77results about How to "Improve controlled release performance" patented technology

The invention discloses a polymer coated released fertilizer and a preparation method thereof and a special coating material thereof. The coating material comprises isocyanate, polyol, degradable functional monomer, an aid agent of coating and a chain extender, wherein, the mol ratio between the isocyano group in the isocyanate and the hydroxyl group in the polyol is 1:2 to 2:1 and the mass of the degradable functional monomer is 1 percent to 20 percent of the mass of the coating material. The coated released fertilizer provided by the invention consists of a core and a karyotheca, wherein, the core is granule fertilizer and the karyotheca is prepared from the coating material, and the mass of the karyotheca is 2 percent to 10 percent of the mass of the core. The coating material has good film forming and water resisting performance and can be degraded in nature. The hardness and the elasticity of the material can be adjusted by changing the mixure ratio of the coating material so as to prepare released fertilizers with different releasing periods.

The invention provides a highly active biological water preservation slow release compound fertilizer. The special compound fertilizer is prepared by compounding the ordinary fertilizer with microelements, then a certain amount moderate organic minerals, high water-absorbent resins, humic acids, and biological preparation are crushed and mixed into 100 mesh to 350 mesh to obtain compound powder preparation and subsequently the special compound fertilizer is placed into a granulator, and added with water with a mass ratio of 0.1 to 1 to the compound fertilizer. At last, the compound powder preparation is added into the granulator and the obtained mixtures are granulated and dried to obtain the highly active biological water preservation slow release compound fertilizer. The adoption of ordinary nitrogen, phosphor, and potassium as main materials, and mix of croelements according to requirements for soil fertilizer test and plants to adjust the formula, the highly active biological water preservation slow release compound fertilizer can enhance the effective utilization of fertilizer, lower the pollution to soil, and facilitate the growth of vegetables. The application of the product to the agricultural and forestry production can enhance the utilization of fertilizer by above 60 percent and lower the used amount of fertilizer by 50 percent, reduce the pollution to soil, and enhance the yield and quality of crops.

The invention discloses a coated controlled-release fertilizer and a preparation method thereof. The coated fertilizer is composed of fertilizer particles and a polymer coating layer, wherein the polymer coating layer material is prepared from isocyanate, polyalcohol, a catalyst and a mesoporous molecular sieve; the mass of the mesoporous molecular sieve accounts for 0.05-10% of the mass of the polymer coating layer material; and the mesoporous molecular sieve is selected from at least one of a molecular sieve with a pore canal structure and molecular sieve initial powder with no pore canal structure. The coated controlled-release fertilizer provided by the invention achieves the purpose of improving the controlled-release performance of nutrients by means of the coating layer under the interaction of the mesoporous molecular sieve having nano confinement effect and a polyurethane matrix.

This invention discloses a polymer-coated controlled-release fertilizer, its production method and its specific coating material. The coating material comprises: branched low-density polyethylene with an average molecular weight of 20000-30000, and linear low-density polyethylene with an average molecular weight of 20000-30000 at a weight ratio of 1 :( 0.33-1). The polymer-coated controlled-release fertilizer is composed of water-soluble fertilizer and the coating material defined in claims 1-4. The water-soluble fertilizer is coated with the coating material. The polymer-coated controlled-release fertilizer has good controlled-release performance and safe processing, and can be used on lawns, flowers, vegetables, and economic crops.

The invention relates to a triad integration freckle-removing functional nano cream for skin external use and a method for preparing the same. The three types (night use type, daytime use type and auxiliary type) freckle-removing nano creams improve and optimize a novel international passive target transdermal drug delivery system (TDDS) as a carrier, and organically combine and solubilize freckle-removing functional components with different biological efficacies, action ways and physical and chemical properties to form a good mutual aid synergic function system which has remarkable effect of controlling and relieving colored patches (such as chloasma, inflammatory pigmentation, sunburn, and the like) caused by abnormal facial metabolism of pigment. The product has the advantages of tiny particle sizes of spherical particles, obvious passive target function, excellent adaptability, homodromous property, fluidity and dispersion, strong penetrability, even texture, subtleness, lubricity and luster, is simple and convenient to use, and is comfortable without pungency and side effects; besides, the appearance is light yellow with slight opalescence, is glittering and translucent, clear and transparent, sticky but not viscous, thick but not dense, and oily but not greasy, has good stability, excellent curative effect, short industrialization cycle and high production efficiency, saves time, materials and energy sources, dose not need special devices and heat energy, and is easy for popularization and application.

This invention discloses environmental protection style envelope control release urea and its preparation method. It solves problem of high cost and hard degradation of film in existing fertilizer. It is consisted by urea core and external layer envelope, the envelope is made up by natural silicate mineral powder, natural grease raw material and control releasing additive. Particle urea occupies 89.9-94.9 percent of the product; envelope material occupies 5.1-10.1 percent. Preparation procedures are that urea sieving, drying, envelope liquor and envelope powder preparation, enveloping, drying and packaging. The cost is low; its price is large lower than homogeneous product in and out country, nothing chemical components are contained in the enveloping material. Material, generating process and product using are environmental protected, and there is no solid and liquid and gas waste discharging. If it is used long time, it can change soil structure, and make soil loosen and enhance soil water keeping ability, it can preferably absorb and store moisture at certain time after nutrition releasing, generating equipment and technique are simple, and easy to large scale generating, nitrogen content is 41.1-43.7 percent.

The invention discloses a controlled release fertilizer of leafy vegetable, which is composed of the following components with the following weight proportion, (NH4)2HPO4 taking 14-16, (NH4)2SO4 taking 3-5, NH4Cl taking 13-20, K2SO4 taking 35-40, calcium superphosphate taking 8-15, diatomite taking 7-12 and high molecular polymer taking 20-25. The controlled release fertilizer of leafy vegetable effectively holds the rule of the fertilizer efficiency releasing and the fertilizer requirement of the leafy vegetable and achieves the anastomosis of the releasing peak of the azophoska fertilizer and the peak of leafy vegetable absorbing azophoska, thereby being more beneficial to the absorbability and the utilization of the fertilizer, decreasing fertilizing frequency, saving time and fertilizing amount, having perfect economic benefit and social benefit.

The invention relates to urea-coated composite emulsion and a preparation method and application thereof. The urea-coated composite emulsion consists of waterborne polyurethane emulsion, styrene-acrylic emulsion, nonionic surfactant and the like, or consists of waterborne polyurethane emulsion, styrene-acrylic emulsion, nonionic surfactant, organic silicon emulsion and the like. The urea-coated composite emulsion provided by the invention delays quick release of fertilizer, obviously increases the release time, and can be matched with the nutrient intake of plants particularly by ternary blending. The coated composite emulsion provided by the invention can be used for coating any water-soluble fertilizer and has very broad application prospect.

The invention discloses a potential of hydrogen (pH) response random copolymer based on poly-beta amino ester and a preparation method and application thereof. Firstly, polylactic acid with two ends sealed with hydroxide radicals is synthesized through a solution polymerization method, propylene serves as a macro-monomer after acidification, and a pH response amphiphilic copolymer is prepared through the Michael gradual addition reaction. The proportion of functional groups in the polymer molecule can be regulated. The synthetic process is simple, and the production rate is high. By means of a polymeric micelle obtained through a dialysis method and with a hydrophobic group (polylactic acid) and a pH response group (poly-beta amino ester) forming a kernel and a hydrophilic group forming acasing, water slight-solubility anti-cancer drugs can be coated into the kernel of the micelle, and the drugs can be slowly released in low quantity under neutral or weak alkaline conditions and can be quickly and controllably released under weakly acidic conditions.

The invention provides a controlled-release fertilizer, and a preparation method and an application thereof. The controlled-release fertilizer comprises a polyurethane coating material and an inorganic fertilizer, wherein the mass ratio of the polyurethane coating material to the inorganic fertilizer is (1-6): 1000. The controlled-release fertilizer has the following advantages: controlled-releaseperformance is excellent; modified castor oil and diisocyanate are used as main reaction raw materials of the polyurethane coating material; mechanical properties and processing performance of a filmlayer are improved through addition of a chain extender, an auxiliary agent and a catalyst; a formed polyurethane film layer has higher strength and good toughness; the controlled-release performanceis significantly improved; little influence is generated by the adhesion process in the process of processing; continuous coating film production can be continuously and stably performed; the initialdissolution rate is generally 2% or below; the minimum differential dissolution rate can achieve about 0.83%; the longest release period can achieve 70 days or above; and compared with a conventionalcontrolled-release fertilizer, the controlled-release fertilizer provided by the invention shows better mechanical properties, is free of the phenomenon of adhesion, and facilitates market application.

The invention provides an ultra-high temperature-resistant water-based drilling fluid. The ultra-high temperature-resistant water-based drilling fluid comprises clay, an alkalinity regulator, a rheological stabilizer, a fluid loss control agent, an inhibitor, a lubricant and water. The rheological stabilizer is prepared from 40 to 56 portions by mass of an oil phase, 40 to 56 portions by mass of an aqueous phase, 2 to 5 portions by mass of an initiator and 2 to 5 portions by mass of a cross-linking agent. The oil phase comprises white oil and an emulsifier. The aqueous phase comprises 2-acrylamido-2-methylpropanesulfonic acid, N, N-diethyl acrylamide, methacrylic acid and acrylamide. The embodiment result shows that after ultra-high temperature aging at 260 DEG C, the drilling fluid has micron and submicron-level spherical aggregation-state structures. The nanometer spherical molecular polymer rheological stabilizer has good temperature resistance. Through synergism of spherical aggregation-state structure reinforcement and drilling fluid components, the ultra-high temperature stability of the drilling fluid is improved.

The invention relates to a modified nitrogen control material prepared from lake sediments, a preparation method and application thereof. The method includes: collecting lake sediments, conducting freeze drying, grinding and sieving for standby use; then subjecting the treated lake sediments to constant temperature heating treatment, then performing cooling, and adding zeolite into the sediments in proportion, mixing the materials evenly, then adding a mixed solution of a salt solution and an alkaline solution, carrying out oscillation impregnation modification, then conducting filtering and cooling to obtain residue, i.e. the sediment modified nitrogen control material. The method provided by the invention adopts lake sediments as the raw materials, the prepared modified nitrogen control material has significantly enhanced ammonia nitrogen adsorption performance, especially has good ammonia nitrogen removal effect on lake sediment interstitial water, the materials are cheap, the safety is high, the social and economical benefits are good, also the material has no ecological risk to lake water, is energy saving and environment-friendly, and can be applied to the lake sediment-water interface nitrogen pollution control field.

The invention discloses a functional composite coated controlled-release fertilizer with a polyolefin wax as a priming coat. The functional composite coated controlled-release fertilizer comprises fertilizer granules and a coating material, wherein the coating material is sprayed to the surfaces of fertilizer granules; the coating material is composed of a polyolefin wax coating, a starch-based polyurethane layer and an epoxy resin layer which are sequentially sprayed to the surfaces of the fertilizer granules; biological stimulin is sprayed between the polyolefin wax coating and the starch-based polyurethane layer or between the starch-based polyurethane layer and the epoxy resin layer. By adopting the functional composite coated controlled-release fertilizer disclosed by the invention, the technical difficulties that a conventional international controlled-release fertilizer is single in function, high in cost and hard to popularize, the controlled-release effect of the fertilizer can be seriously affected by extrusion abrasion in the transportation process, soil pollution can be caused by harmful dyes, sustainable development is hard to achieve as the fertilizer depends on petrochemicals, and excessive residual macromolecule membranes are resulted and are slow to degrade, can be solved, moreover, the problems that the biological stimulin is liable to deactivation when beingin direct contact with soil and fertilizers, release paces of nutrients and stimulin are hard to regulate and control, and the like, can be solved.

The invention relates to a nitrogen controlling material prepared based on lake sediment, a preparation method and application thereof. The preparation method includes: collecting lake sediment as the raw material, conducting freeze drying, grinding and sieving, then carrying out high temperature roasting for certain time, and performing cooling so as to obtain the nitrogen controlling material. According to the invention, lake sediment is adopted as the raw material, and is subjected to heat treatment to prepare the nitrogen controlling material. The nitrogen controlling material comes from lake sediment, not only has low price, but also has high safety, has no ecological risk to lake water, also the high temperature roasted sediment has the characteristics of strong ammonia nitrogen adsorption capacity and weak desorption, thus solving the problems of high cost of ammonia nitrogen controlled release materials, poor ecological safety and limited ammonia nitrogen controlled release effect in the prior art.

The invention discloses a corn slow-release fertilizer. The corn slow-release fertilizer is prepared by uniformly spraying a layer of water-soluble high molecular polymer on the surface of fertilizer particles, and comprises the following ingredients: 8.5-9.5 weight portions of (NH4)2HPO4, 5.5-6.5 weight portions of K2SO4, 30-32 weight portions of large particle urea, 8-10 weight portions of diatomite, and 22-24 weight portions of high molecular polymer. The corn slow-release fertilizer effectively overcomes nitrogen loss caused in fertilizing, increases the utilization rate of nitrogenous fertilizers, benefits the absorption and continuous utilization of crops, fully makes full use of the effects of fertilizers, and simultaneously increases the yield of corn. The corn slow-release fertilizer conforms to the policy guidance of developing energy saving, environment friendly, and continuously efficient agriculture.

The invention discloses biocharcoal-based slow release fertilizer. The biocharcoal-based slow release fertilizer is prepared from biocharcoal and chemical fertilizer with the mass ratio being 20:(5 to10). The biocharcoal-based slow release fertilizer disclosed by the invention has the beneficial effects that agricultural and forest wastes such as straws with wide distribution, large yield and lowcost are adopted as biomass, has rich pore channels, is easily decomposed, is not deteriorated after being absorbed, is wear-resistant, and also has excellent adsorbing and ion-exchange properties, the fertility, the structure and microorganisms and the like of soil can be effectively improved, and the soil quality can be improved; shown from the cumulative released amount of nitrogen of the biocharcoal-based slow release fertilizer in water, the cumulative released amount of the nitrogen in 480 hours is about 80%, i.e., the cumulative released amount of nitrogen nutrients in 20 days is 80%.The invention also discloses a preparation method of the biocharcoal-based slow release fertilizer. The preparation method adopts a hydrothermal method to prepare the biocharcoal-based slow release fertilizer, the technology is manure, the operation is convenient, simple and easy, low cost, less investment and low energy consumption are achieved, and an economic and feasible technical means is provided for large-scale application of the biocharcoal-based slow release fertilizer.

The invention relates to a humic acid type water-retaining slow-release controlled-release organic fertilizer prepared from wastes of sugar mills and alcohol plants. The fertilizer contains active humic acid, a water-retaining agent, an organic fertilizer and a bactericide. The water-retaining slow-release controlled-release organic fertilizer can effectively promote crops to take root and increase production.

The invention discloses a vegetable oil-based polyurethane coated fertilizer and a preparation method thereof. The vegetable oil-based polyurethane coated fertilizer comprises fertilizer particles anda vegetable oil-based polyurethane coating, wherein the modified vegetable oil-based polyurethane coating comprises an inner layer coating, a middle layer coating and an outer layer coating which aresequentially coated from inside to outside; the inner layer coating and the outer layer coating are prepared from a vegetable oil-based polyurethane coating solution, and the middle layer coating isprepared from a vegetable oil-based polyurethane coating solution and nano carbon black. According to the fertilizer and the preparation method disclosed in the invention, nano carbon black which is low in surface energy, low in price and easy to obtain is doped into a plant oil-based polyurethane coating to construct a micro-nano super-hydrophobic coating, so that the plant oil-based polyurethanecontrolled-release fertilizer with an ultralow coating rate is prepared, and the nutrient content of the controlled-release fertilizer per unit mass is increased; the purposes of prolonging the controlled release effect of the coated fertilizer and reducing the dosage of the coating material can be achieved, the cost is relatively low, and the environment-friendly effect is achieved.

The invention discloses a self-assembly and self-repair coated controlled-release fertilizer with loaded functional substances and a method for preparing the self-assembly and self-repair coated controlled-release fertilizer. The method includes loading repair agents and the functional substances in hollow or mesoporous nanometer materials, then wrapping self-assembly materials with the nanometermaterials and allowing the self-assembly materials to be slowly released; adding loaded nanometer materials into coating base solution to obtain coating materials; coating fertilizer granules to obtain the self-assembly and self-repair coated controlled-release fertilizer. The self-assembly and self-repair coated controlled-release fertilizer and the method have the advantages that the coating materials can be reduced by 40-60% under the condition of identical release periods, accordingly, the cost can be lowered, and the self-assembly and self-repair coated controlled-release fertilizer and the method are environmentally friendly and are high in efficiency; the repair agents are added into the self-assembly and self-repair coated controlled-release fertilizer, pores in membrane materialscan be repaired at early stages, and release curves are smooth and steady; the functional substances are further loaded in the self-assembly and self-repair coated controlled-release fertilizer, accordingly, the requirements of crops on nutrients can be met, growth of the crops further can be promoted, the resistance of the crops can be improved, soil conditions can be improved, and the self-assembly and self-repair coated controlled-release fertilizer and the method have broad market application prospects.

The invention provides an acne treatment toner with salicylic acid microcapsules. The acne treatment toner comprises deionized water, xanthan gum, salicylic acid microcapsules, bentonite, propylene glycol, trehalose, glycerinum, menthol, hyaluronic acid and niacinamide. The invention further provides a preparation method of the acne treatment toner. The preparation method comprises the following steps: adding the deionized water and the xanthan gum into a blending container, and performing homogenization till complete dispersion; further adding the bentonite, the propylene glycol, the trehalose, the glycerinum, the menthol, the hyaluronic acid and phenoxyethanol which are blended in advance into the blending container, and performing heating homogenization and stirring; further adding thesalicylic acid microcapsules, and continuously performing constant-temperature stirring; and finally performing cooling to 40 DEG C or lower, adding the niacinamide, performing homogenization stirring, and performing cooling to room temperature, so as to obtain the toner. Due to adoption of the salicylic acid microcapsules, the toner effectively takes an acne treatment effect into play, relieves irritation of salicylic acid to skin, can be directly used on faces and makes face skin clean and tender.

The invention discloses a humic acid type controlled-release nitrogen potassium fertilizer special for crops. The humic acid type controlled-release nitrogen potassium fertilizer is prepared from, byweight, 50-200 parts of polymer-coated urea, 50-200 parts of polymer sulfur coating film urea, 100-200 parts of a resin coated potash fertilizer, 200-300 parts of potassium silicon calcium magnesium humate and 300-400 parts of humic acid compound fertilizer masterbatch. The fertilizer can realize the precise controlled release of nitrogen and potassium at the same time. One-time application of thefertilizer can meet the demand of nitrogen and potassium for crops in different growth periods, and the crop yield and fertilizer utilization rate are remarkably improved. Meanwhile, the humic acid type controlled-release nitrogen potassium fertilizer contains rich humic acid and activated calcium, magnesium, silicon and other trace elements, can greatly improve the quality of crops, resist pestsand diseases, improve soil and alleviate soil acidification, salinization and hardening.

The invention relates to a novel thymalfasin chitosan / beta-cyclodextrin composite microsphere drug delivery system and a preparation method. Chitosan serves as a membrane material, beta-cyclodextrin serves as a clathration material, and a composite microsphere is prepared in a reversed phase suspension-chemical crosslinking method. According to the novel thymalfasin chitosan / beta-cyclodextrin composite microsphere drug delivery system, the composite microsphere carries thymalfasin. According to the novel thymalfasin drug delivery system, the obtained composite microsphere performs good protection and controlled-release functions on the thymalfasin, provides feasibility for oral administration medicines and has good economic benefits and application prospect.

The invention discloses an automobile windscreen film plating agent, and a preparation method thereof. According to the preparation method, environmental friendly dimethyl carbonate is selected as a solvent, fluorosilicone resin, heptafluorodecyl trimethoxysilane are selected as main hydrophobic components, a hydrophobic nano-filler, silicon carbide, and a sound-insulating filler are taken as auxiliary materials or additives. The preparation method includes mixing and stirring, and ultrasonic dispersion. When the automobile windscreen film plating agent is sprayed on an automobile windscreen,a dense hydrophobic protective film layer structure is formed on the surface of the glass, and the film layer is firmly bonded with the glass with the hydrophobic nano-filler with good bonding property at the same time; a small amount of silicon carbide is capable of improving the hardness and wear resistance of the film layer greatly, and achieving excellent hydrophobicity, stain resistance, sound and heat insulation performance, UV resistance and antistatic property; and fine cracks are not caused by long-term wiping and cleaning.

The invention discloses a magnesium-based composite material and a preparation method and application thereof, and belongs to the technical field of biomedical engineering and biomedical materials. The magnesium-based composite material comprises a magnesium-based matrix, and the surface of the magnesium-based matrix is provided with a pore structure; drug-loading particles are loaded on the surface of the magnesium-based matrix, and the skeleton of the drug-loading particles is meso-porous silicon-based particles; mesopores of the meso-porous silicon-based particles contain a drug; the surface of the drug is coated with a first sustained-release film; and a second sustained-release film is coated on the surfaces of the magnesium-based matrix and the drug-loading particles. The magnesium-based composite material provided by the invention can meet the requirements of stable release of the loaded drug in vivo and the like.

The invention belongs to the field of medicines, and particularly relates to a composite nanometer particle obtained by coating curcumin eutectic crystal / piperine with polymers. The composite nanometer particle comprises a core and a shell coating the core, wherein the core is a mixture of the curcumin eutectic crystal and the piperine; the shell is a hydrophilic polymer. The invention further discloses a preparation method and application of the composite nanometer particle. According to the preparation method provided by the invention, the composite nanometer particle with an in-situ coatingstructure is successfully prepared by creatively utilizing a curcumin eutectic crystal compound through a supercritical fluid anti-solvent technology (SAS). The invention provides the composite nanometer particle with the advantages of better dissolution performance, stability and bioavailability.

Coated controlled release fertilizer comprises a fertilizer core and a coat, wherein the fertilizer core is nitrogen fertilizer, and the use amount of the nitrogen fertilizer is 96-97 parts by mass; the coat is a polyurethane material coating the surface of the fertilizer core; the coat is prepared from raw materials in parts by mass as follows: 2.1-2.8 parts of isocyanate, 0.9-2.1 parts of polyalcohol, 0.03-0.15 parts of a curing catalyst and 0.1-0.8 parts of an additive, and the additive is selected from at least one of diaminobenzene phosphate, N-thiophosphoric triamide and acetohydroxamicacid. According to the coated controlled release fertilizer, the controlled release effect of the coated controlled release fertilizer can be effectively improved, the controlled release time of the coated controlled release fertilizer can be prolonged, the fertilizer efficiency is prolonged and loss of nitrogen is reduced.

The invention relates to the technical field of tumor targeted medicaments, and in particular relates to a method for preparing a folic acid coupled chitosan-hydrochloric acid mitoxantrone nano-particle. The method comprises the following steps: 1, mixing a hydrochloric acid mitoxantrone solution with chitosan acetum so as to obtain a mixture solution of chitosan and hydrochloric acid mitoxantrone; 2, adding the mixture solution of chitosan and hydrochloric acid mitoxantrone into a folic acid amino solution, subsequently continuing adding a polysodium phosphate solution into the folic acid amino solution, and uniformly mixing so as to obtain a folic acid-chitosan-hydrochloric acid mitoxantrone microsphere water dispersed system; 3, centrifuging the acid-chitosan-hydrochloric acid mitoxantrone microsphere water dispersed system so as to obtain precipitate, washing the precipitate, and subsequently freezing to dry and obtain the folic acid coupled chitosan-hydrochloric acid mitoxantrone nano-particle. By adopting the method, application of an organic solvent is prevented, the reaction time is greatly shortened, and the prepared nano-particle has a remarkable targeting function on tumor cells, and is good in biocompatibility.

The invention discloses a preparation method of a pyrolin microcapsule, wherein a microcapsule structure is formed by wrapping pyrolin with gelatin. The pyrolin is a traditional Chinese medicine effective component obtained by artificial chemical synthesis and has strong antibacterial activity; the microcapsule is used as a drug carrier, and has many characteristics of drug stability improvement, sustained or controlled release effect, targeted property, high bioavailability and the like superior to those of a traditional preparation; the pyrolin microcapsule can effectively improve the stability of drug preparation, changes the taste sense, and can be applied to a clinical new preparation.