2140 results about "Hydroxymethyl" patented technology

Disclosed herein are “ketone body-HMB” or “KB-HMB” compositions including a combination of: (1) hydroxymethyl butyrate; (2) a ketone body component such as beta-hydroxybutyrate (BHB) and / or acetoacetate; and (3) optionally a dietetically or pharmaceutically acceptable carrier. Also disclosed herein are methods of using such compositions for producing desired physiological effects, such as fat loss, in a mammal. The compositions beneficially enhance fat loss through ketosis while also reducing or eliminating muscle wasting and / or promoting muscle formation.

The invention discloses flaky silver-coated aluminum powder of a core-shell structure and a preparation method and application of the flaky silver-coated aluminum powder, and particularly relates to the field of electromagnetic shielding materials. Comprising the following steps: carrying out pretreatment of removing an oxidation film on flaky aluminum powder; dispersing the pretreated flaky aluminum powder in a tris (hydroxymethyl) aminomethane hydrochloride aqueous solution, and adding dopamine hydrochloride to carry out polymerization reaction to obtain flaky aluminum powder coated with a polydopamine layer; the flaky aluminum powder coated with the polydopamine layer is subjected to activating treatment through silver nitrate, and activated flaky aluminum powder is obtained; the activated flaky aluminum powder and a silver-ammonia solution are mixed, a reduction solution is added for a silver mirror reaction, flaky silver-coated aluminum powder is obtained, and the structure of the flaky silver-coated aluminum powder is that the surface of the flaky aluminum powder is sequentially coated with a polydopamine layer and a silver shell layer from inside to outside. And the environmental stability and the corrosion resistance of the flaky silver-coated aluminum powder are improved.

The invention relates to the technical field of PET optical film coatings, in particular to a coating liquid for a PET optical film coating and a preparation method of the coating liquid. The coating liquid for the PET optical film coating is prepared from the following preparation raw materials in parts by mass: 20 to 25 parts of polyurethane acrylic resin, 10 to 15 parts of N-hydroxymethyl acrylamide, 1 to 2 parts of a coupling agent, 4 to 6 parts of a photoinitiator, 8 to 10 parts of modified nano titanium dioxide, 0.2 to 0.3 part of an ultraviolet light absorber and 40 to 47 parts of a reactive diluent. The coating liquid for the PET optical film coating prepared by the invention is excellent in adhesive force, weather resistance, scratch resistance, light transmittance and the like, and has a wide application prospect.

The invention discloses a PVC / CPE modified material and a preparation method thereof, and belongs to the technical field of high polymer materials. The PVC / CPE modified material comprises the following raw materials in parts by weight: 80-100 parts of PVC, 20-40 parts of CPE, 3-30 parts of a plasticizer, 2-4 parts of a modified flame-retardant anti-aging agent, 2-3 parts of a stabilizer and 3-5 parts of a lubricant. The preparation method comprises the following steps: preparing an intermediate 1 from organic silicon resin and 4-((4-(hydroxymethyl) phenyl) (phenyl) amino) benzaldehyde, preparing an intermediate 2 from the intermediate 1 and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, preparing an intermediate 3 from cyanuric chloride and N-butyl-2, 2, 6, 6-tetramethyl-4-piperidylamine, preparing an intermediate 4 from the intermediate 3, and preparing an intermediate 4 from the intermediate 4. And finally preparing the modified flame-retardant anti-aging agent from the intermediate 2 and the intermediate 3. The PVC / CPE modified material prepared by the invention has excellent anti-aging performance and flame retardant performance.

The invention belongs to the technical field of cosmetics, and discloses a cyclodextrin-based water-resistant modified polyurethane film-forming agent and a preparation method thereof. The cyclodextrin-based water-resistant modified polyurethane film-forming agent comprises a hydrophilic chain segment and a hydrophobic chain segment, the hydrophilic chain segment comprises a chain segment formed by raw materials of cyclodextrin and 2, 2-dimethylolbutyric acid, and the hydrophobic chain segment comprises a chain segment formed by a raw material of organosilicon. Compared with the prior art, the cyclodextrin-based water-resistant modified polyurethane film-forming agent disclosed by the invention has good film-forming property, water resistance, dispersity, softness and adhesive force, can also be used as a film-forming material of cosmetic products, and enhances the waterproof, sweat-resistant and lasting characteristics of cosmetics.

The invention relates to the technical field of synthetic fibers, in particular to a high-elasticity textile fiber and a preparation process thereof. The high-elasticity textile fiber is prepared from the polyurethane-polyamide elastomer and the modified diatomite master batch through melt spinning, drafting and winding. According to the invention, hydroxyl-terminated polydimethylsiloxane is used as polyol, and the molar ratio of the polyurethane prepolymer to the polyamide prepolymer is controlled, so that the prepared polyamide-polyurethane elastomer slice has good heat resistance; the molar ratio of isocyanate to polyol and the molar mass ratio of caprolactam to adipic acid are controlled, so that the prepared textile fiber is excellent in mechanical property; 2, 2-dimethylolpropionic acid is used for a chain extension reaction, the molar ratio is controlled, the moisture regain of the prepared textile fiber is 8.58%, and the moisture absorption is high; the diatomite is modified by the quaternary ammonium salt compound, and the addition proportion is adjusted, so that the prepared spinning fiber has good antibacterial performance.

The invention discloses a preparation method of antibacterial fibers and a fabric, and relates to the technical field of textile fabrics. When the antibacterial fiber is prepared, 1, 6-hexanediol, 2-(bromomethyl) diethyl succinate and diethyl 2, 2 ': 6', 2 '-terpyridine-4'-yl phosphonate are polymerized to prepare polyester; the preparation method comprises the following steps: reacting polyester with 7-(dimethylamino) coumarin to prepare modified polyester; the preparation method comprises the following steps: polymerizing maleic anhydride and methyl-vinyl polysiloxane and coating the surface of a phase change microcapsule with the maleic anhydride and the methyl-vinyl polysiloxane to prepare a pre-modified phase change microcapsule; the pre-modified phase change microcapsule and 1-hydroxymethyl-5, 5-dimethyl hydantoin are subjected to a reaction, and a modified phase change microcapsule is prepared; preparing a spinning solution from the modified polyester, the modified phase change microcapsules and copper chloride, performing electrostatic spinning, and performing chlorination finishing to obtain the antibacterial fiber. The antibacterial fiber prepared by the invention has excellent antibacterial, anti-aging, flame-retardant and mechanical properties.

The invention discloses unsaturated polyester resin for an unmanned aerial vehicle fuselage and a preparation method of the unsaturated polyester resin, and relates to the field of high polymer materials. When the unsaturated polyester resin for the unmanned aerial vehicle fuselage is prepared, a flame-retardant monomer reacts with 2-hydroxy-5-(hydroxymethyl) benzaldehyde to prepare a modified flame-retardant monomer; reacting cellulose with acrylic acid to obtain pre-modified cellulose; the pre-modified cellulose, 1-allyl-1, 1, 3, 3-tetramethyldisiloxane and chloroplatinic acid are subjected to a reaction, and modified cellulose is prepared; maleic anhydride, 5-(1H-imidazole-1-yl)-1, 3-phthalic acid, propylene glycol and the modified flame-retardant monomer are subjected to a reaction, and pre-polyester is prepared; and stirring the pre-polyester, zinc chloride, modified cellulose, benzophenone peroxide and styrene to obtain the anti-aging coating. The prepared unsaturated polyester resin for the unmanned aerial vehicle fuselage has good anti-aging, self-repairing, flame-retardant and self-cleaning performance.

The invention discloses a boiler water energy-saving and emission-reducing agent, and relates to the technical field of boiler energy conservation, and the boiler water energy-saving and emission-reducing agent is prepared from the following components: 1, 3-bis ((trihydroxymethyl) methylamino) propane, sodium lignin sulfonate, caffeine, (3, 6-diamino-9-acridinyl) boric acid, a functional copolymer, sodium glycyrrhizinate, hydroxypropyl beta-cyclodextrin and deionized water. The functional copolymer comprises a structural unit introduced by the following monomers: N-acryloyl morpholine, 3-[N, N-dimethyl-[2-(2-methylpropyl-2-enoyloxy) ethyl] ammonium] propane-1-sulfonic acid inner salt, N-trihydroxymethyl methacrylamide, and 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl] ethyl 2-methacrylate. The agent has remarkable scale and corrosion inhibition effects, is safe and environment-friendly to use, and has good energy-saving and emission-reducing effects.

The present invention relates to a preparation method of an intelligent self-repairing, flame-retardant and light-resistant water-based polyurethane coating. The method comprises the following steps: preparing a self-made hyperbranched flame retardant and using it in the synthesis of a polyurethane prepolymer; cooling the mixture to 58° C., adding 2,2-dimethylolpropionic acid, reacting the mixture for 1 to 2 hours, adding 1 to 2 parts of a disulfide compound, reacting the mixture for 1 to 2 hours at 60 to 80° C., adding 1 to 2 parts of a hydrogen bonding agent, reacting the mixture for 1 hour at 60 to 80° C., adding 0.5 to 1.5 parts of a coumarin derivative, and reacting the mixture for 60 to 90° C. The mixture was stirred for 1-2 hours, and then spiropyran, diethanol monoisopropanolamine, and 0.01 parts of p-toluenesulfonamide were added, and the mixture was reacted at 50°C for 30 minutes. The temperature was lowered to 40-45°C, and 1-2 parts of triethylamine were added, and the mixture was reacted for 1-2 hours. The mixture was cooled to room temperature, and 60-65 parts of water were added. The mixture was stirred at a speed of 1800-2000 r / min for 0.5-1 hour to obtain an intelligent self-healing, flame-retardant, and light-resistant water-based polyurethane coating. The flame retardancy and self-healing properties of the obtained water-based polyurethane were significantly improved.

The preparation method comprises the following steps: mixing 20-40 parts by mass of substituted hydroxymethyl glycoluril, 45-85 parts by mass of mercaptocarboxylic acid and 0.5-3 parts by mass of an acidic catalyst, stirring and reacting for 1-10 hours at the temperature of 50-150 DEG C under the pressure condition of-0.01 to-0.1 MPa, adding 300-800 parts by mass of an organic solvent for diluting after the reaction is finished, washing and purifying with deionized water, and collecting an organic layer, thereby obtaining the mercaptan curing agent. Concentrating and drying to obtain the mercaptan curing agent. According to the thiol curing agent, the rigid glycoluril group is introduced, so that the rigidity of a cured product structure is improved, and the mechanical property, the adhesive property, the heat resistance and the damp-heat aging resistance of a cured product are improved; four tertiary amine groups in the substituted glycoluril have a certain self-promotion effect on a thiol curing epoxy reaction, and the curing reaction temperature is reduced under the condition that an accelerant is not added; the glycoluril-containing thiol epoxy resin curing agent disclosed by the invention has good application value and development prospect.

The invention discloses self-adhesion-crosslinking double modified bamboo powder, a preparation method and application, and relates to the technical field of composites.The preparation method of the modified bamboo powder comprises the following steps that S1, bamboo powder, 2, 5-dihydroxyterephthalic acid, 4-aminobenzoyl hydrazine, N, N '-diisopropylcarbodiimide and tris (hydroxymethyl) aminomethane are mixed for a reaction; and S2, trimesic acid is added into the solution obtained after the reaction in the S1 for a reaction, filtering, washing and drying are conducted, and the self-adhesion-crosslinking double modified bamboo powder is obtained. The prepared modified bamboo powder is green and environmentally friendly, through a self-adhesion mechanism, a cross-linking mechanism, a branched-chain phenyl heterogeneous nucleation mechanism and the like, the interfacial compatibility of PBAT and the bamboo powder and the crystallinity of PBAT are improved, and therefore the mechanical property of PBAT / bamboo powder is enhanced.

The invention discloses a granular temporary plugging agent and a preparation method thereof. The granular temporary plugging agent comprises the following components in percentage by mass: 17-23% of acrylamide; 1-2% of a comonomer; 0.2 to 0.27% of a first cross-linking agent; 5-10% of polyvinyl alcohol; 1-2% of a second cross-linking agent; 0.06 to 0.12% of an initiator; 0.01%-0.02% of an initiating auxiliary agent; 3-6% of a modified nano blending material; 0.3%-0.6% of a dispersing agent; and the balance of distilled water. Wherein the first cross-linking agent is one or more of ethylene glycol dimethacrylate, polyethylene glycol diacrylate and trimethylolpropane trimethacrylate; the second cross-linking agent is one or two of a beta-cyclodextrin-boron complex and a glycerol-boron complex; the modified nano blending material is soda lime silicate modified by surface activation-silane coupling modification, and is in the form of hollow microspheres. The in-seam temporary plugging agent system provided by the invention is low in density, good in plugging performance and excellent in degradation performance.

The invention discloses a coating type high-molecular flame-retardant material. The composite material is prepared from the following components: organic silicon modified epoxy resin, a bio-based castor oil derivative, hydroxyapatite, carbon nanofibers, expanded graphite, ammonium polyphosphate, zinc borate, nano silicon dioxide, molybdenum oxide, microencapsulated red phosphorus, magnesium hydroxide, melamine cyanurate, aluminum diethylphosphinate, pentaerythritol, trihydroxymethyl phosphine oxide and a silane coupling agent. The coating is prepared from a titanate coupling agent, stearic acid, polyethylene glycol, 2, 6-butylated hydroxytoluene, triphenyl phosphite, 2, 4-dihydroxybenzophenone, sebacic diester, polytetrafluoroethylene micro powder, a modified polydimethylsiloxane flatting agent, organic montmorillonite, a polyether modified silicon defoaming agent and a solvent. The invention has the beneficial effects of high flame retardant efficiency, environmental friendliness, excellent comprehensive performance and excellent processability.

The invention relates to a hyaluronic acid-polyurethane composite material based on a double dynamic network and a preparation method and application thereof, and the preparation method comprises the following steps: carrying out hydrophobic modification reaction on hyaluronic acid and aminophenylboronic acid to obtain aminophenylboronic acid modified hyaluronic acid; the preparation method comprises the following steps: mixing polytetrahydrofuran ether glycol, polyethylene glycol and isophorone diisocyanate, carrying out a primary reaction, adding trimethylolpropane tri (3-mercaptopropionic acid) ester, carrying out a secondary reaction, adding tannic acid, and carrying out a third reaction to obtain tannic acid-terminated dynamic thionocarbamate polyurethane; and mixing the amino phenylboronic acid modified hyaluronic acid with the tannic acid terminated dynamic thionocarbamate polyurethane for reaction to obtain the hyaluronic acid-polyurethane composite material with the double dynamic networks. Compared with the prior art, by introducing a'thionocarbamate-borate 'double-dynamic network, high toughness, high strength, good self-repairability and repeatable processability in an extreme environment are realized, and the material is particularly suitable for manufacturing and repairing of key components in an LNG ship body and a heat insulation system thereof.

The invention relates to a preparation method of a flame-retardant, high-refraction and melt-drop-resistant water-based polyurethane coating, which comprises the following steps: adding dihydric alcohol, isocyanate and dibutyltin dilaurate into a 500mL flask, heating to 70-85 DEG C, and stirring to react for 1-2 hours to obtain a polyurethane prepolymer; adding a charring agent into the polyurethane prepolymer, and continuously reacting for 1-2 hours; cooling to 60 DEG C, and then adding 2, 2-dimethylolbutyric acid and amino carbon nanotubes to react for 0.5-1 hour; adding a high-refraction material, reacting at 65-70 DEG C for 1-2 hours, cooling to 40 DEG C, adding triethylamine, and reacting for 0.5-1 hour; the preparation method comprises the following steps: adding deionized water, adding an ammonium polyphosphate solution at a rotating speed of 2000r / min, and carrying out high-speed shearing emulsification for 0.5-1h to obtain the flame-retardant, high-refraction and melt-drop-resistant polyurethane coating which has the advantages of high flame retardance, high refractive index and no melt drop.

The invention relates to the technical field of civil engineering preparation, and particularly discloses microorganism synergistic fiber solidified soil and a preparation method thereof. The microorganism synergistic fiber solidified soil is prepared from the following components: sandy soil, modified PE fibers, magnesium oxide, urease bacterium liquid and cementing liquid, the preparation method of the modified PE fiber comprises the following steps: soaking the PE fiber in a solution A; taking out the PE fiber, soaking in the solution B, and drying to obtain the PE fiber. The solution A is composed of 12-18 mmol / L of catechol and 4-6 mmol / L of tetraethylenepentamine, and a solvent is a hydroxymethyl aminomethane aqueous solution; the solution B is prepared from 8 to 12 mmol / L of KH-550 silane coupling agent and 16 to 24 mmol / L of EOS tetraethyl silicate, and the solvent is ethanol. According to the microorganism synergistic fiber solidified soil provided by the invention, an MICP-based soil body solidification effect enhancing technology is perfected, so that the mechanical property and the anti-permeability performance of the solidified soil are improved.

The present invention generally relates to novel pharmaceutical formulations containing 2-[3,5-Bis(trifluoromethyl)phenyl]-N-{4-(4-fluoro-2-methylphenyl)-6-[(7S,9aS)-7-(hydroxymethyl)hexahydropyrazino[2,1-c][1,4] oxazin-8(1H)-yl]-3-pyridinyl}-N,2-dimethylpropanamide, methods of preparation thereof and their use in medical therapy.

The invention relates to a rapid detection kit for large yellow croaker pyramidal worm, and belongs to the field of pathogen biological diagnosis in aquaculture. The kit comprises a nucleic acid releasing agent and further comprises a primer and a probe which are used for detecting the large yellow croaker pyramidal worm. The kit comprises a nucleic acid releaser; the formula of the nucleic acid releasing agent comprises tris (hydroxymethyl) aminomethane hydrochloride with the final concentration of 100 mM, sodium chloride with the final concentration of 100 mM, sodium dodecyl sulfate with the final concentration of 1 wt%, sodium alpha-olefin sulfonate with the final concentration of 3 wt%, sodium lauroyl glutamate with the final concentration of 1.2 wt%, betaine with the final concentration of 1 wt% and water as a solvent. The sequences of the primer and the probe for detecting the Pseudosciaena crocea pyramidal are 5 '-TATGGGCAATTCTGAATCCT-3', 5 '-TCTTTTCTGATCCCTGAAT-3' and 5 '-FAM-GTCGGTGGAGTGATTTGTTTG-3'. The kit disclosed by the invention is simple to operate, provides a tool for diagnosis, prevalence monitoring, prevention and control of the Pseudosciaena crocea pyramidal, and has a very high application value.

The invention discloses a method for preparing tetrakis hydroxymethyl phosphonium sulfate by using high-concentration hydride, and belongs to the technical field of preparation of tetrakis hydroxymethyl phosphonium sulfate. The method for preparing tetrakis hydroxymethyl phosphonium sulfate by using the high-concentration hydride comprises the following steps: step 1, adding concentrated sulfuric acid and formaldehyde into a reaction kettle, uniformly stirring and mixing, then adding an organic catalyst and a modified surfactant, and continuously stirring to completely and uniformly mix reactants to obtain a mixed solution; 2, hydride is introduced into a reaction kettle through a pipeline and reacts with the mixed solution, a heating reaction is conducted, after the reaction is finished, the pipeline is closed, and a reaction solution is obtained; and 3, carrying out vacuum concentration treatment on the reaction liquid, and recrystallizing to obtain tetrakis hydroxymethyl phosphonium sulfate. The tetrakis hydroxymethyl phosphonium sulfate prepared by the method has excellent yield and purity.

The invention relates to the technical field of medical materials, in particular to an injection composition for endoscopic submucosal dissection and a preparation method and application thereof. The injection composition is prepared from the following raw materials: 1 to 5 w / v percent of sodium hydroxymethyl starch, 0.1 to 10 w / v percent of acetylcysteine, 0.2 to 4 w / v percent of polyvinylpyrrolidone, 0.001 to 0.1 w / v percent of coloring agent and the balance of phosphate buffer solution. The injection composition disclosed by the invention can be directly injected under mucous membranes, plays a role in upheaving diseased regions, has the advantages of long maintenance time and high upheaving degree, and has the effects of stopping bleeding and promoting wound healing.

The invention discloses high-performance anti-wear engine lubricating oil as well as a preparation method and application thereof. The high-performance anti-wear engine lubricating oil is prepared from the following raw materials: self-developed lubricating oil base oil, poly-alpha-olefin, zinc dialkyl dithiophosphate, calcium sulfonate, polyisobutylene succinimide, an antioxidant, polymethacrylate, an organic molybdenum complex, a de-foaming agent and a pour point depressant. The preparation method comprises the following steps: 1) synthesizing 9, 10-bis (2-tert-butyl-4-methylphenoxy) trimethylolethane stearate as base oil of the lubricating oil; and 2) mixing the base oil with other assistants to obtain the high-performance anti-wear engine lubricating oil. According to the preparation method, novel-like synthetic ester oil is firstly prepared, a phenol group and a large steric hindrance substituent group are introduced into a polymer, the anti-oxidation function is directly built in base oil molecules, meanwhile, super-strong heat resistance is achieved, and finally the high-performance anti-wear engine lubricating oil is obtained and can be applied to high-end application scenes such as aero-engines or gas turbines.

The present invention provides for novel methods for regulating and detecting the cytosine methylation status of DNA. The invention is based upon identification of a novel and surprising catalytic activity for the family of TET proteins, namely TET1, TET2, TET3, and CXXC4. The novel activity is related to the enzymes being capable of converting the cytosine nucleotide 5-methylcytosine into 5-hydroxymethylcytosine by hydroxylation.

The invention provides a non-disease diagnosis purpose 5-hydroxymethylcytosine 5hmC detection method and a non-disease diagnosis purpose 5-hydroxymethylcytosine 5hmC detection kit. The detection method comprises the following steps: S1, glycosylation treatment; s2, carrying out enzyme digestion treatment on the GSREs; s3, carrying out APOBEC deamination treatment; s4, carrying out hydroxymethylation detection; the kit comprises a glycosylation reaction kit, a GSREs enzyme digestion reaction kit, an APOBEC deamination reaction kit and a PCR (Polymerase Chain Reaction) kit. The glycosylation reaction kit comprises a CutSmart buffer solution, UDP-Glucose, a T4-BGT enzyme and nuclease-free water, wherein the CutSmart buffer solution, the UDP-Glucose and the T4-BGT enzyme are used as raw materials; the GSREs enzyme digestion reaction kit comprises a GSREs enzyme, an enzyme digestion reaction buffer solution and nuclease-free water, the APOBEC deamination reaction kit comprises APOBEC, BSA (Bovine Serum Albumin), an APOBEC Reactive buffer solution and nuclease-free water; the PCR kit comprises a PCR reaction solution, a primer and a probe. According to the 5-hydroxymethylcytosine 5hmC detection method and kit for non-disease diagnosis purpose provided by the invention, precise quantification of extremely high specificity of 5hmC is realized, and the detection sensitivity is also improved while the specificity of a detection signal is improved.

The invention discloses a halogen-free low-splashing environment-friendly solder wire and a preparation method thereof, and relates to the technical field of electronic welding materials, and the halogen-free low-splashing environment-friendly solder wire is prepared from the following raw materials in percentage by mass: 1-4wt% of halogen-free scaling powder and the balance of lead-free solder; the lead-free solder is composed of the following components of Cu, Bi, Al, Ga, Ir, Ca, In and Sn. The halogen-free scaling powder comprises the following components: (3, 6-diamino acridine-9-yl) boric acid, glycerol triabietate, 3-(N-morpholinyl)-2-hydroxy propanesulfonic acid sodium salt, 3-trihydroxymethyl methylamino-2-hydroxy propanesulfonic acid, hexahydro-1, 3-ethoxy-s-triazine, a functional copolymer, a surface active agent, a corrosion inhibitor, a halogen-free activity reinforcing agent, an antioxidant, a solvent and rosin resin. The solder wire is low in splashing rate, high in surface resistivity and welding spot reliability, free of obvious corrosivity and good in weldability.

The invention relates to the field of fabrics, in particular to a metallic yarn fabric based on a discontinuous aluminum layer and a processing technology thereof.The metallic yarn and polyester fibers are blended to serve as warps, the polyester fibers serve as wefts, the warps and the wefts are interwoven to obtain base cloth, the base cloth is subjected to discontinuous etching in the warp direction through etching liquid, and the pretreated base cloth is obtained; transferring the fabric into antibacterial finishing liquid for padding treatment to prepare the fabric. Modified waterborne polyurethane emulsion containing silicon and nitrogen elements is introduced into finishing liquid, polytetrahydrofuran glycol, hydroxyl-terminated polydimethylsiloxane and isophorone diisocyanate are used as raw materials, 2, 2-bis (hydroxymethyl) propionic acid is used as a hydrophilic chain extender, and cyanuric chloride derivative glycol based on menthol is used as a chain extender; the preparation method comprises the following steps: introducing nano zinc oxide as a finishing agent into a finishing liquid, firstly aminating the nano zinc oxide by using 3-aminopropyltriethoxysilane, then obtaining phytic acid modified nano zinc oxide by using electrostatic and hydrogen-bond interaction, and further grafting cyanuric chloride derivative diol based on menthol.

The present invention provides for novel methods for regulating and detecting the cytosine methylation status of DNA. The invention is based upon identification of a novel and surprising catalytic activity for the family of TET proteins, namely TET1, TET2, TET3, and CXXC4. The novel activity is related to the enzymes being capable of converting the cytosine nucleotide 5-methylcytosine into 5-hydroxymethylcytosine by hydroxylation.

The invention relates to the field of phenolic resin adhesives, and particularly discloses a preparation method of a phenolic resin adhesive for a bamboo oriented strand board, which comprises the following steps: (1) phenol activation: adding phenol and a basic catalyst aqueous solution into a reaction kettle, and activating to form an intermediate state of phenate negative ions; (2) addition stage: adding a high-concentration formaldehyde reactant into the reaction kettle, and carrying out heat preservation reaction to generate hydroxymethyl phenol; (3) heating and replenishing: heating to 80 + / -2 DEG C, keeping the temperature, replenishing the formaldehyde aqueous solution into the reaction kettle, and keeping the temperature for 20-25 minutes; (4) polycondensation stage: adding a basic catalyst aqueous solution, heating to 90 + / -2 DEG C, and carrying out heat preservation reaction; and (5) terminating the reaction: after the heat preservation reaction, detecting the viscosity, cooling, and discharging to obtain the adhesive. The phenolic resin with the solid content of 60% or above can be prepared, the adhesive has excellent bonding performance, and the prepared shaving board is excellent in mechanical strength.

The invention relates to the field of plastics, in particular to a scented polyethylene garbage bag and a preparation method thereof. The composite silica aerogel microcapsules use porous silica aerogel as a carrier of natural plant essential oil to prepare silica aerogel microcapsules, load a polydopamine outer layer on the surface of the microcapsules through oxidative self-polymerization of dopamine, and then graft composite quaternized polyethyleneimine on the surface; bio-based diols are obtained by reacting bio-vanillin and cystamine dihydrochloride, and then the bio-based diols are synthesized with natural castor oil and isophorone diisocyanate under the action of a catalyst to synthesize a prepolymer, use 2,2-dihydroxymethylbutyric acid as a hydrophilic chain extender, use 4-amino-3-methylphenol with a rigid hydrophobic benzene ring structure and antibacterial phenolic hydroxyl groups as a capping agent, and use composite quaternized polyethyleneimine as a crosslinking agent to synthesize a modified bio-based polyurethane emulsion.

The invention relates to the technical field of plastics, in particular to a high-strength antibacterial plastic packaging bottle and a preparation method thereof.The preparation method comprises the steps that polylactic acid, poly (butylene succinate), epoxidized soybean oil and composite zinc oxide are mixed, extruded, granulated and blow-molded, and a base part is obtained; mesoporous nano-zinc oxide is used as a carrier to carry tea polyphenol, then carboxymethyl chitosan is used for coating, and an epoxy compound containing a Si-O chain segment is grafted; preparing a protective coating from composite zinc oxide and soybean oil-based self-repairing waterborne polyurethane, and coating the surface of a substrate with the protective coating; soybean oil-based polyol, polytetrahydrofuran ether glycol and isophorone diisocyanate are used as raw materials to prepare a polyurethane prepolymer, 2, 2-bis (hydroxymethyl) propionic acid is used as a hydrophilic chain extender, an epoxy compound containing a Si-O chain segment is used as a modifier, 1, 4-butanediol and dithiodiethanol are used as end-capping reagents, triethylamine is used as a neutralizer, and the polyurethane prepolymer is prepared by a one-step method. And ethylene diamine and tetraethylenepentamine are used as amine cross-linking agents to prepare the soybean oil-based self-repairing waterborne polyurethane.