718 results about "Thiol" patented technology

The invention relates to the technical field of adsorbents, in particular to modified sodium alginate as well as a preparation method and application thereof. The modified sodium alginate is prepared from the following raw materials: sodium alginate, an activating agent, a sulfhydrylation reagent, a carboxylic acid compound containing unsaturated double bonds and an initiator. Natural polysaccharide sodium alginate is adopted as a raw material, the natural polysaccharide sodium alginate is wide in source, non-toxic and biodegradable, a functional group carboxyl is introduced into sodium alginate through a thiol-ene click reaction, adsorption active sites on the surface of the modified sodium alginate are increased, methylene blue and ciprofloxacin in water can be effectively adsorbed and removed, and the service life of the modified sodium alginate is prolonged. And after multiple times of cyclic adsorption-desorption, relatively good adsorption performance can be maintained.

The invention discloses an SBS modifier and a preparation method and application thereof, an asphalt coating material composition and a preparation method thereof, and a waterproof coiled material. The preparation method of the SBS modifier comprises the following steps: dissolving SBS in a first solvent to obtain an SBS solution; the method comprises the following steps: adding a sulfydryl compound into an SBS solution, and carrying out solution graft polymerization at 50-90 DEG C to obtain graft modified SBS which is grafted with alkyl containing any one of hydroxyl and carboxyl through sulfydryl, or grafted with sulfydryl and grafted with hydroxyl substituted or unsubstituted alkyl through sulfydryl; adding the biomass carbon aerogel and the graft modified SBS into a second solvent according to a mass ratio of 1: (0.5-1.5) to obtain a first mixed solution; adding concentrated sulfuric acid and sodium hypophosphite into the first mixed solution, and reacting at the temperature of 120-130 DEG C to obtain the SBS modifier. According to the preparation method of the SBS modifier, the polarity of the SBS is changed through sulfydryl grafting of the SBS, namely the polarity of the SBS is closer to that of asphalt; and the grafted modified SBS reacts with the biomass carbon aerogel to form a macromolecular compound, so that the performance degradation in the aging process of the coiled material is prevented.

The invention relates to dithiolane modified beta-cyclodextrin, a preparation method thereof and application of the dithiolane modified beta-cyclodextrin as a drug carrier. The method comprises the following steps: carrying out acylation reaction on beta-cyclodextrin and lipoic acid, and modifying different numbers of dithiolane on the beta-cyclodextrin by changing a feeding ratio; the beta-cyclodextrin has a plurality of hydroxyl groups, and the activity of the hydroxyl groups at the C6 position is relatively high. The hydrophobic cavity of the dithiolane-modified beta-cyclodextrin can be loaded with a hydrophobic small-molecule drug, and the hydrophobic small-molecule drug can be loaded into the dithiolane-modified beta-cyclodextrin under the condition of heating reflux to form a nano-drug. The disulfide bond on the surface of the nano-drug and sulfydryl on protein or lipid on the outer side of a cell membrane are subjected to dynamic covalent thiol exchange, so that the nano-drug enters cells through a thiol-mediated cellular uptake way, endosomes and lysosomes can be avoided, the drug is quickly and directly delivered to the cytoplasm, degradation of the drug in the lysosomes is reduced, and the drug delivery efficiency is improved. The utilization rate of small-molecule drugs is improved, side effects are reduced, and better curative effects are achieved.

The invention relates to a method for producing microparticles comprising at least one organic active compound encapsulated by a shell of an organic wall material, the method comprising i. Providing a water-immiscible liquid containing the organic active compound to be encapsulated and at least one first shell-forming compound (SFC1); ii. Emulsifying the water-immiscible liquid obtained in step i. In an aqueous medium to obtain an oil-in-water (o / w) emulsion of the water-immiscible liquid in the aqueous medium; iii. Adding at least one second shell-forming compound (SFC2) to the aqueous medium or to the emulsion obtained in step ii. Prior to or during performing step ii., thereby obtaining an aqueous suspension of the microparticles; wherein the first shell-forming compound (SFC1) or the second shell-forming compound (SFC2) has 1, 2, 3, 4, 5 or 6, in particular 1, 2, 3 or 4, in particular 1, 2 or 3 first reactive groups (RG1) selected from isocyanate groups, isothiocyanate groups, carbonyl halide groups and carboxylic anhydride groups, per molecule, and the other shell-forming compound has 1, 2, 3, 4, 5 or 6, in particular 1, 2, 3 or 4, per molecule, in particular 1, 2 or 3 second reactive groups (RG2) selected from the group consisting of hydroxyl, thiol and primary amino groups, the first shell-forming compound (SFC1) or the second shell-forming compound (SFC2) having only one reactive group and the other shell-forming compound having 1, 2, 3, 4, 5 or 6, in particular 1, 2, 3 or 4, in particular 1, 2 or 3 reactive groups. The invention also relates to microparticles obtainable by this process and to the use thereof.

The present invention discloses a class of imide ring-containing dimercapto monomers, imide ring-containing diene monomers and preparation methods thereof, a light-responsive polyimide material and preparation method thereof, and relates to the technical field of light-driven materials. The present invention uses a dibasic acid anhydride as the basic monomer unit, and prepares a dimercapto monomer containing an imide structure and a monomer containing an imide ring-containing diene monomer by reacting with a monothiol compound and a monoalkyne compound, respectively. The two monomers are subjected to a thiol-alkyne click reaction to finally obtain a high molecular weight polyimide. The polyimide obtained by the present invention has excellent solubility, high tensile strength, good heat resistance and light transmittance; the polyimide material is placed under an ultraviolet lamp for uneven photocrosslinking to quickly obtain a light driver with excellent reversible driving performance.

Disclosed are compositions and methods of making a liquid fertilizer additive solution of polymeric and / or oligomeric heterocyclic nitrogen containing nitrification inhibitors comprising a non-aqueous polar, aprotic organo liquid (NAPAOL) as the reaction medium for the reaction of aldehyde(s) with heterocyclic nitrogen containing nitrification inhibitors that have one or more aldehyde reactive groups selected from the group consisting of a) primary, b) secondary amines, c) amides, d) thiols, e) hydroxyls and f) phenols. Fertilizer compositions are disclosed comprising of a) one or more polymeric and / or oligomeric heterocyclic nitrogen containing nitrification inhibitors adducts from the reaction of aldehyde(s) with heterocyclic nitrogen containing nitrification inhibitors that have one or more aldehyde reactive groups selected from the group consisting of a) primary, b) secondary amines, c) amides, d) thiols, e) hydroxyls and f) phenols b) a non-aqueous organo solvent delivery system (NOSDS), and c) one or more nitrogen sources.

Aqueous acidic binary silver-bismuth alloy electroplating compositions and methods enabling electroplating of silver-rich binary silver-bismuth deposits are disclosed. The aqueous acidic binary silver-bismuth alloy electroplating compositions include a 5-membered heterocyclic nitrogen compound having mercapto functionality, which enables deposition of a silver-rich binary silver-bismuth alloy. The silver-rich silver-bismuth deposit is matte to semi-bright, uniform, and has a low coefficient of friction.

The invention relates to the field of automobile clothing, and discloses an elastic base material for spraying an automobile clothing as well as a preparation method and application thereof, the elastic base material for spraying the automobile clothing comprises a polyurethane prepolymer, modified polydimethylsiloxane, a photoinitiator and an alcohol solvent; the polyurethane prepolymer is prepared from polycarbonate diol, modified fluorine-containing diol, isocyanate, 2, 2-dimethylolbutyric acid and modified nano silicon dioxide as raw materials, the modified fluorine-containing diol and the modified nano silicon dioxide are connected to a polyurethane main chain, pentaerythritol triacrylate is used as an end-capping reagent, and p-hydroxyanisole is used as a polymerization inhibitor, so that the polyurethane prepolymer is prepared. A polyurethane prepolymer and sulfydryl-terminated modified polydimethylsiloxane react under the action of a photoinitiator to form a heavy cross-linked network, so that the elastic base material is endowed with excellent mechanical properties, antifouling properties, thermal stability and flame retardance.

The invention discloses an application of tiopronin wrapped by ROS (reactive oxygen species) response hydrogel in preparation of a medicine for treating osteoarthritis. The ROS response hydrogel is prepared from the following components: tiopronin; the compound group of lecithin and ketal thiol (TK) is TK-NH22, 2 '-(propane-2, 2-diyl bis (sulfanilamide diyl)) diethylamine (sulfanediyl), and the compound group of lecithin and ketal thiol (TK) is TK-NH22, 2'-(propane-2, 2-diyl bis (sulfanilamide diyl)); 12 wt% of methyl cellulose, Na2HPO4. 12H2O and xylitol; according to the hydrogel, controlled release of tiopronin is achieved through an ROS response group, mitochondrial autophagy is enhanced by up-regulating a Bnip3-Pink1-Parkin signal channel, oxidative stress is inhibited, and the progress of osteoarthritis is delayed; compared with the prior art, the invention has the advantages that: the invention discloses an osteoarthritis treatment medicine with the effects of resisting inflammation, relieving pain and inhibiting cartilage degeneration for the first time, and discloses a knee joint intracavity administration route of tiopronin for the first time. Particularly, the tiopronin targeted activation Bnip3-Pink1-Parkin signal channel provided by the invention has a remarkable effect in the aspect of inhibiting the progress of OA, which proves that the medicine has a strong effect on the treatment of osteoarthritis.

The invention belongs to the technical field of perfluoropolyether fluorosilicone oil preparation, and particularly relates to polyvinyl perfluoropolyether fluorosilicone oil and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out ring-opening reaction on tetramethyl tetravinyl cyclotetrasiloxane and cyclosiloxane to prepare polyvinyl polysiloxane, then carrying out reaction on the polyvinyl polysiloxane and perfluoropolyether trimethoxy silane to prepare polyvinyl perfluoropolyether fluorosilicone oil; the modified catalyst, which is prepared by carrying out a reaction on 1, 2, 5-g] isoquinoline and 2-iodopropane to prepare modified organic alkali and then carrying out a reaction on the modified organic alkali, tris (pentafluorophenyl) boron and mercaptan, has relatively high reaction activity, and avoids the difficulty in impurity removal by using a plurality of catalysts; the perfluoropolyether trimethoxy silane, which is prepared by reacting perfluoropolyether alcohol with allyl chloroformate and then carrying out addition with trimethoxy silane, has excellent mechanical properties. The preparation process is relatively simple, addition and use of a fluorine-containing solvent in the reaction process are reduced, and the prepared product contains more vinyl functional groups and has higher crosslinking degree and corrosion resistance.

The invention relates to the technical field of adhesives, in particular to a low-temperature-resistant adhesive and a preparation method thereof.The low-temperature-resistant adhesive is characterized in that waterborne polyurethane is selected as base glue, and carboxylated styrene-butadiene emulsion is added to improve the film forming strength, binding power, stability, flowability and film forming property of the adhesive; trimethanol propane poly (oxypropylene) triether is taken as a center, 2, 2-dimethylolpropionic acid is taken as a hydrophilic chain extender, 2-ethoxyl disulfide containing disulfide bonds is added to improve the self-repairing property, and epoxidized fluorine-containing polysiloxane is taken as an end-capping reagent; according to the present invention, the graphene oxide is adopted as the filler, the graphene oxide is subjected to sulfhydrylation by using the beta-mercaptoethanol, and the epoxidized fluorine-containing polysiloxane is grafted by using the sulfydryl-epoxy reaction, such that the low temperature resistance, the ultraviolet resistance, the water resistance and the adhesion property of the adhesive are substantially improved so as to prolong the service life of the adhesive;

The invention discloses a preparation method of a polythiol compound and an optical resin lens, and belongs to the technical field of new organic materials. The preparation method of the polythiol compound comprises the following steps: mixing polyhydric alcohol as shown in a formula 1, thiourea and hydrochloric acid for reaction, and hydrolyzing to obtain the polythiol compound as shown in a formula 2, wherein the total content of sulfides and polysulfides in the thiourea is less than 0.5%. According to the preparation method, by-products are reduced by controlling the total content of sulfides and polysulfides in the raw material thiourea, so that the long-term storage stability of the chromaticity of the polythiol compound is improved. An optical resin lens prepared from the polythiol compound is stable and qualified in yellow index, low in cost, suitable for large-scale industrial production and capable of meeting increasing social requirements.

In various embodiments, the present invention provides a solvent free 3D printable resin comprising a linear or star-shaped poly(allyl glycidyl ether succinate) ("PAGES") copolymer, and a multi-functional thiol crosslinker, as set forth above. In one or more of these embodiments, the poly(allyl glycidyl ether succinate) ("PAGES") copolymer will be a linear copolymer formed by ring opening copolymerization of allyl glycidyl ether and succinic anhydride, initiated by a mono-or bi- functional initiating alcohol and using a 2,6-di-tert-butyl-4-methylphenoxide (Mg(BHT)2(THF)2) catalyst. These resins may also include at least one suitable photoinitiator and, optionally, a light attenuating agent or photoinhibitor. Advantageously, it has been reported that these resins have a complex viscosity that is suitable for 3D printing (from about 0.5 Pa·s to about 20.0 Pa·s) at room temperature without the need for a solvent or other diluent.

The invention discloses a culture medium composition for garlic gene editing breeding and a preparation method of the culture medium composition, and belongs to the technical field of tissue culture media. Copper peroxide is generated on the surface of modified rice hull biochar, and double bonds of acrylate are attacked by using hydrogen atoms with high nucleophilic property of thiol, so that the garlic gene editing breeding efficiency is improved. Polythioether-acrylate containing thioether bonds is formed, polythioether-acrylate and 2-hydroxyethyl acrylate are copolymerized under the action of an initiator, the ROS-responsive porous rice husk biochar adsorbent containing thioether bonds is obtained, the thioether bonds are broken in a high-reactive oxygen species (ROS) environment, internal supported modified rice husk biochar is exposed, and the adsorbent is used for adsorbing the ROS-responsive porous rice husk biochar adsorbent containing the thioether bonds and the ROS-responsive porous rice husk biochar adsorbent containing the thioether bonds and the ROS-responsive porous rice husk biochar adsorbent containing the thioether bonds and the ROS-responsive porous rice husk biochar. When the antibacterial agent is added into a culture medium, the culture medium has a good growth environment, garlic growth can be promoted, harmful substances such as phenols released in the garlic growth process can be reduced, and bacterium breeding can be avoided.

The invention belongs to the technical field of organic synthesis, and particularly relates to an alkyl pentafluorosulfenyl compound and a preparation method and application thereof.The preparation method comprises the following steps that in the protective gas atmosphere, in a solvent, SF5Cl serves as a pentafluorosulfenyl source, an olefin compound serves as a reaction substrate and a free radical trapping agent, a thiol compound serves as a hydrogen source, and the alkyl pentafluorosulfenyl compound is obtained through a one-step reaction; under the action of an olefin additive, the alkyl pentafluorothio compound is constructed by a one-step method through a visible light-induced free radical process, and the olefin additive is used for inhibiting generation of a pentafluorothio chloride byproduct from a pentafluorothio source and an olefin compound. According to the method disclosed by the invention, a series of alkyl pentafluorosulfenyl compounds can be prepared by only needing olefin double bonds in substrates and selecting more substrates through the reaction, the reaction is simple, the reaction condition is mild, the reaction can be completed under visible light, the reaction time is short, the implementation is easy, and the method is suitable for industrial production. And a method support is provided for further screening the alkyl pentafluorosulfenyl compound with excellent biological activity.

The invention provides a method for detecting dichromate radicals based on surface enhanced Raman spectroscopy, and belongs to the technical field of analytical chemistry. Comprising the following steps: mixing a to-be-detected sample with a sulfydryl-containing compound solution, and adjusting to an acidic condition, so that dichromate Cr (VI) and the sulfydryl-containing compound are subjected to an oxidation-reduction reaction; constructing an SERS substrate, namely preparing a ZnO / Ag heterostructure substrate; mixing the suspension of the ZnO / Ag heterostructure substrate with a reaction system to obtain a mixed solution, so that the ZnO / Ag heterostructure substrate adsorbs a sulfydryl-containing compound and enhances a Raman signal; dropwise adding the mixed solution to the surface of a solid carrier, acquiring a Raman spectrum signal by using a Raman spectrometer, and quantifying the Cr (VI) concentration through the change of signal intensity. The method realizes rapid and high-sensitivity detection of Cr (VI), has strong selectivity and anti-interference capability, and is suitable for detection in the fields of environmental monitoring, food safety, pharmaceutical analysis and the like.

The invention relates to the technical field of synthesis of organic silicon sulfonate, in particular to a preparation method of organic silicon sulfonate with both low-temperature toughening and flame retardance, which adopts a one-pot preparation technology, and solves the problems of stability, compatibility, hygroscopicity and the like of a traditional flame retardant by introducing sulfonate groups and utilizing a surface coating modification technology of a core-shell structure. Specifically, polysiloxane is adopted as an inner core carrier, silicon of a sulfydryl functional group is utilized, a sulfonate group is bonded through a sulfydryl alkene click chemical reaction, the sulfonate group is introduced into a side chain of the inner core carrier, sulfonate can effectively avoid the problem that small-molecule sulfonate is separated out in the inner core, and therefore the stability of the inner core carrier in the using process is guaranteed. Under the action of an initiator and a cross-linking agent, a sulfonate grafted organic silicon core is coated with a soft monomer and a hard monomer polymer, and a formed core-shell structure not only has a flame-retardant effect, but also has a low-temperature toughening effect.

The invention relates to an amorphous form of bismuth-1,2-ethanedithiol (BisEDT). Methods of making amorphous BisEDT and methods of use are also provided.

The invention discloses a preparation method of a walnut shell-based hard carbon negative electrode material. Through optimized plasma treatment reaction conditions, a sulfydryl-containing hard carbon material and a perfluorononyl epoxy compound are subjected to a sulfydryl-epoxy reaction, and the sulfydryl-epoxy reaction and glycidyl trimethyl ammonium chloride are subjected to a sulfydryl-epoxy reaction, so that the hard carbon material containing perfluorononyl and quaternary ammonium salt is obtained, and the performance of the hard carbon negative electrode material can be remarkably improved; by introducing perfluorononyl and quaternary ammonium salt, the surface property of the hard carbon material can be changed, and the hydrophobicity and chemical stability of the hard carbon material are improved, so that the wettability of the battery in an electrolyte is improved, and the interfacial compatibility between an electrode and the electrolyte is improved; the introduction of the functional groups may increase the active sites of the hard carbon material, thereby improving the sodium storage capacity of the hard carbon material. The introduction of perfluorononyl and quaternary ammonium salt may enhance the adsorption capacity of the hard carbon material to sodium ions, thereby improving the initial coulombic efficiency and capacity retention rate of the battery.

The invention belongs to the technical field of insecticides, and particularly relates to a synthetic method of a hexythiazox intermediate, which comprises the following four steps: S1, preparing erythro-1-p-chlorophenyl-2-amino-1-bromo-propane; s2, preparation of the erythro-1-p-chlorophenyl-2-aminopropanethiol, and preparation of the erythro-1-p-chlorophenyl-2-aminopropanethiol; s3, preparation of the trans-1-p-chlorophenyl-2-amino-propyl-O-isopropyl thiocarbonate hydrochloride, and preparation of the trans-1-p-chlorophenyl-2-amino-propyl-O-isopropyl thiocarbonate hydrochloride; and S4, preparation of a hexythiazox intermediate, namely, trans-5-(4-chlorphenyl)-4-methyl thiazolidone. According to the invention, the use of highly toxic carbon disulfide, corrosive chlorosulfonic acid, carcinogenic benzyl chloride and other high-risk reagents is completely abandoned, the operation risk is reduced, no malodorous gas is discharged, the occupational health and safety of operators and the environment are fundamentally guaranteed, meanwhile, the generation of acidic wastewater and sulfur-containing hazardous waste is solved, and the production cost is reduced. And a green chemical atom economy principle is met.

Disclosed is a method of synthesizing a compound selected from the group consisting of C-alkyl glycosides, C-alkenyl glycosides, C-heteroaryl glycosides, Se-glycosides and S-glycosides, the method comprising: a. Reacting a natural unprotected sugar with a 2-chloro-1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 The method comprises the following steps: reacting 1, 3-dimethylimidazoline chloride (DMC) and a mixture of heteroaryl mercaptan and trimethylamine (Et3N) in a mixture of water and dialkane to generate heteroaryl glycosyl thioether; b, under the irradiation of a blue light LED, in the presence of Hantzsch ester (HE), 1, 4-diazabicyclo [2.2. 2] octane (DABCO) and DMSO, heteroaryl glycosyl thioether and a reagent are subjected to light-induced cross coupling, and the compound is generated.

A resist underlayer film-forming composition in which a coating film having high flattening properties is formed on a substrate. A resist underlayer film-forming composition including an epoxy adduct (C) obtained by reacting an epoxy group-containing compound (A) with an epoxy adduct-forming compound (B), wherein one or both of the epoxy group-containing compound (A) and the epoxy adduct-forming compound (B) contain an optionally branched alkyl group having a carbon atom number of three or more. The epoxy adduct-forming compound (B) is at least one compound selected from the group consisting of carboxylic acid (B1), carboxylic anhydride (B2), a phenol compound (B3), a hydroxyl group-containing compound (B4), a thiol compound (B5), an amino compound (B6), and an imide compound (B7). The optionally branched alkyl group having a carbon atom number of three or more is contained in the epoxy adduct-forming compound (B). The optionally branched alkyl group has a C3-19 alkyl group.

The present invention provides a halogen-free MXene represented by the following formula (1), that has no halogen in its surface functional group by performing an etching process to generate MXene from a MAX Phase material, and after the etching process, performing an impurity removal treatment process of etching and removing impurities using a halogen-free etchant and a halogen-free post-treatment agent, respectively.Mn+1XnTx  [Formula 1]wherein, M is a transition metal element selected from the group consisting of Sc, Ti, V, Cr, Mn, Y, Zr, Nb, Mo, Hf, and Ta, X is at least one of carbon and nitrogen, and n is an integer from 1 to 4, and Tx is a functional group selected from the group consisting of oxygen, alkoxide of 1 to 5 carbon atoms, alkyl, carboxylate, hydroxide, hydride, oxide, sub-oxide, nitride, sub-nitride, sulfide, sulfonate, thiol, and epoxide.

The invention relates to a click photocuring material as well as a preparation method and application thereof, and relates to the field of heat-conducting insulating materials. The click photocuring material is prepared from the following raw materials: a photocuring monomer, a bifunctional or polyfunctional sulfhydryl compound, a photoinitiator and a modified heat-conducting particle filler, the click photocuring material is prepared through a thiol-ene click reaction. Compared with a traditional free radical and cation photocuring system, the click photocuring material has the advantages that the problems of oxygen inhibition, initiator residue, volume shrinkage and the like do not exist.

The invention relates to a solid adsorbent and a preparation method thereof. The solid adsorbent is composed of a porous solid carrier and a load. The porous solid carrier comprises a molecular sieve, silica gel, aluminum oxide, hydrotalcite and derivatives thereof. The load is composed of a main agent and an auxiliary agent, the main agent is polyamide-amine of which the terminal group is modified by amino and hydroxyl, and the molar ratio of the amino to the hydroxyl is 1: 1-1: 1.5; and the auxiliary agent is one or more of AMP (adenosine monophosphate), hydroxyethylpiperazine (HPZ), 1, 8-diazabicyclo undec-7-ene (DBU) and sulfolane (TS). The load accounts for 25%-150% of the weight of the porous solid carrier, and the mass fraction of the main agent in the load is 35%-80%. The method has the advantages of adjustable selectivity, high adsorption speed, large adsorption capacity and high removal rate of COS, methyl mercaptan, ethanethiol and other organic sulfur.

The present invention relates to the technical field of inks, and discloses a degradable water-based ink and a preparation method thereof. In the present invention, a DCPD petroleum resin reacts with 4-mercaptohydrocinnamic acid through a thiol-ene addition reaction to obtain a modified petroleum-based resin. Using diallylamine, mercaptopropyltriethoxysilane, 1,6-dibromohexane, epichlorohydrin, etc. as raw materials, through a thiol-ene addition reaction, a substitution reaction, and a quaternization reaction in sequence, a polysilane epoxy-based gemini quaternary ammonium salt is obtained. The epoxy group in the polysilane epoxy-based gemini quaternary ammonium salt undergoes a ring-opening reaction with the hydroxyl group in polyvinyl alcohol to obtain modified polyvinyl alcohol. Finally, the modified petroleum-based resin, modified polyvinyl alcohol, polylactic acid, defoamer, dispersant, etc. are stirred and mixed evenly to obtain a degradable water-based ink. The degradable water-based ink prepared in the present invention is experimentally proven to have good antibacterial properties and adhesion.

It is an object of the present invention to provide a monomer which can provide a cured product having both high toughness and rigidity. The present invention is a (meth)acrylate (D) which is a reaction product of a thiol compound (A) having two or more mercapto groups; an iso(thio)cyanate compound (B) having two or more iso(thio)cyanato groups; and a hydroxy (meth)acrylate compound (C) having one or more polymerizable groups.

The invention relates to the technical field of multifunctional films, and discloses a high-breathability light-proof antibacterial fresh-keeping film and a preparation method thereof.Based on an epoxy-hydroxyl ring-opening mechanism and an ion exchange effect, sodium citrate, allyl glycidyl ether and compatibilized long aliphatic chain quaternary ammonium salt serve as raw materials, and an alkenyl compatibilized connecting agent is prepared; based on a sulfydryl-alkene click reaction mechanism, the method comprises the following steps: modifying an alkenylation compatibilization type linking agent on the surface of silver-loaded or non-silver-loaded sulfydryl nano zinc oxide to prepare a silver-loaded or non-silver-loaded organic-inorganic hybrid composite functional component; low-density polyethylene resin and an organic-inorganic hybrid composite functional component (or a silver-loaded organic-inorganic hybrid composite functional component) are used as raw materials, and the high-breathability light-proof antibacterial fresh-keeping film is prepared through extrusion granulation, blow molding film forming and stretching processes. The film product prepared by the invention has high air permeability, light resistance and antibacterial ability, and can be used as a fresh-keeping packaging material for fruits and vegetables.

The invention relates to a method for efficiently treating diacetylmonoxime production wastewater, and belongs to the technical field of diacetylmonoxime production wastewater treatment. The method comprises the following steps: reacting diacetylmonoxime wastewater, an iron-carbon material, an H2O2 solution and a coagulant, precipitating and filtering; taking the filtered clear liquid, and carrying out air stripping by using nitrogen; adding activated sludge, mechanically stirring to keep the sludge in a uniform fluidized state in the clear liquid, and carrying out anaerobic treatment and aerobic treatment; the coagulant is prepared by the following steps: carrying out click chemical reaction on ferrocenyl hexanethiol, benzofuryl-containing acrylamide, toluene and a photoinitiator under the irradiation of ultraviolet light with the absorption wavelength of 365 nm, and distilling to remove toluene after the reaction is ended. The acrylamide containing the benzofuran group is prepared from 2, 3-dihydro-1-benzofuran-5-yl isocyanate, hydroxymethyl acrylamide, organic tin and DMF (Dimethyl Formamide), and the acrylamide containing the benzofuran group is prepared from the 2, 3-dihydro-1-benzofuran-5-yl isocyanate, the hydroxymethyl acrylamide, the organic tin and the DMF; the coagulant prepared by the invention can effectively remove various impurities such as COD (Chemical Oxygen Demand), ammonia nitrogen, TP (Total Phosphorus) and the like in diacetylmonoxime wastewater.

The invention discloses a mercaptan-coated proton exchange membrane fuel cell cathode catalyst slurry, a preparation method and a membrane electrode, and the method comprises the following steps: step 1, dispersing carbon black in a water-alcohol solution and a surfactant to obtain a carbon black solution; 2, respectively preparing a platinum precursor solution and a cobalt precursor solution; 3, mixing the carbon black solution, the platinum precursor solution and the cobalt precursor solution, removing the solvent, and performing thermal reduction in reducing gas to obtain a binary ordered alloy catalyst; the temperature of the thermal reduction ranges from 700 DEG C to 1000 DEG C, and the time ranges from 0.5 h to 2 h. Step 4, dissolving the mercaptan powder in a mixed solvent of deionized water and isopropanol according to a ratio of 1: 1 to prepare a 1wt% mercaptan-containing solution; then, cooling the solution to 5 DEG C until solid substances are completely dissolved; and step 5, fully mixing the catalyst with the prepared mercaptan solution. And step 6, removing excessive mercaptan, and centrifuging the solution at the rotating speed of 10000 revolutions per minute for 10 minutes. And drying the precipitate in a vacuum drying oven for 12 hours to obtain the catalyst. The mercaptan-coated binary alloy catalyst prepared by the method can avoid poisoning effect of sulfonate radicals on Pt, improves expression of catalyst activity, and is helpful for improving performance of a fuel cell.