14results about How to "Rapid hydrolysis" patented technology

The invention discloses a thiazolinone acrylic acid silane ester self-polishing antifouling resin and a preparation method and application of the thiazolinone acrylic acid silane ester self-polishing antifouling resin. The preparation method of the thiazolinone acrylic acid silane ester self-polishing antifouling resin mainly comprises the following steps: in a nitrogen environment, adding an initiator, the preparation method comprises the following steps: carrying out random free radical polymerization reaction on thiazolinone methacrylate, methyl methacrylate, ethyl acrylate, triisopropyl silicon-based methacrylate and phenyl dimethyl silicon-based methacrylate by taking azodiisobutyronitrile and benzoyl peroxide as initiators to synthesize the photoinitiator. Wherein the thiazolinone methacrylate monomer is prepared by grafting double bonds on 5-chloro-2-benzothiazolinone and methacryloyl chloride through a substitution reaction, then grafting hydroxyl on the 5-chloro-2-benzothiazolinone and mercaptoethanol through a mercapto-alkene click reaction and finally carrying out a substitution reaction on the 5-chloro-2-benzothiazolinone and methacryloyl chloride. According to the invention, the coating still has good surface self-renewal capability even in a static environment so as to inhibit the adhesion of large fouling organisms.

The invention discloses a cubilose peptide with ACE inhibitory activity and a preparation method and application thereof, the cubilose peptide with the ACE inhibitory activity is prepared through enzymolysis, meanwhile, LC-MS / MS analysis is performed on peptides in enzymatic hydrolysate, a peptide fragment with potential ACE inhibitory activity is screened out in combination with a bioinformatics means, and the obtained peptide fragment has high ACE inhibitory activity through synthesis verification. The bird's nest ACE inhibitory peptide disclosed by the invention has a good application prospect in functional foods or health-care products and food-borne medicines.

The invention discloses a method for promoting degradation of penicillin antibiotics in a water body. The method comprises the following steps: S1, detecting water quality; s2, medium adjustment; s3, carrying out catalytic degradation; s4, precipitation reaction; medium adjustment is performed on the water body to be treated by using calcium ions and organic matters, so that an example state in the water body to be treated is good, the calcium ions can be coordinated with carbonyl and carboxyl in penicillin molecules, a hydrolyzed reaction intermediate is stabilized, the hydrolysis rate of penicillin antibiotics is increased, and the yield of penicillin antibiotics is increased. The characteristic functional groups such as amino and sulfydryl in the biological metabolism organic matter can also serve as strong nucleophilic reagents to promote rapid hydrolysis of penicillin antibiotics, and meanwhile, through specific setting of the method, it can be avoided that calcium ions and biological organic metabolism media cause secondary pollution to the to-be-treated water body before degradation.

The invention discloses environment-friendly authigenic acid as well as a preparation method and a use method thereof, and belongs to the technical field of oilfield chemistry, the environment-friendly authigenic acid comprises an acid generator composition and a prepared liquid aqueous solution, the acid generator composition is prepared from the following raw material components in parts by weight: 30 to 70 parts of deionized water, 20 to 30 parts of ethyl lactate, 10 to 15 parts of methyl lactate, 5 to 10 parts of trimethyl citrate, 5 to 10 parts of N-methylene chitosan phosphate, 2 to 5 parts of chitosan oligosaccharide and 3 to 5 parts of sodium tripolyphosphate. The prepared aqueous solution contains hexadecyl trimethyl ammonium bromide. The acid generator composition and the prepared solution aqueous solution are separated from each other before acidification construction, and are directly pumped into a well after being mixed according to a preset proportion in the acidification construction process. The acid generator composition is stable in performance before being mixed with a prepared aqueous solution, is not easy to oxidize and hydrolyze, can quickly generate acid after being mixed, and has a very good acidification effect after being used on site.

This invention discloses a foamed SiO2 enzyme array and its application in the preparation of diglyceride edible oil, belonging to the field of oleochemical technology. This invention prepares a hydrophobic foamed SiO2 carrier (MCF-C8), and loads lipases ANL, NE, and CALB separately using a physical adsorption method to prepare three functionally specific enzyme arrays. Then, a dual-coupling reaction strategy of "hydrolysis-esterification" and "glycerolysis-esterification" is constructed. ANL@MCF-C8 catalyzes the moderate hydrolysis of vegetable oil, or NE@MCF-C8 catalyzes the glycerolysis of vegetable oil, to obtain a primary diglyceride mixture. The byproduct fatty acids produced in the reaction are recovered and esterified with glycerol under the catalysis of CALB@MCF-C8 to obtain a secondary diglyceride mixture. After purification, an edible oil product with a diglyceride content of 40%~82% and a 1,3-diglyceride content of 90% is obtained. This invention achieves efficient recovery and utilization of byproduct fatty acids, improves product yield, and the enzyme array has strong stability, is easy to separate and recover, and can be reused, effectively reducing production costs.

The present invention relates to a dual MOF fiber membrane for rapid degradation of chemical warfare agent simulants, a preparation method and an application thereof, wherein the chemical composition of the composite fiber membrane is PAN / UIO-66-NH2 / MIL-101(Cr). Electrospinning technology is combined with PDA chemistry, and UIO-66-NH2 and MIL-101(Cr) are in situ assembled on a PAN nanofiber membrane substrate through PDA mediation to form a PAN / UIO-66-NH2 / MIL-101(Cr) composite nanofiber membrane. The PAN / UIO-66-NH2 / MIL-101(Cr) composite fiber membrane DMNP and CEES of the present invention exhibit excellent catalytic and removal properties, and DMNP is completely hydrolyzed in a NEM buffer system in a very short time, while CEES is quickly and effectively captured through physical adsorption / chemical binding, thereby achieving rapid detoxification of two different chemical warfare agent simulants.

This invention discloses a pH-responsive, self-separating, fully biodegradable lunchbox material and its preparation method, belonging to the field of biodegradable lunchbox technology. The pH-responsive, self-separating, fully biodegradable lunchbox material comprises: a starch base layer; a polylactic acid (PLA) barrier layer; and a dynamic covalent bond interface layer with a thickness of 20-50 μm located between the starch base layer and the PLA barrier layer. The dynamic covalent bond interface layer is formed by dynamic cross-linking of hydroxyl groups in starch molecules with carboxyl groups at the ends of PLA chains through borate ester bonds (B–O), wherein boric acid serves as the cross-linking medium, and the cross-linking density gradually increases from 0.3 mol / kg on the starch base layer side to 0.5 mol / kg on the PLA barrier layer side. This pH-responsive, self-separating, fully biodegradable lunchbox material helps to achieve high sealing performance during its service life, rapid self-separation after disposal, and visualization of the degradation process.

The invention discloses superfine TiO2 powder and a preparation method thereof, and relates to the technical field of titanium dioxide, the preparation method comprises the following steps: adding TiCl4 into deionized water to prepare a TiCl4 solution; adding a modified dispersant into deionized water to prepare a modified dispersant solution; adding a TiCl4 solution into the modified dispersant solution, and carrying out heat preservation hydrolysis to obtain a metatitanic acid solution; naturally cooling and aging the metatitanic acid solution, and filtering to obtain a metatitanic acid filter cake; putting the metatitanic acid filter cake into a sagger, sintering at high temperature, and crushing to obtain the superfine TiO2 powder, and finally, the superfine TiO2 powder with uniform particle size, good dispersity and high sphericity can be obtained.

The application discloses a preparation method of an air absorption composite material with high adsorption capacity, belongs to the field of adsorption material preparation, and aims at solving the technical problem that the adsorption capacity and structural stability of the air absorption composite material in the prior art need to be further improved, and specifically comprises the following steps: stirring hybrid sol, epoxy-based silane grafted UiO-66 and modified polyether amine curing agent in a reaction kettle, heating the reaction kettle to 25-35 DEG C, and keeping the temperature and stirring for 30-60 min; and obtaining air absorption composite slurry through post-treatment; the hybrid sol, the epoxy-based silane grafted UiO-66 and the modified polyether amine curing agent are blended, then an organic-inorganic interpenetrating network is formed through epoxy-amine ring-opening addition curing, and the air absorption composite material with high adsorption capacity is obtained through segmented temperature rising activation.

This invention relates to the field of functional lipid preparation technology, specifically to an enzymatic enrichment method for high-purity microalgal glycerol glycolipids and its preparation. This invention provides an enzymatic enrichment method for high-purity microalgal glycerol glycolipids and its preparation, utilizing the substrate specificity of Candida antarctica lipase B, which selectively hydrolyzes triglycerides and phospholipids while retaining and enriching the indigestible glycerol glycolipid components. This maximizes the retention of glycerol glycolipids, resulting in high-purity microalgal glycerol glycolipid products. This provides a method for the efficient enrichment of microalgal glycerol glycolipids that is mild, environmentally friendly, simple, and yields high purity.

The invention discloses a rural black water harmless and recycling system and method based on microbial enhancement, and relates to the technical field of black water treatment. The treatment system adopts a multi-grid black water treatment tank structure, the multi-grid black water treatment tank structure at least comprises a first treatment grid, a second treatment grid and a third treatment grid, the first treatment grid is a black water pre-fermentation tank, the second treatment grid is a harmless treatment tank, and the third treatment grid is a liquid fertilizer storage tank; the second treatment grid is communicated with the third treatment grid; adding a fermentation inoculant and a spherical biological filler into the black water pre-fermentation tank; adding a spherical biological filler into the harmless treatment tank; black water is treated by the first treatment grid, the second treatment grid and the third treatment grid; the fermentation inoculant at least contains phylum firmicalis, bacteroides, proteobacteria, actinomycetes and cyanobacteria, and the abundance of the phylum firmicalis exceeds 50%. According to the method, the harmless and recycling effects of the black water are realized.

The invention discloses a phytase microsphere and a preparation method thereof. According to the phytase microsphere, phytase is embedded in a polymer microsphere; the preparation method comprises the following steps: firstly, preparing a polymer solution, adding a phytase solution into the polymer solution, dropwise adding the obtained mixed solution into an inorganic salt stationary solution, reacting to generate microspheres, adding the microspheres into a cross-linking solution, and carrying out cross-linking reaction to finally obtain the phytase microspheres. The embedding rate of the phytase in the prepared phytase microspheres is 65-85%, the porosity of the phytase microspheres is 30-50%, the activity of the phytase is high, and the phytase can be reused due to the existence of the microsphere carrier. The invention further comprises a method for co-producing inositol and monopotassium phosphate, the phytase microspheres and a potassium phytate solution are subjected to a hydrolysis reaction to obtain hydrolysate, the hydrolysate is separated through simulated moving bed chromatography, and an inositol phase and a monopotassium phosphate phase are obtained; the phytase microspheres have the characteristics of high activity and reusability, so that continuous hydrolysis of potassium phytate is realized.

The invention provides a pretreatment process of satin stretch fabric, which relates to the technical field of printing and dyeing, and comprises the following steps: pretreatment: checking the quality of the fabric, checking the type of the fabric, and cleaning the fabric after checking. According to the invention, chromaticity SS, COD, BOD, arsenic, mercury and other heavy metal ions in the solution are polymerized through the filtering equipment and the two electrified electrodes, hydrogen ions obtain electrons at the cathode to generate hydrogen, in the floating process of the hydrogen, dye molecules decolored by nascent oxygen float to the water surface under the surface tension action of hydrogen bubbles to form scum, the scum is scraped, and the purpose of removing the scum is achieved. Then the solution is guided into a filtering device through a water pump, the filtered solution is guided into a printing and dyeing device through a pipeline by a water outlet of the filtering device, then the same-color dye is added into the filtered solution again, the solution is reused, then the same-color dye is added into the filtered solution, and the dye and the solution are mixed through a stirrer; the solution can be reused, water is saved, and the solution treatment and discharge cost is reduced.

The invention discloses a method for determining the content of glucose in star-shaped PLGA and a pretreatment method, a mixed solution of triethylamine and methanol is adopted as a hydrolysis solvent to perform pretreatment on PLGA or PLA in a polyester compound so as to form a stable hydrolysis solution, and the hydrolysis method is adopted to rapidly extract the bonded glucose in the star-shaped PLGA, so that the content of the glucose in the star-shaped PLGA is determined. Then, HPLC-ELSD is used for detection, and the content of glucose is calculated according to the linear regression equation and the logarithm value of the glucose peak area in the chromatogram of the sample to be detected. The detection method is easy and convenient to operate, rapid in detection and high in sensitivity, quantitative detection of trace glucose in the star-shaped PLGA caused by glucose can be achieved, characterization methods and quality control methods of the quality attribute of the star-shaped PLGA are enriched, research on performance parameters of a sustained and controlled release preparation with the star-shaped PLGA as a carrier is facilitated, and the application prospect is wide. And a reference is provided for evaluating process change and quality difference of the sustained and controlled release preparation.