243 results about "Hydroxy fatty acid" patented technology

The invention discloses a polyhydroxyalkanoate-containing multi-component water-based ink binder system, a water-based ink composition and a preparation method and application thereof, and belongs to the technical field of environment-friendly printing materials and water-based ink. According to the invention, a microscopic two-phase or core-shell structure taking the second film-forming resin as a continuous phase and polyhydroxyalkanoate as a dispersed and enriched phase is constructed. Compared with the prior art, a printing layer can be endowed with excellent anti-blocking property, smooth touch feeling and barrier property under an extremely thin dry film only by using an extremely small amount of bio-based components, and meanwhile, excellent adhesive force and abrasion resistance are ensured. In addition, the water-based ink composition also shows excellent household compost and industrial compost degradation performance. The system not only greatly reduces the cost, but also has excellent paper repulping and deinking characteristics, and provides a high-performance solution for environment-friendly printing.

The invention discloses a bacteriostatic and antiviral bamboo pulp paper-based sanitary isolation bag as well as a preparation method and application thereof, and belongs to the field of functional paper-based packaging materials. The isolation bag takes bamboo pulp fiber paper as a base material, and the surface of the isolation bag is coated with a water-based polyhydroxyalkanoate functional coating. According to the preparation method, a special polyphenol derivative-chitosan quaternary ammonium salt-nano zinc oxide organic-inorganic hybrid factor is introduced, and the problem of agglomeration of nano particles is effectively solved by utilizing the special bridging effect of polyphenol, so that high-density cation capture and oxidation inactivation sites are constructed on the surface of the coating. Compared with the prior art, the method has the advantages that the method does not need to depend on organic fluorine compounds, and the excellent waterproof and oil-proof barrier effect and the efficient inactivation of viruses can be achieved only through the extremely low coating amount. In addition, the isolation bag has unique environmental chemical responsiveness, can be efficiently dissociated under the alkaline condition to facilitate repulping recovery, can be completely biodegraded in the natural environment, and perfectly considers the requirements of biological safety protection and green environmental protection.

The invention discloses a paper base-PHA double-sided composite soil biodegradable agricultural mulching film as well as a preparation method and application thereof, and belongs to the technical field of agricultural mulching materials and green high polymer materials. The mulching film comprises a paper base layer and a homologous polyhydroxyalkanoate covering layer arranged on the surface of the paper base layer. Through double-sided synergy of the water-based PHA coating on the soil sticking surface and the thermoplastic PHA extrusion film layer on the windward and rainy surface, and in combination with a'wet-to-heat 'integrated composite process and trace anhydride grafting, super-strong combination of a paper-plastic interface fiber tearing level is realized, and the problem that traditional paper-plastic is easy to layer is solved. Compared with a traditional fluorine-containing product, on the premise that total organic fluorine is not detected, the excellent barrier and moisture conservation performance is achieved with the thinner coating thickness by means of double barriers. The product has excellent mechanical laying adaptability and long-season weather resistance, is fully biodegradable, thoroughly solves the hidden dangers of micro-plastic residues and persistent organic pollutants, and is an ideal green agricultural covering material.

According to the freeze-drying process of the dendrobium officinale solid beverage, psyllium seed husk powder and a trihydroxy fatty acid derivative are compounded to form a synergistic protection system, annealing and segmented freeze-drying processes are combined, ice crystal growth is inhibited on the molecular level, active ingredients are protected, a stable porous structure is constructed on the macroscopic level, and the dendrobium officinale solid beverage is prepared. Finally, the dendrobium officinale solid beverage which is high in active ingredient retention rate and good in color, luster and flavor is efficiently prepared, meanwhile, the freeze-drying period is remarkably shortened, and the production efficiency is improved.

The invention discloses a paper-based molded coffee capsule capable of being naturally composted, a PHA aqueous dispersion in-situ film forming barrier heat-sealing composite layer, a preparation method and application thereof, and belongs to the field of degradable packaging and single-cup extraction capsules. The capsule body is formed by molding paper pulp and is provided with a side wall, a bottom wall and a mouth flange; the biodegradable polyester-based film sealing component is connected to the flange in a sealing manner; and the polyhydroxyalkanoate barrier heat-sealing composite layer covers the inner surface of the body and the sealing surface of the flange. The composite layer is obtained by in-situ film forming of a particle size gradient double-layer aqueous dispersion and comprises a permeation anchoring layer located in paper pulp pores and a continuous compact layer located on the outer side in the thickness direction. The flange is a hot-pressing densified area, and a local thickening heat sealing ring is formed on the sealing face of the flange. Through physical anchoring of the small-particle-size components and surface film forming of the large-particle-size components, the moisture and oxygen blocking and interface bonding performance is achieved, and the brewing sealing performance is guaranteed.

The application discloses a paper-based moulded coffee capsule capable of natural composting, a PHA aqueous dispersion in-situ film-forming barrier heat-sealing composite layer and a preparation method and application thereof, and belongs to the field of degradable packaging and single-cup extraction capsules. The capsule comprises a capsule body formed by moulded paper pulp, a side wall, a bottom wall and a mouth flange, a biodegradable polyester-based film sealing member sealed to the flange, and a polyhydroxyalkanoate barrier heat-sealing composite layer coated on the inner surface of the body and the sealing surface of the flange. The composite layer is obtained by in-situ film-forming of a particle size gradient double-layer aqueous dispersion, and comprises an infiltration anchoring layer located in the pores of the paper pulp and a continuous dense layer on the outside along the thickness direction. The flange is a heat-pressed densification area, and a locally thickened heat-sealing ring is formed on the sealing surface of the flange. The application realizes the moisture and oxygen barrier and interface bonding performance through physical anchoring of small particle size components and surface film-forming of large particle size components, and guarantees the brewing sealing performance.

The present invention relates to a novel strain having an excellent polyhydroxyalkanoate-producing ability and a use thereof. A species of Halomonas ixanhensis, which previously has not been reported to have polyhydroxyalkanoate biosynthesis characteristics, was found to produce polyhydroxyalkanoate. A novel HN-1-3-2 strain that produces polyhydroxyalkanoate in a significantly higher content and concentration than existing polyhydroxyalkanoate-producing strains has been selected, and thus can be used for the purpose of producing polyhydroxyalkanoate.

This invention discloses an aqueous dispersion of a polyhydroxyalkanoate-grafted ethylene-acrylic acid copolymer with a self-emulsifying core-shell structure, its preparation method, and its recyclable paper packaging, belonging to the field of reactive modification of polymer materials and green packaging technology. This invention employs in-situ reactive extrusion technology to construct stable microparticles with a hydrophobic polyhydroxyalkanoate core and a hydrophilic ethylene-acrylic acid copolymer salt as the shell, overcoming the industry challenge of poor compatibility of bio-based materials. The aqueous dispersion requires no external emulsifier, achieving the same excellent barrier and heat-sealing effects with a lower coating weight, significantly reducing usage costs. Its unique alkali-induced swelling mechanism endows the coating with intelligent peeling properties, achieving efficient separation of the coating and fiber during resizing, greatly improving the purity of recycled fibers.

The present application relates to the field of beta-hydroxy fatty acid ester polymer preparation, further to a kind of beta-hydroxy fatty acid ester polymer and the method for preparing the polymer.The structural formula of the polymer is as shown in formula 1:Wherein, R1 is H or C1-C12 alkyl, R2 is C1-C6 alkyl;The weight average molecular weight of the polymer is 8000-200000;The number average molecular weight of the polymer is 5000-180000;Polydispersity index is 1-2.5.The beta-hydroxy fatty acid ester polymer of the present application has higher molecular weight, narrower molecular weight distribution, has the performance of corresponding biofermentation synthesis beta-hydroxy fatty acid ester polymer, and does not contain the impurity that bio-synthesis beta-hydroxy fatty acid ester polymer is difficult to remove, has higher application value.The preparation method of the present application, reaction condition is relatively mild, process is simple, and has higher process safety.

The present invention provides a method for producing melanin and / or polyhydroxyalkanoate (PHA) materials and / or proteins from microorganisms by means of C1-C1 and / or C2-C2 resources and uses thereof. The Halomonas is modified, so that the Halomonas can be used for producing melanin, and the co-production of extracellular melanin and intracellular PHA (Polyhydroxyalkanoate) and / or protein is realized. According to the method, a platform for sustainable and high-benefit production of melanin, PHA and / or protein by using carbon dioxide is established, and the method plays an important role in further reduction of production cost and improvement of sustainable development.

The application discloses a kind of landscape flowerpot production polyester degradable plastics and preparation method thereof, belong to degradable plastics production technical field, first, landscape flowerpot production polyester degradable plastics includes following mass parts raw materials: polylactic acid 50~70 parts, polybutylene succinate 20~35 parts, modified polyhydroxy fatty acid ester 10~15 parts, rare earth strontium aluminate coated cerium oxide core-shell powder 0.8~1.2 parts, antioxidant 0.3~0.8 parts, lubricant 0.5~1.0 parts.The application is improved by modification PHA (promote interface compatibilization and low temperature toughness) and core-shell powder (enhance anti-ultraviolet and degradation control), combined with PLA / PBS basic system, comprehensively solve the core defects of landscape flowerpot material. Example data confirms that its low-temperature impact strength is increased by more than 50%, yellowing rate is reduced by more than 80%, rigidity remains stable, degradation rate is controllable, has outstanding environmental protection and market value.

The invention discloses a repulping water-based bio-based high-barrier coating composition, a coating product as well as a preparation method and application of the coating product, and belongs to the technical field of green packaging materials. The composition is composed of a functional core-shell structure acrylic polymer, polyhydroxyalkanoate particles, an in-situ modified mineral and an intelligent cross-linking system. According to the invention, an organic and inorganic dual interpenetrating network sensitive to pH is innovatively constructed, so that the coating has excellent water resistance, oil resistance and gas barrier property in a use environment, and network swelling and dissociation can be rapidly generated under an alkaline recovery condition. Compared with a traditional technology depending on high mineral filling, according to the scheme, a better barrier effect can be achieved under the low filling amount by utilizing the synergistic enhancement effect of the trace intelligent cross-linking agent and the bio-based particles, meanwhile, the paper is endowed with high fiber recovery yield and excellent industrial and household compost degradation performance, and fluoride addition is completely avoided; the problem that the barrier property, the repulping property and the full biodegradability of paper-based packaging cannot be considered at the same time is effectively solved.

This invention provides a method for preparing chiral epoxy compounds, chiral β-lactones, and polyhydroxyalkanoates. The method involves three steps: chiral resolution of the epoxy compound, carbonylation of the chiral epoxy compound to prepare a chiral β-lactone, and ring-opening polymerization of the β-lactone. Using this method, polyhydroxyalkanoates with good tensile strength and toughness, as well as a wide processing window, can be prepared. This invention has advantages such as simple steps, low raw material costs, and no need to introduce a second monomer, making it easy to scale up production.

This invention relates to a recombinant Halomonas strain that produces polyhydroxyalkanoates (PHA) by overexpressing endogenous enzymes encoding ADP-dependent acetyl-CoA synthase (ADP-ACS). acd This gene not only enhances the recombinant bacterium's tolerance to acetic acid but also enables it to efficiently convert acetic acid or acetate substrates into acetyl-CoA, thereby participating in the tricarboxylic acid cycle (TCA cycle) and the synthesis of PHA. The present invention also relates to a method for producing PHA using the aforementioned recombinant Halomonas bacterium employing a pH-stat strategy.

This invention relates to single-use products made from composite materials, processes for making single-use products, and premixes that can be used in such processes. The inventors have developed composite materials comprising a combination of a non-wood lignocellulosic material and a biodegradable and / or compostable polyester, preferably a polyhydroxyalkanoate. Such composites can be processed into molded articles such as cups, plates, straws, and cutlery, possessing functionality suitable for replacing conventional SUPs produced from petrochemical-based plastics. The lignocellulosic material can originate from by-products of agro-food production. The production of these composite materials and their processing into molded (single-use) articles is straightforward, can be carried out using conventional machinery, and consumes relatively small amounts of energy, chemicals, and / or water.

A synthetic fiber is disclosed, formed from a composition which is made of from about 1 to about 98 weight percent of at least one polyhydroxyalkanoate; from about 1 to about 10 weight percent of at least one nucleating agent selected from the group consisting of polyester waxes, behenamide, crodamide, stearamide, erucamide, pentaerythritol, dipentaerythritol, boron nitride, and mixtures thereof; and from about 0.1 to about 5 weight percent of at least one melt flow modifier selected from the group consisting of calcium stearate, zinc stearate, starch, diamide oligomers, organic peroxides, and mixtures thereof.

The invention discloses a difunctional alcohol dehydrogenase derived from Geobacillus thermodenitrifis, the difunctional alcohol dehydrogenase takes NAD < + > as a cofactor, can specifically catalyze a continuous oxidation reaction of omega-hydroxy fatty acid, and catalyzes the omega-hydroxy fatty acid to synthesize alpha, omega-binary fatty acid through single enzyme catalysis without an aldehyde intermediate. The alcohol dehydrogenase has dual catalytic functions of alcohol oxidation and aldehyde oxidation, the oxidation process from hydroxymethylene to carboxyl can be completed in one step, the reaction steps are simplified, accumulation and separation of intermediate aldehyde are avoided, the conversion efficiency is improved, and the alcohol dehydrogenase is alpha, omega-dibasic fatty acid and is a novel alcohol dehydrogenase. The invention provides a simple and efficient biocatalysis way for biosynthesis of dodecanedioic acid, especially dodecanedioic acid, and has important industrial application value.

This invention discloses an extremely salt-tolerant halophilic bacterium, HD16, which can grow under extreme salinity conditions up to 4.0 M sodium chloride (approximately 230 g / L sodium chloride) and also exhibits high alkalinity tolerance, surviving at pH 7–11. Therefore, it is predicted to have broad application prospects in wastewater treatment and other fields. Furthermore, it can be used to produce polyhydroxyalkali (PHA). When cultured in a 500 ml Erlenmeyer flask, the cell dry weight yield reaches 9.45 g / L, with PHA accounting for 72.97% of the bacterial dry weight. The extreme salt tolerance and high alkalinity tolerance of this strain enable it to efficiently accumulate polyhydroxyalkali esters under open, non-sterile conditions.

The present disclosure relates to: a biodegradable resin composition; and a biodegradable article manufactured using same. The biodegradable resin composition comprises a polyhydroxyalkanoate (PHA) resin and a plasticizer, and exhibits a plasticizer absorption rate controlled to a specific range.

The invention provides a special material for a polyhydroxyalkanoate straw, the straw and a preparation method of the straw. The special material for the polyhydroxyalkanoate straw comprises a polyhydroxyalkanoate base material, a nucleating agent and a chain extender, wherein the polyhydroxyalkanoate base material is prepared from 60 to 95 weight percent of crystalline polyhydroxyalkanoate and 5 to 40 weight percent of amorphous polyhydroxyalkanoate. According to the invention, the polyhydroxyalkanoate base material consisting of the crystalline polyhydroxyalkanoate and the amorphous polyhydroxyalkanoate in a specific proportion is compatible with the auxiliary materials such as the nucleating agent and the chain extender, so that the performance of the PHA is improved, and the PHA straw can be used for preparing the PHA straw with excellent quality.

This application relates to a paint protection film for metallic paint surfaces, which is made by laminating a high-molecular polymer onto a TPU base film using a coating technology. The high-molecular polymer contains bio-cellulose and polyhydroxyalkanoates. The paint protection film of this invention provides excellent protection for vehicle paint and has self-healing properties, preventing scratches and significantly reducing the overall impact of scratches on the vehicle's appearance. Furthermore, the paint protection film exhibits excellent aging resistance and can be customized through color changes, matte finishes, and other treatments.

The invention belongs to the technical field of polyester polyol, and relates to bio-based polyester polyol based on hydroxy fatty acid / acid ester as well as a preparation method and application of the bio-based polyester polyol. The invention discloses a preparation method of bio-based polyester polyol based on hydroxy fatty acid / acid ester, which comprises the following steps: mixing hydroxy fatty acid / acid ester, polyol and a catalyst in inert gas, heating to a first reaction temperature of 90-120 DEG C, reacting for 0.1-3 hours, heating to a second reaction temperature of 110-180 DEG C, continuously reacting for 6-24 hours, vacuumizing to a vacuum degree of 0-400 Pa, reacting for 1-5 hours, cooling to room temperature, and filtering to obtain the bio-based polyester polyol based on hydroxy fatty acid / acid ester. The bio-based polyester polyol based on the hydroxy fatty acid ester is obtained. The invention also discloses a bio-based polyester material and a bio-based polyurethane material which take the bio-based polyester polyol based on the hydroxy fatty acid ester as a raw material. The bio-based polyester polyol based on hydroxy fatty acid / acid ester can be compounded with other polyols for use, is used for regulating and controlling the performance of high polymer materials, and effectively improves the mechanical properties of the materials.

The invention relates to the technical field of biology, in particular to pseudomonas fluorescens GS-1 for synthesizing polyhydroxyalkanoate and application of the pseudomonas fluorescens GS-1, the pseudomonas fluorescens GS-1 is preserved in China General Microbiological Culture Collection Center on February 6, 2026, and the preservation number is CGMCC No.37739; the strain carries a phaC gene and can synthesize PHA, and the straw sugar PHA conversion efficiency reaches 87.7% of that of a glucose system; the method has inherent lignocellulose hydrolysate inhibitor tolerance, and the PHA synthesis capability retention rate in the complex self-made corn straw saccharification liquid reaches 91.4%. A high-quality strain resource with direct application potential is provided for producing the PHA based on cheap straw saccharification liquid.

This disclosure provides a method for extruding high-moisture polyhydroxyalkanoate. The method includes the following steps: mixing at least one polyhydroxyalkanoate in powder form with an initial moisture content of at least 0.10% by weight with at least one resin additive at a temperature of about 120°C to about 190°C to form an extrusion mixture. The mixture is then extruded through an extrusion die to form a resin extrudate comprising at least one polyhydroxyalkanoate and at least one resin additive.

This invention relates to the field of environmentally friendly polymer materials technology, specifically to an environmentally friendly furniture protective film and its preparation method. It aims to solve the technical problems of insufficient toughness and short service life of traditional furniture protective films. The protective film of this invention uses a blend of polylactic acid, polyhydroxyalkanoates, and dimer fatty acid esters as a matrix, adds cyanoethylated lignin-cellulose nanocrystal composite reinforcing agents to form a dense nano-network, and introduces dynamic crosslinking agents and functional additives containing disulfide bonds. This invention employs a solvent-free ultraviolet light / humid heat dual curing system for coating and curing. The furniture protective film of this invention exhibits excellent mechanical properties, significantly improved toughness, high barrier properties, and multiple functions, as well as self-healing capabilities and environmentally friendly characteristics throughout its entire life cycle.

A genetically engineered strain of Pseudomonas is provided, which is capable of metabolizing lactose as a sole carbon source in the production of polyhydroxyalkanoates (PHAs). A method of engineering microorganisms and a method of PHA production are also provided, wherein lactose is used as a sole carbon source.

The present application relates to the technical field of hydrolysis of hydroxy fatty acid ester, and discloses a hydrolysis filler, a preparation method and application thereof. The hydrolysis filler comprises a silane layer and an active layer which are successively coated on the outer surface of the filler; the active layer comprises amido, pyrrolyl, and sulfhydryl and / or thioether, phosphoric acid group and sulfonic acid group. When the hydrolysis filler is used for hydrolysis of hydroxy fatty acid ester to prepare hydroxy glycolate aqueous solution, the water-ester ratio in the hydrolysis process and the oligomer content in the target product can be effectively reduced.

The present application relates to the technical field of agricultural product processing, and particularly relates to an agricultural product coating material, a coated agricultural product and a preparation method. The present application uses polyhydroxyalkanoate with specific performance as the main coating material for coating agricultural products. In the coating process, the traditional high-temperature film forming process is not used, but only needs to be formed at a temperature of 40-70 DEG C, thereby helping to reduce or avoid the adverse effects of high temperature on the contents (such as seeds, organic fertilizers, agricultural drugs, etc.) of the coated agricultural products. The agricultural product coating material provided by the present application is suitable for coating various agricultural products (such as seeds, fertilizers, drugs, etc.), and can achieve the purposes of protection and slow release. The coating material provided by the present application is used for agricultural product coating, and the obtained coated agricultural product has high heat resistance after coating. In addition, the agricultural product coating material provided by the present application is environmentally friendly and can be degraded in the soil environment, without causing environmental pollution.

The objective of the invention is to provide a plant activator having a resistance to the wash-off and a superior handleability, transportability and storage stability. A powdery plant activator comprising, at least one compound selected from an oxo fatty acid or a derivative or a salt thereof and a hydroxy fatty acid or a derivative or a salt thereof, and an unsaturated fatty acid (excluding an oxo fatty acid and a hydroxy fatty acid).

The invention discloses an in-situ water treatment and micronutrient slow release device for a seawater aquarium, and relates to the technical field of aquarium maintenance equipment. The device comprises a probiotic microorganism attachment framework and a plurality of layers of slow-release nutrition balls. The framework is composed of an upper biochemical filter bin and a lower slow release bin, and the upper filter bin is of a dense honeycomb structure so as to provide a huge microorganism attachment surface area; the lower slow-release bin is a drawable drawer with micropores, and the top surface of the lower slow-release bin is closed to protect the upper flora. The slow-release ball adopts a three-layer layered design, wherein the outer layer is a quick start and flora colonization layer; the middle layer contains polyhydroxyalkanoate PHA or PHBV and a microelement chelate, and is used as an algae phase competition and microelement supplement layer; and the inner layer contains a plurality of amino acids and astaxanthin and is used as a coral nutrition and homeostasis maintaining layer. The device is specially designed for the seawater coral jar, nutrient substances are released in a time sequence, the problems of element fluctuation and coral maintenance are solved, and efficient and stable maintenance of water quality is achieved.