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

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 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..

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 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 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 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.