2766 results about "Glyceride" patented technology

The invention relates to the technical field of folding screen supporting films, and particularly discloses a double-layer buffering supporting film for a flexible folding display screen and a preparation method of the double-layer buffering supporting film. The double-layer buffer supporting film for the flexible folding display screen sequentially comprises a release film layer, a first adhesive layer, a first stainless steel layer, a second adhesive layer, a second stainless steel layer and a protective film layer from top to bottom, the first adhesive layer and the second adhesive layer are prepared by curing the same pressure-sensitive adhesive composition; the pressure-sensitive adhesive composition is prepared from the following raw materials: acrylate copolymer, hydrogenated rosin glyceride, hyperbranched polyesteramide-dopamine conjugate, acylhydrazone bond modified siloxane, a curing agent and a silane coupling agent; the protective film layer comprises the following raw materials: PET particles, nano silicon dioxide, an ethylene-vinyl acetate copolymer and an antioxidant. The double-layer buffer supporting film has the advantages of being high in supporting rigidity and interlayer peel strength, and serious folds caused by long-term repeated folding of the folding screen can be relieved.

The invention relates to the technical field of textiles, and discloses a cool and washable bio-based nylon 56 fabric and a preparation method thereof. The preparation method of the cool and washable bio-based nylon 56 fabric comprises the following steps: loading modified nano aluminum oxide on modified aluminum nitride microchips to obtain a composite cool material; nylon 56, an ethylene-methyl acrylate-glycidyl methacrylate terpolymer, polypentamethylene guanidine hydrochloride and a composite cool feeling material are subjected to blending extrusion and melt spinning, and then the bio-based nylon 56 fabric is woven. Mixing the composite modified boron nitride and ethanol to obtain finishing liquid; spraying the finishing liquid on one side of the bio-based nylon 56 fabric, and drying to obtain the cool washable bio-based nylon 56 fabric. The cool and washable bio-based nylon 56 fabric disclosed by the invention has excellent cool feeling, antibacterial property, washable property, moisture absorption property and unidirectional perspiration property.

A biodegradable polymer composite, a method of making the same and use for same are provided. The biodegradable polymer composite has about 30 to 99.5% by weight of a polymer selected from a group consisting of polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), polyhydroxyalkanoates (PHA), and polycaprolactone (PCL) grafted with a compatibilizer selected from a group consisting of maleic anhydride, glycidyl methacrylate, pyromellitic anhydride, acrylic acid, polyacrylic acid, methylene diphenyl diisocyanate, poly(glycidyl methacrylate, copolymer(s) of glycidyl methacrylate; and about 0.5 to 50 % by weight a nano-filler or a micro-filler. The biodegradable polymer composite does not contain polylactic acid. Surfaces of the nano-filler or the micro-filler may be modified using a grafting agent so that the biodegradable polymer composite has enhanced mechanical properties, increased heat resistance, compostablity and / or improved processability. The biodegradable polymer composite may be used to make flexible articles, such as a freezer wrap and a farming sheet.

The invention discloses a polytetrafluoroethylene film with high tensile strength and a preparation process thereof, and relates to the technical field of polytetrafluoroethylene films. The preparation method comprises the following steps: step 1, preparing a composite raw material: S1-1, sequentially putting a tetrafluoroethylene copolymer into acetone and methanol to be soaked, washed and dried; dispersing in a glycidyl methacrylate-methanol solution, and carrying out irradiation grafting in a nitrogen atmosphere; filtering, washing and drying to obtain an epoxy tetrafluoroethylene copolymer; s1-2, sequentially putting an epoxy tetrafluoroethylene copolymer and a composite filler into tetrahydrofuran, stirring for 24-48 hours at the temperature of 70-75 DEG C in a nitrogen atmosphere, filtering, washing and drying to obtain a composite raw material; 2, mixing polytetrafluoroethylene, the composite raw material and carboxylated polyphenylene sulfide to obtain a mixture; performing cold press molding and temperature-controlled sintering to obtain a basic film; 3, the basic film is subjected to turning forming and continuous rolling, and the polytetrafluoroethylene film is obtained.

The preparation method comprises the following steps: S1, crushing cordate houttuynia rhizomes, adding the crushed cordate houttuynia rhizomes into a mixed acid aqueous solution, and carrying out immersion treatment to obtain a cordate houttuynia mixed solution; s2, adjusting the pH value of the herba houttuyniae mixed solution to 4-5, adding pectinase, carrying out primary enzymolysis and enzyme deactivation, adjusting the pH value to 6-7, adding compound enzyme, carrying out secondary enzymolysis and enzyme deactivation, so as to obtain an enzymatic hydrolysate; s3, menthol is added into the enzymatic hydrolysate, water extraction is conducted, and water extract and filter residues are obtained; s4, the filter residues are added into ethyl alcohol, then salicylic acid and diacetyl tartaric acid ester of mono (di) glycerides are added, alcohol extraction and filtering are conducted, and an alcohol extraction solution is obtained; s5, mixing the water extract with the alcohol extract, and performing reduced pressure distillation to obtain the herba houttuyniae extract. According to the method, the extraction rate of polysaccharide and flavone in houttuynia cordata can be effectively increased, and meanwhile, the prepared houttuynia cordata extract has better oxidation resistance and has a good application prospect.

The invention discloses a carbon fiber reinforced polyamide composition as well as a preparation method and application thereof. The carbon fiber reinforced polyamide composition comprises the following components in parts by weight: 25-60 parts of polyamide resin; 30 to 65 parts of carbon fiber; 2-8 parts of a toughening agent; 0.5 to 6 parts of compatilizer; wherein the compatilizer is ethylene-acrylic ester grafted methacrylic ester glycidyl ester. Ethylene-acrylate grafted glycidyl methacrylate is added into the carbon fiber reinforced polyamide composition to serve as a compatilizer, ethylene-acrylate and carbon fibers have good compatibility, and GMA and polyamide resin end group reaction have good compatibility. And the toughening agent is cooperated, so that the prepared material has relatively good mechanical properties and good appearance.

The invention relates to a degradable epoxy resin composite material with an adjustable curing speed, and a preparation method and a mild total recycling method thereof. Existing degradable epoxy resin has the problems of high cost, harsh degradation conditions and the like, and is difficult to meet the requirements of different application scenes on curing speed and temperature at the same time. The invention provides an epoxy resin composite material which comprises curing agent components (an epoxy resin amine curing agent and an ester-containing polythiol curing agent) and epoxy resin components (glycidyl ether epoxy resin, glycidyl amine epoxy resin and glycidyl ester epoxy resin). The cured composite material can be fully recycled through catalytic degradation under mild conditions by using a lewis acid and an amino group breaking ester bond mechanism, and the degradation product can be directly used as a curing agent, a toughening agent and a chain extender. The epoxy resin composite material disclosed by the invention not only has adjustable curing speed and high use performance, but also realizes environmental friendliness and resource recycling, and provides a new solution for sustainable development of epoxy resin.

The invention provides transparent high-impact-resistance heat-resistant MBS (methyl methacrylate-butadiene-styrene) resin and a preparation method thereof, and relates to the field of high polymer material preparation methods, the transparent high-impact-resistance heat-resistant MBS resin is prepared from the following raw materials: water, ethanol, maleic anhydride, an emulsifier, MBS resin grafted latex, potassium persulfate and an antioxidant; the MBS resin grafted latex is prepared from the following raw materials: water, modified styrene-butadiene latex, sodium hydrogen sulfite, potassium persulfate, methyl methacrylate and styrene, the modified styrene-butadiene latex is prepared from the following raw materials: a pre-emulsion, glycidyl methacrylate, ammonium persulfate, divinyl benzene and potassium persulfate; the pre-emulsion is prepared from the following raw materials: water, an emulsifier, butadiene and styrene. The product is good in heat resistance and good in PVC modification effect, and the modified PVC composite material is high in light transmittance, high in cantilever beam impact strength and resistant to aging.

The invention relates to a poly-(2-oxazoline) epoxy derivative and application thereof, and belongs to the technical field of crosslinking. The invention provides a poly-(2-oxazoline) epoxy derivative, which is completely different from existing cross-linking agents such as 1, 4-butanediol diglycidyl ether (BDDE), divinyl sulfone, glycidyl methacrylate and the like in structure, and has the advantages that the structure is simple; the polymer can be used as a cross-linking agent for cross-linking natural high-molecular polymers such as polysaccharide (such as hyaluronic acid) and protein and synthetic high-molecular polymers such as polyethylene glycol and polyvinyl alcohol. Compared with an existing cross-linking agent, the poly-(2-oxazoline) epoxy derivative has the advantages that the poly-(2-oxazoline) epoxy derivative can be easily subjected to a cross-linking reaction with high-molecular polymers such as hyaluronic acid, the prepared cross-linked substances such as sodium hyaluronate gel are more stable and uniform, the performance of the prepared cross-linked substances is easier to regulate and control and the like, and the poly-(2-oxazoline) epoxy derivative has a great application prospect.

The invention discloses an interface covalently bonded core-shell structure boron nitride polypropylene composite dielectric material and a method. The interface covalently bonded core-shell structure boron nitride polypropylene composite dielectric material comprises a maleic anhydride grafted polypropylene matrix and a core-shell structure filler dispersed in the maleic anhydride grafted polypropylene matrix, the core-shell structure filler comprises hydroxylated boron nitride nanoparticles covalently grafted on a polymer shell layer on the surface of the core-shell structure filler; the polymer shell layer is polyglycidyl methacrylate; the epoxy group of the polymer shell layer reacts with the anhydride group of the maleic anhydride grafted polypropylene matrix to form a covalent bond. The invention has the characteristics of strong interface bonding force, uniform filler dispersion, and excellent comprehensive electrical properties and processability.

The invention discloses a magnetic ion exchange resin and a preparation method thereof, and the preparation method comprises the following steps: preparing a reaction solution which comprises magnetic particles, glycidyl methacrylate, divinylbenzene and a photoinitiator; the mass ratio of the glycidyl methacrylate to the divinyl benzene is (4.5-10): 1; an ultraviolet-initiated polymerization step: irradiating the reaction solution by ultraviolet light to initiate a polymerization reaction to obtain magnetic microspheres; a functional modification step: mixing the magnetic microspheres with an ammoniation reagent for ammoniation reaction to prepare ammoniated magnetic microspheres; and mixing the ammoniated magnetic microspheres with an alkylation reagent, and carrying out an alkylation reaction to prepare the magnetic ion exchange resin. According to the method, the production time is remarkably shortened, the extra energy consumption is reduced, and the process production flow is effectively simplified.

The invention relates to an epoxy core-shell polymer particle and resin, a preparation method of the epoxy core-shell polymer particle and resin and application of the epoxy core-shell polymer particle and resin to epoxy resin. The preparation method of the epoxy core-shell polymer particle comprises the following steps: heating and mixing a polybutadiene seed emulsion, a reducing agent, an emulsifier and the like; adding methyl methacrylate and an initiator, and glycidyl methacrylate and an initiator, and heating to react; compared with the prior art, the core-shell particle with the outer layer of the synthesized shell containing the epoxy group can be used for toughening the epoxy resin, so that the toughness of the epoxy resin is effectively improved while the excellent heat resistance and mechanical properties of the epoxy resin are maintained.

The invention relates to a biodegradable composite material as well as a preparation method and application thereof, and belongs to the technical field of compositions of high-molecular compounds. The biodegradable composite material is prepared from the following components in parts by weight: 46 to 87 parts of PBAT resin, 2 to 10 parts of PLA resin, 10 to 40 parts of calcium carbonate, 0.5 to 2 parts of a slipping aid and 0.5 to 2 parts of an edge sealing aid, the molar content of D-lactic acid in the PLA resin is greater than or equal to 2%; the particle size D50 of the calcium carbonate is less than 1.8 microns; the edge sealing auxiliary agent is an ethylene-acrylic acid copolymer, an ethylene-vinyl acetate copolymer, an ethylene-methyl acrylate copolymer, an ethylene-methyl acrylate-glycidyl methacrylate terpolymer, an ethylene-butyl acrylate copolymer, an ethylene-butyl acrylate-glycidyl methacrylate terpolymer, an ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer, an ethylene-vinyl acetate copolymer and an ethylene-vinyl acetate copolymer. And at least one of epoxy resin. The biodegradable composite material has excellent long-acting edge sealing performance.

The invention relates to the technical field of gel materials, and discloses whitening gel based on biological polysaccharide and a preparation method thereof, the whitening gel comprises the following raw materials: hyaluronic acid, deionized water and thunberg fritillary bulb polysaccharide microcapsules; wherein the bulbus fritillariae thunbergii polysaccharide microcapsule is prepared by taking konjac glucomannan, chitosan and perillaldehyde modified hyaluronic acid as a shell layer and embedding bulbus fritillariae thunbergii polysaccharide and glabridin as a core material; the perillaldehyde modified hyaluronic acid is prepared by reacting alkenyl hyaluronic acid with perillaldehyde under the action of an initiator; the alkenyl hyaluronic acid is prepared by reacting hyaluronic acid with glycidyl methacrylate under the action of a catalyst. The prepared whitening gel has excellent whitening, moisturizing, anti-oxidation and anti-aging effects, effective components are not prone to loss, and the whitening gel can be applied to the skin surface for a long time, plays a whitening role and delays the aging process of the skin.

The invention relates to the field of foaming materials, in particular to a low-solvent-residue expandable polystyrene material and a preparation method thereof. The expandable polystyrene material with low solvent residue comprises the following raw materials in percentage by weight: 0.35-0.45% of a free radical initiation system, 0.35-0.45% of S, S, S, S, S, S, S, S, S, S, S, S, S, S, S According to the present invention, the material comprises, by weight, 0.1-0.15% of S, S '-bis (alpha, alpha'-dimethyl-alpha ''-acetoxy) trithiocarbonate, 0.15-0.2% of ascorbic acid, 0.1-0.2% of a nucleating agent, 0.2-0.3% of a suspending agent, 0.001-0.003% of an emulsifier, 5-6% of a foaming agent, 0.15-0.25% of a plasticizer, 0.001-0.002% of hydroxyethyl cellulose, 0.05% of sodium phosphate, 0.1-0.2% of zinc stearate, and 0.1-0.2% of glyceryl stearate, the obtained material has low solvent residue, meets food safety requirements, and is suitable for food packaging.

The invention belongs to the technical field of 3PE corrosion prevention, and particularly relates to a high-temperature-resistant and cathodic disbonding-resistant 3PE corrosion-resistant pipeline and a preparation method thereof. A pipeline epoxy bottom layer, a middle adhesive layer and a polyethylene surface layer are subjected to systematic chemical synergistic modification, specifically, the epoxy bottom layer is modified with phenolic resin and amino silane, and a heat-resistant compact barrier is formed; the middle layer reacts with maleic anhydride grafted polyethylene through amino silane to construct a chemical bridge for simultaneously connecting the upper layer and the lower layer; the surface layer is grafted with high-density polyethylene through fluoroprimary amine modified glycidyl methacrylate, and a hydrophobic and oleophobic chain and a reactive functional group are introduced; according to the structure, through the synergistic effect of the high-temperature stability of the bottom layer, the two-way chemical bridging capacity of the middle layer and the inert hydrophobic characteristic of the surface layer, the long-term use temperature upper limit, the stripping resistance and the medium infiltration resistance of the pipeline are improved, and a solution is provided for long-term protection of the pipeline in the severe environment.

The invention belongs to the technical field of high polymer materials, and particularly relates to a high-strength papermaking forming net fiber. Comprising the following raw materials in parts by weight: 75-90 parts of polyethylene glycol terephthalate, 5-15 parts of polybutylene terephthalate, 3-10 parts of a modified fiber filler, 2-5 parts of modified graphene, 2-8 parts of silicon dioxide, 0.5-2 parts of a silane coupling agent KH-560, 1-3 parts of an anti-hydrolysis agent, 0.5-1.5 parts of an antioxidant and 0.3-1 part of a lubricant. Wherein the modified fiber filler is prepared by sequentially carrying out modification processes such as silane coupling agent, citric acid-glycerol esterification, iron bismuth oxide loading and the like on glass fibers; the modified graphene is prepared by introducing dopamine, cerium ions and glycidyl methacrylate for modification. The mechanical strength, the hydrolysis resistance and the wear resistance of the fiber are remarkably improved through the synergistic effect of all the components and the melt spinning-multi-stage stretching process, and the fiber is particularly suitable for a forming net of a high-speed paper machine.

The invention discloses a near-infrared responsive injectable MXene / fibroin / carboxymethyl chitosan / oxidized hyaluronic acid nano composite hydrogel SCO (at) M, and relates to the technical field of biomedical materials. The method disclosed by the invention comprises the following steps: 1) preparing an MXene single-layer nanosheet by adopting LiF-HCl in-situ HF etching; (2) modifying the fibroin through glycidyl methacrylate to obtain SF-MA; 3) oxidizing hyaluronic acid with sodium periodate to obtain oxidized hyaluronic acid OHA; (4) uniformly dispersing MXene in the SF-MA solution, and sequentially adding carboxymethyl chitosan CMCS and OHA, so as to prepare the injectable nano composite soft hydrogel with the shear thinning characteristic; and 5) through ultraviolet irradiation crosslinking, rapid in-situ curing of the hydrogel is realized, and the mechanical strength of the hydrogel is improved. The hydrogel provided by the invention has excellent injectability and mechanical property, has good photo-thermal antibacterial property, oxidation resistance and cell compatibility, can be used as a carrier of cells, medicines and bioactive substances in the field of biological medicines, and has a wide application prospect.

The invention relates to the field of automobile part manufacturing, and particularly discloses a barrier layer direct bonding type TPE material for an automobile air conditioner pipeline system and a preparation method and application of the barrier layer direct bonding type TPE material. The TPE material is prepared from the following raw materials: a thermoplastic elastomer TPE, PA, EVOH, polyether block amide, a glycidyl methacrylate grafted olefin copolymer elastomer, a toughening compatilizer, composite modified montmorillonite, a cold-resistant additive, an antioxidant and paraffin oil. Wherein the composite silane coupling agent, lauric acid and N, N '-carbonyldiimidazole are adopted to modify the nano-montmorillonite, so that the dispersity of nano-montmorillonite particles is improved, the formation of aggregates is effectively reduced, and the mechanical property of the material is enhanced; the polyether block amide, the glycidyl methacrylate grafted olefin copolymer elastomer and the toughening compatilizer have a synergistic effect, so that good adhesiveness of the TPE material and the barrier layer is realized.

The invention relates to the field of water-based environment-friendly ink, and discloses water-based environment-friendly mutual exclusion ink which comprises the following components: water-based polyurethane-acrylic hybrid resin; a nanocellulose crystal; modifying the plant polyphenol pigment; and gamma-valerolactone; a polyglycerol ester surfactant; a pH response type microcapsule; the invention further provides a preparation method of the water-based environment-friendly mutual-exclusion ink. The preparation method comprises the following steps: S1, preparing the nanocellulose crystal; s2, plant polyphenol pigment modification; s3, preparing a pH response type microcapsule; s4, synthesizing waterborne polyurethane-acrylic acid hybrid resin; and S5, constructing an ink system. According to the invention, a dynamic crosslinking technology of the waterborne polyurethane-acrylic hybrid resin is adopted, so that the flexibility and durability of the ink after coating are remarkably improved, the ink has better recovery capability and stronger mechanical properties, breakage or falling of the ink under stress is avoided, and the service life of the ink is prolonged.

The invention relates to the field of coatings, and discloses a biomass-based oil-resistant coating and a preparation method thereof, the coating comprises an additive solution, a paraffin solution and gallic acid; the paraffin solution is obtained by dissolving paraffin in absolute ethyl alcohol; a preparation method of the additive solution comprises the following steps: mixing chitosan powder and an acetic acid aqueous solution to prepare a chitosan solution, ultrasonically dispersing functionalized montmorillonite in deionized water to prepare a suspension, then uniformly mixing the chitosan solution and the suspension, adding modified phytic acid prepared by grafting phytic acid and ethylene glycol diglycidyl ether, and stirring to react; the functional montmorillonite is prepared by modifying modified montmorillonite with titanium dioxide and zinc oxide, then activating the modified montmorillonite with 3-aminopropyltriethoxysilane and succinic anhydride, and then carrying out a ring-opening reaction with glycidyl neodecanoate. The coating prepared by the invention has high water resistance, the Kit oil-proof grade is kept at grade 12, and the oil-proof performance of the coating is greatly improved. Meanwhile, the antibacterial performance, the tensile index and the ultraviolet aging resistance are relatively high.

The invention discloses a high-toughness biaxially oriented nylon film and a production method thereof. Comprising the following raw materials in parts by weight: 40-50 parts of copolymerized nylon resin, 10-20 parts of nylon 12, 15-25 parts of thermoplastic polyamide elastomer, 3-6 parts of nanofiller, 1-3 parts of coupling agent, 10-20 parts of reinforced fiber, 5-8 parts of additive, 3-7 parts of ethylene-methyl acrylate-glycidyl methacrylate terpolymer and 6-10 parts of modified cellulose nanocrystal. The invention relates to a flame-retardant polyamide resin, which is prepared from the following components in parts by weight: 2-4 parts of amino-terminated hyperbranched polyamide and 1-3 parts of 3, 3 '-diamino-4, 4'-difluorodiphenyl sulfone. The film is high in tensile strength, good in tear resistance and excellent in barrier property and low-temperature impact resistance.

The invention relates to the technical field of biomedical materials, and discloses a thrombectomy stent support material and a preparation process thereof, the thrombectomy stent support material comprises the following components by mass: 60-70% of a polysebacic diglyceride prepolymer; 25-35% of a dynamic covalent bond cross-linking agent; 5%-10% of carboxylated nano-diamond; 3 to 5 percent of temperature-sensitive and photo-thermal dual-response microspheres; the dynamic covalent bond cross-linking agent is composed of 4-formyl phenylboronic acid and hexamethylenediamine according to a molar ratio of 1: (1-3); the microsphere is prepared from poly (N-isopropylacrylamide), a gold nanorod and a recombinant tissue type plasminogen activating agent, and by combining a low-temperature 3D printing technology, the material can form a complex bionic structure, the mechanical strength is dynamically adjusted along with the physiological environment after implantation, and the material is safely degraded after functions are completed. The material is suitable for the scenes of cardiovascular and cerebrovascular stents, bone repair instruments and the like, has treatment accuracy, manufacturing suitability and clinical safety, and solves the problems of non-degradability, sudden drug release, mechanical mismatch and the like of traditional implants.

The invention discloses a polyurethane modified epoxy resin adhesive as well as a preparation method and application thereof, and the polyurethane modified epoxy resin adhesive is prepared from the following components in parts by mass: 7-10 parts of E51 type bisphenol A diglycidyl ether, 3.5 parts of a phenolic aldehyde amine T31 curing agent and 1-3 parts of synthetic polyurethane, the synthetic polyurethane is prepared from polyether triol, polyether amine, isophorone diisocyanate and glycerol carbonate, and a blending system of the synthetic polyurethane and bisphenol A diglycidyl ether is adopted to be subjected to covalent crosslinking with phenolic aldehyde amine T31, so that the adhesive has high toughness and strength guarantee; the synthetic polyurethane prepared by the method is obtained through simple, green and efficient solvent-free synthesis, and the synthesized product has certain fluidity at room temperature, so that the subsequent stirring preparation process of an adhesive is facilitated. And a solvent-free synthesis method is adopted, so that the use of a toxic organic solvent in the traditional polyurethane synthesis process is avoided, and the synthesis process is greener.

The invention relates to the technical field of ABS (Acrylonitrile Butadiene Styrene) materials, in particular to an impact-resistant composite ABS plate and a preparation method thereof. The impact-resistant composite ABS plate is prepared from the following raw materials in parts by mass: 100 to 200 parts of emulsion ABS resin, 10 to 20 parts of butadiene monomer, 5 to 10 parts of methyl methacrylate, 1 to 5 parts of glycidyl acrylate, 1 to 5 parts of maleic anhydride, 5 to 15 parts of styrene, 1 to 5 parts of aminated silicon dioxide, 0.1 to 0.5 part of benzoyl peroxide, 0.1 to 0.3 part of triethylamine, 0.1 to 1 part of emulsifier and 0.01 to 0.1 part of first initiator, 0.05-0.2 part of a second initiator, 1-3 parts of oxidized polyethlene wax, 1-2 parts of a lubricant and 1-3 parts of an antioxidant. The invention solves the contradiction between the heat resistance and impact strength of the ABS resin, has obvious advantages compared with the traditional modification system, and completely meets the application requirements of the plate in a high-temperature vibration environment.

The invention provides a glyceryl triacetate production parameter control method and system based on reinforcement learning, and relates to the technical field of optimization control methods, and the method comprises the steps: obtaining the production parameters of glyceryl triacetate; based on the kinetic model, constructing a kinetic equation of the esterification reaction of glycerol and acetic acid; constructing a digital twinborn simulation environment of the glyceryl triacetate production process; defining a reinforcement learning framework by taking a digital twin simulation environment as a scene; according to the reinforcement learning framework, taking the Elman neural network as a state predictor, and predicting the state of the glyceryl triacetate; solving the reinforcement learning framework through an MO-MPO algorithm, and determining an optimal control strategy and an optimal production parameter sequence corresponding to the optimal control strategy; judging whether the process capability index is smaller than a process capability index threshold value or not; if yes, continuing to solve the reinforcement learning framework; otherwise, outputting an optimal production parameter sequence; and controlling the optimal production parameter sequence through a PID (Proportion Integration Differentiation) control algorithm.

The invention discloses a high-molecular-weight phosphamide aggregate flame retardant and a preparation method thereof.The method comprises the steps that phosphoryl dichloride compounds and piperazine anhydrous serve as raw materials, an amino-terminated phosphamide polymer is synthesized through a condensation reaction, and the phosphamide polymer flame retardant is obtained. The high-molecular-weight phosphamide aggregate flame retardant is obtained through a ring-opening reaction of amino-terminated groups and epoxy groups between the high-molecular-weight phosphamide aggregate flame retardant and triglycidyl isocyanurate. Compared with an existing small-molecule flame retardant, the flame retardant is higher in thermal stability, better in compatibility with a high polymer material matrix, not prone to migration and capable of achieving synergistic flame retardance due to the fact that the flame retardant contains phosphorus and nitrogen structural units at the same time, and when the prepared flame retardant is added into TPU, PC, EP, PET and other transparent matrixes, the flame retardance is improved. The flame retardant property of the transparent base material can be improved, and meanwhile, good mechanical property and high light transmittance can be kept. In addition, the preparation method disclosed by the invention is simple and easy to control, high in yield, wide in source of required raw materials, easy for industrial production and wide in industrial application prospect.

The invention relates to 3D printing silk fibroin-based conductive hydrogel as well as a preparation method and application thereof, and belongs to the technical field of hydrogel. The preparation method comprises the following steps: S1, adding silk fibroin, a graphene oxide dispersion liquid and glycidyl methacrylate into a lithium bromide solution for reaction, and performing dialysis, centrifugation and freeze drying to obtain modified silk fibroin; s2, dissolving the modified silk fibroin, polyethylene glycol diacrylate and a photoinitiator in water, and centrifuging and defoaming to obtain bio-ink; s3, preparing the bio-ink into the 3D printing silk fibroin-based conductive hydrogel through a DLP 3D printing technology. Methacrylic acid silk fibroin is used as a base material, polyethylene glycol diacrylate is used as a reinforcing material, and graphene oxide is introduced to construct the photocuring printing ink. In addition, the silk fibroin-based conductive hydrogel with excellent performance can be prepared by combining the structural design of multilevel porous and triple-period extremely small curved surfaces.

The invention discloses polysaccharide-based double-network hydrogel as well as a preparation method and application thereof. The polysaccharide-based double-network hydrogel comprises a first gel network and a second gel network interwoven with the first gel network, the first gel network is formed by crosslinking modified chitosan and modified hyaluronic acid through a Schiff base reaction, and the second gel network is formed by crosslinking modified chitosan and modified hyaluronic acid through a photopolymerization reaction; wherein the modified chitosan is chitosan modified by glycidyl methacrylate or chitosan which is coupled with a cartilage regeneration promoting substance and is modified by glycidyl methacrylate, and the modified hyaluronic acid is formylated hyaluronic acid modified by methacrylic anhydride. The hydrogel prepared by the invention has controllable aperture, proper swelling property and long-term stable drug sustained release effect, can effectively maintain the activity of mesenchymal stem cells, has good in-vivo biocompatibility, and can significantly promote cartilage regeneration.

The invention relates to the technical field of films, in particular to a high-surface tension aluminized base film and a preparation method thereof. The method comprises the following steps: grafting modified fumed silica with a silane coupling agent KH-570, and grafting a ternary polymerization shell layer composed of 2-acrylamide-2-methylpropanesulfonic acid, lauryl methacrylate and glycidyl methacrylate on the surface of the modified fumed silica to obtain organic anti-sticking silica; secondly, synthesizing an aromatic sulfonated polyester prepolymer, loading nano titanium dioxide, and carrying out melt blending extrusion with polypropylene to form polar cluster polypropylene master batches; and finally, blending polypropylene resin, the master batch and maleic anhydride grafted polypropylene, and carrying out melt extrusion, air cooling and slow cooling and two-way stretching molding. The obtained base film is high in surface tension, high in aluminized layer adhesive force, excellent in oxygen and water vapor barrier property, good in thermal stability and suitable for the field of high-end packaging.