22 results about "Phytenic acid" patented technology

The invention discloses a neutral phytase mutant as well as a gene and application thereof, and belongs to the technical field of enzyme engineering. The invention aims to solve the technical problems that the existing neutral phytase is poor in thermal stability, poor in acidic environment stability, narrow in pH application range, low in low-temperature catalytic efficiency and the like. According to the technical scheme, the phytase preparation PHY06 with high stability and the gene and application of the phytase preparation PHY06 are provided. The method comprises the following steps: carrying out T329G, D333V, T353F and A364F mutation on a PHY03 sequence of which the amino acid sequence is shown as SEQ ID NO.1, so as to obtain a mutant PHY06;

The invention provides an efficient fireproof aerogel steel structure coating and a preparation method thereof, and belongs to the technical field of fireproof coatings. The silicified polyacrylonitrile fiber three-dimensional network is constructed by combining pre-oxidation of the polyacrylonitrile fiber with vapor deposition and carbonization treatment, and excellent mechanical properties and heat-resistant stability are achieved; the light, high-strength, heat-resistant and flame-retardant composite hybrid aerogel is formed through the synergistic reaction of polyacrylonitrile fibers and tetraethoxysilane and the complexing action of boric acid, and the flame retardance and the structural stability are further enhanced through boric acid derivatives and two-step carbonization treatment; sodium lignin sulfonate and a melamine-phytic acid system are self-assembled, pores are filled, the free radical quenching efficiency is improved, and meanwhile, the toughness and impact resistance of the coating are enhanced through a supramolecular structure; the outer layer carbon-silicon aerogel and the inner layer expansion coating form double barrier, and the fire resistance and flame retardance of the coating are remarkably improved.

The invention relates to the technical field of cable materials, and provides an ultraviolet curing polyethylene cable material with high insulating property and a preparation process thereof. The polyethylene cable material is prepared from the following raw materials in parts by weight: 50 to 80 parts of first low-density polyethylene, 2 to 10 parts of second low-density polyethylene, 10 to 20 parts of high-density polyethylene, 5 to 15 parts of phytic acid-nano-TiO2 modified lignin, 1 to 4 parts of modified inorganic particle composite material, 1 to 4 parts of polyolefin elastomer, 0.5 to 1.5 parts of cross-linking agent, 0.5 to 1.5 parts of initiator and 0.2 to 0.8 part of antioxidant. The polyethylene cable material disclosed by the invention has the advantages of excellent mechanical property, aging resistance, insulating property and flame retardant property, high safety and long service life.

The invention discloses a phytase mutant AppA as well as a coding gene, a preparation method and application thereof. The phytase mutant AppA is obtained by mutating amino acids at the 137th site, the 185th site and the 255th site of wild type phytase AppA from asparagine, aspartic acid and tyrosine into valine, asparagine and aspartic acid respectively; the amino acid sequence and the nucleotide sequence of the gene are SEQ ID NO.1 and SEQ ID NO.2 respectively. The catalytic efficiency of the mutant enzyme AppA provided by the invention on sodium phytate is improved by 2.5 times compared with that of a wild enzyme AppA; under the condition of 70 DEG C, the half-life period of the mutant enzyme AppA is 3.4 times that of the wild enzyme AppA. The mutant enzyme AppA has the characteristic of high enzyme activity under a high-temperature condition, which indicates that the mutant enzyme AppA has an important application prospect in industrial production of a feed in which phytic acid needs to be degraded under the high-temperature condition.

The invention relates to the technical field of polymer coatings, in particular to a solvent-free permeation-resistant anti-corrosion polymer coating and a preparation method thereof. The invention relates to a preparation method of a solvent-free permeation-resistant anti-corrosion polymer coating. The preparation method comprises the following steps: preparation of an MXene nanosheet, preparation of a modified MXene filler, preparation of a slow-release corrosion inhibitor and preparation of a polymer coating. The double modified MXene and the slow-release corrosion inhibitor are adopted to synergistically improve the corrosion resistance of the coating. Modified MXene is subjected to intercalation modification by tannic acid and phytic acid, so that the modified MXene has physical barrier and chemical corrosion inhibition characteristics, the compatibility with a resin interface is enhanced, and the permeation resistance of a solvent-free coating is improved; according to the slow-release corrosion inhibitor, porous titanium-based oxide is used for loading MBT, slow release is triggered when the coating is damaged, active repairing is achieved, the pain point that a traditional coating is damaged and fails is solved, and the corrosion resistance in the severe environment is greatly improved.

This invention relates to the field of porous thermal insulation materials, and discloses a fireproof and heat-insulating material and its preparation method. The material is an aerogel comprising a polyimide framework, two-dimensional transition metal carbonitride nanosheets, and phytic acid. The aerogel contains multiple unidirectional, parallel tubular or layered channels, each surrounded by a pore wall. The pore wall is composed of a cross-linked network formed by chemical bonds connecting phytic acid, two-dimensional transition metal carbonitride nanosheets, and the polyimide framework. This invention uses phytic acid as a cross-linking agent and an in-situ catalytic charring agent, overcoming the defect of easy agglomeration of nanosheets and generating a dense carbonized layer upon heating, effectively supporting the pore walls and preventing the porous framework from collapsing. Combined with the heat conduction blocking effect of the unidirectional channels, the material exhibits excellent low thermal conductivity, high mechanical strength, and extremely stable high-temperature shrinkage insulation properties, making it suitable for fireproof and heat-insulating protection in extreme environments.

The present invention relates to a polyelectrolyte complex consisting of chitosan and phytic acid, the method for producing said polyelectrolyte complex using mechanochemical synthesis and its use as an antimicrobial and antioxidant bio-fire-retardant additive for epoxy resins. Furthermore, the present invention relates to a material comprising said polyelectrolyte complex and a polymer, preferably an epoxy resin, an article coated with said flame retardant and an article having said flame retardant embedded therein. Therefore, the present invention is framed within the fireproof plastics industry with high anti-fire demands such as the automotive industry, aeronautics, construction or the electrical-electronic sector.

The application provides a composite microbial agent for decomposing soil insoluble phosphorus and an application thereof, and relates to the technical field of microorganisms. Active ingredients of the composite microbial agent include Xanthomonas campestris, Burkholderia cenocepacia and Burkholderia parafungorum. The three strains have the ability to dissolve Ca3(PO4)2, FePO4, AlPO4, lecithin and calcium phytate, and can synergistically dissolve the above-mentioned five kinds of insoluble phosphorus sources. The phosphorus solubilizing activity of the composite microbial agent after oscillation culture can reach 53.32 mg·L ‑1 , and the phosphorus solubilizing function is stable. Meanwhile, the composite microbial agent has the characteristics of degrading lignin, producing siderophores and indole acetic acid. When applied to the rhizosphere soil of plants, the composite microbial agent has a significant phosphorus solubilizing and growth promoting effect, and solves the technical problems of single type of phosphorus source dissolved by the phosphorus solubilizing bacteria in the prior art or poor stability of the phosphorus solubilizing function.

This invention relates to the fields of modified graphene technology and anti-corrosion materials technology, specifically to a modified graphene material and its preparation method, an anti-corrosion coating and its preparation method and application, and an anti-corrosion coating and its application. The modified graphene material includes graphene oxide and ammonium phytate grafted onto the surface of graphene oxide via amide bonds. The structural formula of the ammonium phytate is shown in formula (I). In formula (I), * represents the N-linked site in the amide bond; R1 is selected from one of the groups formed by removing two terminal amine groups from a C2-C10 alkylene group or an n-ethylene(n+1)amine, where n is an integer and 2≤n≤6. The modified graphene of this invention has the advantages of strong dispersibility in water-based coatings and strong adhesion to metal substrates. When applied to water-based anti-corrosion coating resins, it improves the adhesion, high barrier properties, and corrosion resistance of the coating.

The invention discloses a functionalized polythiophene composite electrode material and preparation and application thereof in uranium-containing wastewater treatment, and a preparation method comprises the following steps: mixing a phytic acid solution with a 3-acetic acid-thiophene solution to obtain a mixed solution; and carrying out electro-deposition, washing and drying by taking carbon paper as a working electrode, a platinum sheet as a counter electrode, a calomel electrode as a reference electrode and the mixed solution as an electrolyte to obtain an electrode coated with polyphytic acid-3-acetic acid-thiophene, namely the functionalized polythiophene composite electrode material. The invention solves the problems of low uranium reduction selectivity, low adsorption capacity, insufficient active sites and high material preparation cost of the existing adsorption material. The prepared electrode material structure has high selectivity and high adsorption capacity (greater than or equal to 1484 mg / g) on U (VI) in wastewater by virtue of excellent conductivity of polythiophene and the characteristic that P = O active sites can be regenerated in situ in an electric field, the adsorption rate is remarkably increased, and excellent electrochemical uranium extraction performance is shown.

The invention discloses a preparation method of phytic acid copper co-pyrolysis lignin graded porous carbon. The preparation method comprises the following steps: preparing a copper-phytic acid amorphous coordination polymer Cu-PA aCP template; preparing a composite precursor; performing pyrolysis carbonization and graded pore forming; and post-processing the product. According to the preparation method, Cu-PA aCP is originally used as a template, and the unique decomposition behavior of Cu-PA aCP in the pyrolysis process can be accurately induced to form a through macropore, mesopore and micropore hierarchical pore network, so that the problem that the pore structure cannot be controlled by a traditional method is effectively solved; according to the prepared hierarchical porous structure, the transmission path of electrolyte ions is greatly optimized, the diffusion resistance is remarkably reduced, and the specific capacitance, the rate capability and the cycling stability of the carbon electrode are greatly improved; when the lignin carbon is used as a zinc ion capacitor electrode, the energy density and the power density of the lignin carbon are superior to those of traditional lignin carbon.

The invention provides a nitrogen-phosphorus co-doped carbon catalyst and a preparation method and application thereof, and belongs to the technical field of electric energy catalytic conversion. The method comprises the following steps: adding polyether F127, hexamethylenetetramine, phytic acid and 1, 3, 5-trimethylbenzene into a solution containing 3-aminophenol, and uniformly stirring to obtain a mixed solution; performing hydrothermal reaction on the mixed solution to obtain a reaction product; and calcining the reaction product to obtain the nitrogen and phosphorus co-doped carbon catalyst. The nitrogen-phosphorus co-doped carbon catalyst with mesoporous structures uniformly and orderly distributed on a solid sphere is prepared, the doping level of pyridine N is regulated and controlled through P doping, the content of pyridine nitrogen is increased, meanwhile, uniform and ordered mesopores are formed in the whole sphere, a developed pore structure is formed, exposed catalytic active sites are increased, and the catalytic activity of the catalyst is improved. And the directional adsorption of carbon dioxide is facilitated, so that the catalytic activity of the material is greatly improved, and the high-selectivity production of CO can be realized at lower overpotential.

The application discloses an antibacterial and breathable elastic fiber fabric and a preparation method and application thereof, and belongs to the field of high polymer fiber fabric preparation. The antibacterial and breathable performance and elasticity of the fiber fabric need to be further improved. The application is to prepare a fiber-forming elastomer containing a siloxane flexible chain segment, a disulfide bond unit and an unsaturated side group, to further prepare a bridged wetting functional body with a catechol group, a sulfur-containing group and a zwitterionic structure, and to construct an antibacterial and breathable finishing agent containing a silicon oxide network, a phytic acid-zinc coordination structure and a tannic acid multi-point binding action. The antibacterial and breathable elastic fabric is prepared through the synergistic action of the three. The antibacterial and breathable elastic fabric can consider the antibacterial property, the wetting property, the breathability and the elastic recovery performance of the fabric, and can improve the structural stability and the wearing comfort.

The application discloses a neutral phytase mutant, a gene thereof and application, and belongs to the technical field of enzyme engineering. The technical problem to be solved is that the existing neutral phytase has the problems of poor thermal stability, poor acid environment stability, narrow pH application range and low low-temperature catalytic efficiency. The technical solution is to provide a phytase preparation PHY06 with high stability, a gene thereof and application. The PHY03 sequence shown in the amino acid sequence of SEQ ID NO. 1 is subjected to T329G, D333V, T353F and A364F mutations to obtain the mutant PHY06.

The invention belongs to the field of nutriology, and particularly relates to a plant lactobacillus NuPlus-8 capable of synergistically promoting absorption of multiple mineral substances, a product and application. The plant lactobacillus NuPlus-8 disclosed by the invention is derived from healthy breast milk, has good acid-resistant and cholate-resistant characteristics, and can survive and keep activity in related environments of intestinal tracts. The strain has the effect of synergistically promoting absorption of eight nutrient substances including calcium, magnesium, zinc, selenium, iron, phosphorus, vitamin D and protein, and meanwhile promotes skeletal development; phytase can be secreted, phytic acid-mineral compounds can be degraded, combined calcium, magnesium, zinc, selenium, iron and phosphorus can be released, and the solubility and the availability of mineral substances can be improved; and transmembrane transport and absorption of intestinal epithelial cells to various minerals, VD and amino acids are significantly improved. The strain has a unique physiological function of synergistically promoting multi-nutrient absorption, can be used in products for improving nutrient absorption and utilization efficiency, and has remarkable application value and industrial prospect.

The application discloses a modified cellulose slurry, a preparation method thereof and application of the slurry in the field of diaphragms, and relates to the technical field of diaphragm materials. The slurry comprises 18-28 parts of calcium phytate polyphenol interface fiber, 28-40 parts of cellulose nanofiber, 8-15 parts of bleached wood pulp fiber, 10-18 parts of inorganic heat-resistant filler, 2-5 parts of polyvinyl alcohol, 0.4-1.2 parts of sodium carboxymethyl cellulose, 0.2-0.8 parts of polyvinylpyrrolidone, a wetting agent, a defoaming agent and deionized water. The interface fiber has a cellulose nanofiber core layer, a chitosan-tannic acid oxidation coupling interface layer and a calcium phytate anchoring phase. The slurry is step-by-step pulped and wet-film-formed to obtain a diaphragm, and the slurry can improve filler agglomeration and insufficient interface combination, and improve the thermal dimensional stability, mechanical properties, electrolyte wettability and ion transmission performance of the diaphragm.

This invention relates to the fields of polymer materials and textile engineering, and discloses a high-toughness polyester fabric and its preparation method. The fabric is composed of polyester fibers, a borate-aluminum phytate-silica doped modifier, hydroquinone, and various auxiliaries. The borate-aluminum phytate-silica doped modifier is composed of a dynamic network of borate esters formed by boric acid and polyvinyl alcohol, a coordination structure formed by phytic acid and aluminum ions, and silica doping. By constructing a synergistic reinforcement system with dynamic reconstruction capabilities and multi-point interfacial interactions, and combining this with the regulation of intermolecular forces by hydroquinone, the modified structure is uniformly distributed at the interface and within the polyester fibers, thereby significantly improving the fabric's elongation at break, impact resistance, fatigue resistance, and abrasion resistance. The method of this invention is simple, highly applicable, and yields a polyester fabric with excellent comprehensive performance and promising application prospects.

The application discloses a composite copper foil and a preparation method and application thereof, and relates to the technical field of copper foil, and discloses a composite copper foil which comprises a copper foil and a molecular-level dense protective film coated on the surface of the copper foil, wherein the copper foil has a nano-twin crystal structure, and the molecular-level dense protective film is formed by using a composite passivation solution containing phytic acid and tannic acid for treatment. The pulse electroplating and the immersion coating passivation process are highly compatible with the existing industrial production line, and thus, large-scale production can be realized without major equipment modification. More importantly, a significant synergistic enhancement effect is generated between the nano-twin crystal substrate and the bio-based passivation layer, so that the final product reaches an optimal balance in terms of multiple key performance indicators such as electrical conductivity, thermal stability, and bonding force with the base material, and a solution with leading comprehensive performance is provided.

The application belongs to the technical field of nanomaterials, and provides a CaPhy-NAD nanoenzyme, a preparation method, application and an alcoholism treatment preparation thereof. The CaPhy-NAD nanoenzyme is prepared by using calcium phytate nanoparticles as a carrier and in-situ loading of ethanol oxidase, acetaldehyde dehydrogenase, horseradish peroxidase and coenzyme NAD. 2+ The CaPhy-NAD nanoenzyme can effectively activate the catalytic activity of acetaldehyde dehydrogenase, and the three enzymes can have a high-efficiency confined cascade reaction in the pore channel of the calcium phytate nanoparticles, so that the recycling of the coenzyme NAD is realized, and the three types of alcohol metabolism-related toxic substances, i.e., ethanol, acetaldehyde and hydrogen peroxide, can be simultaneously removed. The CaPhy-NAD nanoenzyme prepared by the application has excellent catalytic activity and good biological safety, and can be orally administered, thereby providing a new technical idea and solution for the prevention and treatment of alcoholism.

The present application relates to a phytase variant and uses thereof.

The application discloses a reinforcing layer for a wide-temperature-range proton exchange membrane and a manufacturing method thereof, which comprises an ePTFE layer, nanofiber layers respectively formed on two sides of the ePTFE layer, and phytic acid adsorbed in the nanofiber layers; the phytic acid modified polymer nanofiber layer and the ePTFE layer are combined to form the reinforcing layer for the wide-temperature-range proton exchange membrane. The ePTFE layer has strong strength and stability, and can enhance the strength of the proton exchange membrane; the polymer layer which can be spun and has proton conduction capacity or has proton conduction capacity after post-modification is deposited on the ePTFE layer through the electrospinning technology, so that the proton conduction rate of the proton exchange membrane can be effectively improved; the reinforcing layer formed has high strength and high proton conduction capacity; and the proton exchange membrane prepared from the reinforcing layer can meet the use requirements in a high-temperature and low-humidity environment.

The application discloses a phytase-pullulanase fusion protein Y-L4-T and application thereof, and belongs to the technical field of enzyme engineering. The amino acid sequence of the phytase-pullulanase fusion protein Y-L4-T is shown as SEQ ID NO. 46. The application constructs a phytase-pullulanase fusion protein Y-L4-T, the phytase activity of the fusion protein is basically consistent with that of phytase YiAPPA, and the amylase activity is significantly higher than that of pullulanase TK-PUL. After the wheat bread is treated by the fusion protein, the specific volume of the wheat bread is obviously increased, the hardness is obviously reduced, and the elasticity is obviously improved; and the increase of the hardness and the reduction of the elasticity of the wheat bread during storage can be effectively alleviated. The fusion protein Y-L4-T can effectively improve the bread quality and prolong the shelf life of the bread, and has a good application prospect in the baking field.