260 results about "Biopolymer" patented technology

The invention discloses a gas separation membrane and a preparation method thereof, and belongs to the technical field of gas separation membranes. The gas separation membrane comprises a separation layer comprising a network and PTI nanosheets dispersed in the network, the network comprising at least one of a biopolymer network and a chemical polymer network; selectively, the device further comprises a supporting layer which is arranged below the separation layer and is combined with the separation layer. The preparation method of the gas separation membrane comprises the following step A or step B: step A: enabling raw materials of PTI nanosheets and networks to form a membrane on the surface of polymer hydrogel to obtain the gas separation membrane; and step B, enabling the PTI nanosheet and the network raw material to form a membrane on the surface of the material of the support layer to obtain the gas separation membrane. The gas separation membrane provided by the invention is an N2 preferential permeation membrane, and has relatively high N2 permeation rate and relatively high N2 / CO2 selectivity.

Method for generating a porous injectable scaffold that includes providing a liquid composition of 2 phases at a temperature below 25° C., of Newtonian behavior, where the composition comprises:a liquid dispersant phase at room temperature formed by a gelatin with a low melting point, less than 15° C., functionalized with methacryloyl or methacrylamide groups; and a photoinitiator;and a dispersed phase, of microdroplets or beads in solid state, of a gelatin solution with a melting point greater than 25° C.;initiating the polymerization of the dispersing phase by light radiation; raising the temperature to 35-40° C. and allowing melting of the dispersed phase; and obtaining a porous scaffold.The formed porous scaffold and its use as a biological support for tissue regeneration / generation; as a biological matrix as a support for cells, for cell invasion; as an acellular biological matrix, a biological matrix as a mechanical support and / or a biological matrix for active components.

Methods of making bioactive compound-loaded nanoparticles are provided. The methods harness naturally-occurring biopolymers to produce nanoparticles from raw plant materials. Methods include contacting plant-derived materials with alkaline solution with agitation to deprotonate the bioactive materials and biopolymers to form nanoparticles. In some forms, the methods contact the nanoparticle with an acid to re-protonate the components and more stable nanoparticles. The bioactive compounds can be extracted from raw plants and / or plant parts, including turmeric, ginger, clove, thyme, pepper, and rosemary. The bioactive compounds include curcumin, gingerols, shogaols, eugenol, thymol, carvacrol, capsaicin, and rosmarinic acid. Compositions and formulations containing bioactive-compound loaded nanoparticles are also provided.

The application provides a silk fibroin microsphere and a preparation method and application thereof, and belongs to the technical field of biopolymer microsphere preparation. The preparation method comprises the following steps: 1) adding an ionic dispersing agent into a silk fibroin solution, uniformly mixing, then adding a sphere forming agent into the solution, and obtaining a pretreated liquid after mixing; 2) performing low-temperature coagulation treatment on the pretreated liquid, and obtaining a silk fibroin microsphere solution after thawing; 3) diluting the silk fibroin microsphere solution, then performing wet heat crystallization treatment, and obtaining a high-crystallinity silk fibroin microsphere solution; and 4) performing spray drying on the high-crystallinity silk fibroin microsphere solution, and obtaining a solid silk fibroin microsphere. The silk fibroin microsphere obtained by the application has excellent biocompatibility, degradability and good mechanical properties. The silk fibroin microsphere prepared by the method of the application is regular spherical, has high crystallinity, slow degradation speed, is not easy to absorb moisture and adhere, and can be stored for a long time; and the preparation method is simple and has high yield.

Provided herein are biopolymers comprising repeating polysaccharide units, preparations of biopolymers, and ophthalmic compositions comprising biopolymers, as well as methods of use.

This invention belongs to the technical field of oil and gas field development and enhanced oil recovery, specifically relating to a bio-based ternary composite enhanced oil recovery system and its preparation method. The bio-based ternary composite enhanced oil recovery system of this invention, by weight, comprises: 800-2000 parts of biopolymer; 600-3000 parts of biosurfactant; 40-400 parts of bionanomaterials; and 200-800 parts of water. In the bio-based ternary composite enhanced oil recovery system provided by this invention, the composite enhanced oil recovery system of biopolymer, biosurfactant, and bionanomaterials fully leverages the synergistic effect of each component, demonstrating significant advantages in improving crude oil recovery and reducing environmental risks, and possessing good industrial application prospects and promotional value.

The present invention is directed to fluorine-free firefighting foams containing one or more biopolymers. The biopolymers of the compositions of the present invention include for example, diutan, guar, xanthan, scleroglucan, and combinations thereof.

The present invention relates to a method for functionalizing a biopolymer having an -OH group or an -NH2 group by reacting the biopolymer with at least one compound having at least one C=C bond or C≡C bond and containing a chromophore that absorbs UV-Vis radiation directly adjacent to this bond. The present invention also relates to a method for obtaining a solid biopolymer material by reversibly crosslinking the functionalized biopolymer obtained by the above method under UV-Vis light irradiation. Furthermore, the present invention relates to the use of functionalized biopolymers as support materials for 3D bioprinting, or as materials for manufacturing structures selected from spheroids, organoids, artificial organs, coatings, and tissue models.

The invention relates to the technical field of medical biopolymer materials, in particular to a two-component gynecological gel spray and a using method thereof.The two-component gynecological gel spray comprises a first component and a second component, and the first component at least comprises formylated multi-arm polyethylene glycol, formylated poloxamer and a solvent; the second component at least comprises a multi-amino polymer solution, the bi-component solution forms a film in the vagina and is cured in situ, and the vaginal gel has the characteristics of strong adhesion and strong corrosion resistance, can act on the vagina for a long time to realize long-acting treatment, and is more convenient to use and better in effect.

To provide a system including novel nanopores having different structures and recognition sites that improve sequencing accuracy and / or provide different error profiles.SOLUTION: Provided are systems relating to the field of nanopores and their use in various applications, e.g., analysis of biopolymers and macromolecules, typically by making electrical measurements during translocation through the nanopore, comprising a funnel-shaped proteinaceous nanopore comprising alpha-helical pore-forming toxins that are members from the actinoporin family of proteins, more particularly Fraga Ceatoxin C (FraC), a variant FraC, a FraC paralog or a FraC homolog.SELECTED DRAWING: None

The article is made from a biodegradable biopolymer.

The invention discloses a degradable fruit and vegetable fresh-keeping composite material based on multi-mechanism synergy and a preparation method thereof, and belongs to the technical field of food packaging materials, the degradable fruit and vegetable fresh-keeping composite material comprises the following components by weight: 35-45 parts of a biopolymer matrix, 12-18 parts of mechanical reinforced fiber, 18-25 parts of an ethylene catalytic scavenger, 8-12 parts of a slow-release preservative, 4-6 parts of glycerin, and 1.5-2.5 parts of citric acid; the preparation method comprises the following steps: respectively preparing the ethylene catalytic scavenger and the slow-release preservative; constructing basic gel; the functional components are uniformly dispersed in the gel, and the composite membrane material is prepared through curtain coating, drying, crosslinking and ultraviolet post-treatment. Through collaborative design of carrier loading, molecular embedding and nano-enhancement, efficient removal of ethylene, long-acting slow release of antibacterial and antioxidant activity, remarkable improvement of mechanical properties and unification of all-component biodegradation are realized, the shelf life of fruits and vegetables is effectively prolonged, and the preparation method is suitable for preparation of green packaging products.

The invention relates to a biopolymer asphalt substitute. The biopolymer is non-plant-based. A significant amount of the biopolymer can be included in the blend with the asphalt without substantially altering or modifying the (viscoelastic) properties of the blend.

In one aspect, the disclosure relates to multilayer composite films comprising a first biopolymer such as agarose, and a second biopolymer such as shellac. In the films, one or both layers may further comprise a biodegradable plasticizer. In a further aspect, the films can be flat or can be thermoformed to have a three-dimensional shape. The films are biodegradable and have very low permeability to water, gases, and other contaminants. Also disclosed are methods of making the films and consumer product packaging materials comprising the films.

The article is made from a biodegradable biopolymer.

Orally administrable nanoparticle complexes of biological molecules and biopolymers are described herein, and include formulations for the oral administration of peptides, proteins, nucleic acids, and antibodies.

The present invention describes capsule compositions consisting of crosslinked chitosan, beta-glucan or alginate, and encapsulates an environmentally compatible ingestible larvicide, especially larvicidal agents such as essential oils or other ingestible larvicides such as Bacillus thuringiensis which are lethal to the larvae of pest insects, especially mosquito larvae.

This invention provides a method for preparing a composite polymer electrolyte membrane, mainly comprising the following steps: mixing lignin derivatives, a polymer matrix, lithium salts, and an organic solvent in a certain proportion to obtain a uniform slurry with a certain viscosity; dripping the uniform slurry onto a glass plate, coating it to a certain thickness, and then placing it in a vacuum drying oven for drying at a specific temperature and vacuum level to obtain the composite polymer electrolyte membrane. Studies have found that the composite polymer electrolyte membrane obtained by this invention has excellent film-forming properties, stable structure, and exhibits high lithium-ion transference number and high room-temperature ionic conductivity.

The present invention relates to the synthesis and production of biopolymer from natural waste - the husk of coconut and / or coir pith powder. More specifically it pertains to a novel multi-functional biopolymer obtained from the husk of coconut and / or coir pith powder, the fruit of Cocos nucifera with combinations of copolymer, crosslinker, and plasticizers for use in pharmaceutical, nutraceutical, cosmeceutical and leather industry. Lignin component from coconut husk was extracted, purified, studied for their physicochemical properties and processed into various biopolymers to be used as burn wounds dressings and leather substitutes.

Nanoscale silk layers on semiconductors enable the construction of transistors that can switch between ionic or dielectric behavior, and enable a new class of hybrid functional devices in which semiconductor and biopolymer technologies coexist, leveraging their respective strengths. The device may include a first layer, which is conductive or semiconducting. The device may include a regenerated amphiphilic protein layer on the first layer, the regenerated amphiphilic protein layer being structured such that, in a first hydration state of the regenerated amphiphilic protein layer, a first electric double layer (EDL) is formed at the interface between the first layer and the regenerated amphiphilic protein layer.

The invention relates to the technical field of workover fluids, in particular to an ultralow-density leakage-proof workover fluid and a preparation method thereof.The ultralow-density leakage-proof workover fluid is obtained according to the following method that firstly, a structural stabilizer, a tackifying filtrate reducer, a pH regulator, a bactericide, a corrosion inhibitor and a surfactant are sequentially added into water to be evenly stirred to obtain a base fluid, and then the ultralow-density leakage-proof workover fluid is obtained. Sequentially adding the foaming agent and the foam stabilizer into the water, foaming by adopting a foaming machine to obtain foam liquid, and finally adding the foam liquid into the base liquid and uniformly stirring to obtain the foaming agent. According to the invention, the raw material structure stabilizer and the tackifying filtrate reducer are polysaccharide biopolymers, so that the viscosity-improving and cutting-improving effects are good, the natural degradation period is short, and the damage to a reservoir is small; the ultralow-density leakage-proof workover fluid prepared by taking the structural stabilizer and the tackifying filtrate reducer as main raw materials can be suitable for well killing and workover operations of various oil and gas wells with formation pressure coefficients lower than 1.0.

The present invention relates to a home compostable biopolymer for injection moulding and the process for preparing the same. Moreover, the present invention provides a home compostable biopolymer for injection moulding wherein the said biopolymer comprises starch, vegetable oil derivative, compostable polyester resin, natural fillers, lubricant and compatibilizer. The present invention is to provide a home compostable biopolymer that easily disintegrates in nature.

A composition may be or include detergents, cleaning agents, and cosmetic agents and include an emulsifier and biodegradable microcapsules. The biodegradable microcapsules may include a core material and a shell where the shell consists of at least one barrier layer and a stability layer. The barrier layer may surround the core material. The stability layer may include at least one biopolymer and be arranged on the outer surface of the barrier layer(s).

This invention discloses a gas separation membrane and its preparation method, belonging to the field of gas separation membrane technology. The gas separation membrane includes a separation layer comprising a network and PTI nanosheets dispersed within the network. The network includes at least one of a biopolymer network and a chemical polymer network. Optionally, it further includes a support layer disposed below and bonded to the separation layer. The preparation method of the gas separation membrane includes either step A or step B: Step A: Forming a membrane on the surface of a polymer hydrogel using PTI nanosheets and the network as raw materials, thereby obtaining the gas separation membrane; Step B: Forming a membrane on the surface of the support layer using PTI nanosheets and the network as raw materials, thereby obtaining the gas separation membrane. The gas separation membrane of this invention is an N2 preferential permeation membrane, possessing both a high N2 permeation rate and a high N2 / CO2 selectivity.

This invention relates to the field of medical biopolymer materials technology, specifically to an injectable hydrogel for kidney stone removal, its preparation method, and its application. The preparation materials include at least a precursor solution 1 and a precursor solution 2. Precursor solution 1 contains at least a polyethylene glycol derivative and a thickener, while precursor solution 2 contains at least a polyamino polymer. By optimizing the formulation ratio of the two-component precursor solutions, a hydrogel with strong conformability, good toughness, and viscosity is formed in situ in the kidney stone area. This encapsulates the kidney stone, facilitating its removal from the body and avoiding the safety hazards associated with small kidney stone fragments or conventional drug treatment.

The present invention relates to an industrially compostable biopolymer for blow film and the process for preparing the same. Moreover, the present invention provides an industrially compostable biopolymer for blow film wherein the biopolymer for blow film comprises of compostable resin, natural fillers, compatibilizer, and lubricant. The present invention is to provide an industrially compostable biopolymer for blow film that easily disintegrates in nature.

A composite material and method can include a bioplastic film, the bioplastic film including a first surface and a second surface, wherein the first surface denotes an inner facing surface and the second surface denotes an exterior facing surface. The bioplastic film can include a polypeptide-based or polysaccharide-based biopolymer, or a mixture of polypeptide-based and polysaccharide based biopolymer, and a bioplasticiser substance. An inner product-facing surface of the bioplastic film can include a coating that includes alpha-eleostearic acid as a major component. Further provided are products containing the material and their uses in the fields of packaging, coatings and ink-printable substrates.

The present invention provides a method for reducing the amount of DNA remaining in a biopolymer so as to increase the purity of the biopolymer when producing the biopolymer by means of a microorganism. This biopolymer production method includes: an endodeoxyribonuclease treatment step for bringing an endodeoxyribonuclease into contact with biopolymer granules obtained by culturing a microorganism capable of producing a biopolymer; and a pH adjustment step for keeping the biopolymer granules under the condition of a pH of 7.0 or higher at least at one time point after the start of said endodeoxyribonuclease treatment.