738 results about "Succinic anhydride" patented technology

The invention relates to the field of membrane materials, and discloses an epoxy modified starch-based degradable membrane and a preparation method thereof, the epoxy modified starch-based degradable membrane comprises epoxidized starch, modified nanocellulose and a plasticizer; the modified nano cellulose is prepared by mixing a modified composite filler, a nano cellulose dispersion liquid and a zinc acetate dihydrate aqueous solution; the nano-cellulose dispersion liquid is prepared by adhering polytannic acid formed by oxidation and self-polymerization of tannic acid to the surface of nano-cellulose; the modified composite filler is prepared by performing carboxylation modification on nano titanium dioxide coated fumed silica nanoparticles by using succinic anhydride and gamma-aminopropyltriethoxysilane, then reacting with polyethyleneimine to obtain an aminated composite filler, and finally grafting glycidyl dodecyl dimethyl ammonium chloride to the surface of the aminated composite filler. The prepared film material is high in tensile strength, has certain hydrophobicity, and has good heat resistance, antibacterial property and flame retardant property.

The invention discloses a nano blocking agent for drilling fluid and a preparation method thereof, and belongs to the technical field of blocking agents, the nano blocking agent for drilling fluid is prepared by reaction of a core layer blocking agent and a shell layer blocking agent, the core layer blocking agent is prepared by reacting nano silicon dioxide, gamma-methacryloxypropyltrimethoxysilane and a first part of vinylphosphonic acid, and has secondary blocking capability; and the shell blocking agent is prepared by reacting a second part of vinyl phosphonic acid, styrene and 2-dodecene-1-yl succinic anhydride, and has the characteristic of flexibility. The nano plugging agent has rigid supporting and flexible deformation capabilities, and the high-temperature stability and compressive strength of a plugging layer are remarkably improved. The chemical binding force of the plugging agent and the rock is enhanced; the hydrolysable methoxyl reserved in the core layer provides a secondary plugging function, and the plugging validity period is prolonged. The invention relates to a preparation method of a nano blocking agent for drilling fluid, which is used for preparing the nano blocking agent for drilling fluid.

The invention discloses a bamboo powder-containing biodegradable plastic for food contact and a preparation method thereof, and relates to the technical field of bio-based materials. The bamboo powder-containing biodegradable plastic for food contact comprises chitosan starch and modified bamboo powder, the chitosan starch is prepared by adding composite chitosan and amino-terminated polyethylene glycol into oxidized corn starch, and the composite chitosan is prepared by grafting chlorogenic acid on the surface of chitosan and then coating succinic anhydride derivatives. The succinic anhydride derivative is prepared from dodecenyl succinic anhydride and 1, 4-butanediamine through a reaction, so that the plastic has the antibacterial property, and meanwhile, the mechanical property is enhanced; the modified bamboo powder is prepared by reacting bamboo powder with a carboxyl-terminated composition, and the carboxyl-terminated composition comprises carboxyl-terminated polylactic acid and carboxyl-terminated polyamide. The toughness of the plastic is enhanced, and the mechanical property of the plastic is further enhanced.

The invention discloses a carbon fiber surface treatment process, which belongs to the technical field of organic synthesis, and comprises the following steps: S1, taking melamine, adding into tetrahydrofuran, adding carboxylated carbon fiber and a condensing agent, heating to 50-60 DEG C, stirring for 3-4 hours, washing, and drying to obtain melamine modified carbon fiber; s2, adding nano silicon dioxide into DMF (Dimethyl Formamide), performing ultrasonic treatment, adding a silane coupling agent KH550 and succinic anhydride, stirring for 3-5 hours, washing and drying to obtain modified silicon dioxide; and S3, adding the modified silicon dioxide into DMF, adding the melamine modified carbon fiber and a condensing agent, heating to 90-100 DEG C, stirring for 4-5 hours, washing, and drying to obtain the surface-treated carbon fiber. The silane coupling agent KH550 and butanedioic anhydride are used for carboxylation modification of nano silicon dioxide, melamine is used as a coupling agent, nano silicon dioxide is grafted on carbon fibers, surface defects on the surfaces of the carbon fibers can be filled, and therefore the mechanical performance of the carbon fibers is improved.

The invention discloses an environment-friendly antibacterial high-barrier retort pouch and a preparation method thereof, belongs to the technical field of packaging materials, and aims to solve the problem that the antibacterial property and barrier property of the retort pouch need to be further improved. The environment-friendly antibacterial high-barrier retort pouch is obtained by laminating, curing and cutting a PET (Polyethylene Terephthalate) film, a nylon film and a modified polypropylene film through an adhesive; the preparation method of the modified polypropylene film comprises the following steps: reacting 10-hydroxycapraldehyde with amino modified titanium dioxide to obtain modified titanium dioxide; reacting allyl succinic anhydride with the modified titanium dioxide to obtain allyl succinic anhydride grafted modified titanium dioxide; carrying out melt blending on the intermediate I, polyethylene and a compatilizer to obtain a melt, and carrying out extrusion, tape casting, trimming and rolling to obtain a modified polypropylene film; the environment-friendly antibacterial high-barrier retort pouch prepared by the preparation method disclosed by the invention not only has antibacterial property and barrier property, but also has good high-temperature resistance.

The present application relates to the technical field of aluminum electrolytic capacitors, and specifically discloses a low-temperature, medium- and high-voltage aluminum electrolytic capacitor. Among them, the electrolyte of the low-temperature, medium- and high-voltage aluminum electrolytic capacitor includes the following raw materials: a main solvent, a low-melting point co-solvent, a main solute, an auxiliary solute, a flash voltage enhancer, a hydrogen remover, and a waterproofing auxiliary agent. Among them, the flash voltage enhancer is modified nano-silica. The present invention uses a vinyl silane coupling agent to modify the surface of nano-silica, and then esterifies polyvinyl alcohol and allyl succinic anhydride to form allyl succinic anhydride-grafted polyvinyl alcohol, and effectively combines it with silanized nano-silica, so that the nano-silica particles can be evenly dispersed in the electrolyte to increase the flash voltage of the electrolyte, and by introducing a low-melting point co-solvent, the melting point of the electrolyte system can be effectively reduced, so that the capacitor can maintain low viscosity and good electrical properties in a low-temperature environment.

The invention relates to preparation of high-stability mascarpone cheese and application of the mascarpone cheese in baking, and belongs to the technical field of cheese preparation. The glutamine transaminase is combined with a citric acid-sodium citrate system, so that the excessive denaturation of protein is reduced, and the texture and flavor of the cheese are improved. Trehalose and xanthan gum are added for locking water and resisting freezing, and an antioxidant is combined for use, so that the freeze-thaw stability and oxidation resistance of the cheese are improved, the cheese is protected from texture change and oxidative damage in the freezing and unfreezing processes, and excellent texture and flavor can still be kept after multiple times of circulation. Arabic gum is modified through octenyl succinic anhydride, amphipathy is obtained, whey separation is prevented, whey loss is reduced, and the cheese taste is improved.

The invention provides a coated paper for packaging and a preparation method thereof. The coated paper comprises the following raw material components: 20-25 parts of modified corn starch citrate, 75-80 parts of alginic acid, 20-25 parts of polypropylene carbonate, 20-25 parts of polylactic acid, 1-3 parts of glycerol, 1-3 parts of polyhydroxystearic acid and 2-2.5 parts of carboxymethyl cellulose. The preparation method of the modified corn starch citrate comprises the following steps: in a reaction kettle, preparing a citric acid solution with a mass percentage of 0.8-1.2% by using distilled water, and heating the solution to 35-38 DEG C; starting stirring; adding corn starch to the citric acid solution while stirring, and reacting for 2.5-3 hours; then, adjusting the pH value of the solution in the reaction kettle to be alkaline with sodium hydroxide, cooling the solution to 26-28 DEG C, adding octenyl succinic anhydride and sodium alginate, and continuing stirring and reacting for 30-50 minutes; after the reaction, standing and filtering; drying and grinding the filtered solid to 80-100 meshes. The coated paper prepared by the invention is environmentally friendly, safe and easily degradable.

The invention discloses a high-breathability fabric and a preparation method thereof, and relates to the field of fabrics. When the high-breathability fabric is prepared, cotton cellulose sequentially reacts with allyl succinic anhydride and 4 '-amino-2, 2': 6 ', 2'-terpyridyl to obtain modified cellulose; the preparation method comprises the following steps: sequentially reacting graphene oxide with thionyl chloride, 2, 4-diamino-6-vinyl-S-triazine and 2, 6-di-tert-butyl-4-bromomethylphenol, so as to obtain modified graphene oxide; uniformly mixing the modified cellulose, the modified graphene oxide, hydrogen-containing silicone oil, polyethylene glycol and silver nitrate, and spinning and weaving to obtain the high-breathability fabric. The high-breathability fabric prepared by the invention has excellent moisture absorption and breathability, lasting antibacterial property, mechanical property and photo-oxidative aging resistance.

The invention relates to a medicine for repairing skin wounds and a preparation method thereof, and belongs to the technical field of biological medicines.The medicine is prepared from, by mass, 25-30 parts of bee embryo peptide, 8-10 parts of alkannin derivative, 10-15 parts of armillaria mellea polysaccharide, 8-10 parts of inonotus obliquus polysaccharide, 6-8 parts of notoginsenoside and 5-7 parts of astragaloside. The bee fetus peptide is a product which is more than 500Da and is obtained by performing step-by-step enzymolysis on bee larva freeze-dried powder through trypsin and bacillus subtilis neutral protease to obtain enzymatic hydrolysate which is less than 3kDa, performing purification through a G-50 sephadex column, performing ultrafiltration and performing freeze-drying. The alkannin derivative is obtained by reacting alkannin with succinic anhydride and glucosamine-polyethylene glycol. A special method is adopted for preparing the bee embryo peptide and alkannin derivatives, the bee embryo peptide and alkannin derivatives are matched with other components to play a synergistic role, and the effects of high safety, high skin cell proliferation promoting capacity, excellent antibacterial performance and the like are achieved.

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 relates to epsilon-polylysine epsilon-PL-loaded modified rice bran protein antibacterial nanoparticles as well as a preparation method and application thereof, and belongs to the technical field of preparation of nanoparticles. The preparation method comprises the following steps: extracting rice bran protein from defatted rice bran to prepare a rice bran protein stock solution; under continuous stirring, adding succinic anhydride into the rice bran protein stock solution to obtain acylated rice bran protein; mixing the acylated rice bran protein stock solution, the lactose stock solution and the epsilon-PL stock solution; and centrifuging and freeze-drying to obtain the epsilon-PL-loaded modified rice bran protein antibacterial nanoparticles. The preparation method disclosed by the invention is simple and low in cost, the prepared nanoparticles have smaller particle size and turbidity and higher stability, the hygroscopicity of epsilon-PL can be reduced to a great extent, the bioavailability of epsilon-PL can be improved, and the nanoparticles have an obvious bacteriostatic effect on escherichia coli and staphylococcus aureus.

The invention relates to the technical field of oilfield chemistry, in particular to a glycosyl anionic surfactant and a preparation method and application thereof, and the glycosyl anionic surfactant is prepared from glucose, long-chain alkyl primary amine and succinic anhydride sodium hydroxide. The glycosyl anionic surfactant has excellent surface activity, is simple in preparation method, high in product yield, safe and reliable, can be used for oil displacement agents, polymer surface oil displacement agents, emulsifiers, discharge aiding agents, heavy oil viscosity reducers and the like, is wide in application, and meets the green development requirements of oil fields. The acid fracturing discharge aiding agent using the glycosyl anionic surfactant as a raw material can effectively reduce the surface and interfacial tension of an aqueous solution, and meets the technical specification of the acid fracturing discharge aiding agent.

The invention discloses a preparation method and application of a powder coating for a super-weather-resistant high-flexibility coiled material, and relates to the technical field of powder coatings. The invention discloses a preparation method of a powder coating for a super-weather-resistant high-flexibility coiled material, which comprises the following steps: mixing filler modified polyester resin, a curing agent, a defoaming agent, a flatting agent, an adhesion promoter and polytetrafluoroethylene wax according to the weight percentage of the raw materials to obtain the powder coating; the filler modified polyester resin disclosed by the invention is obtained by reacting aminated hydroxyl-terminated polyester, phosphorous acid and epoxy modified graphene oxide and then carboxylating by butanedioic anhydride; the filler modified polyester resin prepared by the invention is added into a coating as a base material of a powder coating, so that the coating is endowed with the characteristics of high weather resistance and high flexibility.

The invention relates to a preparation method and application of a polyamide surface functionalized polyvinyl alcohol fiber, and belongs to the technical field of biodegradable fibers. According to the method, polyamide is grafted to polyvinyl alcohol fibers through a two-step method. The preparation method comprises the following steps: grafting carboxyl onto the surface of the polyvinyl alcohol fiber through succinic anhydride grafting modification, and further grafting 5-aminoisophthalic acid onto the surface of the polyvinyl alcohol fiber through amidation reaction. The polyamide surface-functionalized polyvinyl alcohol fiber prepared by the method has excellent performance, and the maximum pull-out load and the corresponding pull-out strength of the polyamide surface-functionalized polyvinyl alcohol fiber in a biodegradable plastic film are obviously superior to those of unmodified polyvinyl alcohol fiber or polyvinyl alcohol fiber subjected to surface modification by using succinic anhydride alone; particularly, the maximum pull-out load and the corresponding pull-out strength of the modified fiber in the biodegradable plastic film after the modified fiber reacts at 40 DEG C for 1.5 h reach the maximum value, and the whole biodegradable plastic after fiber reinforcement still keeps the biodegradable performance. As a method for regulating and controlling the interface bonding force between the polyvinyl alcohol fiber and a biodegradable plastic matrix, the method is expected to be applied to preparation of biodegradable efficient reinforced fiber, and the application prospect of the polyvinyl alcohol fiber is improved.

The invention provides a flexible transparent polyimide film and a preparation method thereof, and relates to the technical field of high polymer materials. The polyimide film is prepared from diamine and dianhydride through a polymerization reaction. The diamine comprises a first diamine and a second diamine; the first diamine is aromatic diamine containing a rigid group; the second diamine is diamine containing imidazole; the dianhydride comprises first dianhydride and second dianhydride; the first dianhydride is selected from at least one of 3, 3, 4, 4-diphenyl sulfone tetracarboxylic dianhydride, 4, 4 '-biphenyl tetracarboxylic dianhydride and benzophenone tetracarboxylic dianhydride; and the second dianhydride is selected from 2, 2 '-(1, 4-piperazine diacyl)-succinic anhydride or 2R, 5R, 7S, 10S-naphthalene tetracarboxylic dianhydride. According to the polyimide film prepared by the method, the optical performance is remarkably improved, and meanwhile, better heat resistance and mechanical performance are obtained.

The invention belongs to the technical field of pharmacy, and particularly relates to a method for preparing a pyridazinone compound and application of the pyridazinone compound, and the method comprises the following steps: step 1, reacting a compound as shown in a formula V with a Grignard reagent to obtain a compound as shown in a formula IV; 2, reacting the compound shown in the formula IV with succinic anhydride to obtain a compound shown in a formula III; 3, reacting the compound shown in the formula III with hydrazine hydrate to obtain a compound shown in a formula II; 4, oxidizing the compound shown in the formula II to obtain a pyridazinone compound; the pyridazinone compound or the pharmaceutically acceptable salt or prodrug of the pyridazinone compound can be used for inhibiting the activity of MET protein kinase and the mutant form of the MET protein kinase, and especially can be used as a Tepotinib intermediate.

The invention provides a composite carrier supported palladium catalyst for preparing succinic anhydride through maleic anhydride hydrogenation and a preparation method and application thereof.The structural general formula of the composite carrier supported palladium catalyst is Pd-A-X-Y / (Z1 + Z2), Z1 in a composite carrier is made of a high-specific-surface-area porous material, Z2 is made of a high-thermal-conductivity compact material, and X is larger than or equal to 1 and smaller than or equal to 2. The active component is composed of metal Pd and transition metal such as Ni or precious metal such as Ru, and the auxiliary agent is composed of oxides of alkali metal, alkaline earth metal or rare earth elements and oxides of high-valence elements such as Mo. The catalyst is prepared by an impregnation method, and the composite carrier supported palladium catalyst has excellent low-temperature activity, tolerance and stability in a reaction for preparing succinic anhydride by maleic anhydride hydrogenation, can bear high maleic anhydride concentration and high liquid hourly space velocity at low temperature, low pressure and low hydrogen-anhydride ratio, and simultaneously obtains high maleic anhydride conversion rate and succinic anhydride selectivity.

The invention relates to a polymer, a color master batch composition and a corresponding polyolefin product. By designing and synthesizing an alternating copolymer of maleic anhydride and a vinyl monomer, a polar succinic anhydride chain segment and a non-polar long-carbon alkyl chain segment are alternately formed on a main chain of the alternating copolymer, so that the steric hindrance effect of the polymer and the dispersion and coating effects on the pigment are further improved. The alternating copolymer of maleic anhydride and a vinyl monomer and low-molecular-weight polyethylene wax are used as dispersing agents to be applied to the color master batch composition, the dispersing performance and the anti-aging effect on pigments can be improved, and finally prepared polyolefin products are lower in color difference, more stable in coloring performance and better in ultraviolet aging resistance. Meanwhile, a light component byproduct alpha olefin dimer generated in the alpha olefin coordination polymerization process is also utilized, the application field of the low-molecular-weight poly alpha olefin is expanded, and the economic value of the low-molecular-weight poly alpha olefin is improved.

A gasoline modifier, a preparation method therefor and a use thereof, and a clean and environmentally friendly gasoline containing same. By volume, the gasoline modifier comprises 10-30 parts of No. 3 or No. 5 white oil, 5-50 parts of a gasoline detergent synergist and 40-85 parts of isooctyl alcohol; the gasoline detergent synergist comprises a stock liquid and a diluent liquid; the stock liquid is a liquid substance formed by mixing 2-ethylhexyl phosphate and etidronic acid in a weight ratio of 1.8-3:1 and heating to perform an esterification reaction; and / or the stock liquid comprises 2-ethylhexanol, phosphite ester, 2-ethylhexyl acetate, polyisobutylene succinic anhydride and ethylhexyl phosphate; the diluent liquid is formed by mixing formaldehyde having a content greater than 99% with oligomeric water clusters in a weight ratio of 1:4-3:7; and the weight percentage of the stock solution in the gasoline detergent synergist is 0.8%-1.3% white oil. The gasoline modifier is a pure petroleum product. When added to gasoline, it can change the physical properties of the gasoline, and achieve the effects of increasing efficiency, saving fuel, removing carbon and reducing emissions.

The invention relates to the field of composite plates, and discloses a production process for producing a waste spinning composite plate by using waste clothes, the waste spinning composite plate comprises waste clothes, waste polyvinyl chloride, high density polyethylene, modified lignin, modified composite particles, an antioxidant, a heat stabilizer and a lubricant; the modified lignin is prepared by reacting DOPO with 2-octenyl succinic anhydride and then grafting with lignin; the modified composite particles are prepared by depositing mesoporous silica on the surface of aluminum hydroxide coated ammonium polyphosphate by utilizing a pore forming agent and tetraethyl orthosilicate and modifying through a fluorine-containing copolymer. Fibers in waste clothes are molten into an organic material and extruded into a plate, and the mechanical strength of the plate is improved by utilizing the strength of the fibers; in addition, due to the addition of the modified lignin and the modified composite particles, the board is endowed with excellent flame retardance, water resistance, ultraviolet yellowing resistance and mechanical properties.

The application relates to the technical field of packaging films, and discloses an antistatic plastic packaging film and a preparation process.The antistatic plastic packaging film comprises 100 parts by weight of polyethylene, 1-6 parts by weight of phenolic resin polyaniline antistatic agent and 0.2-0.3 parts by weight of an antioxidant.The dodecyl succinic anhydride esterified phenolic resin contains carboxyl groups, can be used as a protonic acid, is doped into polyaniline through an in-situ polymerization reaction, makes imine nitrogen atoms of the polyaniline protonate, forms a charged excited state polaron, and thus the conductivity of the polyaniline is improved, the resistance of the polyethylene is reduced, and the antistatic performance of the packaging film is improved.The dodecyl succinic anhydride esterified phenolic resin and the doped polyaniline have good compatibility with the polyethylene, have a certain reinforcing effect on the polyethylene, and make the film material have higher tensile strength and elongation at break.

The invention provides hyperbranched polyhydroxy polyester resin as well as a preparation method and application thereof in preparation of an acrylic resin coating, and relates to the technical field of polymer coating compositions. According to the hyperbranched polyhydroxy polyester resin, pentaerythritol is adopted as a core, succinic anhydride, tetramethyl cyclobutanediol and trimellitic anhydride are sequentially connected to a hyperbranched molecular structure in a comonomer form through a continuous esterification reaction method, and the hyperbranched polyhydroxy polyester resin is prepared. In the preparation process of the hyperbranched polyhydroxy polyester resin, the reaction process can be controlled only through an acid value, meanwhile, polyester with a hyperbranched structure is synthesized by adopting a one-pot method, and the hyperbranched polyhydroxy polyester resin has the technical advantages that the synthetic resin step is simple, and a separation process is not needed. The hyperbranched polyhydroxy polyester resin can be widely applied to the preparation process of an acrylic resin coating.

The application discloses a salt-tolerant modified cationic starch-based flocculant and a preparation method and application of the flocculant in flocculation and recovery of microalgae, and belongs to the technical field of flocculation materials. The preparation method comprises the following steps: (1) mixing and stirring an alkali solution and starch, then adding a modifier solution of dodecyl succinic anhydride (DDSA), mixing and reacting, and finally washing and drying to obtain modified starch; and (2) mixing and stirring an alkali solution and the modified starch obtained in the step (1), then adding glycidyltrimethylammonium chloride (GTA), mixing and reacting, and finally washing and drying to obtain the product. The starch is modified by GTA and DDSA to be cationic and hydrophobic, and a salt-tolerant modified cationic starch-based flocculant is successfully prepared. The flocculant has good salt tolerance in microalgae flocculation and recovery, and can still achieve a recovery rate of more than 80% under high salinity, and the flocculant has excellent economic value.

The invention relates to the technical field of corrosion inhibitors, and discloses a high-temperature acidizing corrosion inhibitor for an oil field and a preparation method and application thereof.The high-temperature acidizing corrosion inhibitor is prepared from (S)-1-amino-3-chloro-2-propanol hydrochloride, aldehyde compounds such as terephthalaldehyde, succinic anhydride, quinoline and the like through Schiff base, anhydride esterification and quaternization reaction, and the high-temperature acidizing corrosion inhibitor for the oil field is prepared. The novel high-temperature acidizing corrosion inhibitor for the oil field is prepared. The corrosion inhibitor provided by the invention contains a plurality of betaine groups, and can form strong interaction such as coordination and complexation on the steel sheet, so that the corrosion inhibitor can be well attached to the surface of the steel sheet to form a layer of stable organic micromolecule hydrophobic membrane, the contact between corrosion inhibition media such as hydrochloric acid and the surface of the steel sheet is inhibited, and an excellent corrosion inhibition effect is achieved. And the corrosion inhibitor contains a plurality of benzene rings, biphenyl, quinoline and other structures, has good thermal stability, and has good practical application in the aspects of corrosion prevention and corrosion inhibition of oilfield exploitation, oil pipes of high-temperature wells and other equipment.

The invention relates to the technical field of biological medicines, in particular to a mesenchymal stem cell preparation for treating diabetes and a preparation method thereof. The stem cell preparation is prepared from the following components: umbilical cord mesenchymal stem cells and naringin coated SiO2, and preparation raw materials of the naringin coated SiO2 are prepared from the following components in parts by weight: 10 to 15 parts of tetraethoxysilane (TEOS), 4 to 6 parts of 3-mercaptopropyl oxysilane (MPTMS), 2 to 3 parts of naringin, 0.8 to 1.2 parts of succinic anhydride and 2 to 3 parts of cysteamine hydrochloride. The prepared stem cell preparation has synergistic blood lineage of each component, and can repair pancreas islet injury and inhibit inflammatory response.

The invention belongs to the technical field of gel. The invention provides high-strength starch sodium octenylsuccinate gel and a preparation method thereof.The preparation method comprises the steps that S1, corn and cassava starch are mixed according to the mass ratio of 1: (4.4-4.6) to obtain a mixture, and then the mixture and soft water are dispersed according to the mass ratio of 1: 1.1 to obtain starch milk; s2, adjusting the pH value of the starch milk to 9.0 by using a sodium hydroxide solution, then adding octenyl succinic anhydride at 25 DEG C, then adding sucrose ester and pectin, neutralizing the pH value to 4.5 by using an HC1 solution, and carrying out suction filtration, washing and crushing to obtain starch sodium octenyl succinate powder; and S3, gelatinizing the starch sodium octenylsuccinate powder, and storing the gelatinized starch sodium octenylsuccinate powder at low temperature to obtain the high-strength starch sodium octenylsuccinate gel. According to the invention, by reducing the ratio of corn starch to cassava starch, the viscosity of the prepared starch sodium octenylsuccinate is further improved while a lower gelatinization temperature is ensured.

The invention belongs to the technical field of medicinal materials, and particularly relates to an anti-aging and anti-leakage soft capsule wall material and a preparation method thereof. The soft capsule wall material comprises the following raw materials in percentage by mass: 10%-15% of gelatin, 0.4%-2% of succinic anhydride, 4%-6% of glycerol, 0.08%-0.13% of sodium carboxymethyl cellulose and 78%-85% of purified water. The capsule material provided by the invention can simultaneously solve the problem of slow disintegration caused by an oxidation cross-linking reaction and the problem of leakage caused by strong hygroscopicity in the storage process, is simple in production process and high in safety, and has a very good application prospect in the field of soft capsule preparations.

The invention discloses a polymer composite separator for a lead-acid storage battery and a preparation method thereof, and belongs to the technical field of separator preparation, the polymer composite separator comprises the following raw materials by weight: 40-55 parts of ultra-high molecular weight polyethylene, 0.5-1 part of an initiator, 0.5-1.5 parts of sodium allyl thioglutamate, 105-115 parts of silicon dioxide, 10-20 parts of alkyl succinic anhydride modified cyclodextrin, and 180-260 parts of filling oil; the preparation raw materials of the sodium allyl thioglutamate comprise glutamic acid and allyl isothiocyanate, the sodium allyl thioglutamate and the alkyl succinic anhydride modified cyclodextrin are introduced into the preparation raw materials of a traditional PE partition plate, and finally the prepared polymer composite partition plate for the lead-acid storage battery has high porosity and low resistivity; and the anti-oxidation performance is excellent, the puncture-resistant strength is high, and the development of the lead-acid storage battery industry towards the direction of high energy density and long cycle life is facilitated.

In various embodiments, the present invention provides a solvent free 3D printable resin comprising a linear or star-shaped poly(allyl glycidyl ether succinate) ("PAGES") copolymer, and a multi-functional thiol crosslinker, as set forth above. In one or more of these embodiments, the poly(allyl glycidyl ether succinate) ("PAGES") copolymer will be a linear copolymer formed by ring opening copolymerization of allyl glycidyl ether and succinic anhydride, initiated by a mono-or bi- functional initiating alcohol and using a 2,6-di-tert-butyl-4-methylphenoxide (Mg(BHT)2(THF)2) catalyst. These resins may also include at least one suitable photoinitiator and, optionally, a light attenuating agent or photoinhibitor. Advantageously, it has been reported that these resins have a complex viscosity that is suitable for 3D printing (from about 0.5 Pa·s to about 20.0 Pa·s) at room temperature without the need for a solvent or other diluent.