16 results about "Thioglycolic acid" patented technology

The application relates to a low-smoke halogen-free flame-retardant plastic and a preparation method thereof, and belongs to the technical field of flame-retardant high polymer materials. The components of the flame-retardant plastic are as follows: 12-17 wt% of magnesium hydroxide superfine powder, 4.5-6.2 wt% of modified flame retardant, 5-7 wt% of toughening agent, 0.9-1.2 wt% of lubricant, 0.3-0.4 wt% of antioxidant, and the rest is PBT resin; the modified flame retardant is prepared by reacting pentaerythritol and phosphorus oxychloride to form a cage-shaped phosphate ester containing a hydroxyl group, then acryloyl chloride is esterified with the hydroxyl group of the cage-shaped phosphate ester to form a monoester intermediate, and finally the thiol group of pentaerythritol tetramercaptoacetate is click-added to the double bond of the monoester intermediate; the modified flame retardant interacts with the magnesium hydroxide, a stable hollow carbon net is formed in the flame-retardant process, the smoke particles have a multilayer adsorption and filtration effect, the release of smoke is reduced, and the smoke density is greatly reduced.

The application provides a thioglycolic acid modified carbon quantum dot, which is prepared by the following method: (1) preparing a carbon quantum dot solution by using Dicranopteris dichotoma leaves and / or Ricinus communis leaves as raw materials; (2) adding thioglycolic acid into the carbon quantum dot solution obtained in the step (1) so that the concentration of the thioglycolic acid is 0.5mmol-5mmol; after being sufficiently dissolved and mixed, the reaction is carried out at 100-140 DEG C for 1-6 hours to obtain the thioglycolic acid modified carbon quantum dot. The application finds that under suitable conditions, the inhibition effect of the thioglycolic acid modified carbon quantum dot on Ralstonia solanacearum is significantly enhanced, and the minimum inhibitory concentration and the bactericidal concentration are obviously reduced.

The invention discloses a method for recovering elemental sulfur from oxygen pressure leaching residues, which comprises the following steps: firstly, dissociating elemental sulfur from mineral substances by adopting a grinding process, and then adopting N, N '-diethyldithiocarbamate and neutral oil as collecting agents and sodium thioglycolate as an inhibitor in flotation operation; the N, N-diethyldithiocarbamate and neutral oil synergistic collecting system is adopted in flotation operation, under the organic inhibition effect of bifunctional sodium thioglycollate, the number of times of concentration can be reduced, the grade of the sulfur concentrate can be improved, high-grade sulfur concentrate is successfully obtained through roughing and concentration of the flotation column, the grade can reach 90% or above, and the recovery rate can reach 80% or above. In addition, the method does not need heating or roasting, the used medicament is acid-resistant, the filtrate can be recycled, and the method has the advantages of simple process, low energy consumption, high resource recovery rate and the like, is suitable for efficient recovery of elemental sulfur in the oxygen pressure leaching process waste residues of zinc, copper, nickel and the like, and has a wide application prospect.

To provide a culture medium suitable for culturing and detecting lactic acid bacteria causing deterioration of a beer-like sparkling beverage, and to provide a method for detecting beer-spoilage lactic acid bacteria of the beer-like sparkling beverage by using the culture medium.SOLUTION: The culture medium and the beer-like sparkling beverage are used for detecting beer-spoilage lactic acid bacteria, and the beer-spoilage lactic acid bacteria are detected by inoculating the beer-spoilage lactic acid bacteria into the culture medium and culturing the beer-spoilage lactic acid bacteria in the culture medium, and Lactobacillus paracoinoides or Lactobacillus lindneri is detected by inoculating the beer-like sparkling beverage into the culture medium and culturing the beer-spoilage lactic acid bacteria in the culture medium. K1, To provide a method for detecting beer-spoilage lactic acid bacteria.SELECTED DRAWING: None

This invention discloses a cerium copper selenide (CCuSe2) compound thin film, its preparation method, and its applications. The preparation method includes: S1, mixing a copper source and a cerium source to obtain a cerium copper powder mixture; S2, adding thioglycolic acid and ethanolamine to the cerium copper powder mixture, heating and stirring until the cerium copper powder mixture is completely dissolved to obtain a mixed solution; S3, cooling the mixed solution to room temperature, adding a selenium source to the mixed solution, heating and stirring, reacting until the selenium source is completely dissolved, centrifuging, and obtaining the supernatant as the cerium copper selenide precursor solution; S4, spin-coating and sintering the cerium copper selenide precursor solution to obtain a cerium copper selenide pre-film; S5, subjecting the cerium copper selenide pre-film to high-temperature annealing, and cooling to obtain a cerium copper selenide thin film. This invention marks the first experimental synthesis of the CeCuSe2 compound, which matches the theoretically calculated CeCuSe2 crystal structure. The optical and electrical properties of CeCuSe2 materials were also investigated, confirming that cerium copper selenide thin films can be applied to solar cells and photocatalysis.

The invention relates to the technical field of battery materials, in particular to an organic pretreatment method in lithium sulfide ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometer) impurity test. The method mainly comprises the following steps: (1) weighing a lithium sulfide solid sample, and adding ultrapure water for dissolving to obtain a sample treatment solution; (2) adding chloroacetic acid into the sample treatment liquid, and converting the sulfur element in the lithium sulfide into the organic matter to obtain an intermediate liquid 1; (3) adding ammonia water into the intermediate solution 1 to adjust the pH value to 7-8, and converting excessive chloroacetic acid in the intermediate solution 1 and mercaptoacetic acid generated by the reaction into thiodiacetic acid to obtain an intermediate solution 2; and (4) adding hydrochloric acid into the intermediate solution 2 to adjust the pH value to 1-2, and then adding an organic solvent for extraction to obtain a water phase solution which is a solution to be detected. After extraction, the concentration of the S element in a water phase solution is extremely low, the experimental process is safe and controllable, and no chemical reagent influencing the test of the content of metal element impurities is added.

The invention relates to a nanoparticle for use as a drug carrier and the synthesis method of this nanoparticle. In the invention, magnesium / aluminium (Mg / AI) mucoadhesive thiolated layered double hydroxide (nLDHT) nanoparticles are thiolated with L-cysteine and / or thioglycolic acid and / or 2-iminothiolane hydrochloride and / or glutathione and / or N-acetyl cysteine and / or 3-mercaptopropionic acid and / or 6- mercaptohexanoic acid. Thus, nLDHT interacts with the mucin on the surface of the targeted mucosal tissue for a longer period of time and acts with fewer side effects in the target tissues.

The invention relates to the technical field of biosensing and medical instruments, in particular to an organic electrochemical transistor sensor and a preparation method and application thereof. According to the specific technical scheme, the surface of a grid electrode is sequentially modified with a mercaptoacetic acid self-assembly layer, an anti-clostridium difficile toxin B (TcdB) antibody (such as E3), ethanolamine and bovine serum albumin (BSA), and a biological function interface with high specific recognition and strong non-specific adsorption resistance is constructed. The preparation method is simple and stable. The obtained sensor has extremely high detection sensitivity (fg / mL level), good selectivity and a wide linear range on TcdB, can complete detection within a few minutes, is particularly suitable for rapid and accurate detection of TcdB in a complex biological sample, and has a wide application prospect in the field of bedside diagnosis of clostridium difficile infection.

The invention belongs to the field of drug delivery and oral preparations, and provides an 8-O-acetyl harpagide nano-composition and a preparation method thereof.The 8-O-acetyl harpagide-soybean lecithin compound is used as a nuclear phase, lactobionic acid and thioglycolic acid dual-modified chitosan and sodium tripolyphosphate are subjected to ionic crosslinking to form a shell layer, and the 8-O-acetyl harpagide nano-composition is prepared. Compared with the prior art, the freeze-dried powder has the advantages of high loading capacity, high solid content, low viscosity and wide processing window, small particle size, low polydispersity index and stable nano dispersion are obtained, ethanol residue and water content of the freeze-dried powder are reduced, freeze-dried storage stability, redissolution redispersibility and oral release and absorption performance are improved, and the freeze-dried powder is suitable for large-scale production. The method is suitable for the development of oral preparations for preventing the acetaminophen-induced liver injury.

This invention relates to the field of flame-retardant materials, specifically to a composite functional material based on antimony trioxide and its preparation method, comprising: an antimony trioxide core; a MOF (Metal-Oxide-Factory) interlayer; and a phosphorus-containing organosilicon shell. This invention successfully prepares a novel composite functional material with stable structure and excellent performance by constructing a three-layer core-shell structure of "antimony trioxide core - MOF interlayer - phosphorus-containing organosilicon shell" and employing a stepwise preparation strategy of "thioglycolic acid surface modification - in-situ growth of MOFs - free radical polymerization grafting." This material exhibits excellent technical effects in terms of flame retardant performance, compatibility, and mechanical property retention, providing a new approach and technical method for the development of high-performance flame-retardant functional materials.

The application belongs to the technical field of foamed ballast pad, and particularly relates to a polyurethane microporous foamed ballast pad and a preparation method thereof, which comprises the following components: an ISO component: aromatic diisocyanate, polytetrahydrofuran ether diol, polyether polyol and a retarder; a POLY component: polytetrahydrofuran ether diol, polymer polyol, 4,4'-methylenebis(2-chloroaniline), a heat-sensitive catalyst, dimethyl tin dimercaptoacetate, an alcohol amine catalyst, an amine catalyst, a foaming agent and a uniform foaming agent; the weight ratio of the ISO component and the POLY component is 100:90-205; the application can effectively improve the fatigue resistance and reduce the production cost.

The invention belongs to the technical field of preparation of catalytic materials, and particularly discloses a method for rapidly preparing a high-performance PtCo catalyst with low cost based on Joule heat, which comprises the following steps: (1) dissolving a chloroplatinic acid solution, a Co precursor, activated carbon and sodium thioglycolate in a mixed solvent composed of deionized water and ethanol, after ultrasonic dispersion, mixing and stirring to obtain a precursor solution; (2) drying the precursor solution prepared in the step (1) under the assistance of ultrasonic waves by adopting a rotary evaporation method, and then performing vacuum drying to obtain precursor powder; (3) grinding the precursor powder prepared in the step (2), mixing the ground precursor powder in carbon paper, and performing carbon thermal reduction reaction through Joule heat temperature rise to obtain mixed powder; and (4) carrying out acid pickling, filtering, washing and vacuum drying on the mixed powder prepared in the step (3) to prepare the PtCo catalyst. The preparation method is simple, short in preparation time and low in cost; the prepared catalyst is small in particle size, uniform in dispersion and high in ORR performance.

This invention provides a method for preparing a K2CrO4-regulated SnO2 composite electron transport layer, comprising: S1 dissolving urea in deionized water, adding thioglycolic acid, hydrochloric acid solution and SnCl2·2H2O to the deionized water to obtain a SnO2 precursor solution; S2 immersing a pretreated conductive glass substrate in the diluted SnO2 precursor solution for a first heating reaction to obtain a deposited SnO2 conductive glass substrate; S3 adding a K2CrO4 aqueous solution to the deposited SnO2 conductive glass substrate for a second heating reaction to obtain a deposited SnO2 / K2CrO4 conductive glass substrate; and S4 washing and annealing the deposited SnO2 / K2CrO4 conductive glass substrate to form a K2CrO4-regulated SnO2 electron transport layer. Introducing K2CrO4 as an oxidizing additive during the chemical bath deposition process allows for the synergistic regulation of the crystallization process, electrical properties, and band structure of SnO2ETL. This results in a K2CrO4-regulated SnO2 electron transport layer with low trap density, high conductivity, and ideal energy level arrangement, significantly improving the photoelectric conversion efficiency of perovskite solar cells and enhancing their operational stability and lifespan.

The invention discloses an oil-resistant and wear-resistant fluororubber sealing ring and a processing technology thereof. The invention relates to the technical field of rubber sealing rings. The oil-resistant and wear-resistant fluororubber sealing ring comprises the following main components in parts by mass: 70-80 parts of fluororubber, 10-20 parts of modified composite filler, 1-2 parts of an accelerant, 4-6 parts of a modified vulcanizing agent and 1-3 parts of an anti-aging agent, according to the fluororubber ring, the multiwalled carbon nanotubes are compounded with silicon dioxide, the wear resistance of the fluororubber ring is remarkably improved by utilizing the unique molecular structure of SiO2 and the relatively high bond energy of Si-O bonds as well as the multiwalled carbon nanotubes serving as carbon materials and having the effect of a rubber reinforcing agent, and on the basis, thioglycollic acid is used for further modification, so that the wear resistance of the fluororubber ring is improved, and the wear resistance of the fluororubber ring is improved. Meanwhile, the silane coupling agent is used for cooperating with the modified vulcanizing agent, so that the wear resistance and the stability of the fluororubber sealing ring are remarkably improved.

This invention discloses a GKW-TK-Chr conjugate targeting activated hepatic stellate cells, its preparation method, and its application, relating to the field of biomedical technology. The method for preparing this GKW-TK-Chr conjugate, formed by coupling juglansin to the targeting peptide GKWLEQYSRNVP via a thioglycolic acid bond, includes the following steps: S1, synthesizing the intermediate TK-Chr; S2, synthesizing the compound GKW-TK-Chr: combining the intermediate TK-Chr with the peptide... GKWLEQYSRNVP reacts in the presence of a condensing agent to obtain a GKW-TK-Chr conjugate; the GKW-TK-Chr conjugate is used in the preparation of drugs for the prevention and / or treatment of liver fibrosis; the compound GKW-TK-Chr is formed by conjugating apigenin with the targeting peptide GKWLEQYSRNVP via a thioglycolic acid bond, and this conjugate is used in the preparation of drugs for the prevention and / or treatment of liver fibrosis. The conjugate of the present invention can achieve active targeted delivery to activated hepatic stellate cells, thereby improving the therapeutic effect of drugs for liver fibrosis.

The invention relates to the technical field of corrosion inhibition passivators, and discloses a phosphate corrosion inhibition passivator and a preparation method thereof.The preparation method comprises the steps that butanebis (thioglycolate imidazoline) and bis [2-(methacryloyloxy) ethyl] phosphate are subjected to a polymerization reaction, then the product and benzyl chloride are subjected to a quaternization reaction, and the phosphate corrosion inhibition passivator is obtained; the corrosion inhibition passivator contains phosphoric acid, imidazoline quaternary ammonium salt and sulfur atoms, and forms strong phosphorylation reaction, coordination and the like with the steel surface, so that the corrosion inhibition passivator forms a layer of tight and firm polymer passivation protection film on the steel surface, the contact between a hydrochloric acid corrosion medium and steel is inhibited, and the corrosion inhibition rate and the corrosion resistance are remarkably improved; the method has better practical application in the aspects of oilfield produced water treatment, metal equipment passivation and corrosion prevention, cleaning agents and the like.