124results about How to "Reduce self-aggregation" patented technology

The invention discloses a method for preparing manganese molybdate / cobalt molybdate hierarchical heterostructure nanowires. The method comprises the following steps of: preparing a NaMoO4 aqueous solution and a MnCl2aqueous solution; proportioning in a certain ratio of the NaMoO4aqueous solution to the MnCl2 aqueous solution to CTAB (Cetyltrimethyl Ammonium Bromide) to n-butyl alcohol to isooctane and preparing manganese molybdate nanorods by using a microemulsion method; adding the manganese molybdate nanorods into distilled water, stirring and ultrasonically cleaning to obtain transparent liquid; and adding the liquid into a flask, placing the flask in an oil bath of between 60 and 80 DEG C, condensing and refluxing, adding a CoCl2 solution and a Na2MoO4 solution with different concentrations in turn every certain time, stirring to react so as to obtain a product, separating and drying the product to obtain the manganese molybdate / cobalt molybdate hierarchical heterostructure nanowires, wherein the lengths of the nanowires reach 10 microns and the diameters of the nanowires are between 500 and 1,000nm; the manganese molybdate nanorods in the hierarchical heterostructure nanowires are used as a main material and the diameters of the manganese molybdate nanorods are between 300 and 500; and the cobalt molybdate is branch nanorods which orderly grow on the surfaces of the manganese molybdate nanorods and the diameters of the cobalt molybdate nanorods are between 30 and 50nm. The material has excellent electrochemical performance and can be used as an active material for electrodes of electrochemical super capacitors. The method has the advantages of low-cost raw materials, simple process and environmental friendliness.

A process for preparing the high-water-absorption flexible material by ultraviolet surface graft method includes immersing polyacrylic film in organic solvent, drying in air, loading it in reactor, adding solution of photosensitive agent, closing the reactor, introducing chlorine gas into it while ultraviolet ray radiation for graft, extracting the polyacrylic film with organic solvent, adding deionized water to acrylic acid, partial neutralization with NaOH, adding acrylamide, adding photosensing agent, taking out the polyacrylic film and ultraviolet graft. Its advantages are short reaction time, simple reaction condition, and high flexibility of product.

The invention discloses a sandwich-structured graphene / molybdenum selenide / nitrogen-doped porous graphene composite material and a preparation method and an application thereof. The structure unit includes a nitrogen-doped porous graphene layer of a substrate, a molybdenum selenide layer growing on the substrate, and a graphene layer as an outer protective film on the molybdenum selenide layer. Molybdenum selenide is grown in the middle of two graphene layers by using structural similarity. The inner nitrogen-doped porous graphene has good conductivity and a porous structure, which is conducive to electron transport and electrolyte infiltration. The graphene protective film on the surface can reduce the dissolution and destruction of molybdenum selenide and improve the stability and rate performance of materials. Therefore, technical problems such as serious self-agglomeration, weak conductivity, large volume deformation and low capacity caused by the use of pure molybdenum selenide asa negative material of sodium ion batteries are solved.

The invention discloses a preparation method of a polylactic acid grafted copolymer. Polylactic acid is used as a raw material and reacts with a grafted monomer through a solid phase grafting method under the effect of an initiator. The preparation method is characterized by specially comprising the steps that the temperature of a reactor with a stirring function is increased to 60-90 DEG C, polylactic acid, the grafted monomer and the initiator are added in, stirring is carried out for 5-20 min, and a reaction is carried out for 1-3 h; the temperature is increased to 100-110 DEG C, and the reaction continues to be carried out for 0.5-1 h; the temperature is increased to 110-120 DEG C, the reaction continues to be carried out for 0.5-1 h, and therefore the polylactic acid grafted copolymer is obtained. The polylactic acid is grafted and modified through the solid phase grafting method, the grafting reaction is carried out in a solid powder shape or granular shape through the gradual heating mode, the reaction temperature is low, the reaction is easy to control, the product grafting ratio is high, and the prepared grafted copolymer not only has the interface capacity increasing effect, but also has the complete degradation performance, and can be used as functional polymer materials such as an interface compatilizer of polylactic acid based composite materials.

The invention relates to a synthesis method of a styrene / acrylate-modified quick-drying water-based alkyd resin, which comprises the steps of synthesis of base alkyd resin and modification of the base alkyd resin. The styrene / acrylate-modified quick-drying water-based alkyd resin is synthesized by a fatty acid process and a graft copolymerization process. The method comprises the following steps: polycondensing monoacid, polybasic acid and polyalcohol to obtain a base alkyd resin; and mixing modifying monomers and an initiator, and dropwisely adding the mixture into the base alkyd resin to carry out graft copolymerization, thereby obtaining the modified alkyd resin. The quick-drying water-based alkyd resin obtained by the method provided by the invention has the advantages of quick drying at normal temperature, high hardness, hydrolysis resistance, high water resistance, strong weather resistance and high glossiness.

Hydroxamate substituted azaindoline cyanine dyes, conjugates thereof and methods of using the same are provided. The subject cyanine dyes include an azaindoline ring having a hydroxamate substituent. The dyes may further include a reactive group moieties (RGM) and / or a water soluble group. Also provided are conjugates of the subject dyes. Also provided are tandem conjugates including a fluorescent protein capable of energy transfer to the dye. Methods of detecting an analyte in a sample by contacting the sample with a detection reagent are provided. The detection agent may be a dye-conjugate that specifically binds the analyte, or may be a reactive dye which conjugates to the analyte. Also provided are compositions, e.g., kits, etc., incorporating such dyes which facilitate use in such methods.

The invention relates to a method for preparing cationic-dyeable copolyester. Wool tops manufactured by spinning the product obtained by the method have excellent anti-pilling effect and spinning property. The method for preparing the cationic-dyeable copolyester comprises the following steps that: (1) glycol and terephthalic acid undergo an esterification reaction; (2) a mixture obtained after the esterification reaction is added with the glycol and SIPE solution is added for ester exchange reaction after the mixture and the SIPE solution are uniformly mixed; (3) a mixture obtained after theester exchange reaction undergoes a condensation polymerization reaction to form the cationic-dyeable copolyester. In the step (2), the mol ratio of the added glycol to the terephthalic acid is 0.1:1-0.2:1, and the mole number of sulfonic acid groups in the SIPE solution is 2 to 3.5 percent of that in the terephthalic acid. The cationic-dyeable copolyester obtained by the method has excellent spinning property. Meanwhile, the wool tops manufactured by spinning have excellent dyeability and excellent anti-pilling effect and can replace wool.

The invention relates to a preparation technology of lauromacrogol. The preparation technology takes lauryl alcohol, potassium hydroxide, oxirane, absolute ethyl alcohol and activated carbon as raw materials. The preparation technology is simple; no special equipment is required; a solvent can be recycled, so that the industrial production cost is lowered; potassium hydroxide serves as a catalyst, so that operation is simplified; the content of heavy metal is controlled easily according to a medicinal quality standard requirement; lauromacrogol is high in yield.

The invention relates to a preparation method of normal pressure cation dyeable copolyester, comprising the following steps of: (1) carrying out esterification reaction to glycol, terephthalic acid and m-phthalic acid; (2) adding glycol, mixing uniformly, then adding SIPE solution and carrying out ester exchange reaction; and (3) adding aliphatic dibasic acid into mixture obtained after ester exchange reaction, uniformly mixing, then carrying out polycondensation reaction and preparing normal pressure cation dyeable copolyester, wherein the molar ratio of the terephthalic acid and m-phthalic acid is 50:1 to 90:1, the ratio of mole number of the aliphatic dibasic acid and the sum of the mole numbers of the terephthalic acid and m-phthalic acid is 0.05:1 to 0.15:1; the ratio of the mole number of the added glycol in the step (2) and the sum of the mole numbers of the terephthalic acid and m-phthalic acid is 0.1:1 to 0.5:1; the ratio of the sum of the mole numbers of the terephthalic acid, m-phthalic acid and the aliphatic dibasic acid and the mole number of the sulfonic acid group in SIPE solution is 9:1 to 28:1.

The invention relates to a production method of normal-pressure cation dyeable copolyester endless tow, chopped fiber and top wool. The normal-pressure cation dyeable copolyester endless tow is obtained by spinning normal-pressure cation dyeable copolyesters. A preparation method of the normal-pressure cation dyeable copolyesters comprises the following steps of: (1) carrying out an esterification reaction on ethylene glycol, terephthalic acid and m-phthalic acid; (2) adding ethylene glycol, mixing, adding an SIPE (5-Sodium Sulfonate Isophthalate Ethyl-ester) solution and carrying out an ester exchange reaction; and (3) adding a mixture obtained in the ester exchange reaction into binary fatty acid, mixing uniformly, and carrying out a condensation polymerization reaction to obtain the normal-pressure cation dyeable copolyesters, wherein the molar ratio of the terephthalic acid to the m-phthalic acid is 50:1-90:1; the ratio of the mole number of the ethylene glycol added in the step (2) to the total mole number of the terephthalic acid and the m-phthalic acid is 0.1:1-0.5:1; and the ratio of the total mole number of the terephthalic acid, the m-phthalic acid and the binary fatty acid to the total mole number of sulfonic acid groups in the SIPE solution is 9:1-28:1.

The invention provides a preparation method of a slump-proof polycarboxylate superplasticizer. The slump-proof polycarboxylate superplasticizer is prepared by bulk polymerization. The preparation method comprises the steps of (1) mixing polyoxyethylene polyoxypropylene ether and polyoxyethylene ether, stirring well at controlled temperature of 40-60 DEG C, and adding an initiator and a mixture ofunsaturated carboxylic acid, unsaturated carboxylates and a chain transfer agent; (2) curing for 0.5-1 hour after completion of step (1), and cooling to obtain the slump-proof polycarboxylate superplasticizer. The bulk polymerization is performed at relatively low temperature, the conditions are mild, operability is high, and the synthesized polycarboxylate superplasticizer has high water-reducingproperty. The polycarboxylate superplasticizer prepared herein is in liquid state at normal temperature, having an effective concentration of 100% and good stability of storage performance; the polycarboxylate superplasticizer is applicable to long-range transport and use; the polycarboxylate superplasticizer has excellent slump-proof performance; the problem can be solved that concrete slumps due to high temperature and long transport time; the polycarboxylate superplasticizer has a promising industrial application prospect.