2052results about How to "The synthesis steps are simple" patented technology

The invention discloses a mesoporous Y-type zeolite molecular sieve and a preparation method thereof. The preparation method comprises the following steps of: firstly preparing a Y-type zeolite guiding agent; and then guiding synthesis of the mesoporous Y-type zeolite molecular sieve by using amphiphilic organosilane N,N-dimethyl-N-[3-(trimethoxysilane)propyl]octadecyl ammonium chloride (TPOAC) as a mesoporous template, wherein siloxane group at the organosilane terminal is firstly hydrolyzed into silicon hydroxyl; then the silicon hydroxyl is linked to a skeleton on the zeolite surface through chemical bonds; and other alkyl terminals are polymerized and then participate in pore expansion. According to the method disclosed by the invention, mesoporous zeolites can be synthesized by using a one-step hydrothermal process; the method is simple in preparation process, easy to operate and low in cost and good in connectivity between mesopores and micropores, and facilitates macromolecular diffusion. As the prepared mesoporous zeolite molecular sieve has the mesopores and the micropores, the defect of a single pore structure is avoided; and the mesoporous Y-type zeolite molecular sieve has broad application prospect in the catalytic field, in particular in macromolecular diffusion-limited reaction.

The invention discloses a spirofluorene xanthene material and a preparation method and an application method thereof, and relates to application of the material in the fields such as organic electroluminescence, photovoltaic cell, organic electrical storage, organic nonlinear optics, chemical and biological sensing, organic laser and so on. The material has the following structure. The material has the advantages that (1) the material is prepared through a one pot process and has simple steps and mild conditions; (2) the material has the advantages of spirobifluorene materials, and shows high thermal stability and vitrification temperature; and (3) the material has high hole or electron mobility and so on. An electroluminescent device prepared by utilizing the material achieves satisfactory results in aspects such as illumination, luminous efficiency, voltage withstand stability and so on.

The invention discloses a preparation method for a Beta zeolite molecular sieve with a hierarchical porous structure. Ethyl orthosilicate is used as a silicon source, sodium metaaluminate is used as an aluminum source, hexaammonio cationic quaternary ammonium surfactant is used as a template, and then the hierarchical porous zeolite molecular sieve containing meso pores and Beta zeolite micropores is prepared by using a hydro-thermal synthesis process under an alkaline condition. According to the invention, the hexaammonio cationic quaternary ammonium surfactant is used as a Beta zeolite structure guiding agent and generates micropores, aggregation of hydrophobic long-chain alkyl groups on the surfactant forms the meso pores, so the prepared Beta zeolite molecular sieve has both meso pores and the crystalline micropores. The structure with both the meso pores and the micropores enables defects of a single pore structure to be avoided and mass transfer efficiency to be improved, and the Beta zeolite molecular sieve has a wide application prospect in aspects of macro-molecular catalysis, adsorption, separation, etc.

Spiro-fluorene-xanthene bipolar main materials have vertical spiral structures, so the main materials can effectively inhibit intermolecular actions, thereby the main materials can inhibit the intermolecular actions and dimer luminescence, and have good thermal stabilities and stable amorphous states. The invention relates to a spiro-fluorene-9,9-xanthene main material having a concrete designed structure shown in the specification, and concretely relates to a preparation method of the spiro-fluorene-9,9-xanthene main material, and an application of the spiro-fluorene-9,9-xanthene main material in organic light-emitting diode devices. The material has the following advantages: 1, the material has a high thermal stability and a stable amorphous state; 2, the material has a steric hindrance effect, so the material can effectively inhibit the dimer luminescence; and 3, the preparation method and the synthetic condition of the material are simple and are easy to implement, and the luminescent efficiency of the material is high. Preliminary research results of the structures of devices of the material and the properties of the material show that the material can be used in red and green light organic electroluminescent devices. Research results show that the material has a large application value and a wide application prospect in organic light-emitting diodes as the main material.

The invention discloses a method for preparing a Silicalite-1/ZSM-5 composite molecular sieve. The method comprises the following steps of: crystallizing a mixture containing a silicon source, a ZSM-5 molecular sieve, tetrapropylammonium bromide, sodium hydroxide and water, and drying and roasting a crystallized product to obtain the core-shell structured Silicalite-1/ZSM-5 composite molecular sieve taking the ZSM-5 molecular sieve as a core and Silicalite-1 molecular sieve as a shell. In the method, cheap template agent and silicon source are adopted and the production cost if greatly reduced; and the prepared Silicalite-1/ZSM-5 composite molecular sieve has the advantages of high coverage rate, uniform coverage and the like.

A preparation method of a multi-stage pore channel beta molecular screen belongs to the technical field of preparation of a multi-stage pore channel molecular screen. The preparation method is as follows: synthesizing the multi-stage pore channel beta molecular screen in one step by pseudo solid phase aluminosilicate; the molecular screen comprises a honeycomb-shaped structure or a plurality of particles in the size of 5micron to 60micron, the honeycomb-shaped structure or particles are polymerized by small crystal particles of a nano-level molecular screen, and the size of the small crystal particles of the nano-level molecular screen is 10nm to 100nm; and the aperture of one of meso pores formed by the polymerization of the small crystal particles of the nano-level molecular screen is 3nm to 45nm, and the aperture of a micro-pore is 0.6nm to 0.8nm. A second template agent is not in need during the synthesis process, so that the synthesis cost is reduced and the synthesis step is simplified; and in addition, the filtering is not in need after the crystallization is finished, therefore, the yield of the molecular screen is greatly enhanced.

The invention discloses a method for preparing a coating with nitric oxide catalytic activity. The method comprises the following steps: mixing a selenium-containing compound, a sulfur-containing compound and a soluble copper salt with the NO catalytic activity with a compound of an o-phenol structure, a flavone compound and a flavonol compound or a flavanone compound in a buffer solution for polymerizing. The coating with the nitric oxide catalytic activity can be applied to surface modification of matrix materials of almost all the materials, geometrical shapes and topological structures. The double selenium bonds, double sulfur bonds, copper ions and phenolic hydroxyl group in the prepared coating with the nitric oxide (NO) catalytic activity have excellent free radical scavenging functions; and the selenium bonds, sulfur bonds and chelated copper ions contained in the material have the response functions on reduced glutathione (GSH). In addition, the copper ions contained in the coating have antibacterial functions. The coating is used for catalyzing NO release and also can be applied to all the fields related to free radical scavenging and GSH response functions.

The invention belongs to the technical field of zeolite molecular sieve synthesis and relates to a synthesis method of a lamellar ZSM-5 molecular sieve. Morphology control is important in the field of molecular sieve synthesis, in a catalytic reaction, product selectivity, reaction activity and stability of MFI zeolite molecular sieve catalysts with different morphologies have obvious difference because of morphology difference. The synthesis method mainly utilizes a one kettle way to prepare ZSM-5 zeolite, has simple synthesis processes and can be industrialized easily. Through use of an effective additive, product crystallinity and final morphology can be effectively controlled. A sample XRD shows that the product is the ZSM-5 molecular sieve and has good crystallinity. SEM shows that the zeolite has lamellar morphology and can be used for olefin cracking industrial application.

The invention relates to a preparation method and an application method of a 4-9, 9-diaryl fluorene polymer material containing a substituted radical, belonging to the field of photoelectric material and organic information display science, in particular to a 4-9, 9-diaryl fluorene homopolymerize or copolymerization conjugated polymer containing the substituted radical and a preparation method thereof. The 4-9, 9-diaryl fluorene homopolymerize or copolymerization conjugated polymer containing the substituted radical is applied to organic electronic fields, such as organic light emission display, and the like, and has a structure as above. The polymer material keeps high heat stability, glass transition temperature, and the like and can be anticipated to become a polymer blue-light material with commercialized potential.

The invention provides a pyridine-fluorene organic electrophosphorescence main body luminescent material and a preparation method thereof, relating to new-generation organic luminescent display materials and technology. Due to the rigid structure, the luminescent material has high triplet energy level and favorable hole injection and transmission performance; and due to the three-dimensional large-volume steric hindrance effect, the luminescent material has stable amorphous state, and thus, can be widely used in organic light-emitting diodes. The specific design structure of the pyridine-fluorene main body material is disclosed in the specification. The invention particularly relates to a preparation method and application in organic light-emitting diode devices. The material has the advantages of high luminescence efficiency, high heat stability, high glass transition temperature and simple synthesis method, and can effectively inhibit concentration quenching and dimer luminescence. The preliminary structure as the main body material implements red-green-blue tricolor organic electroluminescent devices. The compounds have wide application prospects and huge commercial value in the aspects of electrophosphorescent main body materials.

The present invention relates to the preparation process of chitosan base macroporous high water absorption resin. After chitosan is dissolved in dilute acetic acid solution, acrylic acid is made to graft on the molecular chain of chitosan under the initiation of ammonium or potassium persulfate and the product is cross-linked with cross-linking agent, so as to produce high water absorption chitosan grafted acrylic resin with distilled water absorption of 560-1210 g/g and physiological saline absorption of 76-125 g/g. The prepared resin is further modified via solvent deposition process to form macroporous structure to raise the water absorbing rate greatly. High efficiency liquid phase chromatographic test shows that the resin has greatly reduced acrylic acid monomer residue.

The invention discloses a preparation method of monodispersity micron-sized polysilicon microspheres which comprises the following steps: (1) adding deionized water and a basic catalyst in trialkoxysilane, and stirring in a nitrogen condition for hydrolysis; (2) centrifugally separating and filtering a mixed system in step (1) to remove unreacted monomers; and (3) adding the basic catalyst in a reaction system obtained from the step (2) for polycondensation, filtering, washing and drying to obtain the monodispersity micron-sized polysilicon microspheres. According to the method, the reaction temperature is low, the reaction can be conducted at room temperature, the synthesis steps are simple; the method does not use organic solvents which pollute the environment or emulsifiers in the reaction process, is simple in post treatment, less in types of raw materials, high in yield, and low in preparation cost, and can effectively adjust the grain size range of the microspheres to realize controllable sizes; and the obtained silicon microspheres are good in grain size uniformity and high in monodispersity, and has extremely good sphericity.

The invention discloses an adsorbing material prepared from waste straws and capable of adsorbing trivalent arsenic from water as well as a preparation method and an application thereof, and belongs to the field of synthesis and application of environment functional materials. The adsorbing material is prepared by using the waste straws as matrixes through one-step quaternary ammoniated reaction. The preparation method is simple and the sources of the raw materials are wide; the prepared adsorbing material is capable of effectively adsorbing and removing the trivalent arsenic out of water; after adsorption, the trivalent arsenic in the adsorbing material can be desorbed by using a sodium chloride or sodium hydroxide solution; and the adsorbing material regenerated after desorption has stable arsenic adsorption property. The adsorbing material prepared by the method is an effective way of the resource utilization of the waste straws in farmlands.

The invention relates to a method for preparing CuInS2 nanoparticles by solvent thermosynthesis using biomolecules, which comprises the following concrete steps: firstly, preparing a copper source solution, then adding an indium source into the solution, evenly mixing, and adding a sulfur source into the mixed solution; dropwise adding an inorganic alkaline solution to regulate the mixed solution to be weakly alkaline, and evenly stirring; and finally, putting the solution in a high-pressure reaction kettle, reacting at constant temperature for a period of time, cooling, washing with a solvent, and drying to obtain the CuInS2 nanoparticles. By using nontoxic biomolecule L-cysteine as the sulfur source, the invention avoids the emission of toxic gas and lowers the technique cost. The L-cysteine can be used as both a sulfur source and a guide agent for reaction, is favorable for generating products with special structure and pattern and excellent photovoltaic properties, and develops a new way for synthesizing other semiconductor photovoltaic materials.

The invention relates to a linear water-based polyurethane thickener containing hydrophobic side bases and a preparation method of the linear water-based polyurethane thickener. The preparation method is characterized in that 40 weight percent to 60 weight percent of dibasic alcohol polymers, 10 weight percent to 30 weight percent of diisocyanate and 0 weight percent to 5 weight percent of catalysts are mixed, under the condition of N2 gas existence and the temperature being 50 DEG C to 100 DEG C, the stirring is carried out for 1 to 6 hours, then, 10 weight percent to 30 weight percent of end-capping agents are added, under the condition of the temperature being 50 DEG C to 100 DEG C, the stirring is carried out for 1 to 6 hours, polyurethane prepolymers are prepared, then, 5 weight percent to 20 weight percent of chain extenders are added into the prepared polyurethane prepolymers, the stirring is carried out for 1 to 6 hours under the condition of the temperature being 50 DEG C to 100 DEG C, and the linear water-based polyurethane thickener containing hydrophobic side bases is prepared. The linear water-based polyurethane thickener and the preparation method have the characteristics that no solvent exists, the toxicity is low, the environment is protected, the preparation process is simple, and the like. The prepared linear water-based polyurethane thickener containing hydrophobic side bases is applicable to the thickening of water-based paint, and the obvious thickening effect is realized.

The invention relates to a compound as shown in formula I for preparing fondaparinux sodium, a preparation method thereof and a preparation method of the fondaparinux sodium. The compound disclosed by the invention can be prepared from raw materials which are easy to obtain at higher selectivity and yield, thereby greatly simplifying the preparation process of the fondaparinux sodium. The definition of various substitutional groups contained in the formula I is the same as the definition in a specification.

The invention provides an amphiphilic Janus nano particle and a preparation method and application thereof. The preparation method comprises the following steps: dispersing silicon dioxide nanoparticles in water to obtain a dispersion liquid, mixing the dispersion liquid and liquid paraffin, heating and stirring in a water bath to form a Pickering emulsion, cooling to obtain small wax balls, adding a silane coupling agent into the small wax balls for modification to obtain modified small wax balls, mixing the modified small wax balls, an amidation catalyst and C12-C18 saturated fatty acid, andcarrying out an amidation reaction process to obtain organic hydrophobic chain grafted oil-water amphiphilic nanoparticles, and removing paraffin in the organic hydrophobic chain grafted oil-water amphiphilic nanoparticles to obtain the amphiphilic Janus nano particles. When the surfactant is used as an oil-displacing agent, oil-water interfacial tension can be effectively reduced at low concentration, rock wettability is changed, oil-displacing efficiency of nanofluid is remarkably improved, economic cost is reduced, and the surfactant has a wide application prospect.

The invention discloses a preparation method for a double quaternary ammonium side long chain anion-exchange membrane. The preparation method is characterized in that a dual-functional monomer with both tertiary amine group and quaternary ammonium group performs nucleophilic substitution on the main polymer chain with live benzyl bromine, benzyl chloride or chlorine acyl group, so as to obtain the double quaternary ammonium side long chain anion-exchange membrane. The raw materials are cheap and are easy to obtain, the preparation method is simple and is applicable to large scale industrial production, and the prepared anion-exchange membrane has the advantages of high ion conductivity, long service life, excellent mechanical property, and good solubility.

The invention provides a temperature-sensitive amphiphilic cyclodextrin polymer PCEC (polycaprolactone-polyethylene glycol-polycaprolactone, PCL-PEG-PCL). The polymer provided by the invention is the amphiphilic cyclodextrin polymer which is obtained by linking a PCL-PEG-PCL molecule with beta-CD (cyclodextrin) through utilizing the temperature-sensitive characteristic of a PCL-PEG-PCL triblock copolymer and the inclusion effect of beta-CD on a hydrophobic medicament, can effectively load and slowly release a hydrophobic or water-soluble medicament on the basis of the traditional hydrogel encapsulated water-soluble medicament, has proper critical gel temperature and can form in situ temperature-sensitive hydrogel after injection. According to the invention, the hydrophobic zone of the polymer is obviously enlarged, thereby effectively improving the loading capacity of the hydrogel on the hydrophobic medicament and obtaining high medicament encapsulation rate and medicament loading amount; and simultaneously, the controlled-release effect of the medicament after local injection delivery is realized by utilizing the temperature-sensitive gel performance of the polymer. The polymer provided by the invention has the following chemical structure shown in the specification.

The invention discloses a preparation method of RGD-modified ultra-small magnetic iron oxide nanoparticles. The preparation method comprises the following steps: preparing ultra-small magnetic iron oxide nanoparticles by taking ferric acetylacetonate as a reaction raw material and a precursor, taking oleylamine as a surfactant and a reducing agent and taking dibenzyl ether as a solvent; replacing oleylamine molecules wrapped on the surfaces of the nanoparticles by utilizing dopamine-modified HOOC-PEG-COOH to realize PEG-modification of the surfaces of the nanoparticles; and finally, chemically coupling RGD cyclic peptide by virtue of free carboxyl at the tail end of the PEG to obtain the RGD-modified ultra-small magnetic iron oxide nanoparticles. The method of synthesizing the ultra-small magnetic iron oxide nanoparticles has the characteristics of a simple process, a high raw material conversion ratio, strong repeatability and the like. The synthesized magnetic iron oxide nanoparticles have the characteristics of a regular morphology, an ultra-small dimension, good stability, good monodispersity, high biocompatibility, and tumor specific targeting, and the like, and can be used as a T1-weighted imaging high-performance magnetic resonance imaging contrast agent with a tumor active targeting function.

The invention belongs to the technical field of material preparation and separation, and relates to preparation of lithium/rubidium ion adsorbing materials, in particular to a preparation method and application of a modified hollow mesoporous silicon sphere adsorbent. Hollow mesoporous silicon spheres (HSs) are synthesized, a manganese-based lithium ion sieve (HMO) is supported on the surface of the hollow mesoporous silicon spheres (HS), and finally, 3-aminopropyltriethoxysilane (APTES) is modified to form the modified hollow mesoporous silicon sphere adsorbent. Synthetic process steps are simple, the prepared micro-nano hollow mesoporous silicon spheres have the advantages of large specific surface area, modifiable surface hydroxyl, good mono-dispersity, good particle size and duct size adjustability and the like, the surface of the micro-nano hollow mesoporous silicon spheres with a high specific surface is modified, and the adsorbing capacity of the materials is greatly improved. The manganese-based lithium ion sieve and the APTES are compounded with the micro-nano hollow mesoporous silicon spheres to obtain the modified hollow mesoporous silicon sphere adsorbent with unique physical and chemical properties, and lithium/rubidium ions can be efficiently adsorbed and separated in a high-selectivity manner.