170results about How to "Fast biodegradation" patented technology

A solid drug solution perforator containing drug particles and/or drug-adsorbed or loaded particles with an associated drug reservoir (SSPP system) are provided for delivering therapeutic, prophylactic and/or cosmetic compounds, diagnostics, and for nutrient delivery and drug targeting. For drug delivery, the SSPP system includes an active drug ingredient in particulate form or drug adsorbed on the particle surface in a matrix material that dissolves upon contact with a patient's body. In a preferred method of transdermal drug delivery, an SSPP system containing a drug-adsorbed microparticle penetrates into the epidermis or dermis, and the drug is released from the (dissolving) SSPP system perforator and desorbed from the particles. An additional drug is optionally delivered from a patch reservoir through skin pores created by insertion of the perforator Formulation and fabrication procedures for the SSPP and associated reservoir are also provided. An SSPP system can be fabricated with variety of shapes and dimensions.

Composite spherical projectiles are provided for shotgun cartridges which are environmentally compatible, relatively inexpensive and have ballistic properties similar to lead shot or projectiles and which consist of metal particles dispersed in a biogradable polymeric solid matrix which includes a hydrocarbon binder containing ester functional groups which are linked to C1-20 aliphatic hydrocarbon chains, starch, and titanium dioxide.

The invention discloses a complete biodegradation foam material and a preparation method thereof; the complete biodegradation foam material mainly comprises polyhydroxy alkanoate, starch and foaming agent; the complete biodegradation foam material is characterized in that: the complete biodegradation foam material does not comprise polylactic acid, and 20-80 parts of the polyhydroxy alkanoate, 20-60 parts of starch and 0.5-5 parts of the foaming agent are included by weight. The foam material takes the starch and the polyhydroxy alkanoate as main raw materials, has good physical properties, can carry out complete biodegradation and greatly reduces the manufacturing cost of the foam material.

The invention belongs to the technical field of environmental protection science and engineering, and in particular relates to a biological aerated filter for sewage treatment and a process. The biological aerated filter adopts a mode of two-stage series connection; a filter plate is arranged in the biological aerated filter; support layers are arranged on the filter plate; a first stage positioned above the support layers is provided with fillings; a second stage positioned above the support layers is provided with the fillings; an air pipe is arranged between the filter plate and the supportlayers; the upper part between the two stages of the biological aerated filter is provided with a water pore; the bottoms of the two stages of the biological aerated filter are provided with perforation spoil disposal pipes; a water inlet pipe is arranged at the lower part of the filter plate through the first-stage biological aerated filter; a back flush water inlet pipe and an outlet pipe are arranged at the lower part of the filter plate through the second-stage biological aerated filter, and a back flush outlet pipe is arranged at the upper part of the filter plate. The biological aeratedfilter has the process technology for sewage treatment with less land occupation, investment saving, low operating cost, high efficiency and convenient operation and management, and can be widely applied to the sewage treatment.

The invention discloses a biodegradable composition and a preparation method thereof, which consist of a biodegradable homopolyester (A), a biodegradable copolyester (B) and a chain extender (C), the total weight of which is 100 parts by mass Calculated, containing (A+B) is 95.0~99.9 parts and containing C is 0.1~5.0 parts, wherein the ratio of A:B is in the range of 1:9~9:1. The present invention finds that the compounding of biodegradable homopolyester with faster biodegradation rate and biodegradable copolyester with better processability in different proportions can not only endow the composition with proper biodegradation rate, but also improve the composition The physical properties and processing performance can be properly adjusted according to the requirements of different processing and application fields; we also found that by introducing a chain extender with long chain characteristics into the biodegradable resin composition, the combination after chain extension can be avoided It can prevent unnecessary gel phenomenon during processing and improve the heat resistance and stability of the material.

A tree shelter includes a biodegradable fibrous mat coated with a degradable resin and adapted to be formed into a roll which can enclose at least the lower part of a plant. The mat is preferably non-woven and its structure is preferably impregnated with a second degradable resin which degrades at a different, preferably faster, rate to that of the first degradable resin under the same environmental conditions. Such a shelter has the advantage that once the first resin has substantially degraded over a predetermined time period to expose the mat to the weather, the second degradable resin commences a faster degradation to cause the mat to decompose rapidly into a loose fibrous state and ultimately form a beneficial mulch around the stem or trunk at the base of the plant.

The present invention relates to a suspension emulsion gel loaded with fat-soluble vitamins and a preparation method thereof, and belongs to the technical field of food processing. The suspension emulsion gel comprises the following components in parts by weight: 1-10 parts of fat-soluble vitamins, 1-10 parts of vegetable proteins, 0.5-3 parts of polysaccharides and 30-60 parts of vegetable oil rich in unsaturated fatty acids. The preparation raw materials are cheap in source, safe, good in biocompatibility, fast in biodegradation and easy for modification. The prepared suspension emulsion gelhas good stability, is simple in technology, low in cots, safe, environmentally protective, good in product stability and high in bioavailability, can be used in various foods to enhance sensory value, edible value and nutritional value, and can also be used for preparing healthy functional foods or healthy accessory ingredients.

The invention provides a preparation method of a degradable gas hydrate efficient accelerant. The accelerant is prepared by three substances including rhamnolipid, sodium carbonate (NaCO3) and sodium chloride (NaCl) according to a certain ratio. The using mass concentration of the accelerant is 0.05-2%. The preparation method can be applied to generation acceleration research of the gas hydrate, greenhouse gas collection such as CO2 by a hydration method and fields such as gas hydrate separation technology. The preparation method is processed in a high-pressure reactor; the gas is provided by a high-pressure gas cylinder; the gas is introduced into the reactor by a pneumatic booster pump; the temperature and the pressure are displayed by a transmitter; and the reaction situation is recorded in real time by a data acquisition system through a camera. As a degradable biological surfactant used for the accelerant is very environment-friendly, the accelerant does not influence the environment and is low in cost, low in dosage, good in the acceleration effect, and beneficial to hydrate industrial production.

The invention relates to the field of medicinal macromolecular materials, in particular to the application of a tri-block copolymer in the preparation of a medical anti-blocking material, aiming to provide a new choice for using the medical anti-blocking material in the field. A technical scheme of the invention is to provide the application of the polycaprolactone-polyethyleneglycol- polycaprolactone (PCL-PEG-PCL) tri-block copolymer in the preparation of the medical anti-blocking material, wherein the PCL-PEG-PCL copolymer has a molecular weight ranging from 1,500 to 8,000, the ratio of themolecular weight of the PEG chain segment to that of the PCL chain segment ranges from 0.2 to 2.5. The copolymer can be dissolved in water to form a solution and can form when a certain concentrationis achieved. Experiments show that the hydrogel of the PCL-PEG-PCL block copolymer can effectively prevent post-operation adhesion, thereby the invention provides a new choice for this field.

The preparation method of stellera chamaejasme ketone pesticide includes: cleaning stellera chamaejasma, pulverizing, soaking in organic solvent, extracting for several times, concentrating to obtain stellera chamaejasme ketone extract, its extracting temp. is 30-95 deg.c and time is 2-10 hr., then placing 10-55 portions of said extract, 0-5 portions of nimbin, 0-12 portions of said extract, 0-5 portions of nimbin, 0-12 portions of leonurus alkaloid and 15-55 portions of organic solvent into the mixing still with stirring device and thermometer, stirring at 40-100 deg.c and mixing for 0.5-5 hr., adding surfactant 8-16 portions, theasaponin 2-30 portions, azone 0.2-2 portions, stabilizing agent 3-11 portions, preservative 0.5-1.5 portions and pH regulating agent 0.1-0.2 portion, and continuously stirring and uniformly mixing.

The invention relates to the technical field of modification of thermoplastic high molecular materials, and discloses a degradable PC (Poly Carbonate)/PLA (Poly Lactic Acid) alloy which is applied to the aspects of household appliances, living goods, electronic and electrical equipment and the like. The degradable PC/PLA alloy is prepared from the following materials: PC, PLA, compatilizer, antioxidant, nucleating agent, ester exchange accelerator and processing aid. The invention also discloses a preparation method of the degradable PC/PLA alloy. The invention aims to provide a degradable PC/PLA alloy which can be degraded on the basis of ensuring good comprehensive performance, thereby reducing the pollution to the environment. The invention also aims to provide a preparation method of the degradable PC/PLA alloy.

The invention discloses an environment-friendly degradable-type halloysite nano-tubes/polyethylene film material which is composed of, by weight, 60-70 parts of linear low-density polyethylene, 8-15 parts of waxy corn starch, 8-15 parts of plant fiber powder, 3-6 parts of a silane coupling agent, 25-35 parts of a degradable calcium carbonate master batch, 10-18 parts of vinyl-terminated silicon oil, 0.3-0.8 parts of hydrogen-containing silicon oil, a proper amount of a sulfuric acid solution, a proper amount of a platinum catalyst, 10-15 parts of halloysite nano-tubes, 8-12 parts of white carbon black, and a proper amount of anhydrous ethanol. The polyethylene film material, after use, can be naturally decomposed into water and CO2 within 6-18 months, is high in biodegradation speed without generation of white pollution, and satisfies environment protection demand. The white carbon black and the modified halloysite have cooperative effects to form a special dual-filler net structure, so that the film material is significantly improved in tensile strength, stiffness and the like.