CN106986953B - A kind of chitosan derivatives as dispersing agent and its application in fabrics printing and dyeing - Google Patents

A kind of chitosan derivatives as dispersing agent and its application in fabrics printing and dyeing Download PDF

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CN106986953B
CN106986953B CN201710343323.4A CN201710343323A CN106986953B CN 106986953 B CN106986953 B CN 106986953B CN 201710343323 A CN201710343323 A CN 201710343323A CN 106986953 B CN106986953 B CN 106986953B
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dispersing agent
chitosan derivatives
dye
chitosan
dye composite
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CN106986953A (en
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陈艳珍
王鹏
曾桂香
张仁海
陈精明
黄海彬
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SUZHOU TANGHUA NANOTECHNOLOGY Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
    • C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
    • C08B37/0024—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid beta-D-Glucans; (beta-1,3)-D-Glucans, e.g. paramylon, coriolan, sclerotan, pachyman, callose, scleroglucan, schizophyllan, laminaran, lentinan or curdlan; (beta-1,6)-D-Glucans, e.g. pustulan; (beta-1,4)-D-Glucans; (beta-1,3)(beta-1,4)-D-Glucans, e.g. lichenan; Derivatives thereof
    • C08B37/0027—2-Acetamido-2-deoxy-beta-glucans; Derivatives thereof
    • C08B37/003—Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/16—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using dispersed, e.g. acetate, dyestuffs
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/46—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing natural macromolecular substances or derivatives thereof
    • D06P1/48—Derivatives of carbohydrates

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Textile Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
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Abstract

The invention discloses a kind of chitosan derivatives as dispersing agent and its application in fabrics printing and dyeing, chitosan derivatives structure is

Description

A kind of chitosan derivatives as dispersing agent and its application in fabrics printing and dyeing
Technical field
The invention belongs to field of printing and dyeing after textile, and in particular to the dispersing agent in a kind of dyeing, and in particular to one The chitosan derivatives and its application in fabrics printing and dyeing that kind is used as dispersing agent.
Background technique
Woven dacron accounts for 45% or more of various piece market share total values, is a kind of to apply most textiles, terylene The coloring agent of cloth is disperse dyes.Disperse dyes are a kind of hydrophobic dyes, the solid granule that stain is 1 μm of diameter or so, Since partial size is larger, resistance is larger when it being caused to react with PET fiber surface, so needing for woven dacron to be immersed in long in dye bath The reaction of time, and design on fabric surface has loose colour residual after reaction, needs repeatedly to wash on the one hand led in this way except removal floating color Cause dyeing time longer, speed of production is very slow, a large amount of discharge of wastewater is also resulted in, and disperse dyes are in dispersion system Stability mainly obtains the physical modification at dye granule interface by dispersing agent, and effect includes that the wetting of the surface of solids is made The effect to be reassociated with the splitting coalescence effect of, particle group, the scattered particle of prevention.If the partial size of discrete particles reduces, The interface energy increment of dispersion increases therewith, and system can make particle reassociate in thermodynamic instability state.If will The partial size of disperse dyes reduces, since the active force between existing dispersing agent and dyestuff particle interface is not high, after dye granule dispersion It is easy to reassociate.
Small molecular surfactant easily aligns on material surface, reduces interfacial tension and is primarily used for dispersion In system, but its hydrophilic radical is not firm in low polar particle surface combination, and lipophilic group carbon chain lengths are short, space steric effect Deficiency, so that small molecule dispersing agent easily desorbs from particle surface and scattered particle is caused to be assembled again.
Although high molecular surfactant, which permeates wetting action, is not so good as Small molecular surfactant, macromolecule surface is living Property agent be once adsorbed in solid/liquid interfaces, then the group of a part of close solid in strand or link can tile in solid/liquid interfaces And adsorb, so that macromolecular chain is anchored at the surface of solids, and another part lyophily chain is then directed toward liquid phase, forms cyclic annular or shape of tail parent Liquid layer makes the retention layer between solid thicken, and moves outside slip flow regime, to generate solid more higher than Small molecular surfactant Energy barrier and electric energy are built, more effective peptizaiton.
In addition, according to statistics, 150,000 tons of dispersing agent is contained in the waste water that China's conventional dyeing process discharges every year.For reality Existing non-wastewater discharge reduces pollution of the dyeing waste-water to environment, and what padding type dyed, which rolls extraction raffinate, need to return to dyestuff slot, all dye liquors It is brought on cloth, but padding type dyeing has that one is difficult to break through, and has exactly just prepared in solution all the time, When starting dyeing, the concentration of dyestuff is higher, and at this time undyed cloth immerses in solution, contaminates in the solution that cloth absorbs The ratio of material and water is higher than the ratio for remaining in the dyestuff of solution and water in dipping tank, and rolls the ratio of dyestuff in extraction raffinate more It is low, and making full use of for the feature of environmental protection and chemical raw material, rolling extraction raffinate again cannot abandon, and can only reenter dipping tank, in this way Continuous dyestuff, the specific gravity of dyestuff constantly declines in solution, and it is less to will cause dyestuff in the solution that the cloth of subsequent dyeing absorbs, dye The color of color is shallower, the uneven color for causing front and back to dye.
Chinese invention patent discloses CN105949349A and discloses a kind of chitosan-based hyper-dispersant and preparation method thereof, Structure are as follows:
In formula (1), R1、R2It is independently selected from Formulas I a, Formulas I b and Ic:
R4、R5、R6It is independently selected from H, Cl, Br, NO2、OH、CH3、OCH3；M is H or alkali metal；X be 10%~ 90%；Y is 0~50%；Z is 5%~50%；Its chitosan-based hyper-dispersant provided can produce enough steric hindrances to rise To effective stabilization and solves the dispersion of the low polarity organic pigment of condensed-nuclei aromatics class in water.However, using should The dyeing that the dye liquor of dispersing agent carries out cloth equally exists front and back dyeing unevenly, and dyed cloth material has color difference.
Summary of the invention
The technical problem to be solved by the present invention is to by providing a kind of chitosan derivatives as dispersing agent, a side Face, it is ensured that stability of the disperse dyes in dispersion system realizes that the partial size of dye granule is thinner, with shorten coloring when Between, so that it is not generated loose colour, on the other hand, the uneven color that front and back is dyed when solving to carry out padding type dyeing to cloth is asked Topic.
In order to solve the above technical problems, a kind of technical solution that the present invention takes is as follows:
A kind of chitosan derivatives as dispersing agent, structural formula are as follows:
In formula, M is alkali metal；The relative molecular mass of the chitosan derivatives as dispersing agent be 5500~ 10000。
In certain specific embodiments of the invention, the alkali metal is sodium and/or potassium.
In certain specific embodiments of the invention, the above-mentioned chitosan derivatives as dispersing agent pass through following step Rapid preparation:
(1), it adds chitosan into the acetic acid aqueous solution that concentration is 3~5mol/L, after stirring 10~50min, is added 3- hydracrylic acid after being heated to 45~55 DEG C, keeps 2~3h of thermotonus, is then added sodium carbonate, adjust pH=7.5~ 9.0, it is filtered after having Precipitation, obtains solid A；
(2), it takes the solid A and pyridine to mix, is added in reaction vessel, adjusting cryostat temperature is -15~-5 DEG C, is protected It holds temperature and chlorosulfonic acid is added dropwise, after completion of dropwise addition, solution is transferred under normal temperature environment after reacting 3~4h, is restored to solution After room temperature, the rotary evaporation at 120 ± 5 DEG C obtains solid B；
(3), the solid B is soluble in water, alkali carbonate is added, is heated to 60 ± 5 DEG C of 10~50min of stirring Afterwards, the crystallisation by cooling at -15~-5 DEG C obtains white crystal, the as described chitosan derivatives for being used as dispersing agent.
Wherein, the relative molecular mass that chitosan uses Nantong Lv Shen bioengineering Co., Ltd to produce for 3000~ 5000, the water soluble chitosan of deacetylation > 90%.
In certain specific embodiments of the invention, in step (1), the chitosan and 3- hydracrylic acid feed intake Mass ratio is 1:0.55~0.63.
In certain specific embodiments of the invention, the solid A, pyridine, chlorosulfonic acid, alkali carbonate feed intake Mass ratio is 1:4.9~5.9:0.6~0.65:1~1.1.
Another technical solution provided by the invention: one kind chitosan derivatives as dispersing agent described above are being weaved Application in product printing and dyeing.
Another technical solution provided by the invention: a kind of dye composite includes dyestuff and water, and the dye composite is also Including the chitosan derivatives as dispersing agent as described above, the chitosan derivatives as dispersing agent are described Mass content in dye composite is 1~2%.
Preferably, the dyestuff is disperse dyes, and the mass content in dye composite is 2~5%；Dye combinations Object also includes to account for the lauryl sodium sulfate and the quality for accounting for dye composite that the mass content of dye composite is 3~5% The glycerol that content is 2~3%.
A kind of preparation method of the aforementioned dye composite, are as follows: by the disperse dyes, dodecyl sulphate Sodium, glycerol, the chitosan derivatives as dispersing agent, water mixing, stir into suspension, are finally putting into grinder and are ground to point Dissipate dye granule partial size be 30~50nm, be finally diluted with water to get.
Another technical solution provided by the invention: the method that a kind of pair of cloth is dyed, including by the cloth after desizing Immerse 1~20min in dye composite as described above.
Preferably, relative molecular mass of the present invention is weight average molecular weight.It is further preferred that of the present invention opposite Molecular mass is measured by mass spectrography.
Due to the use of above technical scheme, the invention has the following advantages over the prior art:
1, the present invention solves non-uniform technical problem before and after the existing color dyed of dyeing, by poly- in shell Scion grafting hydrophilic radical on the branch of sugar, and unprotected side chain on branch make it easier in insertion water, and form neat arrangement, Than stronger in conjunction with water, the polyether structure of chitosan ability can be combined with dyestuff, thus can dyestuff and water it Between formed a bridge beam action, can not only keep the stabilization of dispersion that can also keep the steady of the ratio of dyestuff and water It is fixed, guarantee that the ratio of dyestuff and water is identical with the ratio of dyestuff and water in dipping tank in the solution of cloth absorption, guarantees cloth dye Color before and after color is uniform.
2, the polyether structure contained due to chitosan itself compatibility similar with the structure of dyestuff itself, mutual Preferably, the dye composite that chitosan system high molecular surfactant of the invention and other small molecule dispersing agents prepare, The wetting action of the stain surface of solids and the splitting coalescence effect of particle group are played by small molecule dispersing agent, and are used as dispersing agent Chitosan derivatives play the role of that scattered particle is prevented to reassociate, and guarantee the stabilization of superfine disperse dye system, make to surpass Finely divided dyestuff can be applied to industrialization, make it possible padding type rapid dyeing.
3, since chitosan is natural material, so dispersing agent property harmless to the human body, will not pollute environment, In addition the hydroxyl and amino abundant itself having can be combined with the aliphatic radical of terylene cloth fiber surface, and be had into Film property reduces loose colour, realizes the dyeing of quick padding type, cloth so may also aid in the surface that dyestuff is firmly attached to fiber After material contact dyestuff, extra moisture is dried, finished product can be obtained in drying at a certain temperature, impregnates and more without prolonged Secondary washing, dyeing kinetics reach as high as 1m/s；This dispersing agent that can be combined with fiber surface activity group itself It uses, can also reduce the discharge of organic matter in dyeing Liquid Residue, reduce the pollution to environment.
Specific embodiment
In production process of printing and dyeing after existing textile, it is contemplated that social and environmental problems, idea of save the cost etc., It needs to roll extraction raffinate and puts into dipping tank again and recycled, but the color before and after bring is when causing dyeing simultaneously There can be larger difference, be based on this, applicant proposes a kind of chitosan derivatives as dispersing agent through numerous studies, can be Above-mentioned technical problem is solved to a certain extent, and has reached extremely excellent technical effect.
A kind of chitosan derivatives as dispersing agent, structural formula are as follows:
In formula, M is alkali metal；The relative molecular mass of the chitosan derivatives as dispersing agent be 5500~ 10000。
The alkali metal is sodium and/or potassium.
Invention is further explained combined with specific embodiments below.
Embodiment one:
By 100g chitosan (chitosan use Nantong Lv Shen bioengineering Co., Ltd produce relative molecular mass for 3000~5000, the water soluble chitosan of deacetylation > 90%) it is added to the 500ml acetic acid aqueous solution that concentration is 3mol/L In, after stirring 30min, the 3- hydracrylic acid of 55g is added, after being heated to 50 DEG C, keeps thermotonus 3h, sodium carbonate is then added PH=8 is adjusted, is filtered after having Precipitation, obtains solid A.
100g solid A and 500ml pyridine is taken, is added in three-necked flask, adjusting cryostat temperature is -10 DEG C, keeps temperature And the chlorosulfonic acid of 60g is added dropwise, after completion of dropwise addition, 3h is reacted, then solution is transferred under normal temperature environment, restores normal to solution Wen Hou obtains solid B in 120 DEG C of rotary evaporations, and solid B is dissolved in 500ml water, and the sodium carbonate of 100g is added, and is heated to 60 DEG C After stirring 30min, in -10 DEG C of crystallisation by cooling, white crystal is obtained, is solid C, chitosan derivatives as of the present invention.
The nuclear magnetic data of solid C are as follows:
1H-NMR (400Hz, DMSO-d6) δ (ppm) 1.84 (d, 1H), 2.0 (d, 3H), 2.44 (s, 2H), 3.13 (s, 1H), 3.55 (s, 1H), 3.92 (s, 2H), 4.18 (s, 1H), 4.21 (s, 2H), 5.18 (s, 1H).
Weight average molecular weight through mass spectrometric determination solid C is about 7337.9.
The preparation of dye composite: disperse dyes, lauryl sodium sulfate, glycerol, solid C are mixed, adds water and stirs, matches Be made suspension (disperse dyes, lauryl sodium sulfate, glycerol, solid C mass content be respectively 20%, 30%, 20% and 10%) 30~50nm of partial size that grinder is ground to disperse dyes granule, is added, adds water and is diluted to disperse dyes, dodecane Base sodium sulphate, glycerol, solid C mass content be respectively 2%, 3%, 2% and 1%, it is spare.
Wherein disperse dyes select Disperse Red 3B (commercially available).
Upper dye: the cloth after cutting mono- piece of desizing of 25*15cm immerses in dye composite, takes out after impregnating 1min, with rolling Vehicle dries, and is then placed in baking oven sample 1 obtained by drying#, test its color fastness.
Embodiment two:
By 100g chitosan (chitosan use Nantong Lv Shen bioengineering Co., Ltd produce relative molecular mass for 3000~5000, the water soluble chitosan of deacetylation > 90%) it is added to the 550ml acetic acid aqueous solution that concentration is 4mol/L In, after stirring 30min, the 3- hydracrylic acid of 60g is added, after being heated to 55 DEG C, keeps thermotonus 2h, sodium carbonate is then added PH=8.5 is adjusted, is filtered after having Precipitation, obtains solid A.
100g solid A and 500ml pyridine is taken, is added in three-necked flask, adjusting cryostat temperature is -11 DEG C, keeps temperature And the chlorosulfonic acid of 63.5g is added dropwise, after completion of dropwise addition, 3h is reacted, then solution is transferred under normal temperature environment, restored to solution After room temperature, the rotary evaporation at 121 DEG C obtains solid B, and solid B is dissolved in 500ml water, and the sodium carbonate of 110g is added, is heated to After 65 DEG C of stirring 35min, in -10 DEG C of crystallisation by cooling, white crystal is obtained, is solid C, chitosan derivatives as of the present invention.
The preparation of dye composite: disperse dyes, lauryl sodium sulfate, glycerol, solid C are mixed, adds water and stirs, matches Be made suspension (disperse dyes, lauryl sodium sulfate, glycerol, solid C mass content be respectively 24%, 32%, 20%, 12%) 30~50nm of partial size that grinder is ground to disperse dyes granule, is added, adds water and is diluted to disperse dyes, dodecane Base sodium sulphate, glycerol, solid C mass content be respectively 3%, 4%, 2.5% and 1.5%, it is spare.
Wherein disperse dyes select disperse yellow G (commercially available).
Upper dye: the cloth after cutting mono- piece of desizing of 25*15cm immerses in dye composite, takes out after impregnating 1min, with rolling Vehicle dries, and is then placed in baking oven sample 2 obtained by drying#, test its color fastness.
Embodiment three:
By 100g chitosan (chitosan use Nantong Lv Shen bioengineering Co., Ltd produce relative molecular mass for 3000~5000, the water soluble chitosan of deacetylation > 90%) it is added to the 500ml acetic acid aqueous solution that concentration is 5mol/L In, after stirring 35min, the 3- hydracrylic acid of 63g is added, after being heated to 50 DEG C, keeps thermotonus 2h, sodium carbonate is then added PH=7.8 is adjusted, is filtered after having Precipitation, obtains solid A.
100g solid A and 600ml pyridine is taken, is added in three-necked flask, adjusting cryostat temperature is -10 DEG C, keeps temperature And the chlorosulfonic acid of 65g (0.54mol) is added dropwise, after completion of dropwise addition, 2.5h is reacted, then solution is transferred under normal temperature environment, After solution restores room temperature, in 119 DEG C of rotary evaporations, solid B is obtained, solid B is dissolved in 500ml water, the carbonic acid of 100g is added Sodium, in -9 DEG C of crystallisation by cooling, obtains white crystal after being heated to 58 DEG C of stirring 40min, is solid C, chitosan as of the invention Derivative.
The preparation of dye composite: disperse dyes, lauryl sodium sulfate, glycerol, solid C are mixed, adds water and stirs, matches Be made suspension (disperse dyes, lauryl sodium sulfate, glycerol, solid C mass content be respectively 30%, 30%, 18% and 12%) 30~50nm of partial size that grinder is ground to disperse dyes granule, is added, adds water and is diluted to disperse dyes, dodecane Base sodium sulphate, glycerol, solid C mass content be respectively 5%, 5%, 3% and 2%, it is spare.
Wherein disperse dyes select disperse blue G (commercially available).
Upper dye: the cloth after cutting mono- piece of desizing of 25*15cm immerses in dye composite, takes out after impregnating 1min, with rolling Vehicle dries, and is then placed in baking oven sample 3 obtained by drying#, test its color fastness.
Example IV:
By 100g chitosan (chitosan use Nantong Lv Shen bioengineering Co., Ltd produce relative molecular mass for 3000~5000, the water soluble chitosan of deacetylation > 90%) it is added to the 500ml acetic acid aqueous solution that concentration is 3mol/L In, after stirring 30min, the 3- hydracrylic acid of 55g is added, after being heated to 50 DEG C, keeps thermotonus 3h, sodium carbonate is then added PH=8 is adjusted, is filtered after having Precipitation, obtains solid A.
100g solid A and 500ml pyridine is taken, is added in three-necked flask, adjusting cryostat temperature is -10 DEG C, keeps temperature And the chlorosulfonic acid of 63.5g (0.54mol) is added dropwise, after completion of dropwise addition, 3h is reacted, then solution is transferred under normal temperature environment, After solution restores room temperature, in 120 DEG C of rotary evaporations, solid B is obtained, solid B is dissolved in 500ml water, the carbonic acid of 100g is added Sodium, in -10 DEG C of crystallisation by cooling, obtains white crystal after being heated to 63 DEG C of stirring 30min, is solid C, and shell as of the invention is poly- Sugar derivatives.
The preparation of dye composite: disperse dyes, lauryl sodium sulfate, glycerol, solid C are mixed, adds water and stirs, matches Be made suspension (disperse dyes, lauryl sodium sulfate, glycerol, solid C mass content be respectively 20%, 30%, 20% and 10%) 30~50nm of partial size that grinder is ground to disperse dyes granule, is added, adds water and is diluted to disperse dyes, dodecane Base sodium sulphate, glycerol, solid C mass content be respectively 2%, 3%, 2% and 1%, stand 48h after, again after mixing evenly It is spare.
Wherein disperse dyes select Disperse Red 3B (commercially available).
Upper dye: the cloth after cutting mono- piece of desizing of 25*15cm immerses in dye composite, takes out after impregnating 1min, with rolling Vehicle dries, and is then placed in baking oven sample 4 obtained by drying#, test its color fastness.
Embodiment five:
Dye composite is prepared in the way of embodiment one.Wherein disperse dyes select Disperse Red 3B (commercially available).
Upper dye: prepared dye composite is poured into dipping tank, the cloth after making desizing, immerses dye composite In, pass through roll compacting and drying after dipping tank respectively out, after cloth goes out baking oven, after 1 meter of leftover of bolt of cloth for dismissing leading portion, cuts one piece of sample For sample 5#, after 100 meters of continuous production, then cutting one piece of sample is sample 6#, test 5#With 6#Color difference be 0 grade.
Comparative example 1:
Disperse dyes, lauryl sodium sulfate, glycerol are added water and stirred, suspension (disperse dyes, dodecyl are configured to Sodium sulphate, glycerol mass content be respectively 20%, 30% and 20%), the grain that grinder is ground to disperse dyes granule is added 30~50nm of diameter, being diluted with water to disperse dyes, lauryl sodium sulfate, the mass content of glycerol is respectively 2%, 3% and 2%, it is again spare after mixing evenly after standing 48h.
Wherein disperse dyes select Disperse Red 3B (commercially available).
Upper dye: the cloth after cutting mono- piece of desizing of 25*15cm immerses in dye composite, takes out after impregnating 1min, with rolling Vehicle dries, and is then placed in baking oven sample 7 obtained by drying#, test its color fastness.
Comparative example 2:
Commercial dye Disperse Red 3B (commercially available) is configured to the dye liquor that dyestuff mass fraction is 2%, 500ml dye liquor is taken, adds Heat to 120 DEG C, cut mono- piece of desizing of 25*15cm after cloth, immerse dye liquor in, stir 6h after, dried with padding machine, then rushed with water After washing twice, it is put into baking oven drying and both obtains sample 8#, test its color fastness.
Comparative example 3:
Be by number of patent application the dispersing agent of 10kg is prepared in the way of 201610308701.0 patents provide, and according to The identical method of embodiment 1 prepares dye composite, wherein the quality of disperse dyes, lauryl sodium sulfate, glycerol, dispersing agent Content is respectively 2%, 3%, 2%, 1%, spare.
Upper dye: prepared solution is poured into dipping tank, the cloth after making desizing, is immersed in dye composite, is soaked out Pass through roll compacting and drying after stain slot respectively, after cloth goes out baking oven, after 1 meter of leftover of bolt of cloth for dismissing leading portion, cutting one piece of sample is sample 9#, after 100 meters of continuous production, then cutting one piece of sample is sample 10#, test 9#With 10#Color difference be 2 grades.
Testing standard and testing result:
Sample Washing is executed according to national standard GB/T 5713-2013, and the colorfastness to rubbing of sample is according to GB/T 3920-2008 is executed.Test result is as follows:
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention, it is all according to the present invention Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.

Claims (10)

1. a kind of chitosan derivatives as dispersing agent, which is characterized in that its structural formula are as follows:
In formula, M is alkali metal；The relative molecular mass of the chitosan derivatives is 5500~10000.
2. the chitosan derivatives according to claim 1 as dispersing agent, which is characterized in that the alkali metal is sodium And/or potassium.
3. the chitosan derivatives according to claim 1 as dispersing agent, which is characterized in that the chitosan derivative Object is prepared by following steps:
(1), it adds chitosan into the acetic acid aqueous solution that concentration is 3~5mol/L, after stirring 10~50min, 3- hydroxyl is added Base propionic acid after being heated to 45~55 DEG C, keeps 2~3h of thermotonus, sodium carbonate is then added, adjusts pH=7.5~9.0, have It is filtered after Precipitation, obtains solid A；
(2), it takes the solid A and pyridine to mix, is added in reaction vessel, adjusting cryostat temperature is -15~-5 DEG C, keeps temperature Chlorosulfonic acid is spent and be added dropwise, after completion of dropwise addition, solution is transferred under normal temperature environment after reacting 3~4h, restores room temperature to solution Afterwards, the rotary evaporation at 120 ± 5 DEG C, obtains solid B；
(3), the solid B is soluble in water, alkali carbonate is added, after being heated to 60 ± 5 DEG C of 10~50min of stirring, in- Crystallisation by cooling at 15~-5 DEG C obtains white crystal, the as described chitosan derivatives for being used as dispersing agent.
4. the chitosan derivatives according to claim 3 as dispersing agent, which is characterized in that described in step (1) The mass ratio that feeds intake of chitosan and 3- hydracrylic acid is 1:0.55~0.63.
5. the chitosan derivatives according to claim 3 as dispersing agent, which is characterized in that the solid
A, the mass ratio that feeds intake of pyridine, chlorosulfonic acid, alkali carbonate is 1:4.9~5.9:0.6~0.65:1~1.1.
6. the chitosan derivatives as dispersing agent as described in any one of claims 1 to 5 claim are printed in textile Application in dye.
7. a kind of dye composite includes dyestuff and water, which is characterized in that the dye composite further includes such as claim 1 To the chitosan derivatives for being used as dispersing agent described in any one of 5 claims, the chitosan as dispersing agent spreads out Mass content of the biology in the dye composite is 1~2%.
8. dye composite according to claim 7, which is characterized in that the dyestuff is disperse dyes, in the dye Mass content in feed composition is 2~5%；The dye composite also includes the mass content for accounting for the dye composite For 3~5% lauryl sodium sulfate and to account for the mass content of the dye composite be 2~3% glycerol.
9. dye composite according to claim 8, which is characterized in that the dye composite the preparation method comprises the following steps: will The disperse dyes, lauryl sodium sulfate, glycerol, the chitosan derivatives as dispersing agent, water mixing, stir into suspended Liquid, be finally putting into be ground in grinder disperse dyes granule partial size be 30~50nm, be finally diluted with water to get.
10. the method that a kind of pair of cloth is dyed, it is characterised in that: including the cloth after desizing is immersed such as claim 7 1~20min into dye composite described in any one of 9 claims.
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