20 results about "Thiol functionalized" patented technology

The invention discloses a method for rapidly adsorbing heavy metal ions by a sulfydryl-functionalized non-woven fabric, relates to preparation of the sulfydryl-functionalized non-woven fabric and heavy metal adsorption application, and belongs to the technical field of functional materials and environmental protection. A catechol derivative, an oxidizing agent, a sulfur-containing coupling agent and the like are prepared into a reaction solution according to a certain proportion, then the non-woven fabric is immersed into the reaction solution for surface modification, the sulfydryl-functionalized non-woven fabric is prepared through reduction, and finally the sulfydryl-functionalized non-woven fabric is applied to adsorption and removal of heavy metal ions in water. The method has the advantages of being mild in condition, high in reaction speed and short in preparation period, the operation process is simple, universality is achieved, and the prepared functional material has the advantages of being good in heavy metal ion adsorption effect, good in functional modification layer stability and the like.

The invention discloses an iron-carbon composite material for heavy metal contaminated soil remediation and a preparation method of the iron-carbon composite material, and belongs to the field of heavy metal contaminated soil remediation. The iron-carbon composite material comprises rape straw, hydroxyapatite, zero-valent iron, sulfydryl functionalized magnetic cerium oxide and nitrogen-doped graphene quantum dot-sodium alginate. The sulfydryl-functionalized magnetic cerium oxide is prepared from cerium nitrate and ferric nitrate through precipitation, calcination and sulfhydrylation, and the nitrogen-doped graphene quantum dot-sodium alginate is prepared from citric acid and urea through microwave reaction, dialysis, mixing and freeze drying; the preparation method comprises the following steps: treating straws and hydroxyapatite to obtain ball-milled phosphorus-containing biochar, mixing the ball-milled phosphorus-containing biochar with zero-valent iron and two modifiers, and carrying out molding and high-temperature calcination to obtain the phosphorus-containing biochar-based composite material. The material has a remarkable remediation effect on the heavy metal contaminated soil, can effectively reduce the activity of heavy metals in the soil, has the characteristics of environmental friendliness and high stability, and is suitable for treating the soil compositely contaminated by the heavy metals such as cadmium and lead.

The application discloses a preparation method of a high-activity multi-level-pore boronic acid imprinting hydrogel microsphere adsorbent and application of the adsorbent to selective adsorption of a flavonoid compound naringin (NRG). The application enhances surface functionalization of COFs by dopamine modification, prepares thiol functionalized covalent organic framework microspheres, synthesizes thiol microspheres by using an emulsion interfacial polymerization method, prepares COFs boron affinity imprinting microsphere adsorbents based on boron affinity, and applies the adsorbents to selective adsorption of NRG in agricultural wastewater. The prepared adsorbent has a significant multi-layer adsorption effect, and the adsorption capacity is significantly improved by using boron affinity. The multi-level-pore structure of the COFs microspheres provides abundant sites for adsorption, and significantly improves the mass transfer rate. In addition, the prepared adsorbent has significant specificity in adsorption and separation of NRG, and provides a promising adsorption material for industrialized separation of NRG.

Curable resin compositions having extended open times at ambient temperatures and short cure times at high temperatures are prepared using a curable resin curable by one or more liquid organic peroxides or blends thereof and an accelerator / activator accelerator comprising a metal salt and a thiol-functionalized organic compound.

The application discloses a preparation method of a ratio fluorescent chromatography test strip and application in detection of patulin, and comprises the following steps: S1, preparation of blue carbon dots; S2, preparation of gold nanoclusters; S3, preparation of a ratio fluorescent probe. The application is based on a strategy of red fluorescence quenching and blue fluorescence opening. The solution of thiol functionalized AuNCs is rich in functional groups (-SH) and is combined with patulin. Red fluorescence is gradually quenched, and blue fluorescence is opened, so that the function of detecting patulin is realized. The change of fluorescence color is from red to blue, and the whole fluorescence signal response can be completed within 10 seconds. In addition, with the continuous increase of the concentration of patulin, the red fluorescence is gradually quenched, the blue fluorescence is gradually enhanced, and a series of changes in fluorescence intensity is presented under an ultraviolet lamp, so that the visual detection of patulin is realized. The application can realize convenient and rapid preliminary detection of food health.

An organo(poly)siloxane (A) consists of units of general formula (I) RnSiO(4-n / 2), where R is selected from the radicals R1, —OR2, Ru, RS and Q, wherein R1 denotes a monovalent substituted or unsubstituted hydrocarbon radical having 1 to 18 carbon atoms, R2 denotes a hydrogen atom or a monovalent substituted or unsubstituted hydrocarbon radical having 1 to 6 carbon atoms, Ru denotes a monovalent aliphatic unsaturated hydrocarbon radical having 2 to 18 carbon atoms, RS denotes a monovalent thiol-functionalized hydrocarbon radical, Q is a nitrogen functional group of formula (II) —CR5R6—NR4R3, where R3 and R4 each independently denote hydrogen or a substituted or unsubstituted hydrocarbon radical, and R5 and R6 each independently denote hydrogen or the methyl radical. The organo(poly)siloxane (A) contains per molecule at least one unit of general formula (III) Q-Si(OR7)2O1 / 2, at least 1 aliphatically unsaturated radical Ru, and at least 2 thiol-functionalized groups RS.

The present technology relates to thiol functionalized conductors which can be grafted onto polymers and methods for making same. In certain embodiments, the thiol functionalized conductors can be grafted onto polymers with low Tg to synthesize single-ion conducting polymer electrolytes (SIPE) having improved conductivity. The thiol functionalized conductor compound comprises a covalently attached sulfonimide anion on one end, which is associated with a monovalent cation; 1-3 hydrocarbon chains as the linker (L); 0-2 functional groups (R); and a thiol group on the other end of the compound.

The invention describes a thiol functionalized clay biochar composite adsorbent, which can be prepared by mixing bentonite-type clay rock containing montmorillonite and biochar in a weight ratio of 20:80 to 80:20, preferably 1:1, the mixture is then homogenized in a mill, preferably with high grinding efficiency to form a finely dispersed clay biochar composite; the composite is dispersed in 10 to 30 times by weight of a mixture of solvents containing deionized water and alcohol with a concentration of at least 60% vol. of alcohol with intensive stirring until a suspension is formed; subsequently, an organosilane agent with a thiol –SH functional group is added dropwise with constant stirring in an amount of 0.1 to 55% by weight based on the clay biochar composite; The pH is then adjusted to be alkaline above 7.5 using hydroxide to promote hydrolysis and condensation of silane groups and their chemical binding to the clay biochar composite, and the mixture is stirred until the reaction is complete, then the product is filtered off and washed with alcohol and deionized water, dried at a maximum of 90 °C or lyophilized at -80 to +50 °C.

The invention discloses a preparation method and application of a high-affinity MOFs (Metal-Organic Frameworks) boron affinity molecularly imprinted hydrogel adsorbent. According to the invention, MOFs are modified by cellulose nanocrystals so as to enhance the surface functionalization of the MOFs; preparing a sulfydryl functionalized covalent organic framework microsphere; the preparation method comprises the following steps: by taking hybrid MOFs as Pickering particles, preparing a high-affinity MOFs-based boron affinity imprinted hydrogel adsorbent by combining emulsion interface crosslinking with an RAFT (reversible addition fragmentation chain transfer) imprinting strategy; the adsorbent is applied to selective adsorption of NRG in agricultural wastewater. The polymer with the boron affinity imprinting cavity is synthesized through the RAFT emulsion microreactor, rich sites are provided for selective adsorption, the mass transfer rate is remarkably increased, and the adsorption capacity of the polymer is improved. It is worthy of notice that the adsorbent shows a remarkable specific advantage in NRG adsorption and separation links, and an adsorption material with a good application prospect is provided for promoting the industrial separation process of NRG.

The invention provides a dental anti-fouling bonding material based on a sulfydryl functionalized cationic polymer and application of the dental anti-fouling bonding material. The main component of the dental anti-fouling bonding material is a sulfydryl functionalized cationic polymer, a dental anti-fouling bonding pretreatment agent can be prepared, the anti-fouling bonding pretreatment agent is matched with a bonding agent for use, and the bonding performance of the bonding agent to dentin can be improved. Particularly, under the condition that the bonding surface is polluted by body fluid such as blood and saliva, the adverse effect of pollution on bonding can be eliminated by using the anti-pollution bonding pretreatment agent. In addition, sulfydryl functionalization enables the pretreatment agent to have the capability of actively inducing permeation of an adhesive, and good adhesive performance can still be obtained under the condition of repeated pollution. The anti-fouling bonding pretreatment agent also has the properties of killing residual bacteria on a bonding surface and inhibiting endogenous enzymes on the bonding surface, and can improve the bonding durability in multiple ways.

This invention relates to improved cellulose nanocrystal fillers for rubber compositions and more specifically with the grafting of disulfide and thioesters onto cellulose nanocrystals for improved performance as a filler in rubber compositions. At least one embodiment describes a method to graft thiols or disulfides on CNC surfaces via esterification exemplified by 3-mercapto-propionic acid (MPA), 3-(acetylthio) propionic acid (APA), or dithiodipronanoic acid (DTDPA). The reaction may be carried out on CNCs highly dispersed in a suitable solvent and improved reaction conditions to achieve a favorable degree of substitution, DS. The embodiment further discloses how surface thiol groups can then be protected, in a second step, as thioesters or asymmetric disulfides to tune the hydrophobicity of CNCs to improve compatibility with styrene-butadiene, SBR, or natural rubbers.

The invention relates to printing ink and a preparation method and application thereof, the printing ink is composed of liquid acrylate poly (4-methyl-epsilon-caprolactone), thiol functionalized polyethylene glycol and an ultraviolet light initiator, the molar ratio of the liquid acrylate poly (4-methyl-epsilon-caprolactone) to the thiol functionalized polyethylene glycol is 1: (0.25-1.0), and the ultraviolet light initiator is a solvent. The mass of the ultraviolet light initiator is (0.95 to 1.05) percent of the mass of the liquid acrylate poly (4-methyl-epsilon-caprolactone). The invention also provides a preparation method of the main components of the ink, a preparation method of the ink and a method for preparing a 3D biodegradable elastic component by using the ink through DIW printing. The printing ink has good printability and rapid ultraviolet light curing capacity, can form an elastic component which is stable in structure, biodegradable and good in biocompatibility, and is particularly suitable for the fields of tissue engineering and the like, and the printing ink and the printing method have wide application prospects in the fields of preparation of tissue engineering scaffolds and the like.

Disclosed and claimed herein are optical fiber primary coating composition comprising one or more oligomers (a) which is the reaction product of a hydroxy- or thiol-functional backbone compound, an isocyanate compound, and a hydroxyl-functional end-capper; optionally one or more second oligomer (b); optionally one or more reactive diluent monomer; one or more photoinitiators; and optionally one or more additives. The oligomer is present in an amount of at least 0.01 wt. % relative to the entire coating composition, and it possesses a molar ratio of isocyanate groups to hydroxyl- or thiol groups of less than or equal to 1.0. The total amount of (a)+(b) is between 70 wt. % and 99 wt. %. Also disclosed are methods of coating optical fibers incorporating the compositions described herein, along with the coated optical fibers and cables produced therefrom.

The application discloses a kind of thiol functionalized defect regulation type UiO-66-NH2 adsorption materials and its preparation method and application, material preparation first when zirconium source, 2-amino terephthalic acid, thiol derivative of benzoic acid and acid regulator are mixed in organic solvent, after solvent thermal reaction, it is obtained by washing and drying;The thiol derivative of benzoic acid is used as competitive ligand and thiol source simultaneously in the application, in situ grafting is carried out in the skeleton of UiO-66-NH2 while inducing the formation of oxygen vacancy defects, one step realizes defect construction and thiol functionalization, overcome the technical problems that active site loss is caused by traditional defect engineering and post-modification method is easily caused Channel blockage;The obtained material has high adsorption capacity and excellent selectivity to Pb (II) in water, and still maintains good regeneration performance after multiple cycles;The application process is simple, mild and low in cost, suitable for efficient selective removal of Pb (II) in water, and has good application prospect.

Curable resin compositions having extended open times at ambient temperatures and short cure times at elevated temperatures are prepared using a curable resin, a combination of room-temperature-stable liquid peroxides (including at least one perketal), a promoter salt, a thiol-functionalized organic accelerator and a free radical trap. The curable resin compositions are useful in pultrusion, cure-in-place pipe and resin transfer molding applications, among others.

Curable resin compositions with a long open time at room temperature and a short curing time at high temperatures are produced using a curable resin that can be cured with one or more liquid organic peroxides or mixtures thereof, and an accelerator / activator accelerator containing a metal salt and a thiol-functionalized organic compound.

A composition is described comprising an amine-reactive material; and a polymeric catalyst comprising hydroxyl groups and tertiary amine groups. The polymeric catalyst is typically suspended or dispersed in a liquid dispersant. The liquid dispersant does not covalently bond with the tertiary amine groups. The liquid dispersant is typically a hydroxy-functional or thiol-functional. Also described is a polymer network comprising the cured composition described herein, a polymer catalyst, and catalyst dispersion; as well as methods.

The disclosure provides for coatings disposed on a surface of a medical implant, where the coating includes a plurality of phage-mimicking nanoparticles (PhaNPs), the PhaNPs comprising: a silica core, silver coated gold nanospheres disposed on a surface of the silica core, and plurality of carboxy thiol functionalized (CTF)-polyethylenimine (PEI) polymers conjugated to the silver nanospheres, where the CTF-PEI polymers include a CTF moiety and branched and / or linear PEI moieties.

This invention relates to curable film-forming compositions and coating kits, each comprising: (a) a polyepoxide-functionalized polymer; (b) a polythiol-functionalized compound, wherein the polythiol-functionalized compound comprises at least two or at least three thiol functional groups, and wherein if the polythiol-functionalized compound contains hydroxyl functional groups, the ratio of thiol functional groups to hydroxyl functional groups in the polythiol-functionalized compound is not 1:1; (c) a reactive compound, different from the polythiol-functionalized compound (b), the reactive compound containing a plurality of side groups and / or terminal functional groups selected from carboxylic acids, anhydrides, amines, and phenols that are reactive with the epoxide functional groups; and (d) a pigment. The curable film-forming compositions exhibit a pigment-to-binder ratio greater than or equal to 2 and less than 3, adhesion to various substrates, and rapid sanding properties. The invention further relates to coated articles and methods for forming the same.