell is provided with a thread and is connected with the organic glass shell of the switch; the tail end of an electromagnet core is connected with the triggering electrode through an organic glass rod; and the remote triggering and controlling system consists of a wireless remote controller, a receiving antenna, a high-frequency receiving module packaged in a metallic shield shell, a decoding integrated circuit (IC), a driving circuit, a relay and a storage battery. According to the remote high-voltage pulse nanosecond switch, radio signals emitted from the controller are received by the antenna, transmitted to the high-frequency receiving module and decoded by the decoding IC, the relay is driven by the driving circuit to energize the electromagnet and push the triggering electrode to move towards a main electrode, so that quick high voltage discharging is safely, reliably and conveniently realized, and a pulse wave form of which the rising edge is a nanosecond level is formed.

The invention belongs to the technical field of ecological agriculture and in particular relates to a soil improver prepared from waste materials of an ecological fermentation bed as well as a preparation method of the soil improver. The soil improver prepared from waste materials of the ecological fermentation bed is prepared from the following components in parts by mass: 90-100 parts of waste materials escaping from the ecological fermentation bed, 20-30 parts of wheat straws, 20-30 parts of corncob powder, 10-15 parts of gulfweed, 10-15 parts of a chitin liquid, 3-4 parts of plant ash, 1-3 parts of shell powder, 3-5 parts of silkworm excrement, 5-10 parts of bentonite, 1-5 parts of seaweed soil, 3-5 parts of humic acid, 0-1 part of microelements and 1-3 parts of an enzymic preparation. The soil improver provided by the invention has the advantages that the utilization of the waste materials escaping from the ecological fermentation bed in a pig raising process is increased, the structure and fertility of soil are improved, and the soil improver is environmental-friendly and ecological and low in price.

Amphiphilic copolymers formed from plant oil-derived vinyl ether monomers and polyethylene glycol alkyl vinyl ethers are provided. Nanoparticles coated with these amphiphilic polymers are well-suited for water remediation applications.

The invention discloses a technique of co-processing ecological type rural sewage water and rural organic solid waste. The process comprises that first adjusting supernatant fluid of an anaerobic tank and other sewage water, treating the adjusted sewage water through a tower earthworm ecological filtering tank to reach the national emission standard and blend and anaerobic ferment the lower deposits of the anaerobic tank and the rural organic solid waste in an anaerobic biogas reactor to produce biogas. The produced biogas is utilized as energy resource, the discharged methane residue is utilized as organic fertilizer or fertilizer of breeding earthworm, the obtained earthworm can also be used to adjust the purity of the post-sewage. The invention proceeds ecological and low cost treatment of the rural sewage water and rural organic solid waste via the combined action of the animal and the microorganism, simultaneously, the produced clean biogas and organic fertilizer have multiple functions of improving rural environmental quality, obtaining clean energy resource and simultaneously treating rural sewage water and rural organic solid waste.

The present invention provides a method for detecting biochemical oxygen demand. Active sludge, surface water, domestic waste water, or industrial waste water comprising microorganism is taken as a water sample with microorganism in the method provided by the present invention. The water sample with microorganism is cultivated to obtain a microorganism film. The blank water sample and the target water sample are made to pass through the microorganism film respectively. The dissolved oxygen reduction current values of the blank water sample and the target water sample are detected. The difference value between the dissolved oxygen reduction current value of the target water sample and that of the blank water sample is obtained. On the basis of the difference value and the predetermined standard curve, the biochemical oxygen demand of the target water sample is acquired. The method provided by the present invention adopts active sludge, surface water, domestic waste water, or industrial waste water comprising microorganism as the water sample with microorganism. The environmental adaptability of the prepared microorganism film is strong, so that one or more of tap water, well water, atmospheric water, or ground water may serve as medium to maintain the physiological activity with no need of providing a buffer solution system.

The invention provides a lubricating method for wind power generator, which comprises a lubricant, a wind power generator. Compound lubricant is adopted; the main lubricating parts of the wind power generator include a gear box, a generator bearing, a crab system bearing and gear, a hydraulic brake system and a min bearing. Compared with the ordinary mineral grease, the adopted compound lubricant has the advantages of excellent viscosity-temperature characteristics and little impact due to temperature change, is able to ensure easy startup under low temperature and no loss under high temperature, thereby providing sufficient lubrication for the friction parts. In addition, with excellent stability of thermal oxidation and little loss in vaporization, the lubricant can be used for a long time under rigid working condition and climatic situation. Especially, with high biodegradation rate, the compound lubricant can be widely promoted as it results in no pollution to the soil and water source.

Described is a method of producing fibers by melting process in spinning extruders by using a composition containing polyacrylonitrile (PAN), lignin and plasticizers with high boiling point and dipolar moment, such as glycerine and glycerol carbonate. The use of thermal stabilizers also derived from halogenated glycerol, known as halodridines, and additives derived from the esterification of glycerin with fatty and phosphoric acids are also described. By removing the plasticizers and the soluble additives in polar solvents, such as water and alcohols, shortly after the spinning step, it is possible to produce fibers from PAN / lignin blend with characteristics similar to those produced by traditional wet spinning process, widely used in the production of carbon fiber. The lignin used may be that obtained by the Kraft Process. The glycerin used as a plasticizer can be derived from the production of biodiesel, which does not need to be purified by distillation process.