37results about How to "Wide molecular weight range" patented technology

The present invention is directed to nonwoven webs and articles comprising nanofibers. The nanofibers are made from a polymer having a glass transition temperature about 25 C. The nanofibers, having a diameter of less than 1 micron, may comprise a significant number of the fibers in one layer of the web contained by the article. Preferably, the nanofibers are produced in a melt film fibrillation process. Articles include diapers, training pants, adult incontinence pads, catamenials products such as feminine care pads and pantiliners, tampons, personal cleansing articles, personal care articles, and personal care wipes including baby wipes, facial wipes, and feminine wipes.

The invention discloses a water-based electrode binding agent and a preparation method thereof. According to the water-based electrode binding agent, an emulsion polymerization system is adopted, and a reversible addition-fragmentation chain transfer free-radical polymerization technology is used for preparing butyl acrylate / styrene / methyl acrylate block copolymer latex which is used as the electrode binding agent. A preparation process has the advantages of energy saving and environment protection; compared with a traditional binding agent polyvinylidene fluoride, the water-based electrode binding agent has the advantages of low price, simple process, no pollution and the like; the discharge specific capacity of a used electrode in a lithium iron phosphate electrode can reach 153.4mAh / g, and the discharge specific capacity in a graphite electrode can reach 358.6mAh / g; and therefore, the water-based electrode binding agent has great application prospects.

The present invention is directed to articles comprising nanofibers. The nanofibers, having a diameter of less than 1 micron, may comprise a significant number of the fibers in one layer of the web contained by the article. Preferably, the nanofibers are produced in a melt film fibrillation process. The articles include diapers, training pants, adult incontinence pads, catamenials products such as feminine care pads and pantiliners, tampons, personal cleansing articles, personal care articles, and personal care wipes including baby wipes, facial wipes, and feminine wipes.

The invention discloses a continuous synthesis method of polyether. The continuous synthesis method comprises the following steps: adding low molecular weight polyether into a reaction kettle, adding a DMC (Dimethyl Carbonate) catalyst, ventilating an alkyleneoxide compound after nitrogen gas displacement, and carrying out induced reaction, wherein the DMC catalyst is indicated to be induced when pressure is obviously lowered and temperature is quickly increased; and then, with small molecule alcohol as an initiator, continuously adding the alkyleneoxide compound into the reaction kettle after mixing with the initiator, and continuously adding the DMC catalyst by an external circulating pipeline to continuously synthesize out the polyether product. According to the continuous synthesis method disclosed by the invention, the applied initiator is low in price, and the obtained polyether product is wide in molecular weight range, high in construction ratio and narrow in molecular weight distribution..

The invention discloses a method for preparing a thermal conduction enhanced phase change energy storage wood based on photothermal response. The method mainly comprises the following steps: (1) carboxylating graphene oxide to obtain carboxylated graphene oxide, performing conjugate grafting on the carboxylated graphene oxide by using ammoniated multi-arm polyethylene glycol, controlling the amount of polyethylene glycol grafted on the surface of graphene, and blending the polyethylene glycol-grafted graphene with polyethylene glycol to prepare a phase change energy storage material; and (2) preprocessing wood with a low-concentration sodium hydroxide and sodium sulfite solution, preparing a solution by using maleic anhydride as esterification agent and acetone as a solvent, impregnating the preprocessed wood in the solution, allowing the above obtained graphene / polyethylene glycol phase change energy storage suspension to infiltrate the wood by a vacuum pressurizing full-cell process,and regulating a multidimensional interpenetrating network structure to obtain the thermal conduction enhanced phase change energy storage wood. A firm amide bond can be formed between graphene and polyethylene glycol to ensure the stability of the phase change system.

A novel method for building complex three-dimensional scaffolds for biomimetic applications such as in vitro organ growth, using a gelatin / sugar / water gel, ultraviolet radiation, and heat or enzyme is described. The method produces gelatin-sugar hydrogels demonstrating greater thermal stability, mechanical strength, and resistance to enzymatic degradation. The invention also provides a means to assemble the gelatin sugar hydrogel films into complex three-dimensional structures (scaffolds). To account for the native biochemical factors present in natural scaffolds, methods of conjugating such factors to the gelatin-sugar hydrogel are described. These scaffolds can then be applied for tissue culturing and organ growth. The present invention also describes a system and apparatus for constructing these complex three-dimensional scaffolds by taking advantage of the physical and chemical properties of the gelatin-sugar hydrogel.

The invention discloses a carbon fiber modified with a crystalized crosslinkable polyaryletherketone sizing agent and a preparation method of the carbon fiber and belongs to technical field of carbonfiber surface treatment. The preparation method includes subjecting double-fluorine monomer containing aniline side groups and bisphenol monomers to polymerization, or modifying crystalized polyaryletherketone, so as to obtain soluble amorphous polyaryletherketone polymer, and blocking thermotropic crosslinking groups to two terminals of the polymer; meanwhile, subjecting the carbon fiber to surface electrochemical reduction, and grafting the crosslinking groups which are the same as the mentioned to the surface of the carbon fiber; further, drafting the carbon fiber which is subjected to thesurface electrochemical reduction to pass through a sizing agent solution to size the carbon fiber, and performing acidification to recover the crystallinity of the polyaryletherketone sizing agent; finally, finishing the carbon fiber. The carbon fiber can be used for preparing a composite material, the composite material is subjected to high-heat treatment, so that the crosslinking reaction is initiated, the crystallinity of the polyaryletherketone polymer is improved, the sizing agent is allowed to have a crystalline texture and can form a chemical bonding with the surface of the carbon fiber, and further, the interference shear strength is improved, and the composite material has high temperature resistance and corrosion resistance performance.

The invention discloses a segmented copolymer flexibilizer as well as a preparation method and application thereof. According to the preparation method disclosed by the invention, poly(methacrylic acid-b-methyl methacrylate-b-n-butyl acrylate) segmented copolymer flexibilizers with different monomer compositions and different molecular weights are prepared by using an emulsion polymerization system and a reversible addition fragmentation chain transfer free radical polymerization technology. The segmented copolymer flexibilizer is blended with polycarbonate to prepare an alloy. The process of the preparation method disclosed by the invention is simple in equipment, environment-friendly, energy-saving and easy to operate. The segmented copolymer flexibilizer is prepared by using an amphiphilic macromolecular reversible addition fragmentation chain transfer reagent, has the double functions of a chain transfer reagent and an emulsifier, realizes good control on monomer polymerization, and avoids the use of the traditional emulsifier; the reaction has no polymerization inhibition period, and has a high reaction speed and a high final conversion rate, colloidal particle growth during the process is stable, and the molecular weight range of the product is wide.

A novel method for building complex three-dimensional scaffolds for biomimetic applications such as in vitro organ growth, using a gelatin / sugar / water gel, ultraviolet radiation, and heat or enzyme is described. The method produces gelatin-sugar hydrogels demonstrating greater thermal stability, mechanical strength, and resistance to enzymatic degradation. The invention also provides a means to assemble the gelatin sugar hydrogel films into complex three-dimensional structures (scaffolds). To account for the native biochemical factors present in natural scaffolds, methods of conjugating such factors to the gelatin-sugar hydrogel are described. These scaffolds can then be applied for tissue culturing and organ growth. The present invention also describes a system and apparatus for constructing these complex three-dimensional scaffolds by taking advantage of the physical and chemical properties of the gelatin-sugar hydrogel.

The invention discloses a method for rapidly detecting pseudomonas aeruginosa in a textile. The method comprises designing a set of LAMP specific primers based on the pseudomonas aeruginosa specific ETA conserved sequence as target gene sequence, carrying out enrichment culture on a textile sample, carrying out product LAMP amplification to obtain white precipitates, comparing and observing the precipitates to determine a result or observing a result through a turbidity meter, wherein when the sample reaction turbidity value is less than 0.1, the sample result is negative and when the sample reaction turbidity value is greater than or equal to 0.1, the sample result is positive, separating the positive sample enrichment fluid inoculation flat plate, picking a typical or suspicious colony on the flat plate, and carrying out fast identification through a MALDI-TOF-MS technology to obtain an identification result. The method has the advantages of simple operation, fastness, high efficiency, strong specificity, high sensitivity and convenient and visual observation.

The invention discloses a method for rapidly detecting salmonella in textiles. The method comprises the following steps: I, enriching bacteria of a sample; II,conducting an LAMP test; II, conducting MALDI-TOF-MS technical identification; and IV, reporting a result. With the application of the method, a detection duration is greatly shortened, a negative detection result can be obtained within 1 day and a positive detection result can be obtained within 3 days. The method, through the scientific combination of the LAMP technology and the MALDI-TOF-MS, is simple and economic, and meanwhile, the method has the characteristic of being high in throughput; the method is applicable to instant and in-situ detection; and when the in-situ detection is positive, samples can be purposefully increased and inspected in laboratory, so that the method, when supervised, is high in reaction speed and strongly targeted, and moreover, the method is time-saving.

The invention discloses an extraction method and application of a polygonatum cyrtonema extract. The extraction method of the polygonatum cyrtonema extract comprises the following steps: extracting polygonatum cyrtonema rhizome powder in water to obtain an extract; and carrying out vacuum concentration on the extract to obtain the polygonatum cyrtonema extract. The polygonatum cyrtonema extract extracted by taking water as an extraction solvent mainly contains polysaccharide and also contains a small amount of protein and polyphenol; the polygonatum cyrtonema extract extracted by the extraction method disclosed by the invention has multiple effects including a moisturizing effect, an inflammation resisting effect, an oxidation resisting effect and the like when applied to cosmetics. The extraction method of the polygonatum cyrtonema extract is easy to operate and mild in conditions; and the obtained polygonatum cyrtonema extract has good stability and applicability when applied to cosmetics and has good industrial application prospects.

The present invention provides a process for producing an N-vinylamide polymer in an efficient manner by an aqueous solution polymerization method in which a gel-like polymer having an excellent handling property can be produced, and a polymerization time can be shortened. The process for producing an N-vinylamide polymer by subjecting a monomer component comprising N-vinylamide to aqueous solution polymerization according to the present invention comprises the step of polymerizing the monomer component comprising N-vinylamide in the presence of an inorganic salt, which inorganic salt is present in an amount of not less than 7% by mass based on water in a uniform aqueous solution comprising the monomer component at a concentration not more than a saturated solution concentration thereof as measured at a polymerization initiation temperature.

The invention provides a petroleum sodium sulfonate composition as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing 5 to 95weight percent of a fraction 1 of which the average molecular weight is 252 to 312, 5 to 95 weight percent of a fraction 2 of which the average molecular weight is 313 to 395 and 0 to 50 weight percent of a fraction 3 of which the average molecular weight is 396 to 490 according to 100 percent of the total weight of a mixed material, thus obtaining the mixed material; adding a diluent into the mixed material, thus obtaining a diluted product; carrying out sulfonation treatment on the diluted product by adopting an SO3 gas, thus obtaining a sulfonated product, wherein the diluent is prepared from one or a combination of several alcohols of which the carbon chain lengths are C3 to C10, and the dosage of the diluent is 0.1 to 10 percent of the weight of the mixed material; then neutralizing petroleum sulfonic acid in the sulfonated product by adopting a sodium hydroxide aqueous solution until the pH (Potential of Hydrogen) value of a system is 7 to 11, thus obtaining the petroleum sodiumsulfonate composition.

The present invention provides a process for producing an N-vinylamide polymer in an efficient manner by an aqueous solution polymerization method in which a gel-like polymer having an excellent handling property can be produced, and a polymerization time can be shortened. The process for producing an N-vinylamide polymer by subjecting a monomer component comprising N-vinylamide to aqueous solution polymerization according to the present invention comprises the step of polymerizing the monomer component comprising N-vinylamide in the presence of an inorganic salt, which inorganic salt is present in an amount of not less than 7% by mass based on water in a uniform aqueous solution comprising the monomer component at a concentration not more than a saturated solution concentration thereof as measured at a polymerization initiation temperature.

The invention discloses a preparation method of polyacrylamide specially used for agricultural fertilizer. The method comprises the following steps: placing polypropylene in a polymerization reactor,directly stirring under the normal pressure to polymerize the polypropylene, maintaining the constant temperature of polymerization to be within a range of 160-270 DEG C, and controlling the heat preservation time to be 0.5-5h; then, adding a catalyst-phosphoric acid into the material in a way of one-time addition or slow addition, and continuously performing the polymerization in the polymerization reactor under the normal pressure, wherein the constant temperature of the polymerization is within a range of 160-230 DEG C, and the heat preservation time is 0.5-5h; finally, carrying out alkaline hydrolysis. The mass ratio of the polypropylene to the catalyst-phosphoric acid is equal to 100 to (1-35), and the phosphoric acid is 85% phosphoric acid. The method provides by the invention guarantees the fluidity of the material, avoids the problem of material agglomeration, and can realize large-scale production. The phosphate ions in the catalyst are nutrient element needed for the growth of crops; the catalyst does not need to be separated, so that the processes such as washing are omitted, the production process is simplified, and the manufacturing cost is lowered.

The invention discloses a triblock copolymer tough resin latex and a preparation method thereof. According to the resin latex, polyacrylate (PA) is used as a soft segment, and a random copolymer of styrene (St) and methyl methacrylate (MMA) is used as a hard segment. The method is simple in preparation process, environment-friendly and energy-saving, the adopted amphiphilic macromolecular RAFT reagent has the dual functions of a transfer reagent and an emulsifier, good control over monomer polymerization is achieved, and use of a traditional micromolecular emulsifier is avoided; the prepared polymer is high in elasticity modulus and elongation at break, and the thermoplastic material integrates toughness and rigidity and has great application value.

The invention discloses a Polygonatum sibiricum polysaccharide column chromatography separation method and extraction method. The Polygonatum sibiricum polysaccharide column chromatography separation method comprises the following step: carrying out column chromatography separation on Polygonatum sibiricum polysaccharides with a macroporous adsorbent resin, wherein the sample loading quantity is 10ml per 100-200ml column volume, the concentration of the Polygonatum sibiricum polysaccharides in the loaded liquor is 3.5-4.5mg / ml; the eluting agent is a 10-50 wt% ethanol water solution, the consumption of the eluting agent is 80-150ml per 100-200ml column volume, and the eluting flow rate is 1-2ml / minute. The Polygonatum sibiricum polysaccharide column chromatography separation method and extraction method are simple to operate, and have the advantages of favorable repetitiveness and high product purity; the separated Polygonatum sibiricum polysaccharides are varied and not limited to oligosaccharides; and thus, the Polygonatum sibiricum polysaccharide column chromatography separation method and extraction method are more suitable for industrial production.

The invention discloses a preparation method of a high-efficiency agricultural fertilizer, comprising the following steps: placing polypropylene into a polymerization reactor, directly stirring at normal pressure to polymerize polypropylene at the constant temperature of 160-270 DEG C for the holding time of 0.5-5 hours; adding a catalyst phosphoric acid into the material by a one-time addition orslow addition mode, continuously polymerizing in the polymerization reactor at normal pressure at the constant temperature of 160-230 DEG C for the holding time of 0.5-5 hours; and finally carrying out alkaline hydrolysis. The mass ratio of polypropylene to the catalyst phosphoric acid is 100:1-35, and the content of phosphoric acid is 85%. By the method, fluidity of the material can guaranteed,the caking problem of the material is avoided, and large-scale production can be realized. Phosphate ion in the catalyst is a nutrient element essential to growth of crops. There is no need to separate the catalyst, the washing process is saved, the production process is simplified, and the manufacturing cost is reduced.

The invention provides an anticancer agent adsorbing sheet body that exhibits a sufficient effect of adsorbing and retaining highly toxic chemical agents such as anticancer agents, and that further improves safety for health care professionals in medical environments. The anticancer agent adsorbing sheet body 1A comprises, in a laminated form, a drug solution absorbing layer 10a that absorbs a drug solution containing a drug molecule of an anticancer agent, a drug solution-permeating section 20 situated on a first surface 18 side of the drug solution absorbing layer, that causes a drug solution to permeate to the drug solution absorbing layer side, and a permeation preventing section 30 situated on the second surface 19 side of the drug solution absorbing layer, that prevents leakage of the drug solution from the drug solution absorbing layer side, wherein the drug solution absorbing layer comprises an activated carbon-containing sheet member 11 that contains adsorptive activated carbon, the adsorptive activated carbon has a physical property with a mean pore diameter of 1.7 to 5 nm, the drug solution-permeating section is a resin fiber fabric member, and the permeation preventing section is a resin sheet member.

The invention discloses a block copolymer toughening agent and its preparation method and application. The invention adopts an emulsion polymerization system and uses a reversible addition-fragmentation chain transfer radical polymerization technology to prepare poly( Methacrylic acid-b-methyl methacrylate-b-n-butyl acrylate) block copolymer toughener. The block copolymer toughening agent is blended with polycarbonate to prepare an alloy. The process equipment of the invention is simple, the process is environment-friendly, energy-saving and easy to operate. The preparation of block copolymer toughening agent adopts amphiphilic macromolecule reversible addition fragmentation chain transfer agent, which has dual functions of chain transfer agent and emulsifier, which not only realizes good control of monomer polymerization, but also avoids the traditional emulsification The use of the agent; the reaction has no hindered polymerization period, the reaction speed is fast and the final conversion rate is high, the growth of the colloidal particles is stable during the process, and the product molecular weight range is wide.

The invention provides a petroleum sulfonic acid sodium salt composition, a preparation method and application thereof. The preparation method comprises taking the total weight of the mixture as 100%, 5wt%-95wt% fraction 1 with an average molecular weight of 252-312, 5wt%-95wt% fraction 2 with an average molecular weight of 313-395 and 0-50wt% % average molecular weight is that fraction 3 of 396-490 is mixed homogeneously, obtains mixture; Add diluent in mixture, obtain the product after dilution, adopt SO 3 The gas is subjected to sulfonation treatment on the diluted product to obtain a product after sulfonation treatment; wherein, the diluent includes one or a combination of alcohols with a carbon chain length of C3-C10, and the amount is the weight of the mixture 0.1%-10% of 0.1%-10%; and then use sodium hydroxide aqueous solution to neutralize the petroleum sulfonic acid in the product after sulfonation treatment until the pH value of the system is 7-10 to obtain the petroleum sulfonic acid sodium salt composition.

The invention discloses a carbon fiber modified by a crystalline crosslinkable polyaryletherketone sizing agent and a preparation method thereof, belonging to the technical field of carbon fiber surface treatment. The present invention utilizes difluoro monomers containing aniline side groups and bisphenol monomers to polymerize, or to modify crystalline polyaryletherketones to obtain soluble amorphous polyaryletherketone polymers, and then heat-induced crosslinking The group is capped at both ends of the polymer; at the same time, the surface of the carbon fiber is electrochemically reduced, and the same cross-linking group as mentioned above is grafted to the surface of the carbon fiber; then the carbon fiber whose surface has been treated by electrochemical reduction is drawn through the sizing agent The solution is sized and acidified to restore the crystallinity of the polyaryletherketone sizing agent; finally, after the carbon fiber is processed and formed to prepare the composite material, a high-temperature heat treatment is carried out to initiate the crosslinking reaction, and to improve the crystallization degree of the polyaryletherketone polymer, so that the sizing The agent has a crystalline structure, and at the same time forms a chemical bond connection with the surface of the carbon fiber, improves the interfacial shear strength, and is resistant to high temperature and corrosion.

The invention discloses a method for preparing a thermal conduction enhanced phase change energy storage wood based on photothermal response. The method mainly comprises the following steps: (1) carboxylating graphene oxide to obtain carboxylated graphene oxide, performing conjugate grafting on the carboxylated graphene oxide by using ammoniated multi-arm polyethylene glycol, controlling the amount of polyethylene glycol grafted on the surface of graphene, and blending the polyethylene glycol-grafted graphene with polyethylene glycol to prepare a phase change energy storage material; and (2) preprocessing wood with a low-concentration sodium hydroxide and sodium sulfite solution, preparing a solution by using maleic anhydride as esterification agent and acetone as a solvent, impregnating the preprocessed wood in the solution, allowing the above obtained graphene / polyethylene glycol phase change energy storage suspension to infiltrate the wood by a vacuum pressurizing full-cell process,and regulating a multidimensional interpenetrating network structure to obtain the thermal conduction enhanced phase change energy storage wood. A firm amide bond can be formed between graphene and polyethylene glycol to ensure the stability of the phase change system.

The invention discloses a water-based electrode bonding agent for a sulfur positive pole and a preparing method. The water-based electrode bonding agent for the sulfur positive pole is butyl acrylate / styrene segmented copolymer rubber latex, the structure expression formula is R-AAn1-b-Stn2-b-BAn3-b-Stn4-b-BAn5-b-Stn6-X, the segmented copolymer is stably dispersed in water in a particle mode to form the rubber latex, and the average diameter of particles is about 98 nm to 147 nm. The water-based bonding agent prepared with the method applied to the sulfur positive pole has the advantages of being high in specific capacity and good in cycle performance, the specific discharging capacity can be 935.7 mAh / g after the water-based electrode bonding agent is cycled 50 times at 0.2 C multiplying power, the bonding agent is good in preparing controllability, the preparing technology is simple, the process is environmentally friendly, energy is saved, and raw materials are low in cost and easy to obtain.

The invention discloses a new method for identifying the pearl protein component. The new method comprises the steps that pearl protein is subjected to SDS-PAGE, after electrophoresis is conducted, gel is dyed with coomassie brilliant blue, decoloration is conducted, spectrum scanning is conducted, and a strip is analyzed; protein gel obtained after color development is cut off, washed to be clean, dried, pretreated with dithiothreitol, treated with iodoacetamide and then treated with trypsin, and finally peptide is separated and extracted with liquid chromatogram for use; the peptide is subjected to mass spectrometric detection, and a mass spectrum is obtained; the mass spectrum is subjected to database analysis. The method has the advantages that operation is easy, rapid and efficient, acarbohydrate chain in the pearl protein can be removed, the analysis difficulty can be lowered, the component of soluble protein in pearl can be analyzed and identified, and the theoretical basis isprovided for further deep research and comprehensive development of the pearl protein.

A method of extracting kiwi fruit proteinase is disclosed. The invention employs 0.1-0.5% green tea polyphenols solution as precipitator, the volume ratio of green tea polyphenols solution with kiwi fruit juice is 0.8-1.1:1. Compared with the prior arts, the invention has merit of high yield, simple process, short period, low cost, innocuity etc, which is suitable for industrialized production of kiwi fruit proteinase.

The invention discloses a preparing method of acrylonitrile-styrene-acrylic ester (ASA) tough resin based on a segmented copolymer. An emulsion polymerization system is used, a reversible addition breakage chain transferring free radical polymerization technology is used, a poly(styrene-acrylonitrile) / poly butyl acrylate segmented copolymer toughening modification agent is synthesized, and by blending and injection with a poly(styrene-acrylonitrile) base body, the ASA tough resin based on segmented copolymer toughening modification is obtained. During a preparing process, environment is protected, energy is saved, amphiphilic macromolecules are used for reversible addition of a breakage chain transferring reagent, the double functions of the chain transferring reagent and an emulsifying agent are achieved, good control over monomer polymerization is achieved, using of traditional emulsifying agents is avoided, polymerization speed is high, the polymer molecular weight range is wide, the monomer combining range is wide, the product mechanical property is good, and high application prospect is achieved.