95 results about "Diethylaminoethyl Methacrylate" patented technology

The invention relates to the field of nano technology and discloses a method for preparing SiO2-PDMAEMA nanoparticles having a core-shell structure. The method comprises the following steps of: selecting 2-bromideisobutyryl bromide with a higher initiation activity or a compound represented by a formula (I) as an initiator by using an atom-transfer radical-polymerization method; and during reaction, mixing CuX2 serving as a passivator, a ligand, SiO2 nanoparticles modified by the initiator, a solvent and diethylaminoethyl methacrylate at first and then adding CuX to perform a grafting reaction to obtain the SiO2-PDMAEMA nanoparticles with the core-shell structure. Experiments show that: the prepared SiO2-PDMAEMA nanoparticles have the advantages of controllable particle size, narrow particle size distribution and controllable molecular weight of the polymer PDMAEMA grafted on the surface of SiO2. Moreover, the preparation method provided by the invention has the characteristics of mild reaction conditions, convenience, feasibility and short preparation period and is easy for mass production.

The present invention relates to a preparation method of chloromycetin molecular engram solid-phase extraction small column, belonging to the field of biological engineering technology. Said method includes the following steps: using template molecule chloromycetin, functional monomer N-N-diethylaminoethyl methacrylate and cross-linking agent ethylene glycol dimethacrylate according to the mole ratio of 1:2-8:25 and making them undergo the process of suspension polymerization to obtain chloromycetin molecular engram polymer microsphere; weighing said chloromycetin molecular engram polymer microsphere and filling it into polyprophylene solid-pase extraction small column so as to obtain the invented chloromycetin molecular engram solid-phase extraction small column.

The invention belongs to the technical field of high molecular polymer materials for biomedicine, and discloses an amphiphilic pH-responsive 4 / 6 heteroarm star-shaped copolymer of which the number-average molecular weight is 30000-54000g / mol. The invention also discloses a preparation method of the amphiphilic pH-responsive 4 / 6 heteroarm star-shaped copolymer, which comprises the following steps: mixing epsilon-caprolactone, stannous octoate and low molecular initiator, reacting at 110-140 DEG C for 24-48 hours, performing reduced pressure distillation, precipitating, filtering, and drying to obtain polycaprolactone high molecular initiator; dissolving the polycaprolactone high molecular initiator, 2-diethylaminoethyl methacrylate, hexamethyltriethylenetetramine and copper bromide in toluene, stirring, then adding stannous octoate, and reacting at 60-90 DEG C for 5-12 hours; and adding methoxy polyoxyethylene methacrylate, continuously polymerizing for 5-12 hours, removing a catalyst, filtering, and performing posttreatment on the filtrate to obtain the amphiphilic pH-responsive 4 / 6 heteroarm star-shaped copolymer. The amphiphilic pH-responsive 4 / 6 heteroarm star-shaped copolymer is used for preparation of a micelle system for carrying water insoluble medicaments.

The invention provides a polymer, a preparation method and a poly-N-isopropylacrylamide europium complex micelle, and belongs to the field of europoium complexes. The polymer is methoxypolyethylene glycol-poly-N-isopropylacrylamide-polymethylacrylic acid N,N-diethylaminoethyl, the structural formula is shown as the formula I, and the abbreviate formula is mPEG23-PNIPAM-PDEA, wherein mPEG23 is methoxypolyethylene glycol, PNIPAM is poly-N-isopropylacrylamide, and PDEA is polymethylacrylic acid N,N-diethylaminoethyl. The structural formula of the europium complex micelle is shown as the formula II. Due to the fact that the polymer (mPEG23-PNIPAM-PDEA) has good thermosensitivity and pH sensibility, the polymer can be used as a chemical conveying carrier after being prepared into the europium complex micelle.

The invention relates to the field of food separation technology, specifically to a preparation method for a rebaudiodside A molecularly-imprinted polymer. According to the invention, rebaudiodside A is used as a template molecule, diethylaminoethyl methacrylate is used as a functional monomer, ethylene glycol dimethacrylate is used as a cross-linking agent, a mixed solvent of N,N'-dimethyl formamide and tetrahydrofuran is used as a pore forming agent, azodiisobutyronitrile is used as an initiator, and the rebaudiodside A molecularly-imprinted polymer is prepared through dispersion and uniform mixing of the above-mentioned substances, introduction of nitrogen for removal of oxygen, thermal-initiation polymerization, Soxhlet extraction and drying. The invention has the following beneficial effects: the prepared molecularly-imprinted polymer has good adsorption selectivity and great adsorption capacity on rebaudiodside A in a water-containing mobile phase and can be used as an adsorption and separation material for separating and purifying rebaudiodside A in stevia rebaudiana extract.

The invention discloses a binder used for pigment printing of textiles and a preparation method thereof. The binder is prepared by seed emulsion polymerization of fatty alcohol polyoxyethylene ether sodium sulfate, diethylaminoethyl methacrylate, methacryloyloxy ethyl acetoacetate, sodium lauryl sulfate, acrylic acid, acrylic ester, ammonium persulfate and deionized water. The binder is free of formaldehyde or alkylphenol polyoxyethylene and has soft hand-feeling and good soaping fastness.

The invention discloses a water-soluble acrylic resin coating and a preparation method thereof. The preparation method comprises the following steps of weighting hydroxyethyl methacrylate, chlorinated polyethylene, methyl methacrylate, butyl methacrylate, monobutyl maleate, butyl acrylate, styrene, diethylaminoethyl methacrylate, azobisisobutyronitrile, methylbenzene, a crosslinking agent, hexahydrophthalic anhydride, methanol 1 and a plasticizer; adding hydroxyethyl methacrylate, chlorinated polyethylene, methyl methacrylate and butyl methacrylate into a reaction kettle; stirring while heating; then, adding styrene, methanol and azobisisobutyronitrile; recovering methanol; adding monobutyl maleate and methylbenzene; adding the rest raw materials, and grinding to obtain the water-soluble acrylic resin coating. The water-soluble acrylic resin coating has the viscosity of 60-80s, the adhesive force of 1-2 grades and the hardness of 0.55-0.75; the impact strength is 45-65kg / cm, the tack-free time is 30-50min, and the solid drying time is 4-6h; a coated film has no bubbling and winkling phenomena after being soaked in a saturated calcium hydroxide solution for 7-14d and has no falling and bubbling phenomena after being soaked in water for 15-30d; the water-soluble acrylic resin coating has the flexibility of 2-4mm and can be widely produced and used for continuously replacing the traditional material.

The present invention is directed to the use of a combination of a polymeric chelant and coagulant to treat metal containing wastewater. More particularly, the invention is directed at removing copper from CMP wastewater. The composition includes a combination of (a) a polymeric chelant derived from a polyamine selected from the group consisting of diethylenetriamine (DETA), triethylenetetraamine (TETA), tertraethylenepentaamine (TEPA), poly[vinylamine], and branched or linear poly[ethylenimine] (PEI); and (b) a water soluble or dispersible copolymer of a tannin and a cationic monomer selected from the group consisting of methyl chloride or dimethyl sulfate quaternary salt of dimethyl aminoethyl acrylate, diethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminopropyl methacrylamide, dimethylaminopropyl acrylamide, and diallyl dimethyl ammonium chloride.

The invention belongs to the fields of biological materials and nano materials, and relates to a mixed micelle with hypoxia and pH double responsiveness and a preparation method of the mixed micelle.The method comprises the following specific steps: a product of an esterification reaction of carboxylated monomethoxypolyethylene glycol and p-hydroxyazobenzene is used as a macroinitiator to initiate atom transfer radical polymerization of a cyclocaprolactone monomer; ring-opening polymerization cyclohexanolide is used as a macroinitiator to initiate atom transfer radical polymerization of a N,N-diethylaminoethyl methacrylate monomer; and two block copolymers are used to prepare the mixed micelle by a solvent evaporation method according to a certain charge ratio. The mixed micelle preparedby the method provided by the invention has the hypoxia and pH dual responsiveness, and broad application prospects in biomedical applications, drug carriers, targeted therapies and the like; and thepreparation method provided by the invention is simple and easy to implement, the raw materials can be industrially produced, and the method has very good promotion and application value.

The invention discloses a soil water-retaining agent and a preparation method thereof, which belong to the field of crops production. The method adopts chitosan as a first layer network structure, sodium ethylene sulfonate, 2-diethylaminoethyl methacrylate and the like are added to a network structure, the moisture can be better locked, the respiratory action of microorganisms in the soil is always present, and can assist the water-retaining agent for long-term moisture preservation; in the first layer network structure, arbuscular mycorrhizal fungi and cyanobacteria are simultaneously added and mixed, a microbial respiratory responsive additive and carbon dioxide are acted, soil activity is activated, the microbe growth is stimulated, and nutrient can be provided; zeolite is modified by cetyl pyridine bromide, the water-absorption activity is increased, and moisture adsorption quantity is increased, at the same time, the mechanical properties of the gel are enhanced and not lost by the impact of external force, and the water retention performance is stably exerted. The soil water-retaining agent solves the problems of insufficient nutrition to farmland and short water-retention time efficiency of the current water-retaining agents.

An oxidized peat fulvic acid composite water retaining agent is prepared from, by mass, 50-60 parts of oxidized peat fulvic acid, 15-25 parts of cationic compound monomers, 8-15 parts of anionic compound monomers, 0.1-0.8 part of a cross-linking agent and 0.4-3.8 parts of initiator. The oxidized peat fulvic acid is prepared from, by mass, 1 part of oxidized peat, 0.05-0.20 part of an oxidizing agent and 2.95-8 parts of industrial pure water. The cationic compound monomer is one of (3-methacrylamidipropyl) trimethyl ammonium chloride, methyl acrylyl ethyl trimethyl ammonium iodide, (3-acrylamidopropyl)trimethyl ammonium chloride, dimethylaminoethyl methacrylate, N,N-dimethylaminoethyl acrylate and 2-diethylaminoethyl methacrylate. The cross-linking agent is composed of, by mass, 5-8 parts of N,N-methylene bisacrylamide and 0.5-3 parts of glycerine or ethylene glycol diglycidyl ether or dimethylol urea. The initiator is prepared from, by mass, 5 parts of ammonium persulfate and 1-4 parts of potassium sulfite.

The invention belongs to the technical field of high-molecular polymer materials for biological medicines, and particularly relates to a pH response type star-like amphiphilic polymer and a preparation method thereof. The invention provides the pH response type star-like amphiphilic polymer of a chemical structure of formula (I) as shown in the specification, in the formula, adamantane which is non-toxic and odor-free, good in biocompatibility and unique in spatial configuration is adopted as a core of the pH response type star-like amphiphilic polymer, polycaprolactone which is good in biocompatibility and biodegradability is adopted as a hydrophobic block, a poly-alkaline type polymer, namely polymethylacrylic acid lignocaine ethyl ester, is adopted as a pH response block, and polymethylacrylic acid methoxy polyethylene glycol ester is adopted as a hydrophilic block. The invention further provides a preparation method of the pH response type star-like amphiphilic polymer. The preparation method is simple to operate, gentle in reaction condition, easy in product purification process and controllable in structure. The pH response type star-like amphiphilic polymer has a molecular weight distribution coefficient less than 1.3, and a product yield as high as 85% or greater.

The invention belongs to the technical field of oil absorption materials and environmental protection, and particularly relates to a preparation method of an intelligent pH response type melamine foamoil-water separation material. The preparation method comprises the following steps: firstly, carrying out silanization modification on melamine foam by adopting aminopropyltrimethoxysilane; and withcopper sulfate as a catalyst, carrying out a copper amine oxidation-reduction reaction in an aqueous solution to generate free radicals which initiate graft polymerization of diethylaminoethyl methacrylate so as to prepare the pH-responsive melamine foam oil-water separation material. According to the invention, the melamine foam with high internal porosity and large absorption capacity is selected as a matrix, and free radical graft polymerization is initiated through a simple copper-ammonium oxidation-reduction two-step method to prepare the oil-water separation foam material containing a pH response layer; the material has switchable wettability in different pH environments; and foam modification process is simple, and industrial production is easy to realize.