CN102731671B - Modified xanthan gum surface sizing agent, and preparation method thereof - Google Patents
Modified xanthan gum surface sizing agent, and preparation method thereof Download PDFInfo
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- CN102731671B CN102731671B CN201210223753.XA CN201210223753A CN102731671B CN 102731671 B CN102731671 B CN 102731671B CN 201210223753 A CN201210223753 A CN 201210223753A CN 102731671 B CN102731671 B CN 102731671B
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Abstract
The invention provides a modified xanthan gum surface sizing agent, and a preparation method thereof. The preparation method comprises the steps that: (1) xanthan gum is mixed with a solvent; the temperature is increased to 50-70 DEG C; and the mixture is activated for 30-60min; (2) an oxidizing agent is added to the mixture, and the mixture is mixed by stirring for 10-20min; and (3) the pH value of the system is regulated to 9-10 by using an alkali; a reaction is carried out with maintained temperature for 2-5h; the temperature of the system is reduced to 30-40 DEG C; the pH value of the system is regulated to 6-8 by using an neutralizing agent; and the modified xanthan gum surface sizing agent is collected from reaction products. With the method provided by the invention, viscosity stability is greatly improved. When the modified xanthan gum surface sizing agent is used in surface sizing, the strength of the surface is improved, and various physical indexes of papers are greatly improved. Paper plane evenness and colored paper vividness are improved. Ash content is increased, but paper plane strength and texture are not affected. The modified xanthan gum surface sizing agent is safe and environment-friendly, and can satisfy production requirements. The modified xanthan gum surface sizing agent and the method can provide good economic and environmental benefits.
Description
Technical field
The present invention relates to a kind of Surface Size and preparation method thereof.
Background technology
The smoothness and the intensity that in order to give paper surface, have had, people often solve by the way of Surface Size treated starch.Conventionally adopt Sumstar 190, but this starch and cellulose affinity are poor, when broken copies back, major part enters white-water system, and system BOD and COD value are increased, very harmful to environmental protection, affect system Zeta potential simultaneously, and then affect paper machine and manufacture paper with pulp, and surface strength is bad.Because cationic starch and anion fiber and filler have very strong adsorption, can be well by fiber retention, and have minimizing environmental pollution.Therefore fall over each other the cationic starch that development is applicable to paper for surface sizing both at home and abroad, but common cationic starch is due to the reason of the aspects such as its year and stability, can not be directly used in top sizing, must be by continuing modification, to control its viscosity and to guarantee that it sticks with paste the stability of liquid, reduce the viscosity of cationic starch, common way is that starch is oxidized, and generally use at present clorox effect oxygenant, but the speed of response of clorox is slow, in oxidising process, the stripping of great amount of soluble glucide will be caused, and produce chloride carcinogenic substance, production and environment are all caused to very large impact.Chinese patent literature CN1275991A discloses a kind of " treated starch ", its production line is the reaction of oxidation-esterization, and esterification is anionic reactive, and it can improve the characteristics such as starch paste fluid viscosity stability, but poor to fiber affinity, paper plant is formed to contaminated wastewater.
Summary of the invention
One of object of the present invention is exactly in order to solve the problem of above existence, and a kind of modification xanthan gum Surface Size is provided;
Another object of the present invention is to provide a kind of preparation method of modification xanthan gum Surface Size.
The preparation method of modification xanthan gum Surface Size of the present invention, comprises the steps:
(1), by xanthan gum and solvent, be warming up to 50-70 ℃ of activation 30-60 minute;
(2) add oxygenant, be uniformly mixed 10-20 minute;
(3) by the pH value of alkali regulation system to 9-10, after insulation reaction 2-5 hour, system temperature is down to 30-40 ℃, by the pH value of neutralizing agent regulation system, to 6-8, then from reaction product, collects modification xanthan gum Surface Size;
Described solvent is selected from a kind of in methyl alcohol, ethanol, Virahol, sherwood oil or acetone;
Described oxygenant is a kind of in hydrogen peroxide, ammonium persulphate, potassium permanganate or the clorox of weight concentration 25～30%;
Described alkali is a kind of in sodium hydroxide, potassium hydroxide, triethylamine, diethylamine or ammonium hydroxide;
Described neutralizing agent is a kind of in hydrochloric acid, sulfuric acid or Glacial acetic acid;
The weight part of each described material is:
Xanthan gum 50-100 part
Solvent 50-200 part
Oxygenant 0.5-2.0 part
The present invention be take xanthan gum as raw material carries out modification, obtains described modification xanthan gum Surface Size, and xanthan gum has another name called xanthan gum, xanthocyte gum, Xanthan Gum etc., is the exocellular polysaccharide class biological polymer that starch produces through yellow born of the same parents' bacillus fermentation.In its molecular structure, main chain is that the side chain that the glucosyl group that connected by β-(Isosorbide-5-Nitrae) glycosidic bond forms has three sugar units, has D-MANNOSE and D-Glucose aldehydic acid to be alternately formed by connecting, and molecule ratio is 2:1; Trisaccharide side chain by C-6 position with the D-MANNOSE of ethanoyl with α-(1; 3) key is connected with main chain; on the D-MANNOSE residue of side chain terminal with the form of acetal with pyruvic acid, its higher structure is by hydrogen bond, to maintain between side chain and main chain, forms spiral and multi-spiral.Macromole side chain in its structure contains more hydrogen bond, and Intermolecular Forces is stronger, forms space reticulated structure, in rarer aqueous solution, present typical chrysanthemum shape state of aggregation, this chrysanthemum flower-like structure is the curling arrangement of radioactivity by many molecule Rao Yige center and forms, and ubiquity.
The special property of the critical nature of xanthan gum based on it, in the aqueous solution because intermolecular repulsion forms stable colloid, can be used as the stablizer of rheology control agent and emulsion form and suspension agent.Its excellent properties is embodied in: (1) xanthan gum is tasteless, odorless, safety in utilization are strong; (2) there is high viscosity during lower concentration, compare with its polysaccharide soln, even lower concentration also can produce very high viscosity, thereby can be used as good thickening material and stablizer; (3) good thermostability is repeatedly heated, freezing in certain temperature range, and viscosity is substantially constant; (4) ph stability, pH value does not affect viscosity; (5) there is consistency widely, good compatibleness, can with the synthetic or natural thickening material compatibility of great majority, after mixing, viscosity significantly increases.
Modification xanthan gum Surface Size prepared by the present invention, can with other sizing agent, as compatibilities such as AKD sizing agent, DS-SS640 Surface Size, for the top sizing of paper.
Modification xanthan gum Surface Size prepared by the present invention, can greatly improve viscosity stability, for top sizing, not only can make surface strength improve, also make every physical index of paper all greatly take on a new look simultaneously, the particularly raising of spread, has improved the uniformity coefficient of paper and the vividness of colored paper, and ash content improves but do not affect surface strength and the feel of paper, the xanthan gum of modification simultaneously consumption is few, safety and environmental protection, can meet the demand of production, has good economic benefit and environmental benefit.
Embodiment
Embodiment 1
In normal temperature downhill reaction still, add ethanol 100 weight parts, open and stir, under agitation add xanthan gum 100 weight parts, after being uniformly dispersed, add and be warming up to 50 ℃, at this temperature, activate after 60 minutes, hydrogen peroxide 2.0 weight parts that add oxygenant weight concentration 30%, after stirring and mixing for 10 minutes, adding weight concentration is the pH value to 9.5 that 30% sodium hydroxide solution is adjusted solution, continue insulation after 5 hours, be cooled to 30 ℃, add hydrochloric acid to the pH of solution most 7.0, suction filtration, oven dry, pulverizing, cross after 100 order mesh screens packed for standby use.
Embodiment 2
In normal temperature downhill reaction still, add methyl alcohol 100 weight parts, open and stir, under agitation add xanthan gum 50 weight parts, after being uniformly dispersed, add and be warming up to 60 ℃, at this temperature, activate after 50 minutes, add oxygenant ammonium persulphate 0.5 weight part, after stirring and mixing for 10 minutes, adding weight concentration is the pH value to 9.0 that 10% sodium hydroxide solution is adjusted solution, continue insulation after 4 hours, be cooled to 35 ℃, with the pH of sulfuric acid regulation solution most 6.0, suction filtration, oven dry, pulverizing, cross after 100 order mesh screens packed for standby use.
Embodiment 3
In normal temperature downhill reaction still, add sherwood oil 150 weight parts, open and stir, under agitation add xanthan gum 100 weight parts, after being uniformly dispersed, add and be warming up to 70 ℃, at this temperature, activate after 40 minutes, add oxidant potassium permanganate 2.0 weight parts, after stirring and mixing for 10 minutes, add the sodium hydroxide solution of weight concentration 20% to adjust the pH value to 10 of solution, continue insulation after 3 hours, be cooled to 30 ℃, adding Glacial acetic acid to make the pH of solution is 8.0, suction filtration, oven dry, pulverizing, cross after 100 order mesh screens packed for standby use.
Embodiment 4
In normal temperature downhill reaction still, add ethanol 200 weight parts, open and stir, under agitation add xanthan gum 85 weight parts, after being uniformly dispersed, add and be warming up to 65 ℃, at this temperature, activate after 45 minutes, add oxygenant clorox 1.3 weight parts, after stirring and mixing for 20 minutes, add the sodium hydroxide solution 1 of weight concentration 15% to adjust the pH value to 9.5 of solution, continue insulation after 3.5 hours, be cooled to 40 ℃, with the pH of hydrochloric acid conditioning solution most 7.5, suction filtration, oven dry, pulverizing, cross after 100 order mesh screens packed for standby use.
Embodiment 5
The application of modification xanthan gum Surface Size on offset printing paper:
Prepare 500 gram of 10% Sumstar 190, be warmed up to 85-90 ℃, gelatinization 30 minutes, cool to 40 ℃, then divide 5 parts of same amount starch fluids, then add respectively embodiment 1-4 formula modification xanthan gum and the patent CN101210401 product of amount of starch 1.5%, be diluted with water to again 8%, stir stand-by after 30 minutes.
Specimen surface intensity is measured with IGT gigging speed determinator;
Sample folding endurance is measured according to GB457-89;
Sample fracture length is measured according to GB455.1-89;
Sample smoothness is used paper smoothness determinator to measure;
Every physical index test result is as follows:
| Project | Contrast sample | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Surface strength/m.s -1 | 2.05 | 3.32 | 3.15 | 3.20 | 2.98 |
| Folding endurance (inferior) | 42 | 55 | 47 | 53 | 54 |
| Fracture length/m | 3200 | 3680 | 3540 | 3400 | 3540 |
| Smoothness/s | 40 | 43 | 45 | 42 | 46 |
Remarks: contrast sample is patent CN200710172849 product.
Claims (7)
1. the preparation method of modification xanthan gum Surface Size, is characterized in that, comprises the steps:
(1), by xanthan gum and solvent, be warming up to 50-70 ℃ of activation 30-60 minute;
(2) add oxygenant, be uniformly mixed 10-20 minute;
(3) by the pH value of alkali regulation system to 9-10, after insulation reaction 2-5 hour, system temperature is down to 30-40 ℃, by the pH value of neutralizing agent regulation system, to 6-8, then from reaction product, collects modification xanthan gum Surface Size.
2. method according to claim 1, is characterized in that, described solvent is selected from a kind of in methyl alcohol, ethanol, Virahol, sherwood oil or acetone.
3. method according to claim 1, is characterized in that, described oxygenant is a kind of in hydrogen peroxide, ammonium persulphate, potassium permanganate or the clorox of weight concentration 25～30%.
4. method according to claim 1, is characterized in that, described alkali is a kind of in sodium hydroxide, potassium hydroxide, triethylamine, diethylamine or ammonium hydroxide.
5. method according to claim 1, is characterized in that, described neutralizing agent is a kind of in hydrochloric acid, sulfuric acid or Glacial acetic acid.
6. according to the method described in claim 1～5 any one, it is characterized in that, the weight part of each described material is:
Xanthan gum 50-100 part
Solvent 50-200 part
Oxygenant 0.5-2.0 part.
7. the modification xanthan gum Surface Size of preparing according to method described in claim 1～6 any one.
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| CN201210223753.XA CN102731671B (en) | 2012-06-29 | 2012-06-29 | Modified xanthan gum surface sizing agent, and preparation method thereof |
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| CN201210223753.XA CN102731671B (en) | 2012-06-29 | 2012-06-29 | Modified xanthan gum surface sizing agent, and preparation method thereof |
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| CN102731671B true CN102731671B (en) | 2014-07-16 |
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| CN102899926B (en) * | 2012-10-30 | 2014-05-28 | 东华大学 | Method of applying alkali modified xanthan gum to textile printing |
| CN108821727A (en) * | 2018-05-29 | 2018-11-16 | 安徽臻烁新材料技术有限公司 | A kind of preparation method of expanded perlite external wall insulation |
| CN108558277A (en) * | 2018-05-29 | 2018-09-21 | 安徽臻烁新材料技术有限公司 | A kind of lightweight expansion perlite external wall heat insulation plate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275991A (en) * | 1997-09-10 | 2000-12-06 | 雷西欧化学有限公司 | Modified starch |
| CN1749480A (en) * | 2004-09-13 | 2006-03-22 | 上海东升新材料有限公司 | Nano emulsion type surface gluing agent |
| CN102363937A (en) * | 2011-06-30 | 2012-02-29 | 上海东升新材料有限公司 | Guar gum surface sizing agent and its preparation method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275991A (en) * | 1997-09-10 | 2000-12-06 | 雷西欧化学有限公司 | Modified starch |
| CN1749480A (en) * | 2004-09-13 | 2006-03-22 | 上海东升新材料有限公司 | Nano emulsion type surface gluing agent |
| CN102363937A (en) * | 2011-06-30 | 2012-02-29 | 上海东升新材料有限公司 | Guar gum surface sizing agent and its preparation method |
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Denomination of invention: Modified xanthan gum surface sizing agent and its preparation method Effective date of registration: 20220715 Granted publication date: 20140716 Pledgee: Bank of Hangzhou Limited by Share Ltd. Shanghai branch Pledgor: SHANGHAI DONGSHENG NEW MATERIALS Co.,Ltd. Registration number: Y2022310000128 |
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Date of cancellation: 20230718 Granted publication date: 20140716 Pledgee: Bank of Hangzhou Limited by Share Ltd. Shanghai branch Pledgor: SHANGHAI DONGSHENG NEW MATERIALS Co.,Ltd. Registration number: Y2022310000128 |