CN115785303B - Sulfonated carboxymethyl tamarind gum and preparation method and application thereof - Google Patents
Sulfonated carboxymethyl tamarind gum and preparation method and application thereof Download PDFInfo
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- 235000004298 Tamarindus indica Nutrition 0.000 title claims abstract description 60
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 240000004584 Tamarindus indica Species 0.000 title description 2
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 72
- 241000596504 Tamarindus Species 0.000 claims abstract description 58
- 238000007639 printing Methods 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000003054 catalyst Substances 0.000 claims abstract description 6
- 239000004744 fabric Substances 0.000 claims description 24
- 229920000742 Cotton Polymers 0.000 claims description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 14
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000003153 chemical reaction reagent Substances 0.000 claims description 9
- FDRCDNZGSXJAFP-UHFFFAOYSA-M sodium chloroacetate Chemical group [Na+].[O-]C(=O)CCl FDRCDNZGSXJAFP-UHFFFAOYSA-M 0.000 claims description 7
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 claims description 6
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical group OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 claims description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 238000009990 desizing Methods 0.000 claims description 5
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 238000006386 neutralization reaction Methods 0.000 claims description 4
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 4
- BWYYYTVSBPRQCN-UHFFFAOYSA-M sodium;ethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=C BWYYYTVSBPRQCN-UHFFFAOYSA-M 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims 1
- 238000006467 substitution reaction Methods 0.000 abstract description 22
- 230000000052 comparative effect Effects 0.000 description 16
- 239000000203 mixture Substances 0.000 description 13
- 238000006277 sulfonation reaction Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- -1 polysaccharide compounds Chemical class 0.000 description 9
- 239000000047 product Substances 0.000 description 8
- 239000004753 textile Substances 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 229920001282 polysaccharide Polymers 0.000 description 6
- 239000005017 polysaccharide Substances 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 229960000583 acetic acid Drugs 0.000 description 4
- 239000000975 dye Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 244000061456 Solanum tuberosum Species 0.000 description 3
- 235000002595 Solanum tuberosum Nutrition 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 3
- FOCAUTSVDIKZOP-UHFFFAOYSA-N chloroacetic acid Chemical compound OC(=O)CCl FOCAUTSVDIKZOP-UHFFFAOYSA-N 0.000 description 3
- 229940106681 chloroacetic acid Drugs 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000012362 glacial acetic acid Substances 0.000 description 3
- 150000004676 glycans Chemical class 0.000 description 3
- 229920000578 graft copolymer Polymers 0.000 description 3
- 238000007641 inkjet printing Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229920001661 Chitosan Polymers 0.000 description 2
- SRBFZHDQGSBBOR-IOVATXLUSA-N D-xylopyranose Chemical compound O[C@@H]1COC(O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-IOVATXLUSA-N 0.000 description 2
- 238000005481 NMR spectroscopy Methods 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 229920002000 Xyloglucan Polymers 0.000 description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 2
- 125000003368 amide group Chemical group 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- GAWIXWVDTYZWAW-UHFFFAOYSA-N C[CH]O Chemical group C[CH]O GAWIXWVDTYZWAW-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 229920002752 Konjac Polymers 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- PYMYPHUHKUWMLA-UHFFFAOYSA-N arabinose Natural products OCC(O)C(O)C(O)C=O PYMYPHUHKUWMLA-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- SRBFZHDQGSBBOR-UHFFFAOYSA-N beta-D-Pyranose-Lyxose Natural products OC1COC(O)C(O)C1O SRBFZHDQGSBBOR-UHFFFAOYSA-N 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 230000021523 carboxylation Effects 0.000 description 1
- 238000006473 carboxylation reaction Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000986 disperse dye Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229930182830 galactose Natural products 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 229920000591 gum Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 235000010485 konjac Nutrition 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229910000403 monosodium phosphate Inorganic materials 0.000 description 1
- 235000019799 monosodium phosphate Nutrition 0.000 description 1
- 238000000655 nuclear magnetic resonance spectrum Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000000985 reactive dye Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Abstract
The invention provides sulfonated carboxymethyl tamarind gum, a preparation method and application thereof. The sulfonated carboxymethyl tamarind gum provided by the invention comprises the following raw materials in parts by weight: 100 parts of tamarind gum, 5-30 parts of sulfonating agent, 0.1-0.5 part of depolymerizing agent, 5-30 parts of etherifying agent, 3-20 parts of catalyst and 60-150 parts of water. The sulfonated carboxymethyl tamarind of the present invention has low viscosity, low substitution degree, high paste eliminating rate, high printing definition and high color yield.
Description
Technical Field
The invention belongs to the technical field of digital printing cotton fabric pretreatment agents, and relates to sulfonated carboxymethyl tamarind gum, a preparation method and application thereof.
Background
The digital printing is to obtain digital graphic materials through network, scanning, photographing, software drawing and the like, edit according to design requirements to obtain printing design manuscripts, convert the printing design manuscripts into electronic instructions through digital printing software, spray ink on the pretreated fabric according to requirements by a printing system, and process and finish to obtain printing products. When digital printing is performed by using reactive dye ink, the alkaline condition required by the combination of dye and cotton fiber cannot be realized in the ink alone due to the limitation of digital printing equipment, and the self viscosity of the dye ink cannot be too high, which leads to easy permeation of the ink on the surface of the fabric, so that the fabric must be subjected to better pretreatment.
China is the country currently producing the most digital printed textiles. On-demand printing and personalized customization are future development trends, and the influence on the digital printing or digital printing market of textiles is increased, so that the development of the inkjet printing technology is promoted strongly. The price and the technical cost of digital printing consumables are gradually reduced, for example, the price of active ink is reduced, the lower production and operation cost is necessary to promote the increase of market share of the industry, and simultaneously, higher requirements are also provided for matched auxiliary agents.
Tamarind, also known as tamarind, sour bean, belongs to a tall evergreen arbor, native to africa, and is now widely planted in tropical and subtropical areas, where the yields in india and thailand are large. The cloud south of China also has rich tamarind resources. Tamarind gum, commonly referred to as tamarind kernel powder (Tamarind Kernel Powder, TKP), is an off-white powder made from tamarind seeds. The tamarind gum contains tamarind polysaccharide (Tamarind seed polysaccharide, TSP) as main component, and accounts for more than 65%. Tamarindus indica polysaccharide belongs to xyloglucan (xyloglucan) in hemicellulose, and has a main chain of a molecular structure of beta-D-1, 4-linked glucose, and side chains of alpha-D-1, 6-linked xylose and beta-D-1, 2-linked galactose. The tamarind gum is easy to disperse in cold water, and is dissolved by heating, so that the tamarind gum has higher viscosity. The tamarind gum can also be used as a printing and dyeing thickener in the textile industry.
CN102978971B discloses a disperse dye printing paste which is formed by compounding hydroxyethyl modified tamarind gum, sodium carboxymethyl cellulose, konjak gum, sodium hexametaphosphate, anhydrous sodium sulfate and sodium dihydrogen phosphate. The above patent mentions a method for producing hydroxyethyl-modified tamarind gum by solvent method, but does not mention the degree of substitution and the range of substitution.
CN109235088A discloses a digital printing method for increasing the printing color depth of cotton fabrics, which comprises the steps of firstly pretreating cotton fabrics by using a digital printing pretreatment sizing agent containing carboxylated polysaccharide compounds or carboxylated polyol compounds, and then carrying out ink-jet printing on the pretreated cotton fabrics. According to the invention, the carboxyl polysaccharide (alcohol) compound is used as the textile digital printing paste for pretreatment of cotton textile, and the carboxyl polysaccharide (alcohol) compound has high viscosity, good rheological property and lower water holding property, so that the dye is more combined with the fiber, the surface color of the textile is deep, and the dye and the fiber are chemically bonded, so that the friction fastness, especially the wet friction fastness, of the cotton textile is better, the effect of improving the depth of digital printing color is achieved, and meanwhile, urea is not added, and the influence of ammonia nitrogen of urea on the environment is reduced. However, the invention does not mention the substitution range of carboxylation.
CN110409199a discloses an active digital printing primer and a preparation method thereof, wherein the digital printing primer comprises the following components in percentage by weight: 1.5 to 2.5 percent of potato graft copolymer starch, 1 to 2 percent of polyurethane acrylic ester, 4 to 8 percent of cosolvent, 1.5 to 3 percent of sodium acetate, 1.5 to 3 percent of sodium silicate, 0.72 to 2 percent of water-soluble cationic chitosan quaternary ammonium salt and the balance of water. The active primer has good stability and high pasting rate by matching the potato graft copolymer starch and the polyurethane acrylic ester, and improves the K/S value and the infiltration rate of the printing slurry; the color fastness, especially the washing fastness of the system can be obviously improved by adding sodium acetate, sodium silicate and water-soluble chitosan quaternary ammonium. However, the invention does not mention the degree of grafting and the water solubility of potato graft copolymer starch as the main ingredient.
CN114000364a discloses an active digital printing pretreatment agent for pure cotton knitted fabric and a preparation method thereof. The active digital printing pretreatment agent for the pure cotton knitted fabric comprises the following components in percentage by total weight: 5-15 wt% HPMC, 5-15 wt% HEC, 10-20 wt% modified sodium carboxymethylcellulose, 40-78 wt% sodium sulphate, 1.5-7 wt% modifier dispersion and 0.5-3 wt% penetrant. The active digital printing pretreatment agent for the pure cotton knitted fabric has the advantage of high stability of base paste, has the characteristics of high color yield, high uniformity, high definition and the like when being applied to an active digital printing process of the cotton knitted fabric, and particularly has high back transparency of printing. However, the invention uses more high-cost alcohol washing modified cellulose ether, and the cost performance is lower.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the sulfonated carboxymethyl tamarind gum, the preparation method and the application thereof, and the sulfonated carboxymethyl tamarind gum has low gum, low substitution degree, high paste removal rate when being used for the pretreatment agent of the digital printing cotton fabric, high printing definition and high color yield.
To achieve the purpose, the invention adopts the following technical scheme:
the invention aims at providing sulfonated carboxymethyl tamarind gum, which comprises the following raw materials in parts by weight:
the invention uses water as solvent, greatly reduces the production cost and environmental protection pressure, the prepared sulfonated carboxymethyl tamarind gum has the carboxymethyl substitution degree range of 0.1-0.3, the sulfogroup substitution degree range of 0.1-0.3, belongs to products with lower substitution degree, has lower consumption of etherifying agent and sulfonating agent, simultaneously reduces the reaction requirement, and has high desizing rate, high printing definition and high color yield when used for the pretreatment agent of digital printing cotton fabrics.
Specifically, the sulfonated carboxymethyl tamarind gum comprises the following raw materials in parts by weight:
the weight part of tamarind gum is 100 parts.
The sulfonation agent is 5 to 30 parts by weight, for example, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, and the like.
The depolymerizing agent is 0.1 to 0.5 parts by weight, for example, 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, and the like.
The etherifying agent is 5 to 30 parts by weight, for example, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, or the like.
The catalyst is 3 to 20 parts by weight, for example, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.
The water is 60 to 150 parts by weight, for example, 60 parts, 65 parts, 70 parts, 75 parts, 80 parts, 85 parts, 90 parts, 95 parts, 100 parts, 105 parts, 110 parts, 115 parts, 120 parts, 125 parts, 130 parts, 135 parts, 140 parts, 145 parts, 150 parts, or the like.
In the invention, the sulfonating agent is 2-acrylamido-2-methylpropanesulfonic acid and/or sodium vinylsulfonate. The 2-acrylamido-2-methylpropanesulfonic acid and/or sodium vinylsulfonate are used as the sulfonating reagent, and compared with other sulfonating reagents, the sulfonating reagent used in the invention has mild reaction and easily controlled reaction process. If the amount of the sulfonation reagent is too small, the sulfonation degree is insufficient; if the amount of the sulfonation reagent is too large, raw materials are wasted and the reaction efficiency is reduced.
In the invention, the depolymerizing agent is hydrogen peroxide and/or sodium persulfate. Hydrogen peroxide and/or sodium persulfate are used as depolymerization agents, if the addition amount of the depolymerization agents is too large, the viscosity is low, and if the addition amount of the depolymerization agents is too small, the viscosity is high.
In the invention, the etherifying agent is sodium chloroacetate and/or chloroacetic acid. Sodium chloroacetate and/or chloroacetic acid is used as an etherifying agent, and if the addition amount of the etherifying agent is too small, the substitution degree of carboxymethyl is too low; if the addition amount of the etherifying agent is too large, the cost is increased.
In the invention, the catalyst is sodium hydroxide and/or potassium hydroxide.
The second purpose of the invention is to provide a preparation method of the sulfonated carboxymethyl tamarind gum, which comprises the following steps: mixing tamarind gum with water according to a proportion, adding a sulfonating reagent, a depolymerizing agent, an etherifying agent and a catalyst for reaction, cooling after the reaction is finished, adding acid for neutralization, and vacuum drying to obtain sulfonated carboxymethyl tamarind gum.
Wherein the reaction time is 1-3 hours, for example 1 hour, 1.5 hours, 2 hours, 2.5 hours, 3 hours; the reaction temperature is 50-80 ℃, for example 50 ℃, 55 ℃, 60 ℃,65 ℃,70 ℃, 75 ℃ or 80 ℃, etc.
Wherein the temperature is 35-45deg.C, such as 35deg.C, 36deg.C, 37deg.C, 38deg.C, 39deg.C, 40deg.C, 41, 42, 43deg.C, 44 deg.C or 45deg.C.
Wherein acetic acid is adopted for neutralization by adding acid.
The invention further aims to provide an application of the sulfonated carboxymethyl tamarind gum in the pretreatment agent of digital printing cotton fabrics. The sulfonated carboxymethyl tamarind gum is used for cotton fabric pretreatment agent, and has excellent desizing rate and lower cost.
Compared with the prior art, the invention has the beneficial effects that:
the sulfonated carboxymethyl tamarind of the present invention has low viscosity, low substitution degree, high paste eliminating rate, high printing definition and high color yield. Specifically, the carboxymethyl substitution degree of the sulfonated carboxymethyl tamarind gum prepared by the invention ranges from 0.1 to 0.3, the substitution degree of the sulfonic group ranges from 0.1 to 0.3, the sulfonated tamarind gum belongs to a product with lower substitution degree, the usage amount of etherifying agent and sulfonating agent is lower, and the reaction requirement is reduced at the same time; the viscosity of the prepared pretreatment agent is 370-610cp, the de-pasting rate is 99.0-99.3%, the printing definition is high, and the color yield is high.
Drawings
FIG. 1 is a nuclear magnetic hydrogen spectrum of a raw material tamarind gum of the present invention;
FIG. 2 is a nuclear magnetic resonance spectrum of sulfonated carboxymethyl tamarind gum prepared by the present invention.
Detailed Description
The technical scheme of the invention is further described below by means of specific embodiments with reference to fig. 1-2.
The various starting materials of the present invention are commercially available, or may be prepared according to methods conventional in the art, unless specifically indicated.
Example 1
The preparation method of the sulfonated carboxymethyl tamarind gum in the embodiment is as follows:
100 g of tamarind gum (nuclear magnetic resonance hydrogen spectrum shown in figure 1) is mixed with 90g of water, 2 g of hydrogen peroxide and 15 g of sodium hydroxide are added, the mixture is stirred for 15 minutes, then heated to 70 ℃ for 1 hour, 10g of sodium chloroacetate and 15 g of 2-acrylamido-2-methylpropanesulfonic acid are added, the temperature is kept at 70 ℃ for 1 hour, the mixture is cooled to room temperature, and the mixture is neutralized to pH7 by adding glacial acetic acid. And (3) vacuum drying the neutralized mixture, and crushing to obtain a sulfonated carboxymethyl tamarind gum sample A, wherein a nuclear magnetic resonance hydrogen spectrum of the sulfonated carboxymethyl tamarind gum sample A is shown in figure 2.
As can be seen from FIG. 2, the spectrum peak of the etherifying agent methylene hydrogen at 4.2ppm, the spectrum peak of the sulfonating agent amide group-linked methylene hydrogen at 2.4ppm, the spectrum peak of the sulfonating agent amide group-linked methyl hydrogen at 1.1ppm, and the degree of substitution by sulfonation of 0.15 and the degree of substitution by carboxymethyl of 0.22 were obtained by integrating the peaks.
Example 2
The preparation method of the sulfonated carboxymethyl tamarind gum in the embodiment is as follows:
100 g of tamarind gum is mixed with 110g of water, 2 g of hydrogen peroxide and 15 g of sodium hydroxide are added, the mixture is stirred for 15 minutes, then heated to 65 ℃ for 1 hour, 15 g of sodium chloroacetate and 20 g of 2-acrylamido-2-methylpropanesulfonic acid are added, the temperature is kept for 1 hour at 65 ℃, the mixture is cooled to room temperature, and the mixture is neutralized to pH7 by adding glacial acetic acid. And (3) drying the neutralized mixture in vacuum, and crushing to obtain a sulfonated carboxymethyl tamarind gum sample B.
The sulfonated carboxymethyl tamarind gum prepared in this example was calculated by the method of example 1 to have a degree of sulfonation substitution of 0.15 and a degree of carboxymethyl substitution of 0.20.
Application example
The digital printing cotton fabric pretreatment agent is prepared by using the sulfonated carboxymethyl tamarind gum A (sample A), the sulfonated carboxymethyl tamarind gum B (sample B) and the commercial DGT-6 as raw materials, and the specific formulas are shown in the table 1.
TABLE 1
| Component (A) | Mass percent (%) |
| Sodium bicarbonate | 1.5 |
| Ethylene glycol | 5 |
| Sample A/sample B/DGT-6 | 2 |
| Water and its preparation method | 91.5 |
In comparison with the commercial product DTG-6, the viscosity was measured using a Brookfield viscometer at 30rpm and 25℃and the viscosity test values are shown in Table 2.
TABLE 2
| Pretreatment agent | Viscosity (cp) |
| Sample A preparation pretreatment agent | 580 |
| Sample B preparation pretreatment agent | 650 |
| DGT-6 preparation pretreatment agent | 620 |
Wherein, the pretreatment mode is as follows: the cotton fabric is soaked with the pretreatment agent, then the excess pretreatment agent is removed by the even padder with double-sided pressure, and then the cotton fabric is dried, printed by ink-jet printing, fixed (steaming for 8min at 108 ℃), washed and dried.
Example 3
The preparation method of the sulfonated carboxymethyl tamarind gum in the embodiment is as follows:
this example differs from example 1 in that the sulphonating reagent 2-acrylamido-2-methylpropanesulfonic acid is replaced by sodium vinylsulfonate, the remainder being identical to example 1.
Example 4
The difference between this example and example 1 is that the depolymerizing agent hydrogen peroxide was replaced with sodium persulfate, and the other is the same as that of example 1.
Example 5
This example differs from example 1 in that the etherifying agent sodium chloroacetate is replaced by chloroacetic acid, all other things being equal to example 1.
Comparative example 1
This comparative example differs from example 1 in that it was not sulphonated by sulphonating reagents, and the specific preparation method is as follows:
100 g of tamarind gum is mixed with 90g of water, 2 g of hydrogen peroxide and 8 g of sodium hydroxide are added, the mixture is stirred for 15 minutes, then heated to 70 ℃ for 1 hour, 10g of sodium chloroacetate is added, the temperature is kept at 70 ℃ for 1 hour, the mixture is cooled to room temperature, and the mixture is neutralized to pH7 by adding glacial acetic acid. And (3) drying the neutralized mixture in vacuum, and crushing to obtain a carboxymethyl tamarind gum sample.
Comparative example 2
This comparative example differs from example 1 in that the amount of sulfonation agent used is too small, specifically 5 g, and the amount of sulfonation agent reduced is increased to other components on average, all other being the same as in example 1.
Comparative example 3
This comparative example differs from example 1 in that the amount of sulfonation agent used was too much, specifically 25 g, and the amount of sulfonation agent added was subtracted from the other components on average, all other things being equal to example 1.
Comparative example 4
This comparative example differs from example 1 in that the amount of depolymerization agent used is too small, specifically 1 gram, and the amount of depolymerization agent reduced is increased on average to other components, all other being identical to example 1.
Comparative example 5
This comparative example differs from example 1 in that the amount of depolymerization agent used is too much, specifically 4 grams, and the amount of depolymerization agent added is subtracted on average from the other components, all other things being equal to example 1.
The sulfonated carboxymethyl tamarind gum prepared in examples 1-5 and the products prepared in comparative examples 1-5 were prepared into digitally printed cotton fabric pretreatment agents according to the formulation of table 1, and performance tests were performed, and the test results are shown in table 3.
The desizing rate can show the elution condition of the pretreatment agent of the digital printing cotton fabric, and indirectly shows the hand feeling of the cotton fabric after printing. The higher the de-pasting rate, the better the effect. The de-pasting rate is the ratio of the quality difference before and after washing the printed cloth to the sizing amount, and the ratio is recorded as a percentage. The color yield is measured by a color measuring instrument, the larger the value is, the deeper the color is, and the higher the color yield is, the judgment standard of the color yield is judged by referring to the universal standard in the industry.
TABLE 3 Table 3
As can be seen from Table 3, the sulfonated carboxymethyl tamarind of the present invention has low adhesiveness, low substitution degree, high desizing rate, high printing definition and high color yield when used for the pretreatment agent of digital printing cotton fabrics. Specifically, the sulfonated carboxymethyl tamarind gum prepared by the invention has the carboxymethyl substitution degree ranging from 0.1 to 0.3, the sulfogroup substitution degree ranging from 0.1 to 0.3, belongs to products with lower substitution degree, has lower consumption of etherifying agent and sulfonating agent, and simultaneously reduces the reaction requirement; the viscosity of the prepared pretreatment agent is 370-610cp, the de-pasting rate is 99.0-99.3%, the printing definition is high, and the color yield is high.
Comparative example 1 was not sulfonated with the sulfonating agent, and resulted in poor de-pasting rate, and general print definition and color yield.
The sulfonation agent of comparative example 2 was used in too small an amount, which resulted in poor de-pasting rate, and the print definition and the color yield were both general.
The sulfonation agent of comparative example 3 is too much in amount, which causes the viscosity to become low, changes the phase, increases the amount used, and increases the cost of the product.
The depolymerizing agent of comparative example 4 was used in too small an amount, which resulted in a high viscosity and poor de-pasting rate, and the print definition and the color yield were both general.
Comparative example 5 has a problem that the viscosity becomes low due to too much depolymerizing agent, and the amount of the depolymerizing agent used is increased by phase inversion, thereby increasing the cost of the product.
The detailed process equipment and process flow of the present invention are described by the above embodiments, but the present invention is not limited to, i.e., it does not mean that the present invention must be practiced depending on the detailed process equipment and process flow. It should be apparent to those skilled in the art that any modification of the present invention, equivalent substitution of raw materials for the product of the present invention, addition of auxiliary components, selection of specific modes, etc., falls within the scope of the present invention and the scope of disclosure.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (7)
1. A digital printing cotton fabric pretreatment agent with the viscosity of 370-610cp and the desizing rate of 99.0-99.3%, which is characterized in that the pretreatment agent comprises sulfonated carboxymethyl tamarind gum, sodium bicarbonate, ethylene glycol and water;
the sulfonated carboxymethyl tamarind gum comprises the following raw materials in parts by weight:
the etherifying agent is sodium chloroacetate;
the sulfonating agent is 2-acrylamido-2-methylpropanesulfonic acid and/or sodium vinylsulfonate.
2. The pretreatment agent according to claim 1, wherein the depolymerizing agent is hydrogen peroxide and/or sodium persulfate.
3. The pretreatment of claim 1, wherein the catalyst is sodium hydroxide and/or potassium hydroxide.
4. The pretreatment agent according to claim 1, wherein the preparation method of the sulfonated carboxymethyl tamarind gum comprises the following steps:
mixing tamarind gum with water according to a proportion, adding a sulfonating reagent, a depolymerizing agent, an etherifying agent and a catalyst for reaction, cooling after the reaction is finished, adding acid for neutralization, and vacuum drying to obtain the sulfonated carboxymethyl tamarind gum.
5. The pretreatment of claim 4, wherein the reaction time is 1 to 3 hours and the reaction temperature is 50 to 80 ℃.
6. The pretreatment of claim 4, wherein the reduced temperature is 35-45 ℃.
7. The pretreatment of claim 4, wherein the neutralization with acid is acetic acid.
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