204 results about "Chemical Modifier" patented technology

The present invention discloses a process for depositing a carbon containing silicon oxide film, or a carbon containing silicon nitride film having enhanced etch resistance. The process comprises using a silicon containing precursor, a carbon containing precursor and a chemical modifier. The present invention also discloses a process for depositing a silicon oxide film, or silicon nitride film having enhanced etch resistance comprising using an organosilane precursor and a chemical modifier.

Disclosed is a highly transparent fiber-reinforced composite material including an assembly of cellulose fibers of 4 to 200 nm average fiber diameter impregnated with a matrix material so as to not only remedy the moisture absorbency attributed to cellulose fibers but also further improve transparency. There is provided a fiber-reinforced composite material including an assembly of cellulose fibers impregnated with a matrix material. In the fiber-reinforced composite material, hydroxyl groups of cellulose fibers are chemically modified through a reaction with one or more chemical modifiers selected from the group consisting of an acid, an alcohol, a halogenating reagent, an acid anhydride, and an isocyanate so that the ratio of a functional group introduced by the chemical modification is 5 to 40 percent by mole based on the hydroxyl groups of cellulose fibers before the chemical modification. The chemical modification of hydroxyl groups of cellulose fibers can reduce the hydrophilicity of cellulose fibers to thereby reduce the moisture absorbency of fiber-reinforced composite material. Further, the affinity between cellulose fibers and matrix material can be enhanced to thereby further improve transparency.

The invention discloses a method for preparing graphene oxide / carbon nano tube / cellulose composite gel from ionic liquid, relating to a preparation method of cellulose composite gel and aiming to solve the technical problems that the composite gel obtained by using the traditional method is polluted by a solvent and the gel is easy to deform in a solvent exchange process. The method comprises the following steps of dissolving cellulose into ionic liquid; then, adding graphene oxide and carbon nano tube dispersing liquid; pouring a mixed solution obtained after reacting under heating into a die; standing for cooling; then, replacing the ionic liquid by using water; next, drying to obtain the graphene oxide / carbon nano tube / cellulose composite gel. The graphene oxide / carbon nano tube / cellulose composite gel can be used for a sensor, an electromagnetic shielding material, a chemically modified electrode or a supercapacitor.

The invention discloses a protein flocculant for treating printing and dyeing wastewater. The protein flocculant for treating the printing and dyeing wastewater is prepared from various animal protein powders originating from cheap waste animal pelts, hoofs, animal fur powders and bean pulps aiming at different groups in a protein molecule and a chemical modifier for reaction. The invention simultaneously provides a protein flocculant compound. The invention provides a simple and practicable method; and by utilizing the method, various dye waste waters discharged in printing and dyeing plants and dye production plants can be effectively treated, and the product cost is cheap.

The invention discloses a high-viscosity modified asphalt material. The asphalt material is prepared from the following raw materials in parts by mass: 100 parts of matrix asphalt, 4-7 parts of a thermoplastic elastomer, 4-10 parts of waste rubber powder or an ethylene-vinyl acetate copolymer, 1-3 parts of a plasticizer, 2-4 parts of thermoplastic resin, 3-5 parts of a solubilizer, 0.2-2 parts ofa stabilizer, 0.5-1.5 parts of a chemical modifier and 0.2-0.7 part of polypropylene glycol. Through the high-viscosity modified asphalt material, the storage stability of high-viscosity modified asphalt is improved; meanwhile, high-temperature viscosity of the high-viscosity modified asphalt is reduced; when the high-viscosity modified asphalt material is applied to mixing of asphalt mixture, themixing temperature is low; the high-viscosity modified asphalt material is easy to construct, low in cost and simple in preparation method.

The invention discloses a method for fixing pollutants in pollution source soil in abandoned mine fields and application thereof. The fixing method comprises the steps of loosening the soil, digging holes, adding modifier and fertilizer to balance the soil in the holes, planting energy trees in the soil in the holes, sowing pioneer grass seeds on the topsoil in the holes, and the like. The invention uses chemical modifier and fertilizer to modify the planting condition of the polluted soil in mine areas, then interplants pioneer grass, fast-growing energy trees and other plants to effectively fixe substances such as heavy metal pollutants in soil, avoid the pollutants from being discharged to downstream areas in the form of acidic mine waste water to pollute the environment and damaging the ecology.

The invention discloses a chemical-giant reed combined ecological recovery method of polymetal polluted soil in mining and metallurgy zones. According to the method, ecological recovery of the polymetal polluted soil in mining and metallurgy zones is carried out with the combination of a soil chemical modifier and by a reasonable cultivation technology of giant reed with strong anti-adversity ability, fast growth speed and large biomass. In the planting year, a proper amount of base fertilizer is applied to promote rapid survival and reproduction of giant reed seedling. In the next year, giant reed grows and reproduces automatically and an ecological system is gradually formed. After chemical-giant reed combined ecological recovery of the polymetal polluted soil, the concentration of As, Cd, Cu, Pb and Zn in underground water reaches Underground Water Quality Standard (GB / T14848-93) III; and the giant reed overground part biomass dry weight per year can reach 15000kg / ha. After charingor liquefaction, the giant reed harvest can be returned to a heavy metal technology as a bio-energy raw material for comprehensive utilization.

The present invention provides an electrochemical detection method for content of glycosylated hemoglobin in the blood, and is characterized in that: whole blood specimen is diluted by combined liquid ranging from 30 times to 70 times and passes through a glycosylated protein recognizer, electric activated small molecules are filled into the effluent liquid from the glycosylated protein recognizer, and electrochemical response of the liquid is detected by chemically modified electrodes after the filling, thereby obtaining the concentration of the blood glucose. The glycosylated protein recognizer is eluted by elute solvent, and the electrochemical response of the elute solvent is detected and the concentration of the glycosylated hemoglobin is obtained, thereby obtaining the content of the glycosylated hemoglobin of the sample after calculation. As the electrochemical detection is simple in operation, lower in cost and rapid in the analysis, the present invention is expected to realize the rapid determination of the clinical glycosylated hemoglobin and the rapid determination of the glycosylated hemoglobin after separation and elution.

The invention relates to a paste quick-setting grouting material and a preparation method thereof. The material comprises the following components in part by weight: 1 part of portland cement, 1 part of water and 0.1 to 1.5 parts of chemical modifier, wherein the chemical modifier is a mixture of a sodium salt quick-setting agent, a water reducing agent and a hydroxy polymer. The paste quick-setting grouting material of the invention overcomes the defects that the conventional quick-setting grouting material is difficult to control and cannot resist dispersing in the water, and has the characteristics of difficultly blocking grouting pipelines or drill holes, along with high strength.

The invention discloses a PEG (Polyethylene Glycol) / mPEG (Methoxy Polyethylene Glycol) chemical modifier and a method thereof for preparing a water-soluble resveratrol prodrug. In the PEG / mPEG chemical modifier, PEG or mPEG is used as a vector, and the chemical modifier is prepared through reacting succinic anhydride, bromoacetate or isobutyl bromoacetate with amino acid. The preparation conditions and steps of the chemical modifier are simple. The chemical modifier is used for modifying the resveratrol to prepare the resveratrol prodrug, can change the water solubility and the stability of the resveratrol, is convenient to use and improves the bioactivity. When the prodrug is decomposed in vivo, amino acid required by the human body is also released while the resveratrol is released, thus the application scope of the prodrug is wider than that of the resveratrol.

The invention discloses a preparation method for a high-viscosity modified asphalt. The method comprises the following steps: (1) mixing uniformly a ductility improver, partial chemical modifier, and aromatic oil to prepare a ductility improver mother liquid; (2) mixing the ductility improver mother liquid, the left chemical modifier and matrix asphalt to react to obtain the high-viscosity modified asphalt. The chemical modifier is one or more of orthophosphoric acid, polyphosphoric acid, polyphosphoric acid, or amine polyphosphate. According to the high-viscosity modified asphalt prepared by the chemical modification method, the storage stability of the high-viscosity modified asphalt is improved, the cost is low, and the preparation method is simple and is easy to implement.

The invention provides a method for performing one bath of ramie fiber preparation and chemical modification. The method comprises the steps of: firstly, blending peroxide, sodium tripolyphosphate, urea, peroxide stabilizer, a penetrant and water into degumming solution; then mixing raw ramie with the degumming solution according to the mass ratio of 1:1, increasing the temperature and holding the temperature, and removing a part of gum; and finally, adding chemical modifier into the raw ramie and degumming solution mixture, increasing the temperature, boiling off, thoroughly removing gum to obtain the chemically modified textile ramie fibers. The method overcomes the deficiencies of the prior art, is simple in flow process, the original three procedures are combined into one bath solution, so that the total reaction time is shortened, the washing procedure in the middle link can be omitted, the energy consumption can be greatly reduced, the pull rate is improved, the breaking strength, the breaking elongation rate, the flexibility, fineness properties of the special ramie fibers can be obviously improved, and the performance index can achieve the ramie spinning requirement.

The invention relates to an electro-polymerizable chemically-modified electrode organic material and application of the electrode organic material in ultra-trace TNT (Trinitrotoluene) detection and belongs to the field of electrochemical sensing technologies. The structural formula of the organic material is shown in the specification, wherein the molecular main chain skeleton consists of an A and two side units B. The A can be pyrene, naphthalene, anthracene, an anthracene derivative, phenanthrene, dibenzo-quinoxaline or the like; each B can be benzene, biphenyl, phenylene vinylene, fluorene or the like; each unit C is an electro-active unit and can be furan, pyrrole, thiophene, carbazole, diphenylamine, triphenylamine or the like. A connecting chain R for the molecular main chain skeleton and electrochemically-polymerized groups can be an alkyl chain, alkoxy chain or oxy chain. Carbazolyl groups can be subjected to crosslinking during electrochemical polymerization, and molecules can form spherical micro-nano structures due to crosslinking, so that on one hand, the contact specific surface area between the molecules of the organic material and TNT molecules is increased, on the other hand, due to pore structures formed among the micro-nano structures, TNT molecule diffusion paths are increased, and electrical signal response is enhanced.

The invention discloses a catalyst for catalyzing methyl alcohol. The catalyst disclosed by the invention comprises graphene, a polyacrylic acid-ferrocene compound and metal nanoparticles, wherein the mass ratio of the grapheme to the polyacrylic acid-ferrocene compound and the metal nanoparticles is (20-50):(150-250):(1-15). The graphene is taken as a substrate material of the catalyst for catalyzing methyl alcohol disclosed by the invention; the polyacrylic acid-ferrocene compound can enter a layer structure of the graphene to inhibit the aggregation of the graphene; homogeneous nucleation of the metal nanoparticles is promoted by the polyacrylic acid, so that the loaded metal nanoparticles has a higher catalytic activity; due to a net structure of the polyacrylic acid, the graphene-polyacrylic acid-ferrocene has a multi-channel stereoscopic structure, the movement of the particles is buffered and the homogeneous growth of the metal nanoparticles is further promoted. Therefore, the catalyst for catalyzing methyl alcohol disclosed by the invention has the advantages of higher catalytic activity for methanol and higher capability of resisting the poisoning of an intermediate.

The invention discloses nucleic acid aptamers specifically combined with beta-amyloid precursor protein lyase 1 and an application of the nucleic acid aptamers. The nucleotide sequences of the nucleic acid aptamers are any one of SEQ ID NO: 1 and SEQ ID NO: 2. The nucleic acid aptamers or chemical modifiers of the nucleic acid aptamers serving as BACE1 inhibitors can be applied to preparing drugs for treating Alzheimer's disease. The DNA aptamers A1 and A4 which can be combined with BACE1 with high affinity are successfully screened by virtue of an SELEX technology in the research, and the aptamers have the effect of inhibiting the in vitro activity of the BACE1. The nucleic acid aptamers are used for providing a research basis on development of novel potent and specific BACE1 inhibitors and providing novel methods and concepts to treatment of AD.

The invention belongs to the technical field of polymer, and relates to a preparation method of microgel composite hydrogel, which comprises the following steps: preparing solution containing N-hydroxymethyl, preparing dispersion solution, preparing prepolymerization solution, polymerization and heating and crosslink at high temperature. Acrylamide is adopted as a main monomer, N-methylol acrylamide is used as a functional monomer, the prepared microgel dispersion solution containing the N-hydroxymethl is adopted as a potential crosslink agent, and then the microgel composite hydrogel is prepared with a method of first polymerization and later high-temperature processing and crosslink. The method is free from adopting chemical modifier to obtaining the microgel containing the potential crosslink point, so the preparation process of the microgel composiste hydrogel is simpler, and the mechanical performance of the prepared hydrogel is excellent.

The invention discloses a comprehensive prevention and control technology of a corn waterlogging disaster, wherein soil ridging or compartment ridging regulation and control are utilized. The comprehensive prevention and control technology comprises the following steps: sowing in a wide and narrow row spacing manner during corn sowing, carrying out intertillage ridging or ditching during the five-leaf stage of corn, ditching in wide rows of corn and ridging in narrow rods of corn, or ditching in wide rows on the two sides of a compartment consisting of four or six rows, additionally applying nitrogen-oxygen mixed fertilizer instantly after the corn waterlogging disaster occurs, and spraying spermidine chemical modifier on leaf surfaces at the same time, wherein spraying is carried out once in the morning and night for 2-3 days continuously; other steps are the same as that during normal management, corn is harvested until bracts of corn clusters are dried up, corn grain milk lines disappear, and a black layer appears, namely when grains are completely and physiologically matured. According to the comprehensive prevention and control technology, through comprehensive precontrol advantages of prevention in advance and remedy after the disaster, the root oxygen deficiency after waterlogging can be effectively reduced and retarded, accumulated toxic effect of hazardous substances of soil is reduced, and the root growth and absorption capacity is strengthened, so that the symplastic growth of overground part and root system is promoted, and the yield is improved.

The invention discloses a method for measuring gibberellin in fruits by the aid of a molecularly imprinted electrochemically modified electrode. The gibberellin and methylene blue are mixed and are electrochemically polymerized to form a membrane on the surface of a glassy carbon electrode, and a molecularly imprinted electrochemical sensor is prepared after the gibberellin is eluted. Along with the increase of the quantity of the gibberellin which is marked by dopamine on various recognition sites on the molecular imprinted membrane and is eluted, current of oxidation peaks is greatly reduced, and accordingly the electrochemical analysis method for measuring the trace gibberellin is built. Good linear relation between peak current I and the gibberellin within the concentration range from 2.5X10-8 to 1.05X10-6mol / L is good. The method overcomes various shortcomings such as excessive complexity in the prior art, is high in measuring sensitivity, wide in measuring linear range and low in detection limit, and has an excellent effect in detecting the gibberellin with the concentration of 10-8mol / L in the fruits.

A system for highly sensitive electrochemical detection of trace nitro-aromatic compounds in air, uses a carbon or carbon / gold working electrode with a surface that is modified to increase the electron transfer kinetics of nitro-aromatic compounds. Chemical modifiers of the working electrode surface include amino-aromatic compounds such as aniline and its derivatives. The detection method involves dissolving trace nitro-aromatic compounds in an electrolyte including aprotonic solvents, or dipolar solvents, in the electrochemical cell including a working electrode, a reference electrode and an auxiliary electrode. Voltage is varied across the working electrode and the reference electrode, and an electrical current is measured between the working electrode and the auxiliary electrode. The measured electrical peak current is a sensitive indication of the concentration of the trace compounds. This invention is appropriate for portable, field-testing of trace explosive compounds in air.

The invention relates to and belongs to a potentiometric chemical sensor, in particular to a timolol maleate potentiometric chemical sensor and a preparation method thereof. The preparation method comprises the following steps: (1) carrying out the chemical modification by the periodic scanning electro-polymerization method after pre-processing the surface of the matrix electrode to prepare the chemically modified electrode; (2) preparing a PVC-film sensitive solution by the conventional method with the solvent being tetrahydrofuran, and coating the modified electrode with the PVC sensitive film by the dip-coating method to prepare a chemical sensor (I); (3) preparing the molecularly imprinted polymer (Polymer A) of timolol maleate, and preparing the PVC film (Film II) containing Polymer A; and (4) compounding the Film II onto the PVC sensitive film of the chemical sensor I. The invention can effectively overcome the disadvantages of the existence of internal reference solution electrodes in the prior art, furthermore, the chemical sensor of the invention is significantly superior to the existing ion-selective electrodes in term of the selectivity of the drug (such as propranolol hydrochloride and the like) ions with the molecule with the structures, such as alcohol amine, imido and the like.

The present invention relates to a preparation method for plastic particles filling an anti-aging artificial lawn. The method comprises the following steps of: taking 130 parts by mass of thermoplastic plastics or rubber or a blend thereof, 0.1-5 parts by mass of chemical modifiers and 0.1-5 parts by mass of a stabilizer and uniformly mixing the materials, adding the mixed materials into an extruder to be extruded and granulated at 170-230 DGE C, and obtaining modified plastic particles, wherein the stabilizer comprises a light stabilizer, an antioxidant and a pigment. The preparation method has the beneficial effects that the artificial lawn filled particles have more excellent resilience and antiaging performance; the defect that the plastic particles filling anti-aging artificial lawn are not antiaging is overcome, the service life of the plastic particles is prolonged, the product replacement within a short period is avoided and the maintenance cost of the artificial lawn is lowered.

The invention provides a water-soluble taxol prodrug using polyethylene glycol as a carrier as well as a preparation method and a chemical modifier thereof. The water-soluble taxol prodrug uses polyethylene glycol as the carrier and malic acid as a connecting arm to prepare a branching-type polyethylene glycol derivative containing a plurality of carboxy groups. The derivative is used for decorating taxol, can greatly improve the taxol carrying capability of the polyethylene glycol, and obviously improves the dissolubility of the taxol so that the solubility of the decorated taxol is from 0.1mg / ml to 6.0mg / ml, and the taxol content in the prodrug is from 1 percent to 38 percent. The invention is beneficial to the improvement of medicament performance.

The invention belongs to the field of soil improvement, and particularly relates to a soil leavening agent, which is prepared from the following raw materials in parts by mass: 25 to 28 parts of crushed corn straws, 25 to 28 parts of crushed cotton straws, 20 to 22 parts of edible fungus dregs, 5 to 10 parts of turfy soil, 5 to 8 parts of plant ash and 5 to 8 parts of zeolite powder. The oil leavening agent provided by the invention can improve a soil structure, increase soil aeration and supplement organic matter; by being combined with a chemical modifier commonly used in the prior art, the effect of reducing alkaline and desalting can be realized by ion exchange of sodium ions in the soil, and on the premise of not changing the soil, the saline-alkali soil can be thoroughly modified and can be further used for agricultural production or urban landscaping.

The invention discloses a chemically modified electrode for sensitive detection of doxycycline as well as a preparation method and application thereof. The modified electrode is a glassy carbon electrode with high electrical activity and modified by ZnIn2S4@In2O3@MXene nanocomposite. The invention relates to the field of electroanalytical chemistry and electrochemical sensors. The ZnIn2S4@In2O3@MXene graded tubular heterojunction nanocomposite disclosed by the invention has large specific surface area and high catalytic activity and can increase the enrichment amount of doxycycline in an electrochemical detection medium and improve the measurement sensitivity while effectively accelerating electron transfer and improve the electrochemical response signal; and the composite has the advantages of high selectivity, simplicity and convenience, low price and high stability and is suitable for field detection. The chemically modified electrode prepared by the invention is already successfully applied to the accurate detection of doxycycline in animal-derived food.

A fluid contactor is taught for mixing and reacting of fluids. Mixing is enhanced by providing a suitable residence time and suitable surface area contact by forming eddy flow within the fluid and thereby the formation of vortexes. Such a contactor does not require the use of mechanical mixers. The contact chamber of the present invention can enhance chemical modification by use of chemical modifiers such as ultraviolet lamps, by allowing the positioning of such modifiers adjacent the vortexes.

The invention provides a method for detecting bisphenol A, in particular to the field of electrochemiluminescence detection. The operation procedure comprises the following steps of (1) preparation ofcomposite materials of Ti-based MOFs(MIL-125) fixed terpyridine ruthenium (Ru(bpy)32+); (2) preparation of Ru(bpy)32+@MIL-125 modified on the surface of a glassy carbon (GC) electrode, that is, a chemically modified electrode of Ru(bpy)32+@MIL-125 / GC; and (3) detection of bisphenol A by electrochemiluminescence, wherein the Ru(bpy)32+@MIL-125 / GC electrode is used as a working electrode, the Ag / AgCl electrode is used as a reference electrode, and the platinum electrode is used as an auxiliary electrode, thereby forming a traditional three-electrode system. In the method, the detection range is1.0*10-11mol / L to 1.0*10-6mol / L, and the minimum detection limit is 1.8*10-12mol / L. The method provided by the invention has low cost, high sensitivity and simple operation for detecting bisphenol A.

The invention relates to a method for measuring dopamine by utilizing graphite nano-sheet / Nafion composite film to modify an electrode, belonging to the technical field of electrochemical analysis. The invention adopts cation polymer Nafion as a dispersing agent, disperses graphite nano-sheet with stable property into Nafion solution, coats the dispersing solution on the surface of a glassy carbon electrode in a dripping mode to prepare a chemical modifying electrode, uses a differential pulse voltammetry for phosphate buffer solution containing ascorbic acid, and has good selectivity and high sensitivity to the measurement of dopamine. The method can directly be used for fast electromagnetic measurement of the dopamine and has the advantages of high sensitivity, accuracy and selectivity and the like.

The invention provides a graphene composite which comprises a graphene layer, a prussian blue layer arranged on the graphene layer and nano platinum particles arranged on the prussian blue layer. In the graphene composite, existence of prussian blue enables the nano platinum particles deposited on the prussian blue surface to have a small average particle size so as to give a larger active surface area to a catalyst; moreover, the characteristics of a prussian blue complex are also beneficial for enhancing interaction between Pt and graphene and reducing fall-off of the catalyst on the surface of an electrode so as to improve catalytic stability of the catalyst; furthermore, strong interaction exists between iron ions at the center of the prussian blue and CO, so that toxic adsorption of CO to the Pt catalyst can be reduced to a certain degree and the desorption oxidation process of CO is promoted, and thus, toxicity resistance of the catalyst is obviously improved. Therefore, the graphene composite provided by the invention has higher catalytic activity on catalytic oxidation on methanol and a stronger antitoxic effect.

The invention discloses application of graphite conductive adhesive to prepare a chemically modified electrode or biosensor electrode binder for electrochemical biological sensing detection, wherein, the graphite conductive adhesive comprises the following components by weight percent: 40-60% of an epoxy resin, 20-40% of graphite powder, 10-30% of a diluent and 1.5-3% of an amine curing agent. The graphite conductive adhesive has excellent electrical conductivity, excellent adhesiveness, wide and flat electrochemical window, convenient use, and excellent application prospect in electrochemical biological detection.

The present invention describes a method and apparatus for separating chemical and / or biological samples based on selective ion-molecular interactions in the gas phase. A chemical modifier is added to the drift gas that interacts selectively with a targeted molecule in at least one component of the sample in a drift tube. The component may be impurities and / or interferences in the sample whereby the chemical modifier enhances sample resolution by shifting the components drift times. In addition, reagents can be added to the sample prior to, during, or after ionization to form a complex with selected components in the sample. In addition, one or more internal and / or external standard can also be added to the sample as a calibration for the measurement.