71 results about "Natural dye" patented technology

The application relates to an engineering bacterium for high yield of observation blue and a construction method and application thereof, and belongs to the technical field of biological synthesis of natural dyes. The engineering bacterium for high yield of observation blue expresses icd, bpsA, glnA Y405F and gdhA; the engineering bacterium knocks out acnR, yggB, glsK, aceA and ldh. By knocking out the yggB and aceA genes, performing site-directed mutation (Y405F) on the glnA gene, replacing the glsK gene with the glnA Y405F gene, replacing the acnR gene with the icd gene, replacing the ldh gene with the gdhA gene, and integrating the bpsA gene, the application can block the formation of by-products such as lactate and succinic acid in the observation blue synthesis process, improve the flow direction of the citric acid->isocitric acid->alpha-ketoglutaric acid->glutamic acid->glutamine path, and then improve the intracellular glutamine concentration, so that the yield of observation blue is improved.

The invention relates to natural dye and green chemical industry, and particularly discloses water-soluble biological indigo blue and a preparation method thereof. The water-soluble biological indigo comprises the following raw material components in parts by weight: 80-90 parts of a biological-based indigo concentrated solution; 0.5 to 1 part of dimethyl sulfoxide; 10 to 15 parts of a solubilizer A; 5-10 parts of a solubilizer B; and 10 to 15 parts of deionized water. According to the invention, the bio-based indigo concentrated solution synthesized by a biological method is used as a raw material, the water-soluble compound is innovatively formed through beta-cyclodextrin inclusion and povidone compounding, and the water-soluble compound has relatively high water solubility; the water solubility of the product is greater than or equal to 50g / L, the stability is excellent, the obtained indigo dye is natural in source, environment-friendly and high in water solubility, secondary pollution of the traditional dye to the environment is avoided, and the indigo dye is suitable for sustainable chemical industry and green dyeing and finishing industries and can be widely applied to the fields of textile dyeing, water-based ink, cosmetic color developing agents, medicines and the like.

The application discloses a preparation method of active chitosan quaternary ammonium salt modified cellulose fabric based on a dispersion system, and belongs to the field of textile chemistry. The effective grafting of chitosan quaternary ammonium salt and nitrogen-containing heterocyclic monomers is realized by using a dispersion system, the active sites on the chitosan quaternary ammonium salt are increased, the covalent grafting effect of the active chitosan quaternary ammonium salt and the cellulose fabric is improved, the cellulose fabric is endowed with durable antibacterial function, the dyeing performance of the cellulose fabric in natural dyes and active dyes is improved, and when the cellulose fabric prepared by the method is dyed by using active dyes, the amount of neutral salt can be reduced.

The invention provides a natural dye lake pigment and a preparation method thereof, and belongs to the technical field of pigments. Soluble silicon-doped carbon quantum dots are introduced into a natural dye solution to serve as a precipitator, the aggregation state of the natural dye is changed, and the lake pigment is obtained through mixing treatment. The prepared natural dye lake pigment is simple in preparation method and mild in preparation condition, the prepared pigment greatly overcomes the defects that natural dye is prone to discoloration and unstable, the oxygen heat resistance of the pigment is improved, the color stability is good, the lake pigment only comprises five elements of C, H, O, N and Si, the ecological pollution-free characteristic is achieved, and the application prospect is wide.

The invention relates to the technical field of synthesis of natural dyes by a biological method, in particular to an antibiotic-demand-free ornamental blue high-yield strain as well as construction and application of the antibiotic-demand-free ornamental blue high-yield strain. Corynebacterium glutamicum is used as an initial strain, a tricarboxylic acid circulating gene is regulated and interfered, and the copy number of exogenous blue pigment synthetase BpsA in a genome is adjusted, so that the ornamental blue high-yield strain is obtained. The strain does not need to use antibiotics in the fermentation process, the yield is stable, the product production capacity equivalent to the level when antibiotics are used can still be achieved through fermentation under the antibiotic-free condition, and the growth performance of the strain is kept. The method for producing the ornamental blue by using the strain provided by the invention ensures that the ornamental blue product is natural and green, also improves the efficient production capacity of the strain, solves the contradiction between green environmental protection and stable high yield of the ornamental blue dye, is green and environment-friendly, and has a remarkable industrial application prospect.

The invention belongs to the technical field of natural dyes, and provides a natural coloring agent based on roxburgh rose whole plant components as well as a preparation method and application of the natural coloring agent. The preparation method comprises the following steps: fermenting whole rosa roxburghii plants, residues obtained after juicing or dried fruits used as raw materials for 15-30 days under a pure natural acidic or alkaline condition, and soaking cloth to be dyed into fermentation liquor for 7-30 days, so as to finish dyeing. The acidic condition is provided by malic acid or acetic acid, and the alkaline condition is provided by pure natural salt. The method has the advantages of simple process, mild conditions, no use of any chemical synthesis auxiliary agent, environmental protection and safety. By means of the method, natural cloth such as mulberry silk, cotton and hemp can be dyed, the unprecedented and unique golden yellow color can be dyed, and the method has great market application value.

The invention discloses a preparation method of a high-elasticity comfortable environment-friendly jeans material, and relates to the field of textile and clothing materials. Regenerated cellulose and spandex or high-elastic fibers are introduced into the warp yarns and the weft yarns respectively, and 2 / 1 or 3 / 1 twill weaving is matched; wet enzyme desizing and a cellulase-selenium bridge auxiliary agent are used for synergic softening finishing, and a fluoride-free hydrophilic agent is used for non-ironing shaping; active or natural dye can be selected for neutral dyeing. According to the method, the breathability and the hand feeling are improved while low growth and high recovery rate are achieved, the strength is kept, the shrinkage rate is low, and the fastness is high; and the selenium bridge polymer endows more than or equal to 99% of persistent bacteriostasis to escherichia coli. And the method is green in process, low in energy consumption and chemical dosage and suitable for large-scale production.

The invention discloses an antibacterial and hydrophilic dual-functional ionic liquid double-layer membrane as well as a preparation method and application thereof. According to the double-layer film, corn starch (ST) and polyvinyl alcohol (PVA) serve as substrates, and natural dye alizarin (AL) is mixed to serve as a hydrophilic layer; chitosan (CS), corn protein (Zein) and vanillin (VA) serve as a supporting layer; meanwhile, the ionic liquid is doped, so that the double-layer film is endowed with a fresh-keeping function and sensitive detection capability, the limitation of a single detection function is broken through, and a new thought is provided for food safety.

The invention relates to a cosmetic agent for the non-oxidative dyeing of keratin fibers, in particular human hair, comprising two separate compositions, wherein the first composition comprises at least one glycosylated dye or dye precursor, in particular a glycosylated natural dye or natural dye precursor, and wherein the second composition comprises at least one β-glucosidase (EC 3.2.1.21). The invention further relates to a method for the non-oxidative dyeing of keratin fibers, in particular human hair, using a cosmetic agent according to the invention.

The invention discloses a folium artemisiae argyi dyed multifunctional cotton fabric and a preparation method thereof, and belongs to the technical field of textile dyeing and finishing. The method comprises the following steps: firstly, carrying out reflux extraction on folium artemisiae argyi by adopting a 95% ethanol solution to efficiently obtain a functional dye with water-soluble and fat-soluble pigments; then, the cotton fabric is pretreated with alum as a mordant, and the pH condition is optimized to enhance binding sites of fibers and dye; and finally, dyeing at specific pH and temperature. The method successfully solves the key technical problem of poor washing fastness in natural dye dyeing, and synergistically endows the cotton fabric with excellent anti-ultraviolet performance (UPF value up to 160.3) and remarkable antibacterial function. The process disclosed by the invention is green and environment-friendly, realizes integration of dyeing and multifunctional finishing of the cotton fabrics, and has a good application prospect.

A method for coloring keratin-containing fibers, in particular such as human hair, using a natural dye based upon anthocyanins and at least one glycosylase is described. The natural dye is also described.

The application belongs to the technical field of bio-based packaging materials, and particularly relates to a novel double-layer composite film and application thereof. The novel double-layer composite film comprises the following steps: reacting palmitic anhydride and carboxymethyl cellulose to obtain carboxymethyl cellulose palmitate; adding a pH-sensitive natural dye indicator to obtain carboxymethyl cellulose palmitate nanoemulsion containing a pH-sensitive substance; then loading a natural polymer material to prepare a film material; finally adding the film material to the carboxymethyl cellulose palmitate to prepare a composite film, thereby obtaining the novel double-layer composite film. The double-layer composite film can be self-emulsified without adding a surfactant, and has the ability to load functional indicator (pH-sensitive color indicator) substances; meanwhile, the barrier performance of the film material, such as a chitosan film, to water vapor and oxygen is improved, and the double-layer composite film has a very promising application in food or fruit preservation. The method provided by the application is not only green in raw materials, but also uses a flow casting method, which can be applied to industrial production and has a good application prospect.

The invention relates to a preparation method of high-comfort ecological leather based on all-natural materials. Comprising the following steps of batch grouping, pre-soaking, fleshing and trimming, main soaking, fleshing and trimming, enzyme unhairing, liming, splitting and trimming, deliming, softening, pickling, tanning in a tara tannin extract-tea polyphenol polymer (tea pigment)-zeolite combination, wringing, shaving and buffing, rewetting and filling, fat liquoring and finishing. By adding natural and modified fatliquoring agents such as the sulfated tea oil, the sulfated cattle hoof oil and the lecithin fatliquoring agent, as well as the natural dye and the filler, the leather can obtain good softness, full hand feeling and good comfort.

The invention relates to a cosmetic agent for the non-oxidative dyeing of keratin fibers, in particular human hair, comprising two separate compositions, wherein the first composition comprises at least one glycosylated dye or dye precursor, in particular a glycosylated natural dye or natural dye precursor, and wherein the second composition comprises at least one β-glucosidase (EC 3.2.1.21). The invention further relates to a method for the non-oxidative dyeing of keratin fibers, in particular human hair, using a cosmetic agent according to the invention.

The invention discloses a high-color-depth wool fabric natural dye synergistic mordanting method which comprises the following steps: cleaning a wool fabric, removing surface impurities, and draining for later use; adding the sour papaya slices into water, heating until the sour papaya slices are boiled and then are slightly boiled, keeping the slightly boiling state, carrying out heat-preservation extraction, and filtering to obtain a sour papaya extracting solution; adding deionized water into a dyeing container according to a bath ratio, sequentially adding madder dye, a chaenomeles speciosa extracting solution and rare earth salt, and adjusting the pH value of a dye bath to 3-4; immersing the wool fabric into the dye liquor, raising the temperature to 95 DEG C, and keeping the temperature for dyeing; after the dyeing is finished, carrying out post-treatment to obtain the high-color-depth wool fabric. Through the synergistic complexing effect of the rare earth ions, polyphenol substances in the chaenomeles speciosa extracting solution and the rubia cordifolia dye, the dyeing depth and color fastness of the wool fabric are remarkably improved, and the problem that the direct dyeing depth of natural dye is insufficient is solved; the one-bath one-step method is simple in process, efficient and environment-friendly, and damage to the fibers is reduced.

A method for microwave-assisted extraction of blue indigo mud from Strobilanthes cusia belongs to the field of natural dye preparation. The method comprises the following steps: 1) mixing fresh Strobilanthes cusia leaves with water according to a specific solid-liquid ratio, and performing microwave-assisted treatment to make the indigo precursor quickly dissolve out; 2) after the extraction liquid is cooled by standing, an alkali agent is added for oxidation precipitation, and after solid-liquid separation and drying, the blue indigo mud with high indigo content is obtained. The indigo yield of the present application can reach 0.32%~0.42%, and the purity of indigo in the product is stable at more than 80%, and the highest can reach 87.49%. The method realizes efficient and rapid extraction of indigo from Strobilanthes cusia, significantly shortens the time of traditional indigo preparation process, and is simple, environment-friendly, stable in product quality, and suitable for industrial production.

The invention relates to a cosmetic product for non-oxidative dyeing of keratin fibers, in particular human hair, comprising two compositions that are separate from each other, wherein the first composition comprises at least one glycosylated dye or dye precursor, in particular glycosylated natural dye or natural dye precursor, and wherein the second composition comprises at least one β-glucosidase (EC 3.2.1.21). The invention also relates to a method for non-oxidative dyeing of keratin fibers, in particular human hair, using a cosmetic product according to the invention.

The application discloses a tie-dyeing Tibetan paper production process and relates to the papermaking technical field; in order to improve the solidification effect of dyes after tie-dyeing; including the following steps: preparing Tibetan paper for tie-dyeing, ensuring that the Tibetan paper surface is clean and wrinkle-free, and the Tibetan paper has certain toughness; folding the Tibetan paper according to the required shape, laying the Tibetan paper on the workbench surface during folding, and wearing gloves throughout the process; using a thin rope or a thread to bundle the folded Tibetan paper, adjusting the tightness of the bundling in the process, so that there are no marks on the Tibetan paper surface; putting the bundled Tibetan paper into a dye pool for dyeing, repeatedly immersing the bundled Tibetan paper into the dye pool for 2 times during the dyeing process, and the immersion time is 8-10 min each time. The Tibetan paper is tie-dyed by adopting the natural dye and the manual knotting mode, so that each tie-dyed Tibetan paper has unique characteristics.

The present application belongs to the field of textile printing and dyeing technology, and particularly relates to a method for dyeing silk fabrics with loquat leaf extract as a natural dye and using a compound fixing system to improve the dyeing fastness.

The present invention relates to a method for obtaining carminic acid from Dactylopius coccus by microwave-assisted extraction. This natural dye comes from the cochineal insect (Dactylopius coccus C.) and has a wide range of applications in the food, pharmaceutical, cosmetic, and craft industries; however, the methods currently used for its extraction are based on conventional methods involving various operations that generate high energy consumption, labor, and waste. Therefore, the present invention provides an alternative method for obtaining carminic acid from Dactylopius coccus that improves efficiency.

The utility model relates to the technical field of textile fabric dyeing, and discloses a polyester-cotton jacquard fabric dyeing device which comprises a dyeing box, a feeding roller is installed on the left side of the dyeing box, a rotor of a first motor is coaxially connected with a transmission shaft, and a hinge joint is installed on the lower side of the outer portion of the transmission shaft. The bearing frame is connected to the lower side of the front portion of the mounting plate, a swing arm is coaxially connected to the bottom end of a hinge joint, and a stirring head is coaxially connected to the bottom end of the swing arm; the rotating shaft is inserted into the assembling bracket, and the bottom end of the rotating shaft is connected with stirring blades. According to the polyester-cotton jacquard fabric dyeing device, a first motor drives a transmission shaft and a hinge joint to rotate, so that a stirring head can be driven to rotate in a conical shape through a swing arm, meanwhile, a rotating shaft and stirring blades can be driven to rotate through a first belt wheel, the laminar flow state of liquid flowing can be helped to be broken, and turbulent flow is promoted to be formed; in this way, natural dye and auxiliaries can be more effectively conveyed to all parts of the polyester-cotton jacquard fabric, and dyeing of two kinds of polyester-cotton fibers is completed at a certain temperature.

We offer crafts made from pine wood wool. [Solution] This craft uses a base material selected from materials with three-dimensional geometric structures, such as spheres, cones, cylinders, pyramids, and polyhedrons (e.g., tetrahedrons), or materials with three-dimensional structures inherent to natural materials, such as gourds and seashells. The base material is covered with pine wood wool, and embroidery is performed on the base using lily or traditional threads, such as Ezohimo (Japanese holly cords), with natural dyeing applied as needed to create unique colors. The base construction process can include a step of smoothing the surface of the base. Furthermore, chemical fibers or synthetic threads can be used in the embroidery process instead of lily or traditional threads.

The invention relates to a cosmetic product for non-oxidative dyeing of keratin fibers, in particular human hair, comprising two compositions that are separate from each other, wherein the first composition comprises at least one glycosylated dye or dye precursor, in particular glycosylated natural dye or natural dye precursor, and wherein the second composition comprises at least one β-glucosidase (EC 3.2.1.21). The invention also relates to a method for non-oxidative dyeing of keratin fibers, in particular human hair, using a cosmetic product according to the invention.

The application discloses a freshness indicating film based on cochineal carmine and a preparation method thereof, and raw materials include cochineal carmine, a pH value regulator and a polymer base film. The application composites the cochineal carmine and a biological base material with good loading performance to obtain a food freshness indicating film, utilizes the characteristics that the cochineal carmine has strong light and heat stability and can have more stable structure under a complex light and heat environment, further improves the stability of the freshness indicating film, and further improves the accuracy of color freshness monitoring and indicating effect of the freshness indicating film, and solves the problem of poor light and heat stability of the freshness indicating film of a natural dye food indicator using anthocyanin, curcumin and shikonin.

The invention discloses a method for improving color fastness of cellulose textiles dyed by phenol natural dye based on biological enzyme, and belongs to the field of natural dye dyeing. The invention provides a vitamin C-initiator-HRP (horse radish peroxidase) three-way catalytic system, which is characterized in that vitamin C free radicals are utilized to initiate cellulose to generate free radicals (alcoholic hydroxyl free radicals (Cell-O), glucose residue carbon free radicals (Cell-OH) and the like); according to the principle that a horse radish peroxidase (HRP enzyme)-initiator system initiates the natural dye to generate free radicals (phenolic hydroxyl free radicals (Ar-O), benzene ring carbon free radicals (HO-Ar) and the like), cellulose and the phenolic natural dye are subjected to free radical graft polymerization reaction, firm covalent bonds are formed between the cellulose and the phenolic natural dye, and the cellulose and the phenolic natural dye are separated from each other. The color fastness such as washing resistance, friction resistance and solarization resistance of the dyed fabric is improved.

The present invention relates to a method for obtaining carminic acid from Dactylopius coccus by ultrasound-assisted extraction. This natural dye comes from the cochineal insect (Dactylopius coccus C.) and has a wide range of applications in the food, pharmaceutical, cosmetic, and craft industries; however, the methods currently used for its extraction are based on conventional methods involving various operations that generate high energy and labor consumption and waste. Therefore, the present invention provides an alternative method for obtaining carminic acid from Dactylopius coccus that improves yield.

The invention discloses a zero-chemical-component wool fiber fabric and a preparation method thereof, and belongs to the technical field of fabrics. The wool fiber fabric is prepared by the following steps: performing protease bath on wool fiber yarns and applying a magnetic field for treatment at the same time, dyeing the pretreated wool fiber yarns with avocado kernel natural dye, and drying to obtain the zero-chemical-component wool fiber fabric. And weaving the dyed wool fiber yarns serving as warp yarns and weft yarns. Wherein the avocado kernel natural dye is obtained by taking avocado kernels as a raw material and adopting an ethanol-water-sodium carbonate extraction system for extraction, the avocado kernel natural dye is adopted for dyeing the wool fiber yarn, green and environment-friendly effects are achieved, the color of the wool fiber fabric is enriched, the color fastness is good, K / S can reach 6 or above, in addition, the strength loss of the wool fiber yarn is small, and the wool fiber yarn is good in color fastness. And the wool fiber fabric has better ultraviolet resistance.

The invention relates to a cosmetic agent for the non-oxidative dyeing of keratin fibers, in particular human hair, comprising two separate compositions, wherein the first composition comprises at least one glycosylated dye or dye precursor, in particular a glycosylated natural dye or natural dye precursor, and wherein the second composition comprises at least one β-glucosidase (EC 3.2.1.21). The invention further relates to a method for the non-oxidative dyeing of keratin fibers, in particular human hair, using a cosmetic agent according to the invention.

A composition useful for the preparation of a biodegradable material, in which its components are environmentally friendly. The composition comprises: 20 to 100 wt. % of environmentally friendly wax; 0 to 80 wt. % of environmentally friendly particles; and 0 to 20 wt. % of oils, essential oils, natural dyes or natural flavorings. The use of such composition as a material for biodegradable articles, such as a Funeral Urn.

The invention discloses a method for dyeing a green-tone textile with a natural dye, and belongs to a textile dyeing technology. The method comprises the following steps: (1) pretreatment of cotton and tussah silk: carrying out oscillation treatment on cotton fibers or fabrics, or tussah silk fibers or fabrics in warm water containing a penetrant T, then padding with a treatment solution, and then carrying out drying-baking treatment to obtain pretreated cotton fibers or fabrics, or tussah silk fibers or fabrics; (2) preparing sophora flower bud dye; (3) dyeing: dyeing the pretreated cotton or tussah silk fiber or fabric by using a sophora flower bud dye as a dye solution; and (4) preparing a green dyed product: carrying out dipping oscillation treatment on the dyed product by adopting a genipin solution to prepare the green-tone cotton or tussah silk dyed product. According to the method for preparing the green-tone and high-fastness cotton and tussah silk fabric from the natural dye, the purpose that the natural dye is firmly fixed on the cotton and the tussah silk is achieved, and meanwhile the functionality of the fabric is improved.