185 results about "Reactive dye" patented technology

The invention provides a reactive dye with a high fixation rate and a preparation method thereof. The reactive dye is prepared from the following raw materials in parts by mass: 25 parts of modified reactive dye, 0.3-0.7 part of a metal ion agent and 60-80 parts of water, wherein the modified reactive dye is obtained by inclusion of reactive dye molecules with beta-cyclodextrin-pyridine carboxylic acid, and beta-cyclodextrin and pyridine carboxylic acid in the beta-cyclodextrin-pyridine carboxylic acid are connected through an alkyl chain; metal ions provided by the metal ion agent can be chelated with the picolinic acid. Reactive dye molecules and beta-cyclodextrin-pyridine carboxylic acid form an inclusion structure, the hydrolysis probability of active groups is reduced, and an alkyl chain regulates steric hindrance and molecular spacing, so that pyridine nitrogen and carboxylic acid more efficiently form a more stable chelate with metal ions and further form coordinate bonds with hydroxyl groups on the fiber surface, and the fixation rate of the reactive dye is improved.

The application discloses a low-temperature one-bath dyeing process for polyester-cotton blended fabric, which comprises the following steps: soaking the polyester-cotton blended fabric in an aqueous solution of alkaline ionic liquid for pretreatment to obtain a pretreated fabric with liquid; then mixing the pretreated fabric with liquid with reactive dyes and disperse dyes, and then performing supercritical CO2 fluid dyeing to obtain dyed fabric; the alkaline ionic liquid contains hydrophobic alkyl groups and has alkalinity; during the pretreatment, the alkaline anions form a hydrogen bond network with the hydroxyl groups of cellulose, thereby destroying the crystalline region of cellulose and increasing the dyeing rate; during the dyeing, the alkaline ionic liquid is distributed on the interface between water and CO2 fluid as a surfactant to form an inverse emulsion, thereby providing a microenvironment for the dyeing of cotton fibers by the reactive dyes; in addition, the alkaline anions of the alkaline ionic liquid can exchange with CO2 to generate carbonates, so that the polarity of the microenvironment is enhanced to be alkaline, and the reactivity of the reactive dyes and cotton fibers is improved, thereby improving the dyeing rate.

The application relates to a preparation method and application of a performance-adjustable reactive cationic polymer, and belongs to the field of textile printing and dyeing. The preparation method of the performance-adjustable reactive cationic polymer comprises the following process steps: mixing an epoxy reactive monomer with concentrated hydrochloric acid, reacting for a certain time under ice bath, and adjusting the pH of the reaction system to be neutral; adding a cationic monomer into the above reaction system, simultaneously adding a phase transfer catalyst or an organic solvent, adding an initiator drop by drop under a nitrogen atmosphere, stirring to carry out a free radical polymerization reaction, naturally cooling after the reaction is completed, and drying to obtain the reactive cationic polymer. According to the application, salt-free high-color-yield dyeing of reactive dyes can be realized when the amount of the cationic polymer is very low.

The invention discloses a preparation method of a multifunctional silk / fungus grass interwoven fabric. The preparation method comprises the following steps: (1) pretreating fibers; (2) weaving the interwoven fabric; (3) dyeing the fabric; (4) after-finishing the fabric; the advantages of the silk fibers and the fungus grass fibers are reserved at the same time, the long-acting antibacterial effect of the silk / fungus grass interwoven fabric is achieved through the antibacterial property of the fungus grass fibers, the fabric has the temperature adjusting function, the fragrance function, the machine washable function and the like at the same time through wet finishing, and the prepared silk / fungus grass interwoven fabric can be used for the fields of clothes, home textiles and the like. According to the method, the cohesive force lifting agent is utilized to conduct pretreatment on the silk fiber and the Juncao fiber before weaving, the equivalence of the cohesive force of the two fibers is guaranteed, the end breaking phenomenon in the weaving process is reduced, and meanwhile the smoothness of the interwoven fabric is guaranteed. The homochromatic coloring of the silk / fungus grass interwoven fabric is realized by utilizing the double-active-group reactive dye through a one-bath method, and the silk / fungus grass interwoven fabric has the advantages of high efficiency, good homochromatic property and the like.

The invention discloses a bisazo blue reactive dye for high-temperature dip dyeing as well as a preparation method and application of the bisazo blue reactive dye. The reactive dye is shown in a structural general formula (I). A color body of the reactive dye is of a bisazo structure, the color body contains two naphthalene ring structures and a benzene ring structure, and an active group in a dye molecular structure is quaternary ammonium salt containing a nicotinic acid structure. According to the present invention, the binding force between the dye and the fiber can be improved through the coplanarity of the chromophore molecules, the dissociation between the dye and the fiber at the high temperature can be reduced, and the dye uptake of the dye at the high temperature can be improved, such that the fixation rate between the dye and the fiber can be improved; meanwhile, quaternary ammonium salt containing a nicotinic acid structure can react with fibers under the high-temperature neutral condition, an alkaline agent does not need to be added in the whole dyeing process, the problem of environmental pollution caused by the alkaline agent in the printing and dyeing wastewater is solved, and wide application prospects are achieved.

This invention relates to the field of textile printing and dyeing, and discloses a high-colorfastness polyamide 56 fabric and its preparation method. The polyamide 56 fabric contains 70-100% polyamide 56 fiber and 0-30% spandex. The fabric has been dyed at least once, and the dye used for dyeing is a reactive dye. The polyamide 56 fabric dyed with reactive dyes of this invention has the advantages of higher dye uptake, wider pH adaptability, no need for large amounts of calcium salts for dyeing, and minimal or no use of color-fixing crosslinking agents.

This invention provides an antistatic dyeable spandex fiber and its preparation method. During spandex production, N-(2-hydroxyethyl)ethylenediamine is used as a terminating agent for chain extension, combined with the use of the stabilizer TAD, to prepare antistatic dyeable spandex fiber. This improves the dyeing rate and color fastness of spandex fiber to acid dyes and reactive dyes. Furthermore, the heat-resistant dyeable spandex can meet the high-temperature dyeing requirements in the polyester / spandex field. Simultaneously, the improved antistatic properties of the spandex fiber reduce the amount of oiling agents used by spandex manufacturers, thereby lowering production costs. For subsequent processes, it reduces the defect rate in dyeing, finishing, and weaving, saving costs.

The invention discloses an Aspergillus niger detection kit based on SERS (Surface Enhanced Raman Scattering) and a preparation and detection method thereof, the kit comprises an SERS nano-label, the structure of the SERS nano-label takes bionic gold nanoflower as a gold core, and the surface of the gold core is modified with a Raman reactive dye and an Aspergillus niger specific aptamer. The kit has high sensitivity, specificity, reproducibility, uniformity and stability, Raman spectrum can be collected through portable Raman spectrum equipment, the kit can be used for analysis of trace Aspergillus niger in a sample, and the detection limit is lower than 10 CFU / mL. Compared with a traditional bacterial culture method, the method has the advantages in the aspects of simplicity and convenience in operation, detection period, analysis cost and the like. The method is suitable for food safety monitoring.

The invention discloses a one-paste printing process for dispersing and reactive dye of polyester-cotton fabric. The process flow comprises the following steps: pre-rolling the polyester-cotton fabric with alkali liquor, drying, performing one-paste printing, drying, steaming, drying, baking, washing with cold running water, soaping, washing with warm water, washing with cold water, drying and discharging cloth. The method has the advantages of high fixation rate, short process flow, low wastewater COD (Chemical Oxygen Demand) and the like, and achieves the effects of improving efficiency, saving energy and reducing pollution.

This application relates to the technical field of reactive dyes, specifically to a photochromic red fluorine-containing reactive dye, its preparation method, and its application. The general structural formula of this photochromic red fluorine-containing reactive dye is as follows: [Formula omitted for brevity]. Wherein, R1 and R2 are -H, -SO3M, -CH3, -COOM, -NO2, or -NHCONH; R3 is -Cl or -SO3M; and M is Na, K, or Li. The reactive dye provided in this application exhibits good wash fastness, rubbing fastness, chlorine fastness, and good solubility on cotton fabrics, while also possessing excellent light fastness and superior fixation rate on cotton fabrics during medium-temperature dyeing.

The application discloses an aspergillus niger detection kit based on SERS and a preparation and detection method thereof. The kit comprises a SERS nanolabel, and the structure of the SERS nanolabel is that a bionic gold nanoflower is used as a gold core, and a Raman active dye and aspergillus niger specific aptamer are modified on the surface of the gold core. The kit has high sensitivity, specificity, reproducibility, uniformity and stability, can collect Raman spectrum through a portable Raman spectrum equipment, can be used for analyzing trace aspergillus niger in a sample, and the detection limit is lower than 10 CFU / mL. Compared with a traditional bacterial culture method, the kit has advantages in operation simplicity, detection period and analysis cost. The kit is suitable for food safety monitoring.

The application discloses a dyeing boosting agent and a low-temperature salt-free dyeing method for bio-based PLA / regenerated cellulose fiber blended fabric, and relates to the technical field of textile dyeing. A synergistic cross-linking modification system is constructed by using a bio-based small-molecule phenol with double functional groups and a high-density amino polymer. The fabric is pretreated and immersed for modification, a stable ion cross-linking adhesion layer is formed on the surface of the fiber, and then low-temperature dyeing of the electrolyte-free reactive dye is carried out. The process adopts a one-bath one-step method, does not need high temperature, high salt and reduction cleaning procedures, is simple in process, low in carbon and environmentally friendly, can realize synchronous dyeing and uniform color of PLA and regenerated cellulose fiber, effectively improves the fabric dyeing rate and color fastness, and significantly improves the ultraviolet resistance of the product. The application solves the problems of poor uniformity, low color fastness and large pollution existing in the traditional dyeing process, and is suitable for green and efficient production of bio-based blended fabric.

The application discloses a high-fast orange reactive dye and a preparation method thereof, relates to the field of reactive dyes, and comprises a structure general formula as follows: formula 1: formula 2: or formula 3: wherein R1 is halogen; R2 is -H, -SO3M, -CH3, -COOM or -CHO; and M is Na, K or Li. The application has the effects of improving the fixing effect and dyeing performance of the reactive dye.

The application relates to the technical field of organic dyes, in particular to a double-active-group cationic modified anthraquinone reactive dye as well as a preparation method and application thereof. The preparation method of the double-active-group cationic modified anthraquinone reactive dye comprises the following steps: S1: dissolving 1-amino-4-sulfonic acid-1'-(N,N-dimethylpropylaminomethyl) anthraquinone in ice water, then adding melamine dropwise to carry out reaction, and obtaining an intermediate solution; S2: the intermediate solution is warmed to 20-25 DEG C, and hydroxyethyl sulfone sulfonate is added to carry out reaction; after the reaction is completed, salting-out is carried out, and the double-active-group cationic modified anthraquinone reactive dye is obtained, as shown in formula (1). The reactive dye is synergized through the cooperation of "double active groups + cationic adjustment + precise water-solubility design", can guarantee water-solubility and dyeing fastness, and can completely get rid of the dependence on a large amount of salt.

A surgical instrument wrap having at least one or a plurality of fibrous layers that cooperate with at least one agent or dye layer that is generally not visible until the at least one or plurality of fibrous layers is damaged or disrupted. The at least one diffusible agent or dye layer diffuses or wicks into the disrupted or damaged area. A fluorescent dye, a reactive dye, a conjugant dye or an absorption wavelength of approximately 200-400 nanometers in one embodiment and an emission wavelength in the visible spectrum so that when the surgical wrap is damage or disrupted and then exposed to, for example, a fluorescent or ultraviolet light source, the agent or dye fluoresces to provide an indication to the user that damage to the wrap has occurred. The user can presume that the items or instruments in the surgical tray may be contaminated.

Described herein is a method for producing centrally colored silicone hydrogel contact lenses. The method comprises a step of cast molding of a lens-forming composition including a hydroxyl-containing polymerizable component to form an unprocessed silicone hydrogel contact lens having hydroxyl groups covalently incorporated into its polymer matrix and steps of applying and fixing a reactive dye to the polymer matrix only in its central circular region concentric with the central axis of the unprocessed silicone hydrogel contact lens. The obtained centrally colored silicone hydrogel contact lens has a central circular region that is only colored to selectively filter radiations of certain wavelengths, e.g., HEVL.

The present invention is related to reactive dyes each of which comprises a dichlorotriazine, chlorotriazine or vinylsulphonyl group and is capable of absorbing HEVL. They are suitable for method for producing colored silicone hydrogel contact lenses each made of a silicone hydrogel material having hydroxyl groups. The present invention is also related to a colored silicone hydrogel contact lens comprising a colored circular region in which a reactive dye is applied and thereby covalently attached.

The present application belongs to the field of fine chemical industry and textile printing and dyeing, and relates to a reactive dye which can be used for fixing color of dyed polyester fabric by dry heat setting process, a preparation method and dyeing application thereof. The reactive dye provided by the present application has a general structure, and the present application also simultaneously provides the use of the reactive dye, i.e. fixing color of dyed polyester fabric by dry heat setting process. Through ingenious design and application of the carbene type dye, the present application realizes high color fastness effect of dyed polyester fabric, eliminates the adverse factors of high temperature heat setting, and expands the optional range of setting heat setting process (temperature, time).

The invention relates to the field of spinning, and discloses a multistage self-polymerization cross-linking agent as well as a preparation method and application thereof. The method comprises the following steps: (1) preparing raw materials including cyanuric chloride, para-ester, monoamino hydroxyaniline, diaminobenzene sulfonic acid, a neutralizer and a composite solvent; (2) carrying out a reaction on cyanuric chloride, para-ester, monoamino hydroxyaniline and diaminobenzene sulfonic acid in a composite solvent, and controlling the pH value of a system in the reaction process to be 4-7 by adopting a neutralizer to prepare a multistage self-polymerization cross-linking agent dispersion liquid; and (3) carrying out reduced pressure distillation on the multi-stage self-polymerization cross-linking agent dispersion liquid to remove the composite solvent in the multi-stage self-polymerization cross-linking agent dispersion liquid to prepare the multi-stage self-polymerization cross-linking agent. The multistage self-polymerization cross-linking agent provided by the invention can realize cross-linking reaction with fibers under the condition of dyeing natural fibers by reactive dyes and in the dyeing process, the implementation process is simple and easy to implement, and the multistage self-polymerization cross-linking agent is convenient to use.

Described herein is a method for producing centrally colored silicone hydrogel contact lenses. The method comprises a step of cast molding of a lens-forming composition including a hydroxyl-containing polymerizable component to form an unprocessed silicone hydrogel contact lens having hydroxyl groups covalently incoporated into its polymer matrix and steps of applying and fixing a reactive dye to the polymer matrix only in its central circular region concentric with the central axis of the unprocessed silicone hydrogel contact lens. The obtained centrally colored silicone hydrogel contact lens has a central circular region that is only colored to selectively filter radiations of certain wavelengths, e.g., HEVL.

A method for dyeing a cellulose-based fiber or a fiber product containing a cellulose-based fiber, the method comprising a step for supplying water in a first temperature range of 5 DEG C or more and less than 30 DEG C or in a second temperature range of 30 DEG C or more and less than 40 DEG C to a dyeing bath; a step for feeding a cellulose-based fiber or a fiber product containing a cellulose-based fiber, in which the water supply and the feeding are performed in any order; a temperature raising step for raising the temperature from the first temperature region to a second temperature region in which the temperature is at least 30 DEG C and less than 40 DEG C, and raising the temperature from the second temperature region to a third temperature region in which the temperature is at least 40 DEG C and less than 70 DEG C, or raising the temperature from the second temperature region to a third temperature region in which the temperature is at least 40 DEG C and less than 70 DEG C; a step for maintaining the third temperature for a predetermined period in the third temperature region; a step in which a reactive dye is introduced at a temperature equal to or higher than the first temperature region; and 7, a step for adding a mixture of an inorganic salt and an alkaline agent in batches three or more times, separately from the step for adding the reactive dye, at a temperature equal to or higher than the second temperature range.

The present invention provides compositions and methods useful for detecting live cells and dead cells in a cell sample. The methods rely on labelling compounds comprising a maleimide moiety linked to a label.

The application discloses a continuous heat exchange device for active dye processing, which comprises a mother heat exchange structure, supports are detachably installed at both ends of the mother heat exchange structure, a son heat exchange structure is detachably embedded in the middle of the mother heat exchange structure, and the son heat exchange structure can be connected with the mother heat exchange structure, and the application relates to the technical field of heat exchange equipment, directly aims at the typical industrial scene that heat-releasing reactions need to remove heat and heat-absorbing reactions need to supplement heat, solves the pain points of heat waste and high external energy consumption of traditional separated heat exchangers, realizes heat complementary utilization of heat-releasing and heat-absorbing, reduces heat transfer loss, has higher heat utilization efficiency, is integrally compactly designed, saves space and installation cost, the mother heat exchange structure and the son heat exchange structure can be independently used, the length of a pipe can be set according to actual requirements, and the number of mother rings and son rings can be additionally increased.

The application provides a reactive dye one-bath and same-color dyeing method for mercerized wool and cellulose fiber blended and interwoven fabric, and belongs to the technical field of textile printing and dyeing. The method comprises the following steps: using reactive dyes containing double monochloro-s-triazine, in the presence of auxiliary naphthalenesulfonic acid sodium or its derivatives, peregal O-30, ablate B, anhydrous sodium sulfate and alkali agent, one-bath and one-step simultaneous dyeing of mercerized wool and cellulose fiber blended and interwoven fabric is realized, the complexity of dyeing processing is reduced, and the wool fiber has high soaping fastness without fixing. The dyeing method provided by the application also has the characteristics of low cost, energy saving and high efficiency, convenient implementation, no need for special adjustment of processing equipment, strong applicability, and applicability to general fabric.

The invention provides a lyocell fabric dyeing anti-fibrillation finishing method which is characterized by comprising the following steps: 1, desizing and cleaning a lyocell fabric, feeding water according to a bath ratio of (1: 4)-(1: 20) to run the lyocell fabric, adding an anti-fibrillation cross-linking agent according to 3%-10% owf, adding a proper amount of reactive dye, and running uniformly; the anti-fibrillation cross-linking agent is a polyfunctional group compound containing more than two monochloro-s-triazine active groups and / or vinyl sulfone sodium sulfate active groups; the reactive dye comprises one or more of a monochloro-s-triazine type, a vinyl sulfone type, a monochloro-s-triazine group and a vinyl sulfone group double-active-group type; 2, anhydrous sodium sulphate is added, the temperature is increased to 60-70 DEG C, 15-25 g / L of sodium carbonate is added, and operation is conducted for 35-55 min; and 3, the temperature continues to rise to 75-85 DEG C, operation is conducted for 10-20 min, and drainage and cleaning are conducted after cooling. The process is simple, the flow is short, fibrillation can be prevented, the dyeing effect is good, formaldehyde release is avoided, a large amount of water resource consumption is saved, and wastewater discharge is reduced.

The application relates to the technical field of fabrics, and particularly discloses a full-cotton moisture-absorbing and quick-drying fabric and a preparation method thereof. The preparation method comprises the following steps: S1, taking cotton yarn, carrying out dyeing treatment by adding active dyes after boiling and bleaching, then carrying out hydrophilic treatment by adding a hydrophilic agent, drying the yarn to obtain hydrophilic cotton yarn, and reserving the hydrophilic cotton yarn; taking cotton yarn, carrying out dyeing treatment by adding active dyes after boiling and bleaching, then carrying out waterproof treatment by adding a waterproof agent, drying the yarn to obtain waterproof cotton yarn, and reserving the waterproof cotton yarn; S2, covering the hydrophilic cotton yarn outside the waterproof cotton yarn to obtain a covered structure yarn; and S3, weaving a plain knit fabric by using the covered structure yarn through a circular knitting machine. The hydrophilic cotton yarn and the waterproof cotton yarn have different counts, and the ratio of the counts is 0.25-1. The special covered structure yarn plain fabric is woven by using the hydrophilic cotton yarn with a lower count to cover the waterproof cotton yarn with a higher count, so that the advantages of softness and air permeability of single-layer cotton knitted fabric are retained, and the moisture-absorbing performance is good.

The invention belongs to the technical field of reactive dyes, and particularly provides a preparation method of a bright yellow reactive dye. The bright yellow reactive dye prepared by the method disclosed by the invention is a bisazo dye, the fixation rate is relatively high, the color of a dyed fabric is full, sulfonic groups are increased, and the dye solubility is good; the dye is high in solubility and improvement rate, good in leveling property, green and bright in color, good in light fastness and wet rubbing fastness, good in cleaning rate and suitable for dyeing various cellulosic fibers, the fixation rate reaches 65%, the dye belongs to environment-friendly and energy-saving dye, the product is suitable for dyeing various cellulosic fibers, the production process is simple, clean and environmentally friendly, spray drying is adopted after synthesis, the wastewater discharge amount is reduced, and the production cost is reduced. And the national energy conservation and emission reduction policy is met.

A kind of wide silk brocade elastic jacquard fabric's pad dyeing method belongs to real silk dyeing and finishing technical field.It includes the following steps: including the following steps: 1) pre-setting, 2) biological degumming, 3) pad dyeing, 4) washing, 5) soaping, 6) drying, 7) tentering setting;1) pre-setting: the dry state of fabric, setting, setting temperature 195-200 ℃, speed 30-35 m / min;3) pad dyeing: the fabric is wound on the pad dyeing machine, and then dyed with dye liquor;Dye liquor contains water, reactive dye 10-25 g / L, sodium sulphate 50-65 g / L, soda 3-7 g / L;Dyeing temperature 78~82 ℃.The wide silk brocade elastic jacquard fabric's pad dyeing method of the application, after dyeing, the weft yarn is not lost elastic, the weft elastic is good, the width is stable, the shrinkage is low, and the color fastness is good, the warp yarn is not stained with weft yarn.

This application provides a method for preparing and applying a red reactive dye. The method includes the following steps: S1: providing 2-amino-5-(β-hydroxyethyl sulfone sulfate)-1,3,4-thiadiazole; S2: reacting the amino-containing red azo compound with cyanuric chloride, causing the amino group on the amino-containing red azo compound to undergo a substitution reaction with one chlorine atom in the cyanuric chloride, to obtain a red azo compound containing a dichlorotriazine group; S3: reacting the 2-amino-5-(β-hydroxyethyl sulfone sulfate)-1,3,4-thiadiazole with the red azo compound containing a dichlorotriazine group, causing the amino group on the 2-amino-5-(β-hydroxyethyl sulfone sulfate)-1,3,4-thiadiazole to undergo a substitution reaction with one chlorine atom in the red azo compound containing a dichlorotriazine group, to obtain a red reactive dye. The red reactive dye prepared by this application exhibits high fixation rate and excellent alkali fastness in fiber dyeing.