643 results about "Epoxide" patented technology

The invention relates to an isoterpinene 4, 8-epoxide synthesis method, which comprises: blending an isoterpinene raw material, a catalyst, a catalyst auxiliary agent and a solvent, stirring to form a mixture solution, carrying out a mixing reaction on the mixture solution and an oxidizing agent in a reactor, purifying, and drying to obtain the isoterpinene 4, 8-epoxide. And 2, 8-epoxide. According to the synthesis method of the isoterpinene 4, 8-epoxide, an adopted reaction system is moderate in oxidability and mild in reaction condition, double bonds at the fourth position can be directionally oxidized, high oxidation selectivity is achieved, and finally the highest selectivity of the isoterpinene 4, 8-epoxide can reach 95% or above; meanwhile, the method overcomes the defect that the existence of water in a catalytic system in the prior art easily causes ring-opening hydrolysis of epoxidation reaction, accelerates the epoxidation reaction process, shortens the reaction time, and increases the yield of the product, and the highest yield can reach 88% or above.

The invention relates to a bis-polyisobutylene alcohol amine compound and compositions thereof. The invention also is directed to a new process for making the bis-polyisobutylene alcohol amine by reacting a polyisobutylene epoxide with a polyamine, optionally in the presence of a catalyst, a protic solvent initiator and / or a diluent. In addition, the invention further relates to the many uses of the bis-polyisobutylene alcohol amine including but not limited to its use in lubricants, surfactants, emulsifiers, resins, and the like.

A method of fixating carbon dioxide to a substituted cyclic carbonate includes a reaction of an epoxide and carbon dioxide in the presence of a zirconium-containing metal-organic framework to form the substituted cyclic carbonate. The zirconium-containing metal-organic framework is a UiO-66-based metal-organic framework including an aminomethylbenzoic acid. The zirconium-containing metal-organic framework catalyzes the formation of the substituted cyclic carbonate in a range of 40 to 97 percent yield.

A polyester copolymerized polycarbonate belongs to the technical field of polycarbonate materials, and has the following structure: a molecular chain is a randomly distributed multi-block structure of a polycarbonate segment and a polyester segment, the polycarbonate segment is a polymerized chain segment of an epoxy compound, carbon dioxide and any cyclic anhydride, and the polyester segment comprises one or more of PCL, PGA, PBAT, PHA and PBS. The material integrates the advantages of polycarbonate and various polyesters, the variety and proportion of polyester segments can be adjusted according to different application requirements, performance customization is achieved, and the material has good biocompatibility, degradability, weather resistance and mechanical property.

The invention discloses preparation and application of an imido covalent organic framework material containing imidazolyl ionic liquid. The imido covalent organic framework material (ILs-TPN-COFs) containing the imidazolyl ionic liquid is obtained by connecting the imidazolyl ionic liquid [CnCmILs (at) Br] to an imido covalent organic framework TPN-COFs through a covalent bond. The material has an ionic liquid tertiary amine N active site and a halogen anion active site, and can promote CO2 activation and ring opening of epoxide. The ILs-TPN-COFs catalytic material has the advantages of uniform distribution of active sites, better stability, easiness in separation of the catalyst from a reaction system, better repeatability and the like. According to the invention, the prepared novel ILs-TPN-COFs material is applied to catalysis of synthesis of propylene carbonate from carbon dioxide and epoxypropane, and shows excellent catalytic performance under mild reaction conditions.

The invention discloses a far-infrared high-transmittance composite material, a preparation method thereof and an optical device, and the far-infrared high-transmittance composite material comprises the following components in parts by weight: 70-99 parts of a polymer matrix; 1-30 parts of an anti-reflection auxiliary agent; the polymer matrix is a sulfur-containing polymer prepared by polymerization reaction of a polymeric monomer and sulfur, and the proportion of carbon-carbon unsaturated bonds is less than 3%; the polymeric monomer is selected from at least one of a vinyl monomer, a propenyl monomer, an acrylic acid monomer, a methacrylic acid monomer, an epoxide monomer, a thiopropyl ring monomer, an alkynyl monomer, a butadiene monomer, an isoprene monomer and a norbornene monomer; the anti-reflection auxiliary agent comprises at least one of nano zinc sulfide, nano zinc selenide, nano calcium fluoride, nano magnesium fluoride and nano magnesium oxide. The composite material and the optical device thereof have high far infrared transmittance and good mechanical properties and processability, and can meet the requirements of various far infrared optical fields.

The invention belongs to the technical field of lithium ion batteries, and discloses a polycarbonate copolymer solid electrolyte with a sulfur-containing main chain and a preparation method thereof. The polycarbonate copolymer with the sulfur-containing main chain is obtained by catalyzing polymerization of carbon dioxide, epoxide and episulfide by using a cheap, easily available, simple and efficient nonmetal Lewis acid and an organic amine / organic ammonium salt / organic phosphorus bi-component catalytic system, and the copolymer has excellent mechanical properties, thermal stability and chemical stability. Uniformly mixing the copolymer, a lithium salt and a plasticizer in a solvent to obtain an electrolyte solution; and preparing a membrane from the electrolyte solution on a porous support material, and carrying out vacuum drying to obtain the solid electrolyte. The room-temperature ionic conductivity of the solid electrolyte is 3.4 * 10 <-7 >-7.2 * 10 <-4 > S / cm, and the solid electrolyte has an electrochemical oxidation window of 4.5 V-5. 5V. The solid electrolyte shows excellent cycle performance and interface stability when being used for the lithium ion battery, and can effectively inhibit the growth of negative electrode lithium dendrites.

The invention belongs to the technical field of chemical engineering and medicines, and particularly relates to polyether polyol of high-molecular-weight sucrose and a synthesis method of the polyether polyol. The average molecular weight of the sucrose polyether polyol is 5000-10000, adding an initiator, namely a mixture consisting of sucrose, small molecular alcohol and water, and an alkali metal catalyst into a reactor, heating, and introducing epoxide to carry out polymerization reaction; preserving heat, curing, heating and dehydrating; introducing epoxide for polymerization reaction, and adding water and an adsorbent for refining to obtain a refined polyether polyol stub bar; the preparation method comprises the following steps: adding a refined polyether polyol material head, DMC and an acidic material into a container, heating for dehydration, introducing epoxide for polymerization reaction, and adding water and an adsorbent for refining to obtain the polyether polyol of high molecular weight cane sugar. The sucrose polyether with the ultra-high molecular weight can be synthesized, is narrow in molecular weight distribution, high in functionality and stable in storage, and is applied to the fields of semi-rigid foam polyurethane, polyurethane elastomers and the like, or applied to micromolecule inclusion, recognition and slow release in the fields of medicines and foods.

The invention discloses a method for catalyzing the alternating copolymerization reaction of epoxide and cyclic anhydride, which utilizes a composite dicarboxylic acid zinc catalyst to catalyze the alternating copolymerization reaction of epoxide and cyclic anhydride, and comprises the following components in molar ratio: a) a zinc compound; and b) the ratio of the metal hydrogen compound is 1: (0.1-12). The zinc compound is a compound with a general formula of Zn-R (COO) 2, wherein R is C1-C8 alkyl; the metal hydrogen compound is a compound with a general formula of XHY, X is Li, Na, Mg, K, Ca, Be, Sr, Ba, Ra, Fr, Rb or Cs, and Y is 1, 2 or 3. The composite catalyst prepared by the invention is simple in preparation method, is applied to catalysis of alternate copolymerization of epoxide and cyclic anhydride, and has the characteristics of high catalytic activity and low polyether content.

The invention discloses a polyester-carbon dioxide based polycarbonate-polyester triblock biodegradable elastomer and a preparation method of the polyester-carbon dioxide based polycarbonate-polyester triblock biodegradable elastomer. The polyester-carbon dioxide based polycarbonate-polyester copolymer with a triblock structure is obtained by initiating and catalyzing epoxide, carbon dioxide and high-activity tetrachlorophthalic anhydride to be copolymerized through a metal catalyst or Lewis acid-base pair. The polycarbonate chain segment formed by the long-chain branch epoxide 1 and carbon dioxide has a low glass transition temperature (Tg1lt; -20 DEG C); and a polyester chain segment formed by tetrachlorophthalic anhydride and short-chain branch epoxide has a high glass transition temperature (Tg2 is greater than or equal to 100 DEG C), so that the triblock copolymer has two obvious glass transition temperatures, and has the thermoplastic processability of plastic and the high elasticity of rubber due to the unique microphase separation structure.

The invention relates to a polyion liquid-porous carbon composite material, preparation thereof and application of the polyion liquid-porous carbon composite material in catalyzing conversion of low-concentration carbon dioxide. According to the preparation method, a novel Lewis acid-base active site and nucleophilic group co-modified polyion liquid-porous carbon composite material is prepared by combining pyrolysis of a liquid organic precursor with an in-situ polymerization strategy; the material is used as a catalyst, epoxide and low-concentration carbon dioxide are used as reactants, and high-selectivity synthesis of the cyclic carbonate is realized under the conditions that the dosage of the catalyst is 4%-8% of the mass percent of the epoxide, the reaction pressure is 0.5-2.5 MPa, the reaction temperature is 70-110 DEG C and the reaction time is 8-16 hours. The catalyst is easy to separate after the reaction is finished, and the catalyst is excellent in recycling performance. The method using the composite material provided by the invention as the catalyst for the cycloaddition reaction of carbon dioxide and epoxide overcomes the defects of low activity, poor stability, difficulty in recycling and the like of the currently reported catalyst, and has good industrial application potential.

The invention relates to a method for bonding a layer of elastomeric material (CE) to an aluminum substrate (SM), characterised in that it comprises the following steps: a) treating the surface (S) of the aluminum substrate (SM) in order to roughen it; b) treating the surface (S) by means of argon plasma; c) exposing said surface (S) to a plasma in the presence of a gaseous chemical precursor selected from the group consisting of epoxides, acrylics, olefins, alkynes and imides, until a deposit of chemical substances having a thickness of 5 nm to 110 nm is obtained; d) bringing the layer of elastomeric material (CE) into contact with the surface (S) of the aluminum substrate (SM); e) vulcanizing the layer of elastomeric material, said step c) being carried out at a low pressure, i.e. At a pressure of 10-2 mbar to 10-5 mbar.

The invention relates to a method for synthesizing an isoterpinen-4, 8 epoxide. Specifically, the invention provides the preparation method of the isoterpinen-4, 8-epoxide, and the method comprises the following steps: (1) mixing isoterpinene with an organic solvent to obtain a solution A; (2) mixing hydrogen peroxide with EDTA-2Na (Ethylene Diamine Tetraacetic Acid-2Na) to obtain a solution B; and (3) mixing the solution A prepared in the step (1) and the solution B prepared in the step (2), reacting, separating the reaction liquid in an oil-water separator to obtain an oil phase, and separating to obtain the isoterpinen-4, 8-epoxide. The isoterpinene-4, 8-epoxide prepared by the preparation method of the isoterpinene-4, 8-epoxide disclosed by the invention has the advantages of excellent purity, excellent yield and excellent conversion rate.

The invention belongs to the technical field of biochemical engineering, and particularly relates to a Pickering emulsion microcapsule of interface immobilized lipase as well as a preparation method and application of the Pickering emulsion microcapsule. The preparation method of the Pickering emulsion microcapsule comprises the following steps: ultrasonically dispersing silicon oxide nanoparticles which have an emulsifying function and can adsorb enzyme into an organic solvent to serve as an oil phase, dissolving lipase into a buffer solution to serve as a water phase, mixing the water phase and the oil phase, and carrying out ultrasonic dispersion to obtain the Pickering emulsion microcapsule. And then adding a silane coupling agent, organic amine and an organic solvent, and carrying out interface gel-sol treatment to obtain the Pickering emulsion microcapsule. The Pickering emulsion microcapsule disclosed by the invention has better high temperature resistance and pressure resistance, and can realize efficient preparation of epoxide in a fixed bed continuous enzyme catalysis olefin epoxidation reaction.

The invention discloses a wear-resistant and heat-insulating hard foam material and a preparation method thereof. The preparation method comprises the following steps: treating cellulose through a deep eutectic solvent to convert the cellulose into nano fibril; freeze-drying by adopting an ice template method to obtain a nanocellulose aggregate with a layered structure; then, growing ZIF-8 nanocrystals on the surface of the nanocellulose aggregate, and obtaining CNF-A (at) ZIF-8; separating the CNF-A-coated ZIF-8 from the liquid phase through filtering and washing treatment, and coating the surface of the CNF-A-coated ZIF-8 with polydopamine in a Tris buffer solution so as to obtain CNF-A-coated ZIF-8 / PDA; further dispersing CNF-A ZIF-8 / PDA in water to obtain dispersion slurry, adding a polyvinyl alcohol aqueous solution and epichlorohydrin into the slurry, and stirring and mixing to obtain a CZPP precursor; performing freezing treatment on the CZPP precursor; and finally, carrying out freeze drying treatment to obtain the CZPP rigid foam. The CZPP prepared by the invention has the characteristics of excellent mechanical strength, good heat insulation performance, wear resistance and light weight, and the main body raw materials CNF and PVA are degradable materials, so that the CZPP has the characteristic of environmental protection.

Methods and systems for the electrochemical epoxidation of alkenes to generate an epoxide are described herein. Said methods and systems comprise: contacting an anode comprising an oxygen atom transfer electrocatalyst with an alkene in the presence of an electrolyte comprising water; applying a voltage to the anode and a cathode to generate the epoxide; wherein the oxygen atom transfer electrocatalyst comprises an at least partially oxidized palladium-platinum alloy characterized by the formula FX1: PdyPtzOx; wherein y is greater than 0 and less than 1; z is greater than 0 and less than 1; wherein the sum of y and z is equal to 1; and x is selected from the range of 0 to 2. The methods and systems disclosed herein comprise a significant advancement in the electrocatalytic epoxidation of alkenes in aqueous and mixed electrolytes using water as the oxygen atom transfer source.

The present invention discloses a metal porphyrin-based porous ionic polymer and a preparation method and application thereof, and relates to the technical field of polymer compound catalysis. The metal porphyrin-based porous ionic polymer of the present invention is provided with a three-dimensional structure by introducing tetraphenylmethane and its derivatives or halogen-containing phosphonium salts, thereby obtaining a metal porphyrin-based porous ionic polymer rich in mesopores and having a high specific surface area, thereby improving the catalytic performance and achieving efficient and highly selective catalytic reactions. The metal porphyrin-based porous ionic polymer prepared by the present invention is particularly suitable for catalyzing the cycloaddition reaction of carbon dioxide and epoxide, has high selectivity and strong adsorption capacity for carbon dioxide, and can catalyze the generation of cyclic carbonates efficiently and selectively.

A process for preparing alkoxylated ether amines including performing an alkoxylation reaction between a Guerbet alcohol and an epoxide in the presence of a catalyst to obtain an alkoxylated alcohol. Performing an amination reaction on the alkoxylated alcohol in the presence of ammonia and hydrogen to form an alkoxylated Guerbet amine.

Disclosed herein are the multiple charged cationic or anionic compounds, methods of making thereof, and articles or compositions comprising thereof. The disclosed multiple charged cationic or anionic compounds are derived from polyamines through two reactions: an aza-Michael addition with an activated olefin having an ionic group and a ring-opening reaction with an epoxide.

The invention discloses a preparation method and application of a zinc gallate catalyst for synthesizing carbon dioxide-based polycarbonate, and belongs to the technical field of catalysts.The zinc gallate catalyst is prepared through the steps that zinc salt and gallic acid (3, 4, 5-trihydroxybenzoic acid) are subjected to a reaction, low-carbon-number alcohol serves as a complexing agent, and a reaction solution is obtained; the copolymer can be applied to ring-opening copolymerization of carbon dioxide and epoxide, and a third monomer even a fourth monomer can be added on the basis to carry out ternary copolymerization and quaternary copolymerization to generate aliphatic polycarbonate with a multi-element structure. The activity of the zinc gallate catalyst for catalyzing ring-opening copolymerization of carbon dioxide and epoxypropane is larger than 900 g polymer / g catalyst, the content of carbonate units is larger than 96%, the selectivity is larger than 91%, the balance of the activity and the content of the carbonate units can be met, the synthesis process is simple, the reactant cost is low, and the zinc gallate catalyst is very suitable for industrial production of carbon dioxide-based polycarbonate.

The invention relates to the technical field of nano-material preparation, and discloses a method for preparing spherical nano-silver powder under epoxide induction and nano-silver powder, and the method comprises the following steps: preparing a silver source solution, dropwise adding epoxide into the silver source solution under the stirring condition to obtain a mixed solution, preparing a reducing agent solution, and preparing the spherical nano-silver powder under the induction of epoxide. The reducing agent solution and the mixed solution are mixed and then stirred for 30 min at the room temperature, the stirring rotating speed is 200-600 rpm, then heating reaction treatment is conducted, a reaction product is obtained, and spherical nano silver powder is obtained after the reaction product is centrifuged, washed and dried; in the preparation process, a dispersion protective agent is not added, the epoxide is used as an inducer, the carbohydrates are used as a reducing agent, and the spherical nano silver powder uniform in particle size and morphology is prepared by controlling the concentration, the reaction temperature and the reaction time of the reaction substances.

An improved polyurea and chitosan core-shell delivery particle that encapsulates a benefit agent is described. Chitosan is pre-modified with a modifying compound, which is cationic, anionic or nonionic. Alternatively, modification is completed in situ. The modifying compound is selected from the group consisting of epoxides, aldehydes or alpha, beta-unsaturated compounds and reacts with the free amine moiety of the chitosan, covalently bound to the amine moiety of the chitosan via a CN bond. The modifying compound may contain an acidic group, a hydroxyl group, and a quaternary ammonium group. The reaction product of chitosan, a modifying compound, and an electrophile, preferably a polyisocyanate, produces microcapsules that have charge, improved release properties, improved compatibility, or enhanced degradation properties (e.g., in OECD Test Method 301B).

The invention discloses a terminal structure of a super junction device. A protection epoxy film covers the surface of the super junction structure of a transition region and a terminal region. Each P-type column has a first surface region, and a portion of P-type impurities in the first surface region are thermally segregated into the protective epoxy film. The second P-type injection impurity is located in a second surface region of the super junction structure of the terminal region, the second surface region and the first surface region have an overlapping region, and the second P-type injection impurity is used for compensating the reduction amount of the P-type impurity in the first surface region, so that the PN balance of the super junction structure in the terminal region is improved; and the second P-type injection impurity enables the N-type net doping amount of the second surface area of the N-type column of the terminal area to be reduced at the same time. The invention further discloses a manufacturing method of the terminal structure of the super junction device. The PN balance of the terminal structure can be improved, the withstand voltage of the device can be improved, the process window of the P-type column of the device can be expanded, and the breakdown voltage consistency and reliability of the device can be improved.

A method of carbon dioxide fixation includes contacting a covalent organic framework material with a co-catalyst and an epoxide in the presence of carbon dioxide to form a cyclic carbonate. The covalent organic framework material includes reacted units of a 2,4,6-trimethyl-1,3,5-triazine, reacted units of a 4,4′-biphenyldicarbaldehyde, and palladium nanoparticles. The reacted units of the 2,4,6-trimethyl-1,3,5-triazine and the reacted units of the 4,4′-biphenyldicarbaldehyde form a COF-701, where the palladium nanoparticles are on an outer surface of the COF-701. The co-catalyst is n-tetrabutylammonium bromide.

Articles, such as adhesive articles, electronic articles, and abrasive articles, including compositions disposed on a substrate are described. The composition comprises i) a cyclic olefin; ii) a ring-opening metathesis polymerization catalyst; iii) a second polymerizable material; and iv) 10 an initiator for the second polymerizable material. The second polymerizable material is selected from the group consisting of: a) an epoxide-containing component; and b) a (meth) acrylate monomer. The (meth) acrylate monomer contains an alicyclic or heteroalicyclic group. The composition comprises greater than 25% by weight of i) and greater than 25% by weight of at least one of a) or b), based on the total of i) and iii). The cyclic olefin and / or the second polymerizable 15 material is at least partially cured. Compositions and methods are also described.

The invention relates to preparation and low-temperature recovery methods of ester group-containing functionality-controllable epoxy resin and a composite material thereof. The method comprises the following steps: carrying out click chemical reaction on a thiol compound and carbon-carbon double bond-containing epoxide in a solvent under the initiation of 365nm ultraviolet light at the reaction temperature of 0-20 DEG C for 0.25-6 hours, and drying the solution by distillation to obtain the ester group-containing functionality-controllable epoxy resin, the molar ratio of sulfydryl to carbon-carbon double bonds in the thiol compound is 1: 1. According to the invention, an ester group-containing structure is introduced through click chemistry, and the controllability of the functionality degree of the epoxy resin is realized, so that the crosslinking density of a cured product is accurately regulated and controlled. The design not only endows a cured product with an excellent toughening effect, higher glass transition temperature and remarkably improved mechanical properties, but also endows the cured product with green and efficient degradation properties.

The invention discloses a Schiff base catalyst for copolymerization of epoxide and carbon disulfide, and relates to the technical field of Schiff base catalysts. The invention provides a structural general formula of the Schiff base catalyst and a specific structural formula in 6, and also provides a preparation method of the Schiff base catalyst. Different numbers of methyl, fluorine and other functional groups are introduced to improve the selectivity of the catalyst to the reaction.

The present invention provides a halogen-free MXene represented by the following formula (1), that has no halogen in its surface functional group by performing an etching process to generate MXene from a MAX Phase material, and after the etching process, performing an impurity removal treatment process of etching and removing impurities using a halogen-free etchant and a halogen-free post-treatment agent, respectively.Mn+1XnTx  [Formula 1]wherein, M is a transition metal element selected from the group consisting of Sc, Ti, V, Cr, Mn, Y, Zr, Nb, Mo, Hf, and Ta, X is at least one of carbon and nitrogen, and n is an integer from 1 to 4, and Tx is a functional group selected from the group consisting of oxygen, alkoxide of 1 to 5 carbon atoms, alkyl, carboxylate, hydroxide, hydride, oxide, sub-oxide, nitride, sub-nitride, sulfide, sulfonate, thiol, and epoxide.

The invention discloses amine polyether polyol as well as a preparation method and application thereof, and belongs to the technical field of polyol. According to the technical scheme, the amine polyether polyol comprises an amine initiator, a catalyst, an epoxide and an adsorbent, and the synthesis method comprises the following steps: 1) adding the amine initiator and the catalyst into a reactor, introducing inert gas into a material for replacement, adding the epoxide into the mixture, and carrying out anionic polymerization reaction; (2) carrying out heat preservation and curing reaction at 80-150 DEG C for 3-6 hours, and after the reaction is completed, heating and degassing at 90-110 DEG C to obtain a polyether polyol crude product; and 3) adsorbing the polyether polyol crude product with an adsorbent, heating for dehydration, and filtering to obtain the amine polyether polyol finished product. The amine polyether polyol synthesized by the method disclosed by the invention is high in functionality, the synthesis process conditions are easy to control, and the product is high in reaction activity and catalytic activity and stable in storage, and can be used as a cross-linking agent and a catalyst.

The invention belongs to the field of electrolyte, and particularly relates to cyclic carbonate for electrolyte and a preparation method thereof and electrolyte, and the preparation method of the cyclic carbonate for electrolyte comprises the following steps: adding a porous carbon nanomaterial as a catalyst and epoxide into a reaction kettle, and introducing CO2 for reaction to obtain the cyclic carbonate. The metal oxide modified nitrogen-doped porous carbon nanomaterial with a high specific surface area is designed and developed to catalyze CO2 and epoxide to synthesize the cyclic carbonate for the electrolyte, the cyclic carbonate for the electrolyte is prepared by catalyzing carbon dioxide under a mild condition, and on the basis of ensuring the high content of the cyclic carbonate, the epoxypropane conversion rate is 99.9%; the reaction time is shortened, the purity of the obtained cyclic carbonate product is 99.9%, and the method is suitable for industrial production.