304 results about "Azobis(isobutyronitrile)" patented technology

The invention relates to binary acrylonitrile copolymer spinning solution and a corresponding production method. The spinning solution comprises main monomer acrylonitrile and dimethyl sulfoxide solution with copolymer of itaconic acid Beta- monoester; the weight of the main monomer accounts for 90% to 99.5% of that of monomer, while the weight of the comonomer accounts for 0.5% to 10% thereof. The monomer is composed of the main monomer and the comonomer and the weight percentage concentration of the monomer is from15% to 25%. The dimethyl sulfoxide solution, the main monomer acrylonitrile, the comonomer, free radical initiator of azobisisobutyronitrile are added to a reactor by proportion and then mixed at room temperature and reacted for six to thirty six hours at a constant temperature of 50 DEG C to 70 DEG C to remove bubble of residual monomer and obtain the solution with protection from nitrogen which has bubbled for twenty minutes. The solution has a uniform chain structure and itaconic acid Beta-monoester contains two functional groups of carboxy and ester, thus being able to improve spinnability of polyacrylonitrile resin as well as regulate an oxidation-carbonization process of carbon fiber precursor. Due to introduction of a bifunctional group of monomer itaconic acid Beta-monoester, the amount of acrylonitrile comonomer is greatly reduced to improve performance of carbon fiber.

The invention discloses a preparation method of cellulose graft acrylate copolymer. The method comprises the following steps of: by utilizing water as a solvent, N, N-methylene bis-acrylamide as a cross-linking agent, azobisisobutyronitrile as an initiator, cellulose as a base body and sodium acrylate and N-vinyl pyrrolidone as comonomers, and adopting a solvent polymerization method, polymerizing so as to obtain the copolymer. The strong chelation capability of a macromolecular chelating agent and the strong adsorption capabilities of carboxyl and amido bond are utilized, so that the copolymer has the characteristics of strong adsorption capability, large adsorption capacity and high decolorization rate on heavy metal ions and organic cationic dyes in the wastewater, and can be used for absorbing and removing organic cationic dyes such as metal ions and methylene blue in the wastewater. The removal rates of the cellulose graft acrylate copolymer on copper ions and methylene blue in the wastewater respectively reach 95.1% and 99.5%. In addition, the cellulose graft acrylate copolymer adopts raw materials which are low in cost and easily obtained, is simple in preparation technology, low in cost and beneficial to industrialization.

The invention is concerned with the prepare method of capillary for solid phase microextraction. The methacrylic acid glycidyl is function monomer, the ethyleneglycol dimethacrylate is vulcanizing agent, toluene and dodecyl are mixed pore-causing agent, and 2,2'-azobisisobutyronitrile is initiator. Mix and mill the stuff and pour into quartz capillary disposed with ethylene, close and heat to polymerization. After the reaction, use solvent to clean capillary and remove the rudimental monomer, vulcanizing agent and pore-causing agent to get whole capillary with the polymer of methacrylic acid glycidyl and ethyleneglycol dimethacrylate. Use vitriol to clear the whole capillary to get hydroxylation, or clear the capillary with diethylamine and close to heat at 65 to 75 degree to get the capillary with the polymer of methacrylic acid glycidyl and ethyleneglycol dimethacrylate derived from diethylamine. The method is easy and low cost and the extraction agency stuff is fit to set up a credible and high sensitive analysis method.

The invention relates to a preparation method of a stable chitosan nano-micelle with CO2 responsiveness and temperature responsiveness. The preparation method comprises the following steps: under the protection of an inert gas such as argon and nitrogen, carrying out esterification reaction between the hydroxy group or the amino group in the main chain of chitosan and the reversible addition-fragmentation chain transfer (RAFCT) polymerization chain transfer agent for a carboxyl end group to obtain the RAFCT polymerized macromolecule chain transfer agent; under the initiating effect of azobisisobutyronitrile, carrying out RAFCT polymerization on N-isopropyl acrylamide and a N,N-dimethylaminoethyl methacrylate monomer to obtain the grafted copolymer taking chitosan as the main chain and having CO2 responsiveness and temperature responsiveness, dissolving the grafted copolymer in water to obtain the stable nano-micelle with CO2 responsiveness and temperature responsiveness. The stable chitosan nano-micelle with CO2 responsiveness and temperature responsiveness provided by the invention simultaneously has biodegradability, biocompatibility, bioactivity, CO2 responsiveness and temperature responsiveness, and is widely applied to the fields of controlled release drug carrier, biological intelligent switch, biosensor, and the like. The preparation method provided by the invention is simple and easy to carry out, the raw materials can be produced industrially, and therefore the preparation method has excellent popularization and application value.

The invention relates to bi-components for manufacturing polyurethane sole materials, wherein the raw material formula of a polyol component comprises polyester polyol, micromolecular polyol as a chain extender, a catalyst, a foaming agent and a foam homogenizing agent, wherein the foaming agent comprises water and azobisisobutyronitrile; the polyester polyol comprises polyglycol diethylene glycol sebacate polyol and polyglycol diethylene glycol succinate polyol; the micromolecular polyol is glycol; the catalyst is triethylene diamine; and the foam homogenizing agent is dimethyl siloxane. In the polyol component, the azobisisobutyronitrile and water are used together as the foaming agent, and the special combination of the polyester polyol, the chain extender, the foam homogenizing agent, the catalyst and the like is adopted, thus the problem of surface crusting of the polyurethane sole materials can be better solved; the surface of a manufactured sole is smooth, and the edges of the sole have thicker crusts to prevent the currency of sagging; and moreover, the sole has good and uniform elasticity and is soft and comfortable.

A preparation method of a transparent matting polyester film is characterized in that 100-260 parts by weight of ethylene glycol ethyl ether is added into a reactor and heated up to 80-100 DEG C for stirring up; 5-20 parts of nano silicone oxide is added and heated up to 125-135 DEG C; then 30-60 parts of methyl metharcrylate, 10-40 parts of ethanediol, 20-40 parts of 2 - hydroxyethyl methacrylate and 50-80 parts of glycidyl methacrylate are added in sequence for uniformly stirring up and introduced with nitrogen, then 0.2-0.8 part of azobisisobutyronitrile is added; the reaction is carried out for 6-8 hours under 80-115 DEG C, so as to obtain a transparent matting acrylic resin; the transparent matting acrylic resin is mixed with solution to obtain acrylic acid transparent matting resin solution; finally, the obtained acrylic acid transparent matting resin solution is coated on polyester film via coating process, thus obtaining the transparent matting polyester film. The film is applicable in heat transfer field, optics, advertisement cartography field, etc.

The invention provides a preparing method of Tetracycline molecular imprinting column. The invention includes the following steps: dissolving template molecular Tetracycline (TC) with ultrasound in methanol, adding functional monomer and pore-forming agent (cyclohexanol and lauryl alcohol), oscillating for 6 hours, adding crosslinking agent (ethylene glycol dimethacrylate) and initiator (azobisisobutyronitrile), after ultrasonic degassing, adding nitrogen for 20 minutes, deoxidizing, pouring the solution into 10cm stainless column with bottom sealed, sealing the top end, putting the column into 60 DEG C water for water bath, after 12 hours, obtaining the molecular imprinting column by heat initiation reaction. Connecting the column to the high-pressure pump for washing away the pore-forming agent and template molecular, in the end the molecular imprinting column with good separation effect is obtained. Compared with traditional bulk polymerization method, the invention has the characteristics of simple preparation for avoiding process of lapping, good molecular recognition ability and so on. The molecular imprinting column provided by the invention is used as a liquid chromatogram filling, and can realize separation, enrichment and purification of Tetracycline antibiotics.

The invention relates to a high temperature solvent resistant acrylate pressure sensitive adhesive which comprises the following components in parts by weight: 150-250 parts of 2-ethylhexyl acrylate, 50-100 parts of butyl acrylate, 3-10 parts of acrylic acid, 3-10 parts of hydroxyethyl acrylate, 10-20 parts of vinyl acetate, 15-35 parts of bornyl isoacrylate, 0.5-3 parts of azobisisobutyronitrile, 0.3-2 parts of N-hydroxymethyl acrylamide and 400-600 parts of ethyl acetate. The mechanical property, high temperature resistance and weather resistance of the emulsion type acrylate pressure sensitive adhesive are improved, so that the application range of the emulsion type acrylate pressure sensitive adhesive is widened, and the pressure sensitive adhesive has the characteristics of high viscidity, high temperature resistance, damp-heat aging resistance and low cost.

The invention relates to the field of coating preparation, and discloses an organic-silicon modified acrylic acid resin superhydrophilic antifogging coating and a preparation method thereof. The primary reaction raw materials comprises, by weight, 6.3-10.7% of methymethacrylate, 4.5-7.9% of butyl acrylate, 8.8-15.3% of gamma-methacryloxypropyl trimethoxysilane, 8.1-13.9% functional monomer hydroxyethyl methylacrylate, 16.0-27.0% of the reaction produict of diethanol amine and glycidyl methacrylate 3-(bis(2-hydroxyethyl)amino)-2-hydroxypropyl methacrylate and 7.4-12.8% of 2-acrylamide-2-methylpropionic sulfonic acid, the using amount of the azobisisobutyronitrile is 0.2%-0.4%, and the reaction solvent is N, N-dimethylformamide which takes up the 25.3%-45.6% of the total amount. The coatinghas the advantages of lower preparation temperature, good stability, simple production process, the purpose of energy saving is achieved, invested equipment is less, the coating is transparent leveledand has high adhesion force, -40 DEG C low temperature fog resisting and 80 DEG C high-temperature fog resisting can be achieved, the coating does not wrinkle, there exists no crack, and the coatingcan be repeatedly used for over 100 times.

The invention provides a dibutyl phthalate molecularly imprinted polymer (DBP-MIP) and a preparation method thereof, belonging to the technical field of analytical chemistry. The DBP-MIP is prepared by dissolving a template molecule DBP, a functional monomer methacrylic acid and a crosslinking agent ethylene glycol dimethacrylate into a porogen chloroform or acetonitrile, adding an initiator azobisisobutyronitrile, filling nitrogen to remove oxygen, carrying out initiated polymerization at 55-75 DEG C, and grinding, sieving and washing a polymer after completing reaction. An MIP solid phase extraction column can highly selectively separate and enrich DBP in samples such as environment, food, chemical products and the like and effectively remove matrix interference.

The invention relates to a high-toughness silicon oxide aerogel super-adiabatic thermal-insulation coating. The high-toughness silicon oxide aerogel super-adiabatic thermal-insulation coating is prepared from the following raw materials in parts by weight: 36-40 parts of tetraethylortho silicate, an appropriate amount of hydrochloric acid, ammonia water, ethanol and deionized water, 0.01-0.02 part of azobis isobutyronitrile, 0.2-0.3 part of styrene, an appropriate amount of chlorobenzene, 1-1.5 part of vinyltrimethoxysilane, 0.5-0.9 part of diisocyanate, 70-75 parts of E-12 epoxy resin, 9-12 parts of ethylene glycol dimethyl ether and 7-7.5 parts of triethanolamine. Silicon oxide aerogel is modified with styrene and diisocyanate in the production process so that the strength and toughness of the aerogel are increased, the water absorption is decreased, the breaking phenomenon is avoided, the thermal-insulation property is not affected and the coating can be used as indoor and outdoor wall coating and has broad market space.

The invention discloses a preparation method of a highly cross-linked macroporous/mesoporous solid acid catalyst. The preparation method comprises the following steps: synthetizing hydrophobic silicon dioxide particles; mixing the hydrophobic silicon dioxide particles, divinylbenzene (DVB), span80 and 2,2'-azobis(2-methylpropionitrile) (AIBN) in a certain ratio to form oil phase; and dissolving potassium persulfate, potassium sulfate and sodium p-styrenesulfonate (SS) in deionized water to form water phase, adding the water phase to the oil phase to form Pickering high internal phase emulsion, and performing polymerization, high crosslinking and sulfonation on the Pickering high internal phase emulsion to obtain the highly cross-linked macroporous/mesoporous solid acid catalyst. HC-PDVB-SS-SO3H produced by the preparation method can be easily and quickly separated from a reacted mixture, has remarkable acid catalytic effect and high repeatability, and can be converted to 5-hydroxymethylfurfural by catalytic cellulose in one step, and high yield can be achieved.

The present invention discloses a method for preparing a high-sensitivity nano-zirconia-doped dezocine molecular imprinting electrochemical sensor, the high-sensitivity nano-zirconia-doped dezocine molecular imprinting electrochemical sensor is prepared by use of dezocine as a template molecule, (5s, 8s)-3-(4'-chloro-3'-fluoro-4-propenyl-biphenyl-3-yl)-4-hydroxy-8-methoxy-1-aza-spiro [4.5] dec-3-ene-2-one as a single function monomer, azobisisobutyronitrile as an initiator, nano-zirconia as a dopant and maleic rosin ethylene glycol acrylate as a crosslinking agent, wherein the maleic rosin ethylene glycol acrylate is prepared from rosin as a raw material, and the method is simple and practical, and overcomes the shortcomings that a conventional analysis method is complicated, expensive in equipment, and low in sensitivity.

The invention discloses a method for preparing waterborne anticorrosion coating resin vinylidene chloride-acrylate. In the method, vinylidene chloride, acrylate and different compounded emulsifiers are pre-emulsified, and azodiisobutyronitrile is used for initiating polymerization reaction. The method comprises the following steps of: adding partial pre-emulsion into a reactor; heating to temperature higher than the initiation temperature of an initiator, adding the initiator, and performing polymerization reaction at constant temperature to obtain seeded emulsion; and dripping the rest pre-emulsion into the reactor and continuously performing the reaction at constant temperature. The emulsion has high stability, uniform particle size, high resin adhesion and high film and anticorrosion properties, is environment-friendly and nontoxic, and can provide good corrosion protection for carbon steel matrixes.

The invention discloses high-adhesion thermoset acrylic resin which comprises, by weight, 18-25 parts of dimethylbenzene, 5-10 parts of n-butyl alcohol, 8-13 parts of methyl methacrylate, 15-20 parts of ethyl methacrylate, 8-13 parts of methacrylic acid ethyl ester, 15-25 parts of styrene, 8-15 parts of functionality polyester resin, 0.8-1.5 parts of functionality mix addition catalyst and 0.8-1.5 parts of grafting couplant. The functionality polyester resin comprises, by weight, 28-33 parts of neopentyl glycol, 12-17 parts of trimethylolproprane, 5-10 parts of adipic acid and 40-50 parts of isophthalic acid and is obtained through esterification synthesis by using a high-temperature melting method. The functionality mix addition catalyst is mixture of 8-12 parts of peroxidation 2-ethylhexoic acid tert-butyl ester, 20-30 parts of azobisisobutyronitrile, 50-60 parts of peroxidation tertiary butyl and 10-15 parts of tert-butyl perbenzoa. Phenomena of layering, pig skin and livering can not occur during storage and construction of paint made from the high-adhesion thermoset acrylic resin, and good adhesion is achieved when the paint is directly coated on a base material hard to attach.

The invention discloses a preparation method and application of aggregation induced luminescence-molecular imprinting fluorescence sensor for detecting rhodamine B. According to the method, the molecular imprinting technology and fluorescence detecting technology are combined, warfarin is used as a template molecule, alpha-methacrylic acid is used as a functional monomer, ethylene glycol dimethylacrylate is used as a cross-linking agent, azobisisobutyronitrile is used as an evocating agent, acetonitrile is used as a dissolvant, functionalized AIE molecules are added, and the precipitation polymerization method is adopted to synthesize AIE-MIPs. The AIE-MIPs is simple to operate, organic reagent use is little, ability to recognize the rhodamine B is high, the linear relationship is good inthe concentration range of 1*10<-5>-10*10<-5>mol/L. The AIEMIPs is adopted to carry out standard recovery experiment for papaya dry and Fanta beverage, the results showthat the recovery range of therhodamine B is 96.2%-103.5%, and the relative standard deviation range is 1.5-4.7%. The data indicates that the AIE-MIPs obtained by the combination of fluorescence detecting and molecular imprintingcan be applied to detection of rhodamine B in practical samples.

The invention discloses a simple and efficient method for preparing a three-dimensional carbon nanotubes/graphene hybrid material. The method comprises the following steps: (1) respectively processing carbon nanotubes and graphene microchip with concentrated sulfuric acid and concentrated nitric acid; (2) in the presence of azobisisobutyronitrile as an initiator, carrying out atom transfer radical polymerization on acryloyl chloride as a monomer to obtain a light yellow solution of polyacryloyl chloride; (3) grafting the hydroxylated carbon nanotubes obtained in the step (1) with polyacryloyl chloride; and (4) grafting the polyacryloyl chloride-grafted hydroxylated carbon nanotubes with hydroxylated graphene microchip obtained in the step (1). According to the method, by chemical 'grafting-to' technology, hydroxylated carbon nanotubes and hydroxylated graphene microchip are connected together and the method has the advantages of simplicity in process, strong operability, good reproducibility, small pollution and short period and is easy for large-scale production.

The invention relates to a method for preparing a high-performance polyacrylonitrile solution for carbon fibers, and especially relates to a method for preparing the polyacrylonitrile solution through adopting a new initiator to mainly solve a problem of difficult process control caused by wide molecular weight distribution or abundant gel generation of solutions prepared through a single initiator used for preparing an acrylonitrile solution in the prior art. According to the invention, the initiator comprises 70-100 parts by weight of azodiisobutyronitrile and 1-30 parts by weight of azobisisoheptonitrile. The method well solves the problem through above technical scheme, and can be used for the industrial production of the acrylonitrile solution polymerization

The invention relates to a high-temperature-resistant photochromic TPU film. The high-temperature-resistant photochromic TPU film is characterized in that raw materials for the film include 4,4'-diphenylmethane diisocyanate, polyether polyol, a chain extender, azodiisobutyronitrile and a catalyst, wherein a mass ratio of 4,4'-diphenylmethane diisocyanate to azodiisobutyronitrile is (5-15): 1. The high-temperature-resistant photochromic TPU film has high photosensitivity and good physical properties and does not vary in color at a high temperature; and the preparation method for the TPU film is simple in process and applicable to industrial production.