23 results about "Biodegradable coating" patented technology

Permafrost thawing prevention may involve deploying a cooling geotextile onto a permafrost soil. The geotextile may include a biomass scaffold comprising natural plant-based fibers. The geotextile may further include a cellulose layer comprising cellulose fibers laminated onto the biomass scaffold such that the cellulose fibers are physically entangled with the plant-based fibers. The geotextile may further include a hydrophobic and biodegradable coating which defines at least one surface of the geotextile. The geotextile may be optically opaque, exhibits high solar reflectivity, and maintains high mid-infrared emissivity to enable passive radiative cooling.

The invention relates to a time sequence degradable orthopedic implant material which comprises a base material and a biodegradable coating formed on the surface of the base material, the surface of the base material is provided with a nanocone array microstructure, the biodegradable coating takes a biodegradable polymer as a matrix and loads a metal element for promoting bone repair, and the metal element is a metal element for promoting bone repair. And the surface of the biodegradable coating is also connected with an anti-inflammatory active factor. According to the invention, grafted anti-inflammatory active factors are matched with the biodegradable coating loaded with metal elements for promoting bone repair, and the sequential active regulation and control of the biological effect of the micro-morphology on the surface of the base material cope with effector cells in different repair stages; the time sequence regulation and control on the macrophage inflammation phenotype and bone marrow mesenchymal stem cell osteogenic differentiation in different stages of bone repair are realized, so that each stage of bone tissue repair is matched, and bone repair and osseointegration are promoted.

A granular composition for agricultural is disclosed. The granular composition is made up of a plurality of granulates having a biodegradable coating applied over the granulates. The granulates are selected from the group consisting of seeds, fertilizers, and pesticides. The biodegradable coating is made up of polylactic acid and polyhydroxyalkanoates. A method for making the coated granular composition and a method for controlled release of the granular material in the field are also disclosed.

The invention relates to an environment intelligent response type easily-degradable coated controlled-release fertilizer for dry farmland and a preparation method of the easily-degradable coated controlled-release fertilizer. The easily-degradable coated controlled-release fertilizer is prepared by uniformly spraying a layer of controlled-release coating material which is sensitive to temperature and humidity on the surfaces of urea or compound fertilizer particles. The coating material is prepared from a temperature and humidity dual-sensitive composition and an interpenetrating network polymer through an emulsion interfacial polymerization reaction under a heating condition. The temperature and humidity double-sensitive composition is formed by molecular self-assembly of a temperature and humidity low-sensitive organic material and a temperature and humidity high-sensitive organic material; the invention fundamentally solves the problem that the controlled-release fertilizer is difficult to release at low temperature and drought in spring and quick to release at high temperature and high humidity in summer on dry field crops, is more accurate in nutrient supply and demand matching, can realize that the fertilizer is only applied once per plant under the condition of high and stable yield of the dry field crops, and can meet the requirements of simultaneous sowing of seed and fertilizer and lateral deep fertilization; the method has the outstanding advantages of time saving, labor saving, fertilizer saving, easy degradation of the membrane material, environmental friendliness and the like, and has a very wide application prospect.

The leak stoppage material may include a plurality of self-aggregating particles having a degradable coating, where the self-aggregating particles are capable of binding into a plurality of aggregated particles via mechanical interaction, electrical interaction, magnetic interaction, chemical interaction, or any combination thereof. The aggregated particles have a larger effective size and are capable of sealing large openings / bores underground that result in cyclic leakage during wellbore drilling operations.

The invention discloses a self-locking suture line and a tension regulator, and relates to the field of medical instruments.The self-locking suture line comprises a self-locking suture assembly, the self-locking suture assembly comprises a suture line body, a suture line weaving groove is formed in the suture line body, and a plurality of weaving lines are arranged in the suture line weaving groove; a grading barb unit is arranged outside the suture line main body, a suture needle is arranged at one end of the suture line main body, and a biodegradable coating is sprayed on the surface of the suture line main body. According to the self-locking suture line and the tension regulator, through the height increasing design of the grading barb units, the self-locking suture line and the tension regulator can adapt to different tissues from low density to high density, the problem that a traditional suture line is not firmly anchored in a single tissue or damages the tissue is solved, the application scene is expanded, and the tension of the suture line can be automatically regulated through the tension regulator.

The invention belongs to the technical field of cardiovascular repair, and discloses a biodegradable vascular stent material for cardiovascular repair. The material comprises a medical stainless steel intravascular stent body and a composite coating coated on the surface of the medical stainless steel intravascular stent body. The inner layer contains RGD peptide modified chitosan derivatives and polyphenol substances, is used for promoting adhesion and proliferation of endothelial cells and has anti-inflammatory and anti-oxidation effects. The outer layer is a ginsenoside (MPEG)-PLGA microsphere loaded with heparin sodium, and is prepared by carrying out hydrophobic modification on ginsenoside through (2-allyl) succinic anhydride and carrying out co-loading with MPEG-PLGA, so that synergistic controlled release of anticoagulation and vascular repair promoting drugs is realized. The excellent mechanical property of the stainless steel stent is combined with the multifunctional biodegradable coating, and through the synergistic effect of the inner layer and the outer layer, endothelialization can be accelerated, smooth muscle hyperplasia can be inhibited, inflammatory response can be relieved, thrombosis can be prevented, and therefore the risk of restenosis and advanced thrombosis in the stent can be effectively reduced.

The present invention relates to a biodegradable coating composition, a method for preparing the same, and a biodegradable article using the same. In particular, according to an embodiment of the present invention, the biodegradable coating composition is a copolymer polyhydroxyalkanoate (PHA) resin including a PHA resin, a surfactant, inorganic particles, and a rheology modifier, and includes 4-hydroxybutyrate (4-HB) repeating units. By using a PHA resin having a weight average molecular weight of 10,000 g / mol to 12,000,000 g / mol, the biodegradable coating composition is environmentally friendly due to excellent biodegradability and biocompatibility, and can have improved dispersibility, coating properties, oil resistance, and processability.

The present invention relates to a solution for producing a biodegradable coating, to a process for producing same, to a process for coating a substrate with the solution according to the invention, and to a coated article produced according to said process.

Biocompatible compositions, in particular for the preparation of a biodegradable coating for medical articles, include a biocompatible thickening polymer and a chitosan derivative comprising D-glucosamine units of the following formula (I):wherein X is an alditolic or aldonic polyol residue of the following formula (II):wherein:R is CH2 or CO;R1 is hydrogen, a monosaccharide moiety or an oligosaccharide moiety;R2 is OH or NHCOCH3.The present invention also relates to uses of the disclosed compositions, to a kit of parts including a composition in powder form and to a method for the preparation of a biocompatible composition in gel form.The biodegradable coating shows a good and long-lasting adhesion to the surface of a medical article and allows to improve both the coating operations and the effectiveness in preventing any biofilm formation on the medical article.

Passive devices for non-invasive gastrointestinal sampling are disclosed. In some embodiments, a capsule device includes a capsule housing with a sampling aperture and a biodegradable coating that seals the sampling aperture. The biodegradable coating may be disposed within the sampling aperture. The capsule contains an absorbent sampling hydrogel and a sealing member between the sampling hydrogel and the sampling aperture. The capsule is ingested by a patient. Once the capsule reaches a desired location in the gastrointestinal tract, the biodegradable coating dissolves to allow gastrointestinal fluid into the capsule to be absorbed by the sampling hydrogel. Absorption of the fluid causes the sampling hydrogel to expand, thereby pressing the sealing member against the sampling aperture to seal the capsule. In some embodiments, the biodegradable coating may have multiple layers that may dissolve at different locations in the gastrointestinal tract to facilitate targeting of particular locations, for example the colon.

The invention relates to the technical field of tableware processing, in particular to a modified rice hull powder-straw residue composite degradable food-grade chopstick and a preparation method thereof.The modified rice hull powder-straw residue composite degradable food-grade chopstick comprises a chopstick base material, wherein core raw materials of the chopstick base material are rice hull powder and straw residues which are subjected to citric acid-KH560 dual modification treatment; wherein the citric acid modification ratio of the rice hull powder to citric acid is 10: 1; the food-grade bonding and reinforcing system comprises xanthan gum, flour, wood pulp boards and warm water and is used for mixing and molding the modified rice hull powder and the straw residues to form a stable green body; the PLA degradable coating is coated on the surface of the chopstick base material and is used for improving the wear resistance, smoothness and overall attractiveness of the surface of the chopstick. According to the invention, high-valued utilization of the rice hull powder is realized through chemical modification, the application bottleneck of agricultural and forestry wastes in the tableware field is broken through, the problem of poor consistency of mass-produced products is solved through standardized modification process parameters and raw material ratio, and the defective rate is reduced; the modified rice hull powder and the straw residues are used as core raw materials, so that the consumption of traditional resources is reduced.

This invention provides a heat-resistant, migration-resistant, and moisture-adhesive starch-based material. By weight, the starch-based material comprises the following components: 60-85 parts natural starch, 3-8 parts composite crosslinking agent, 5-12 parts heat-resistant modified filler, 8-15 parts low-migration composite plasticizer, 2-6 parts moisture-adhesive functional regulator, 0.5-2 parts coupling agent, 0.3-1.5 parts antioxidant stabilizer, and 30-60 parts deionized water. This invention also provides a preparation method and application of the starch-based material. Through oxidative crosslinking composite modification, functional additive compounding, and three-dimensional network structure reconstruction technology, this invention constructs a dense and stable crosslinked network, effectively inhibiting the migration and precipitation of small molecule additives, significantly improving the material's high-temperature thermal stability and resistance to moisture-heat aging, while simultaneously endowing the material with durable and controllable moisture adhesion properties. The preparation process of this invention is simple, the raw materials are inexpensive and readily available, and the material is green and biodegradable. The resulting material can be widely used in food packaging, composite adhesives, medical bonding materials, daily-use moisture-adhesive products, and biodegradable coatings.

A biodegradable coated paper product comprising a paper substrate and a layer disposed on the paper substrate wherein the layer is formed from a biodegradable coating composition comprising: a. A cellulose ester which is cellulose acetate propionate (CAP) in an amount of 5.5 to 15 weight percent based on the total weight of (a), (b) and (c); b. A biodegradable polymer which is a polyester in an amount of from 45 to 75 wt% based on the total weight of (a), (b) and (c); and c. An inorganic filler in an amount of 12 to 40 wt%, based on the total weight of (a), (b), and (c); wherein the polyester is selected from the group consisting of poly (butylene succinate) (PBS), poly (butylene succinate adipate) (PBSA), polycaprolactone (PCL), poly (butylene adipate terephthalate) (PBAT), polylactic acid (PLA), and combinations thereof.

The present application relates to corrugated paperboard production equipment technical field, specifically, a kind of degradable corrugated paperboard and its preparation process, including finished paperboard, the finished paperboard includes two upper and lower parallel face paper layers, the core paper layer being arranged in the inner side of two face paper layers, biodegradable coating is sprayed on the bottom surface of core paper layer, glue block is adhered to the end position of core paper layer and two adhering layers are adhered to the central position.The degradable corrugated paperboard and its preparation process, additional spraying biodegradable coating in finished paperboard, change the physical and chemical properties of corrugated paperboard, enhance the hydrophilicity and hygroscopicity of corrugated paperboard, so that it is easier to be decomposed by microorganism, meanwhile, biodegradable coating can also provide the place for microorganism attachment and reproduction, accelerate the decomposition speed of corrugated paperboard in subsequent recycling.

The invention belongs to the field of functional textile materials, and provides a waterproof and moisture-permeable woven fabric based on biodegradable polyester and a preparation method of the waterproof and moisture-permeable woven fabric. According to the invention, a three-layer collaborative design of collaborative adhesion of the dopamine initiation layer, precise pore forming of the microporous degradable coating and super-hydrophobicity of the fluorine-free alkyl silane water-repellent layer is adopted, and the initiation layer with the surface density of 5-25mg. M <-2 > is formed through self-polymerization deposition of dopamine under an alkaline condition, so that interface adhesion is enhanced; polybutylene succinate is used as a matrix, a pore-foaming agent is eluted to form a microporous coating with the pore diameter of 80-200 nm and the porosity of 35-55%, high moisture permeability is achieved, then alkyl silane is condensed to construct a low-surface-energy water-repellent layer, and the excellent waterproof and moisture-permeable performance that the hydrostatic pressure is larger than or equal to 12 kPa and the evaporation method moisture-permeable amount is larger than or equal to 9000 g.m <-2 >. 24 h is achieved. The three contradictions of strength and moisture permeability, hydrostatic pressure and water vapor flux and interface adhesion and super-hydrophobic stability in biodegradable fabrics are solved, and the biodegradable fabric has the characteristics of environmental protection, degradability, excellent performance and good durability, and has wide application value.

Described herein are coated agricultural compositions comprising: an active agent; and a hard, hydrophobic coating surrounding the active agent, the coating comprising Portland cement and a fatty acid, optionally further comprising an additive selected from the group consisting of a biodegradable polymer and a biodegradable wax. Optionally, the fatty acid in the coating is between 15%-45% of the coating by weight. Further described herein according to embodiments, are methods for coating active agents comprising obtaining an active agent; and contacting the active agent with Portland cement and a fatty acid.

The techniques provide for non-invasive gastrointestinal sampling. In some embodiments, a device includes a capsule housing bounding a cavity, a sampling aperture formed in the capsule housing and providing fluid communication between the cavity and an exterior of the capsule housing, a luminescent substrate layer positioned within cavity, the luminescent substrate being configured to emit a luminescent light upon exposure to a sample fluid containing a luminescing trigger, and at least one additional substrate layer positioned within the cavity between the sampling aperture and the luminescent substrate, each of the at least one additional substrate layers being configured to chemically interact with the sample fluid. The device also includes a photodetector positioned within the cavity, the photodetector configured to detect the luminescent light, and a biodegradable coating closing the sampling aperture such that degradation of the biodegradable coating exposes the sampling aperture to permit fluid flow into the cavity.

A beverage cartridge and method for forming a beverage cartridge. A cup may be made of cellulose fibers. A liner may be provided at the inner space of the cup. The cup may define an interior space that is closed by a lid. A filter may be attached to the liner and / or lid. A biodegradable coating may be applied to an outer surface of the cup, the outer coating being impervious to moisture and gases, e.g., to protect a beverage material in the interior space.

This invention discloses a PLA coating composite material, its preparation method, and its application, belonging to the field of coated paper technology. The composite material comprises the following raw materials in parts by weight: 70-80 parts of polylactic acid; 20-30 parts of bio-based toughening component; 15-25 parts of cationic filler; 2-4 parts of heat-resistant compatibilizer; and 1 part of nucleating agent TMC-3001. The heat-resistant compatibilizer is a terpolymer formed by norbornene imide, 1,6-hexanediol diacrylate, and glycidyl methacrylate. The PLA coating composite material provided in this application constructs an "organic-inorganic" dual reinforcement system through the synergistic effect of the heat-resistant compatibilizer and the cationic filler, which not only strengthens the material's intrinsic properties but also improves the interfacial bonding strength between the coating layer and the paper. Ultimately, a fully biodegradable coating material with high heat resistance, excellent flexibility, and strong interlayer bonding is obtained. This fully biodegradable coating material is suitable for preparing heat-resistant coated paper products.

This invention discloses a biodegradable coating liquid for coated paper bags and its preparation method, belonging to the field of environmentally friendly packaging materials technology. The coating liquid, by weight, comprises the following components: 35-45 parts modified polylactic acid (PLA); 20-28 parts polybutylene adipate / terephthalate (PBAT); 1.5-3.0 parts nanocellulose whiskers; 4.0-7.0 parts oxidized starch@chitosan graft; 3.0-5.0 parts tributyl acetylacetonate; 1.0-2.5 parts glycerol; 0.8-1.5 parts epoxidized soybean oil; and silane coupling agent KH560. 0.3-0.8 parts; antioxidant 0.2-0.5 parts; environmentally friendly mixed solvent to make up to 100 parts; wherein, the modified polylactic acid is hydroxyl-terminated polylactic acid, obtained by ring-opening polymerization of lactide and 1,4-butanediol, with a molecular weight of 20,000-35,000; the nanocellulose whiskers have a diameter of 20-50 nm and a length of 200-500 nm; the environmentally friendly mixed solvent is a mixture of ethyl acetate, γ-butyrolactone, and anhydrous ethanol. This invention uses a modified PLA+PBAT two-component compound to balance strength, flexibility, and heat-sealing properties, overcoming the defects of single resins.

The present invention relates to biodegradable coatings, particles coated with such biodegradable coatings, and methods of making such coatings and coated particles. The coating having urethane bonds, urea bonds, or a combination thereof can be degraded over time with a microbial powder or solution applied between the particles, between layers of the coating, or on top of the coating.

Disclosed are compositions and methods for food packaging materials, more specifically biodegradable and edible food coatings including (1) a biological material extract such as a seaweed extract; (2) a vegetable oil or an algal oil, or a combination thereof; and (3) a plant extract / s such as a spice extract or an essential oil or emulsifier. Methods for making seaweed extract and improving the shelf life and marketability of perishable biological materials are also disclosed.