44results about How to "Not hydrolyzed" patented technology

The invention relates to a method for preparing chemically crosslinked photonic crystal hydrogel with an adjustable color. The method comprises the following steps: (1) dissolving N-isopropylacrylamide, N-hydroxyethyl acrylamide, a cross-linking agent and an emulsifier into deionized water, stirring, warming and keeping warm under the condition at 20-25 DEG C in a nitrogen condition, and then adding an initiator to continue to react for 1-4 hours, and dialyzing, so as to obtain a colloidal crystal hydrogel solution; (2) concentrating the obtained colloidal crystal hydrogel solution, standing at room temperature, adjusting the pH by adopting an NaOH solution, adding a crosslinking agent, evenly mixing, centrifuging, and standing at room temperature after taking, so as to obtain the chemically crosslinked photonic crystal hydrogel. The method is simple in process and low in cost, and the prepared photonic crystal hydrogel has thermosensibility. In addition, the obtained photonic crystal hydrogel is good in stability, and free of hydrolysis, the problem that nano hydrogel is easily decomposed because of ester hydrolysis in 2-hydroxy ethyl acrylate is solved, and the defects of the photonic crystal hydrogel in application are compensated.

The invention discloses hydrolysis-resistant corrosion-resistant polyurethane synthetic leather, which is obtained by infiltrating a modified polyurethane emulsion into a non-woven fabric by a wet manufacturing process; specifically, firstly 2-butene-1,4-diol and heptamethyltrisiloxane are used for a hydrosilylation addition reaction to obtain a silanol compound with the structure shown as the formula A; next, isophorone diisocyanate, polypropylene glycol and the silanol compound A are subjected to block copolymerization to obtain a prepolymer with the structure shown as the formula B; under the action of a chain extender DMPA, further polymerization is performed to obtain a condensate C; organosilicone with low surface energy is embedded in the synthesis of polyurethane; then a carboxylated carbon nanotube is introduced by a hydrogen bonding mode to form a superhydrophobic protective layer, so that the hydrolysis resistance and corrosion resistance of the polyurethane synthetic leather are greatly improved, thereby realizing good application prospects.

The invention belongs to the field of synthesis of polymer monomers, and specifically relates to a synthesis method of siloxane-substituted maleimide which can be used as an active coupling agent of glass fibers for greatly improving the combination force of the glass fibers and organic resins. The traditional manufacturing method of such coupling agent is a two-step method and comprises the steps of enabling amino alkyl siloxane and maleic anhydride to react to generate maleamic acid alkyl siloxane; synthesizing the siloxane-substituted maleimide through amic acid under the effect of a dehydrating agent. The invention provides a novel synthesis method for preparing a target product through raw materials that are alkali metal salt of maleimide and halogen alkyl siloxane by an one-step mode in the presence of a polar aprotic solvent, aims at overcoming the shortages that the traditional synthesis method is cockamamie in process and the dehydrating easily leads to hydrolyzing of siloxane. The method, by being compared with the traditional synthesis method, has the advantages that the after-treatment is convenient, the siloxane is avoided electrolyzing, and the product is high in purity.

The invention relates to a pretreatment method for chemical industry wastewater with high salt, high ammonia nitrogen, high organic solvent and high toxicity. According to the technical scheme, the chemical industry wastewater is subjected to coagulating reaction sedimentation treatment, microelectrolysis reaction treatment, Fenton reaction treatment and MVR evaporation treatment in sequence. By means of the pretreatment method, the content of fine suspended matter and low-boiling-point organic matter in the chemical industry wastewater can be effectively reduced, the phenomenon that foam is formed in the operation process of an MVR evaporator is reduced, and thus normal operation of the MVR evaporator is guaranteed; as the chemical industry wastewater is subjected to microelectrolysis reaction treatment and Fenton reaction treatment, organic nitrogen can be converted into ammonia nitrogen before the chemical industry wastewater is subjected to MVR evaporation treatment, the existing form of nitrogen in the wastewater is controlled, most ammonia nitrogen is crystallized out of the system in the form of ammonium chloride, and thus the ammonia nitrogen load in subsequent condensate biochemical treatment is reduced. Compared with a conventional treatment process, the pretreatment method has an unexpected treatment effect on the chemical industry wastewater, and the operation stability of the whole system is guaranteed.

The invention provides a non-ionic epoxy resin emulsifier. The emulsifier has a structure shown as formula ER-1 or ER-2. The invention also provides a preparation method for the non-ionic epoxy resinemulsifier. The invention provides a non-ionic epoxy emulsion, the preparation method and application thereof. The non-ionic epoxy emulsion provided by the invention has small diameter and high stability. A test in the manner of centrifugal separation for 30 minutes at 10000rpm proves that no layering bleeding phenomenon occurs, the change on grain size and epoxide equivalent is small and the protecting property for metal welding area is excellent after the non-ionic epoxy emulsion is stored for 6 months under room temperature.

The invention relates to a xanthate cation dual-modified straw fiber printing and dyeing wastewater treatment agent which is prepared by extracting straw fiber by taking straw as a raw material, and sequentially modifying the straw fiber by using an anion esterifying agent and a cationic etherifying agent, wherein the anion esterifying agent is carbon disulfide; the cationic etherifying agent is 3-chlorine-2-hydroxypropyl trimethylammonium chloride. In addition to an excellent decoloration effect, the dual-modified straw fiber in the xanthate cation dual-modified straw fiber printing and dyeing wastewater treatment agent is hard to decompose in a water body, relatively good in water solubility resistance, hard to gelatinize even at 60 DEG C, applicable to certain acid-base environments, hard to hydrolyze and good in stability.

The invention discloses a high-hydrolysis-resistance anti-sticking backing adhesive used for an aluminum plastic composite tag and preparation of the adhesive. The adhesive comprises a component A anda component B, wherein the component A comprises polyester polyol, modified epoxide resin, hydroxy acrylic resin, a chain extender, a catalyst and a solvent; and the component B comprises an initiator and an isocyanate curing agent. The adhesive disclosed by the invention is particularly applicable to the adhesion of an aluminum foil or an aluminum coating and a PET thin film; the adhesive is high in adhesive strength to an aluminum plastic composite material and has good acid and alkaline resistance and damp-heat aging resistance, and high back adhesion resistance exists between adhesive layers and between an adhesive layer and aluminum respectively when the adhesive disclosed by the invention is applied; and after an etching technology of the aluminum plastic composite tag, the tag cannot be destroyed by back adhesion even if unrolling or rolling.

The invention relates to a measurement method of total saponins in health food, and particularly relates to a measurement method of total saponins in health food using propolis as a raw material. The measurement method provided by the invention comprises a standard curve making process, a sample treatment process, a test liquid column chromatography isolation process, a color developing process and a total saponins calculating process. In the standard curve making process, a standard curve is obtained by using an absorbance value and a mass of ginsenoside as curves; in the sample treatment process, liquid to be tested is obtained by taking 0.3g of the health food using the propolis as the raw material; in the test liquid column chromatography isolation process, column chromatography isolation is carried out on the liquid to be tested by using a chromatographic column, so as to obtain an evaporation pan with the liquid to be tested which is evaporated to be dry; in the color developing process, the absorbance value of the liquid to be tested is obtained; and in the total saponins calculating process, the content of the total saponins in the health food using the propolis as the raw material can be obtained. The measurement method provided by the invention has the advantages of simple extraction method, high recovery rate, good accuracy, simplicity, convenience and rapidness.

The invention discloses a composite water-treatment coagulant prepared from high-iron gibbsite and a preparation method thereof. The composite water-treatment coagulant is an aluminum chloride molten iron treatment coagulant, aluminum sulfate molten iron treatment coagulant or polyaluminum chloride molten iron treatment coagulant, which is respectively prepared from high-iron gibbsite, technical hydrochloric acid and water, or high-iron gibbsite, technical hydrochloric acid, water and calcium aluminate powder, or high-iron gibbsite, commercial sulfuric acid and water. The invention also discloses a preparation method of the composite water-treatment coagulant prepared from high-iron gibbsite. The composite water-treatment coagulant has the advantages of wide raw material sources, high iron content, high stability, wide water treatment range, favorable turbidity removal effect, simple preparation method, no need of roasting in the production process, no wastewater or waste gas emission and no environmental pollution.

The invention provides an adriamycin nanoparticle with the particle size controllable. The adriamycin nanoparticle is formed by taking polyethylene glycol vitamin E succinate (TPGS) as a core and wrapping the core with polyethylene glycol-adriamycin and poly(isobutene-alt-maleic anhydride)-modified beta-cyclodextrin through self-assembly. The invention further provides a preparation method of the adriamycin nanoparticle. Compared with a traditional nanoparticle prepared through a chemical bond forming and rupturing method, the adriamycin nanoparticle is controllable in particle size, simple in preparation process, mild in reaction condition and capable of easily obtaining the raw materials and has the good biological safety and tissue compatibility.

The invention provides a medical cold compress paste. The medical cold compress paste comprises a front face layer and a back lining layer, wherein the front face layer is used for cooling, and mainlyprepared from a cooling substance raw material, and the cooling substance raw material is prepared from, by mass, 50-100 parts of purified water, 20-50 parts of a humectant and 30-60 parts of a thickening agent; the back lining layer is prepared from a non-woven fabric and a polyethylene film, and the non-woven fabric and the polyethylene film are bonded to form the back lining layer; the front face layer is applied on the back lining layer. Further, the cooling substance raw material comprises 10-20 parts of carrageenan. The medical cold compress paste has the advantages that the medical cold compress paste can perform physical pyretolysis, cold compress physiotherapy and specific body surface part cooling to improve the cooling effect, and the preparation of the medical cold compress paste is convenient and low in production cost. The medical cold compress paste also has a good cooling effect on the physical pyretolysis of closed soft tissue of the human body.

The invention discloses a fast leaching method for a copper-cobalt alloy. The fast leaching method for the copper-cobalt alloy comprises the following steps of (1) preparing a sulfuric acid solution with the concentration being 1 to 6mol/L, and adding ferric sulfate into the sulfuric acid solution until the ferric ion concentration reaches to 25 to 40g/L; (2) adding copper-cobalt alloy powder withthe diameter being 50 to 200mum into a mixed solution in the step (1) according to the liquid-solid ratio being 10 to 15:1, stirring and reacting; (3) when the concentration of Fe3+ in a solution tobe reacted is lower than 8g/L, stopping stirring, standing, guiding the solution separated after standing out into the other container, feeding oxygen into the guided-out solution until the concentration of Fe3+ in the solution reaches to 20 to 25g/l, re-pouring, and then continuously stirring; and (4) repeating the step (3) until the alloy is completely leached. Compared with a traditional technology, the fast leaching method for the copper-cobalt alloy provided by the invention is simple in process, fast in leaching speed, low in cost and free of pollution.