CN105399856A - Preparation method of dichloro sym-triazine type active group modified sodium alginate - Google Patents
Preparation method of dichloro sym-triazine type active group modified sodium alginate Download PDFInfo
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Abstract
The invention discloses a preparation method of dichloro sym-triazine type active group modified sodium alginate. The method comprises steps as follows: cyanuric chloride and arylamine sulfonate react at the temperature of 0-5 DEG C for 3-5 h, the pH is controlled within 6-7, and dichloro sym-triazine arylamine sulfonate is obtained; the dichloro sym-triazine arylamine sulfonate is firstly mixed with a sodium carbonate aqueous solution, then the mixture is added to a sodium alginate aqueous solution for modification, the pH of a reaction solution is adjusted to be 10-11, the temperature is 30-50 DEG C, stirring treatment is performed for 30-90 min, and a dichloro sym-triazine type active group modified sodium alginate aqueous solution is obtained; the dichloro sym-triazine type active group modified sodium alginate is obtained through post-treatment. A sodium alginate thickener is subjected to chemical modification by use of dichloro sym-triazine type active groups, hydroxyl radicals at C2 and C3 sites are closed, the chemical bonding reaction with reactive dye active groups is shielded, and the surface color yield of printed fabric is increased.
Description
Technical field
The present invention relates to dyeing and printing auxiliary technical field, be specifically related to a kind of preparation method of dichloro s-triazine type active group modified sodium alginate.
Background technology
Printing gum is the important component part of mill base, and affect the surperficial coloured light of PRINTED FABRIC, color evenness, pattern profile sharpness and feel etc., be thus the focus of printer author's common concern all the time.In order to promote that dye molecule is to the upper dye of fabric, in thickener molecular structure, the group having strong avidity or reaction with dyestuff can not be contained.
Sodium alginate is the first-selected thickener that reactive dyestuffs print Mierocrystalline cellulose and protein-based textiles, and this is relevant with the molecular structure of its uniqueness.It is connected by Isosorbide-5-Nitrae-glycosidic link with α-L-guluronic acid (G unit) by Isosorbide-5-Nitrae-poly-beta-D-mannuronic acid (M unit), and the random block linear polymer be made up of with certain proportion different GG, GM or MM fragment.Sodium alginate linear macromolecule interchain forms transient state reticulated structure by hydrogen bond and van der Waals interaction, and " pinning " backbone units C2, C3 position-OH and C6 position-COO
-with the large quantity of moisture of hydrogen bond obvolvent, there is the ability of good rheological and obvolvent moisture.And the C6 position of M unit and G unit is all-COO
-, with on reactive dyestuffs-SO
3 -repelling each other and being beneficial to dyestuff transfers on fiber when evaporating from thickener thin layer, completes dye process.But, C2, C3 position-OH of M unit and G unit also has certain reactive behavior, with on fiber-OH competes, can react with dye activity base generation chemical bonding when stamp high temperature evaporates, hinder dye molecule and interfibrous combination, cause cloth cover dye yield not high enough, color and luster withers secretly.
For this reason, the object of modified sodium alginate mostly is the chemical reactivity in shielding molecule in hydroxyl and reactive dyestuff molecule between active group.At present, many characteristic group'ss reaction (as etherificate, esterification etc.) that can participate in based on-OH of modified chemical scheme designed by most researchers, in the processing of less consideration stamp, in sodium alginate molecule-full-scale condition that reacts between OH and dye activity base.And in order to improve modified-reaction efficiency, often excessively strengthen modified condition and adopt high reactivity auxiliary agent, although improve hydroxyl substitution value, the side reaction of accompanying with it often causes the deterioration of the macromolecular degraded of sodium alginate and rheological property, causes the fundamental property losing printing gum.Such as: Chamberlain etc. are based on the acetylization reaction of acetic anhydride and sodium alginate hydroxyl, and substitution value up to 97.3%, but along with serious DeR in this process, causes system viscosity sharply to decline.The urea such as Coleman/phosphoric acid carries out phosphorylation to sodium alginate, and the strong acid character of phosphoric acid causes sodium alginate molecular rupture, and molecular weight is reduced to 38000Da from 64000Da.
Retain on the basis of printing gum fundamental property at sodium alginate, high effective and modified for what realize C2, C3 position-OH in its molecule, reduce itself and the chemical reactivity of dye activity base, the group close with dye activity base activity can be selected, carry out appropriate modification.S-triazine type active group is introduced modifier molecules by the present invention dexterously, proposes sodium alginate-modified novel method.Cyanuro is the active group that reactive dyestuffs are commonly used the most, and the Cl atom that heterocycle is connected with C atom has higher reactive behavior, be easy to by nucleophilic reagent give electronics-NH
2,-OH and-OR etc. replaced, and reaction is easy to control.The reaction of s-triazine and arylamine class is of paramount importance reaction in the synthesis of halo s-triazine reactive dyestuffs, and feature is that reaction can progressively be carried out in aqueous smoothly, and productive rate is also very high.Owing to applying water medium, for synthesis be separated all very favourable, turn avoid the organic solvent of expensive contaminate environment again.S-triazine active group can with the hydroxyl generation nucleophilic substitution reaction on Mierocrystalline cellulose, so on sodium alginate M unit and G unit C2, C3 hydroxyl position, introduce cyanuric chloride active group and sulfonic group anionic group, the reaction of thickener and reactive dyestuffs can be reduced to greatest extent, realize the object improving PRINTED FABRIC surface dye yield in theory.At present, also there is not been reported to carry out the research of this chemical modification to sodium alginate.
Summary of the invention
The invention provides a kind of preparation method of dichloro s-triazine type active group modified sodium alginate, dichloro s-triazine type active group is adopted to carry out chemical modification to sodium alginate thickener, close C2, C3 position hydroxyl, chemical bonding between shielding and reactive dyestuffs active group reacts, and improves the surperficial dye yield printing fabric.
A preparation method for dichloro s-triazine type active group modified sodium alginate, comprises the following steps:
(1) cyanuric chloride and arylamine sulfonic acid are reacted 3 ~ 5 hours temperature 0 ~ 5 DEG C, pH controls 6 ~ 7, obtains dichloro s-triazine arylamine sulfonic acid, and dichloro s-triazine arylamine sulfonic acid is as properties-correcting agent;
(2) first by dichloro s-triazine arylamine sulfonic acid and aqueous sodium carbonate mixing, then join in sodium alginate aqueous solution and carry out modification, reaction solution pH to 10 ~ 11 are regulated in whole reaction process, temperature 30 ~ 50 DEG C, stir process 30 ~ 90 minutes, obtains the dichloro s-triazine type active group modified sodium alginate aqueous solution;
(3) the dichloro s-triazine type active group modified sodium alginate aqueous solution obtains dichloro s-triazine type active group modified sodium alginate through aftertreatment.
In step (1), described cyanuric chloride and the mol ratio 1:0.98 of arylamine sulfonic acid.Described arylamine sulfonic acid is containing sulfonic arylamine, as specifically selected Sulphanilic Acid, m-sulfanilic acid or naphthionic acid.
In step (2), described dichloro s-triazine arylamine sulfonic acid and the mol ratio of sodium alginate repeated structural unit are 0.8 ~ 2.2:1.
The preparation of described sodium alginate aqueous solution comprises: by sodium alginate powder vacuum-drying to constant weight, then adds water and be uniformly mixed 20 ~ 40 minutes at 30 ~ 50 DEG C, is mixed with the sodium alginate aqueous solution that concentration is 0.008 ~ 0.012mol/L.
By sodium alginate powder vacuum-drying to constant weight, vacuum drying condition is 50 ~ 80 DEG C, 6 ~ 9 hours.
The stir speed (S.S.) of described stir process is 600 ~ 800r/min.
In step (3), described aftertreatment comprises: by the repeated multiple times precipitation of dichloro s-triazine type active group modified sodium alginate aqueous solution acetone, and washing, dries to constant weight, be crushed to powder, obtain dichloro s-triazine type active group modified sodium alginate.
The described dichloro s-triazine type active group modified sodium alginate aqueous solution and the volume ratio of acetone are 1:1.5 ~ 2.5.
The temperature of described oven dry is 50 ~ 80 DEG C.
The dichloro s-triazine type active group modified sodium alginate obtained, can be used as printing gum, carries out printing with reactive dye.
Compared with prior art, the present invention has following beneficial effect:
The present invention carries out chemical modification by dichloro s-triazine arylamine sulfonic acid to sodium alginate, and this method is simple and convenient, and reaction conditions is gentle, and controllability is comparatively strong, and favorable reproducibility.This properties-correcting agent has the active group structure identical with dichloro s-triazine type reactive dyestuffs, therefore modified, and the chemical bonding that can effectively block between sodium alginate C2, C3 position hydroxyl and reactive dyestuffs active group reacts.Dichloro s-triazine type active group modified sodium alginate possesses the fundamental property of printing gum, print the surperficial dye yield of fabric and rate of permeation and all have lifting to a certain degree compared with unmodified sodium alginate, all can improve more than 10%, and meticulous design can be printed, print the clear-cut of design, have broad application prospects in stamp is produced.
Embodiment
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.After the content of having read the present invention's instruction, those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment 1
(1) in the there-necked flask that 0.1mol cyanuric chloride is housed, trash ice and acetone is added successively, stirring to pulp 30min.0.098mol Sulphanilic Acid is dissolved in aqueous sodium carbonate, dropwise joins in there-necked flask.Whole reaction process, control pH6 ~ 7, temperature 0 ~ 5 DEG C, reacts 3 ~ 5 hours, uses thin layer chromatography endpoint detection.After reaction terminates, by reaction solution vacuum filtration, get filtrate acid out, then vacuum filtration, get filter cake, vacuum-drying 24h, namely obtain dichloro s-triazine Sulphanilic Acid, be ground into powder stand-by;
(2) sodium alginate (Shandong bright moon marine alga Group Co., Ltd, viscosity-average molecular weight is 550,000 ~ 650,000) powder is put into vacuum drying oven little of constant weight in 60 DEG C of dryings 8;
(3) in 1000mL there-necked flask, configuration concentration is the sodium alginate aqueous solution of 0.01mol/L, puts it in thermostat water bath, is uniformly mixed 30 minutes with electric mixer in 40 DEG C.
(4) by dichloro s-triazine Sulphanilic Acid and sodium carbonate solution mixing, add in sodium alginate aqueous solution and carry out modification, the mol ratio of dichloro s-triazine Sulphanilic Acid properties-correcting agent and sodium alginate repeated structural unit is 1:1, regulate agitator speed 700r/min, reaction solution pH10 ~ 11 are regulated in whole reaction process, stir process 60 minutes at 40 DEG C, obtains the dichloro s-triazine Sulphanilic Acid modified sodium alginate aqueous solution.
(5) by dichloro s-triazine Sulphanilic Acid modified sodium alginate aqueous solution acetone (the volume ratio 1:2 of the modified sodium alginate aqueous solution and acetone) repeated multiple times precipitation, washing, is dried to constant weight, is crushed to powder at 60 DEG C.
(6) at bar magnet 10mm, speed of a motor vehicle 6m/min, magnetic force 3
#, carry out cotton fabric by utilizing reactive dye stamp under the printing condition of 150 order plain nets, print 10 × 10cm
2square pattern and long 100mm, wide 2mm wedge shaped pattern.Mill base prescription: the red P-4B of 1%K type refined lattice element, 5% urea, 1% reservehao S, 1% sodium bicarbonate, 70% former paste (former paste massfraction is 3%).
Under these conditions, sodium alginate (SA) and dichloro s-triazine Sulphanilic Acid modified sodium alginate (MSA) saturating net amount, surperficial dye yield, rate of permeation, Dry Sack irregularity, pattern profile sharpness on cotton fabric by utilizing reactive dye stamp, pattern profile sharpness comprises the flower pattern sharpness ratio of wedge length and wedge length on screen cloth (on the fabric) and fineness (on fabric, the high and ratio of overall height of wedge shape half departs from the high per-cent with the ratio of overall height of wedge shape half on screen cloth).Sodium alginate and the printing performance of dichloro s-triazine Sulphanilic Acid modified sodium alginate on cotton fabric as shown in table 1.
Table 1
As can be seen from Table 1, the saturating net of dichloro s-triazine Sulphanilic Acid modified sodium alginate is good, and surperficial dye yield improves 11.04%, and rate of permeation improves 13.20%, can print the fine chemical wastewater of clear-cut.
Embodiment 2
(1) in the there-necked flask that 0.1mol cyanuric chloride is housed, trash ice and acetone is added successively, stirring to pulp 30min.0.098mol m-sulfanilic acid is dissolved in aqueous sodium carbonate, dropwise joins in there-necked flask.Whole reaction process, control pH6 ~ 7, temperature 0 ~ 5 DEG C, reacts 3 ~ 5 hours, uses thin layer chromatography endpoint detection.After reaction terminates, by reaction solution vacuum filtration, get filtrate acid out, then vacuum filtration, get filter cake, vacuum-drying 24h, namely obtain dichloro s-triazine m-sulfanilic acid, be ground into powder stand-by;
(2) sodium alginate (Shandong bright moon marine alga Group Co., Ltd, viscosity-average molecular weight is 550,000 ~ 650,000) powder is put into vacuum drying oven little of constant weight in 60 DEG C of dryings 8;
(3) in 1000mL there-necked flask, configuration concentration is the sodium alginate aqueous solution of 0.01mol/L, puts it in thermostat water bath, is uniformly mixed 30 minutes with electric mixer in 40 DEG C.
(4) by dichloro s-triazine m-sulfanilic acid properties-correcting agent and sodium carbonate solution mixing, add in sodium alginate aqueous solution and carry out modification, the mol ratio of dichloro s-triazine m-sulfanilic acid properties-correcting agent and sodium alginate repeated structural unit is 1:1, regulate agitator speed 700r/min, reaction solution pH10 ~ 11 are regulated in whole reaction process, stir process 60 minutes at 40 DEG C, obtains the dichloro s-triazine m-sulfanilic acid modified sodium alginate aqueous solution.
(5) by dichloro s-triazine m-sulfanilic acid modified sodium alginate aqueous solution acetone (the volume ratio 1:2 of the modified sodium alginate aqueous solution and acetone) repeated multiple times precipitation, washing, is dried to constant weight, is crushed to powder at 60 DEG C.
(6) at bar magnet 10mm, speed of a motor vehicle 6m/min, magnetic force 3
#, carry out cotton fabric by utilizing reactive dye stamp under the printing condition of 150 order plain nets, print 10 × 10cm
2square pattern and long 100mm, wide 2mm wedge shaped pattern.Mill base prescription: the red P-4B of 1%K type refined lattice element, 5% urea, 1% reservehao S, 1% sodium bicarbonate, 70% former paste (former paste massfraction is 3%).
Under these conditions, sodium alginate (SA) and dichloro s-triazine Sulphanilic Acid modified sodium alginate (MSA) saturating net amount, surperficial dye yield, rate of permeation, Dry Sack irregularity, pattern profile sharpness on cotton fabric by utilizing reactive dye stamp, pattern profile sharpness comprises the flower pattern sharpness ratio of wedge length and wedge length on screen cloth (on the fabric) and fineness (on fabric, the high and ratio of overall height of wedge shape half departs from the high per-cent with the ratio of overall height of wedge shape half on screen cloth).Sodium alginate and the printing performance of dichloro s-triazine m-sulfanilic acid modified sodium alginate on cotton fabric as shown in table 2.
Table 2
As can be seen from Table 2, the saturating net of dichloro s-triazine m-sulfanilic acid modified sodium alginate is good, and surperficial dye yield improves 11.78%, and rate of permeation improves 12.94%, can print the fine chemical wastewater of clear-cut.
Embodiment 3
(1) in the there-necked flask that 0.1mol cyanuric chloride is housed, trash ice and acetone is added successively, stirring to pulp 30min.0.098mol Sulphanilic Acid is dissolved in aqueous sodium carbonate, dropwise joins in there-necked flask.Whole reaction process, control pH6 ~ 7, temperature 0 ~ 5 DEG C, reacts 3 ~ 5 hours, uses thin layer chromatography endpoint detection.After reaction terminates, by reaction solution vacuum filtration, get filtrate acid out, then vacuum filtration, get filter cake, vacuum-drying 24h, namely obtain dichloro s-triazine Sulphanilic Acid, be ground into powder stand-by;
(2) sodium alginate (Shandong bright moon marine alga Group Co., Ltd, viscosity-average molecular weight is 550,000 ~ 650,000) powder is put into vacuum drying oven little of constant weight in 60 DEG C of dryings 8;
(3) in 1000mL there-necked flask, configuration concentration is the sodium alginate aqueous solution of 0.01mol/L, puts it in thermostat water bath, is uniformly mixed 30 minutes with electric mixer in 90 DEG C.
(4) by dichloro s-triazine Sulphanilic Acid properties-correcting agent and sodium carbonate solution mixing, add in sodium alginate aqueous solution and carry out modification, the mol ratio of dichloro s-triazine Sulphanilic Acid properties-correcting agent and sodium alginate repeated structural unit is 2:1, regulate agitator speed 700r/min, reaction solution pH10 ~ 11 are regulated in whole reaction process, stir process 60 minutes at 90 DEG C, obtains the dichloro s-triazine Sulphanilic Acid modified sodium alginate aqueous solution.
(5) by dichloro s-triazine Sulphanilic Acid modified sodium alginate aqueous solution acetone (the volume ratio 1:2 of the modified sodium alginate aqueous solution and acetone) repeated multiple times precipitation, washing, is dried to constant weight, is crushed to powder at 60 DEG C.
(6) at bar magnet 10mm, speed of a motor vehicle 6m/min, magnetic force 3
#, carry out cotton fabric by utilizing reactive dye stamp under the printing condition of 150 order plain nets, print 10 × 10cm
2square pattern and long 100mm, wide 2mm wedge shaped pattern.Mill base prescription: the black B133% of 1%KN type refined lattice element, 5% urea, 1% reservehao S, 1% sodium bicarbonate, 70% former paste (former paste massfraction is 3%).
Under these conditions, sodium alginate (SA) and dichloro s-triazine Sulphanilic Acid modified sodium alginate (MSA) saturating net amount, surperficial dye yield, rate of permeation, Dry Sack irregularity, pattern profile sharpness on cotton fabric by utilizing reactive dye stamp, pattern profile sharpness comprises the flower pattern sharpness ratio of wedge length and wedge length on screen cloth (on the fabric) and fineness (on fabric, the high and ratio of overall height of wedge shape half departs from the high per-cent with the ratio of overall height of wedge shape half on screen cloth).Sodium alginate and the printing performance of dichloro s-triazine Sulphanilic Acid modified sodium alginate on cotton fabric as shown in table 3.
Table 3
As can be seen from Table 3, the saturating net of dichloro s-triazine arylamine sulfonic acid modified sodium alginate is good, and surperficial dye yield improves 15.08%, and rate of permeation improves 12.86%, can print the fine chemical wastewater of clear-cut.
Embodiment 4
(1) in the there-necked flask that 0.1mol cyanuric chloride is housed, trash ice and acetone is added successively, stirring to pulp 30min.0.098mol Sulphanilic Acid is dissolved in aqueous sodium carbonate, dropwise joins in there-necked flask.Whole reaction process, control pH6 ~ 7, temperature 0 ~ 5 DEG C, reacts 3 ~ 5 hours, uses thin layer chromatography endpoint detection.After reaction terminates, by reaction solution vacuum filtration, get filtrate acid out, then vacuum filtration, get filter cake, vacuum-drying 24h, namely obtain dichloro s-triazine Sulphanilic Acid, be ground into powder stand-by;
(2) sodium alginate (Shandong bright moon marine alga Group Co., Ltd, viscosity-average molecular weight is 550,000 ~ 650,000) powder is put into vacuum drying oven little of constant weight in 60 DEG C of dryings 8;
(3) in 1000mL there-necked flask, configuration concentration is the sodium alginate aqueous solution of 0.01mol/L, puts it in thermostat water bath, stirs 30 minutes in 40 DEG C with electric mixer.
(4) by dichloro s-triazine Sulphanilic Acid properties-correcting agent and sodium carbonate solution mixing, add in sodium alginate aqueous solution and carry out modification, the mol ratio of dichloro s-triazine Sulphanilic Acid properties-correcting agent and sodium alginate repeated structural unit is 1.5:1, regulate agitator speed 700r/min, reaction solution pH10 ~ 11 are regulated in whole reaction process, stir process 60 minutes at 40 DEG C, obtains the dichloro s-triazine Sulphanilic Acid modified sodium alginate aqueous solution.
(5) by dichloro s-triazine Sulphanilic Acid modified sodium alginate aqueous solution acetone (the volume ratio 1:2 of the modified sodium alginate aqueous solution and acetone) repeated multiple times precipitation, washing, is dried to constant weight, is crushed to powder at 60 DEG C.
(6) at bar magnet 10mm, speed of a motor vehicle 6m/min, magnetic force 3
#, carry out viscose fabric printing with reactive dye under the printing condition of 150 order plain nets, print 10 × 10cm
2square pattern and long 100mm, wide 2mm wedge shaped pattern.Mill base prescription: the red P-4B of 1%K type refined lattice element, 5% urea, 1% reservehao S, 1% sodium bicarbonate, 70% former paste (former paste massfraction is 3%).
Under these conditions, sodium alginate (SA) and dichloro s-triazine Sulphanilic Acid modified sodium alginate (MSA) saturating net amount, surperficial dye yield, rate of permeation, Dry Sack irregularity, pattern profile sharpness on viscose fabric printing with reactive dye, pattern profile sharpness comprises the flower pattern sharpness ratio of wedge length and wedge length on screen cloth (on the fabric) and fineness (on fabric, the high and ratio of overall height of wedge shape half departs from the high per-cent with the ratio of overall height of wedge shape half on screen cloth).Sodium alginate and the printing performance of dichloro s-triazine Sulphanilic Acid modified sodium alginate on viscose fabric as shown in table 4.
Table 4
As can be seen from Table 4, the saturating net of dichloro s-triazine Sulphanilic Acid modified sodium alginate is good, and surperficial dye yield improves 17.93%, and rate of permeation improves 17.19%, can print the fine chemical wastewater of clear-cut.
Claims (10)
1. a preparation method for dichloro s-triazine type active group modified sodium alginate, is characterized in that, comprise the following steps:
(1) cyanuric chloride and arylamine sulfonic acid are reacted 3 ~ 5 hours temperature 0 ~ 5 DEG C, pH controls 6 ~ 7, obtains dichloro s-triazine arylamine sulfonic acid;
(2) first by dichloro s-triazine arylamine sulfonic acid and aqueous sodium carbonate mixing, then join in sodium alginate aqueous solution and carry out modification, reaction solution pH to 10 ~ 11 are regulated in whole reaction process, temperature 30 ~ 50 DEG C, stir process 30 ~ 90 minutes, obtains the dichloro s-triazine type active group modified sodium alginate aqueous solution;
(3) the dichloro s-triazine type active group modified sodium alginate aqueous solution obtains dichloro s-triazine type active group modified sodium alginate through aftertreatment.
2. the preparation method of dichloro s-triazine type active group modified sodium alginate according to claim 1, is characterized in that, in step (1), and described cyanuric chloride and the mol ratio 1:0.98 of arylamine sulfonic acid.
3. the preparation method of dichloro s-triazine type active group modified sodium alginate according to claim 1, is characterized in that, in step (1), described arylamine sulfonic acid is for containing sulfonic arylamine.
4. the preparation method of dichloro s-triazine type active group modified sodium alginate according to claim 1, it is characterized in that, in step (2), described dichloro s-triazine arylamine sulfonic acid and the mol ratio of sodium alginate repeated structural unit are 0.8 ~ 2.2:1.
5. the preparation method of dichloro s-triazine type active group modified sodium alginate according to claim 1, it is characterized in that, in step (2), the preparation of described sodium alginate aqueous solution comprises: by sodium alginate powder vacuum-drying to constant weight, then add water and be uniformly mixed 20 ~ 40 minutes at 30 ~ 50 DEG C, being mixed with the sodium alginate aqueous solution that concentration is 0.008 ~ 0.012mol/L.
6. the preparation method of dichloro s-triazine type active group modified sodium alginate according to claim 5, it is characterized in that, described vacuum drying condition is 50 ~ 80 DEG C, 6 ~ 9 hours.
7. the preparation method of dichloro s-triazine type active group modified sodium alginate according to claim 1, is characterized in that, in step (2), the stir speed (S.S.) of described stir process is 600 ~ 800r/min.
8. the preparation method of dichloro s-triazine type active group modified sodium alginate according to claim 1, it is characterized in that, in step (3), described aftertreatment comprises: by the repeated multiple times precipitation of dichloro s-triazine type active group modified sodium alginate aqueous solution acetone, washing, dry to constant weight, be crushed to powder, obtain dichloro s-triazine type active group modified sodium alginate.
9. the preparation method of dichloro s-triazine type active group modified sodium alginate according to claim 8, is characterized in that, the described dichloro s-triazine type active group modified sodium alginate aqueous solution and the volume ratio of acetone are 1:1.5 ~ 2.5.
10. the preparation method of dichloro s-triazine type active group modified sodium alginate according to claim 8, is characterized in that, the temperature of described oven dry is 50 ~ 80 DEG C.
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