CN103572651B - A kind of modification tara gum and preparation method thereof and application - Google Patents

A kind of modification tara gum and preparation method thereof and application Download PDF

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CN103572651B
CN103572651B CN201310608762.5A CN201310608762A CN103572651B CN 103572651 B CN103572651 B CN 103572651B CN 201310608762 A CN201310608762 A CN 201310608762A CN 103572651 B CN103572651 B CN 103572651B
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tara gum
solution
modified
tara
preparation
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CN103572651A (en
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靳丽强
魏延伟
徐清华
巴金
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Qilu University of Technology
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Abstract

The present invention relates to a kind of modification tara gum and preparation method thereof and application. This modification tara gum mixes tara gum glue, stir with modification liquid 5min~10min and makes, wherein, tara gum gelatin concentration 0.1-1.0wt%, described modification liquid is that modifier boric acid, phenyl boric acid, Boratex or potassium borate are dissolved in deionized water, and being mixed with mass concentration is that 0.1-1.0wt%, pH are 10~14 solution; The mass ratio of described tara gum powder and modifier is 1:1-3. The present invention also provides the preparation method of modification tara gum, and as the application of paper retention and filter aid. Modification tara gum of the present invention can significantly improve the retention performance of filler and fiber fines in paper pulp, improves the water filtering performance of slurry, improves the operability of high-speed paper machine, obviously improves its effect.

Description

Modified tara gum and preparation method and application thereof
(I) technical field
The invention relates to modified tara gum, a preparation method thereof and application of the tara gum as a papermaking retention and drainage aid, belonging to the technical field of papermaking.
(II) background of the invention
With the rapid development of the paper industry and the continuous innovation of the paper making technology, the paper machine is developed towards large-scale and high-speed, and under the condition of using a large amount of secondary fibers, the dependence of paper making on a papermaking wet end auxiliary agent is stronger and stronger. The retention and drainage aid is widely applied to the modern paper making industry, and has obvious economic benefit. The water-saving type water-saving paper machine can reduce the water discharge pollution while improving the retention rate and the water filtering performance of paper materials, and the white water closed circulating system can normally operate, thereby improving the quality of finished paper and reducing the adverse effect on other physical properties of the paper as much as possible.
Under the present situation that non-renewable resources such as coal, oil, and natural gas are increasingly exhausted, it is a necessary trend to fully develop and utilize renewable resources. The paper making industry faces huge resource and environmental pressure, and the preparation of paper making chemicals from biomass and the preparation of new materials by biological and chemical modification by utilizing biological resources are the development direction of the paper industry in the future. The polysaccharide gum prepared from plants has rich raw material sources, relatively simple preparation process, small influence on the environment in the production process, and a plurality of unique performances and effects of the product. With the development of separation and extraction technology, the application field of plant polysaccharide gum is continuously expanded, and the method becomes a research field which is widely concerned. In the paper industry, plant polysaccharide gums are used mainly as functional adjuvants to achieve enhancement and flocculation.
Tara (Tara), also known as caesalpinia spinosa, is a long green shrub or small tree of caesalpinia genus of the hematoxylaceae family. The tara seed is tara bean, and the tara bean mainly comprises a seed shell, a tara glue layer and a seed germ layer. At present, mechanical peeling methods are mostly adopted at home and abroad to process tara beans and produce tara gum. The structure of the tara gum is that D-mannose is connected with beta- (1 → 4) glycosidic bond to form a main chain, and D-galactose is connected with alpha- (1 → 6) glycosidic bond to form a side chain at certain mannosyl positions, thereby forming the glycan with a multi-branch structure. Currently, tara gum is mainly used as a gelling agent or thickener in the food and feed industry. However, natural tara gum has poor retention in paper pulp due to its non-ionic nature, and when used as a retention and drainage aid for papermaking, it affects its application performance.
Disclosure of the invention
Aiming at the defects of the prior art, the invention provides modified tara gum and a preparation method thereof.
The invention also provides application of the novel modified tara gum as a retention and drainage aid for papermaking.
The technical scheme of the invention is as follows:
a modified tara gum for retention and drainage of paper is prepared through mixing the tara gum liquid with modified liquid, stirring for 5-10 min,
the tara gum solution is prepared by dissolving tara gum solution in deionized water to prepare a gum solution with the mass concentration of 0.1-1.0 wt%;
the modifying solution is prepared by dissolving a modifying agent in deionized water, wherein the mass concentration of the modifying agent is 0.1-1.0wt%, and the pH value of the modifying solution is 10-14;
the mass ratio of the tara rubber powder to the modifier is 1: 1-3, wherein the modifier is boric acid, phenylboronic acid, sodium borate or potassium borate.
According to the invention, the preparation method of the modified tara gum comprises the following steps:
(1) preparation of modified liquid
Dissolving a certain amount of modifier in deionized water to prepare a solution with the mass concentration of 0.1-1.0wt%, and adjusting the pH to 10-14; obtaining a modified solution;
the modifying agent is boric acid, phenylboronic acid, sodium borate or potassium borate.
(2) Preparation of tara gum liquid
Weighing a certain amount of tara rubber powder, adding the tara rubber powder into deionized water at the temperature of 70-80 ℃, adjusting the mass concentration to 0.1-1.0wt%, and stirring until the tara rubber powder is completely dissolved;
(3) preparation of modified tara gum
According to the mass ratio of the tara rubber powder to the modifier of 1: 1-3, mixing the tara gum solution and the modifying solution at room temperature, and stirring for 5-10 min to obtain the modified tara gum.
And (3) stirring in the step (2) by adopting an electric stirrer. The electric stirrer is conventional in the art and is commercially available.
Preferably, according to the invention, the pH value is adjusted to 10 to 11.5 in step (1); the preferable pH regulator is NaOH; NaOH solutions having a concentration of from 5 to 15% by weight are generally used.
According to the invention, the concentration of the modifying solution in step (1) is preferably 0.1 to 0.5 wt.%.
According to the invention, the concentration of the tara gum solution in step (2) is preferably 0.1 to 0.3 wt%.
The modified tara gum product obtained by the invention is a transparent solution, compared with unmodified tara gum, the apparent charge density (negative value) is greatly increased, and when the pH value is 9, the apparent charge density is increased to about-1.1 meq/g from about-0.09 meq/g. The improvement is about 11-12 times.
According to the invention, the modified tara gum is used as a retention and drainage aid for papermaking, and is added into a paper stock system before the papermaking process step, wherein the addition amount is 0.05-2wt% of the mass of the absolutely dry paper stock.
In more detail, the modified tara gum is applied as a retention and drainage aid for papermaking, and the method comprises the following steps:
in the paper material with the mass concentration of 0.1-1%, 5-30% of filler, 1.0-3.0% of sizing agent and 0.01-2.0% of high molecular cationic polymer are sequentially added under the condition of the stirring rotation speed of 700-900rpm and mixed for 1-10 min, the stirring speed of the paper material system is increased to 1500-1800rpm, the stirring speed is kept for 30-5 min, then the stirring rotation speed is reduced to 700-900rpm, and then 0.05-2wt% of modified tara is added, and the paper is formed after the action for 30-5 min. The above dosage is the weight percentage of the absolute dry paper material.
The filler, sizing agent and high molecular cationic polymer are all the prior art in the field. For example:
the filler is calcium carbonate or talcum powder, and the sizing agent is rosin size, Alkyl Ketene Dimer (AKD) or Alkenyl Succinic Anhydride (ASA). All are common additives in the field and are commercially available.
The high-molecular cationic polymer is cationic polyacrylamide, cationic starch or cationic starch grafted polyacrylamide, is a common raw material in the field, and is commercially available.
The invention has the following technical characteristics and excellent effects:
the inventor of the invention finds that the tara gum is difficult to be retained by the fiber due to the non-ionic property and is difficult to be used for retention and drainage of papermaking, but because a large amount of active hydroxyl groups exist on the molecular chain of the tara gum, the apparent charge density of the tara gum is improved by further modifying the tara gum, the tara gum can overcome the problem that the tara gum is difficult to be retained by the fiber, and the tara gum is used as an anionic compound in a papermaking multi-component retention and drainage system. The invention unexpectedly discovers that boric acid or borate can perform a complex reaction with tala polysaccharide under a weakly alkaline condition, so that the ionized surface of the tala polysaccharide has negative charges, and the apparent charge density of the tala polysaccharide is greatly improved. Compared with unmodified tara gum, the modified tara gum can obviously improve the retention performance of fillers and fine fibers in paper pulp and obviously improve the application effect.
The paper making industry faces huge resource and environmental pressure, and the biological resource is utilized to carry out biological and chemical modification to prepare a new material, which is the development direction of the paper industry in the future. The invention utilizes natural tara gum to modify and serve as retention and drainage aid for papermaking, has good biocompatibility and biodegradability, and is a green and environment-friendly papermaking auxiliary agent. The surface of the modified tara gum has anionic charges and generates cross-linking, and the tara gum and a high-molecular cationic polymer act together, so that the retention of fine fibers and fillers in the pulp can be improved, the drainage performance of the pulp can be improved, and the tara gum is very helpful for improving the operating performance of a high-speed paper machine.
(IV) detailed description of the preferred embodiments
The present invention is further illustrated by, but not limited to, the following examples.
Example 1: preparation and application of modified tara gum
(1) Preparation of modified liquid
0.2g of borax is weighed and placed in a beaker filled with 100ml of deionized water, the pH value is adjusted to 10, a glass rod is used for stirring until the borax is completely dissolved, and the modifying solution is ready for use.
(2) Preparation of tara gum liquid
0.1g of tara gum powder is weighed, slowly added into a 100ml deionized water beaker heated to 70 ℃, and stirred by an electric stirrer until the tara gum powder is completely dissolved.
(3) Preparation of modified tara gum
Mixing the tara gum solution and the borax modification solution, and stirring at room temperature for 10min to obtain modified tara gum.
The resulting modified tara gum product was a clear solution with an apparent charge density (negative) increased from-0.0932 meq/g to-1.087 meq/g before modification at pH 9. The improvement is 11.5 times.
The application of the modified tara gum as a retention and drainage aid for papermaking:
adding 20% of calcium carbonate and 1% of anionic rosin size into chemical thermomechanical pulp with the mass concentration of 0.3%, uniformly mixing, adding 0.05% of cationic polyacrylamide at the rotating speed of 750rpm, increasing the rotating speed to 1500rpm after 30s of action, reducing the rotating speed to 750rpm after 1min of action, then adding 0.4% of the modified tara gum prepared in the step (3), mixing for 1min, making paper into paper, drying, keeping the retention rate of the paper to 87.9%, and enabling the water filtration speed of the paper to be high, and the paper to be good in evenness. The percentages of the above additives are percentages relative to the weight of the absolutely dry paper stock.
Comparative example:
the application method of the modified tara gum as the papermaking retention and drainage aid is different from the method that the modified tara gum prepared in the example 1 is replaced by the tara gum solution (unmodified) in the step (2), the tara gum solution is added into the paper stock according to the amount of 0.4%, the mixture is mixed for 1min, then the paper stock is made into paper, the retention rate of the dried paper stock is 82.1%, and the water filtration speed of the paper stock is reduced.
Example 2: preparation and application of modified tara gum
(1) Preparation of modified liquid
0.3g of phenylboronic acid is weighed and placed into a beaker filled with 100ml of deionized water, the pH value is adjusted to 10.5, the mixture is stirred by a glass rod until the phenylboronic acid is completely dissolved, and the modified solution is prepared for use.
(2) Preparation of tara gum liquid
0.1g of tara gum powder is weighed, slowly added into a 100ml deionized water beaker heated to 70 ℃, and stirred by an electric stirrer until the tara gum powder is completely dissolved.
(3) Preparation of modified tara gum
And mixing the tara gum solution and the phenylboronic acid modified solution, and uniformly stirring at room temperature to obtain the modified tara gum.
The obtained modified tara gum product is a transparent solution, and the apparent charge density (negative value) is-1.095 meq/g when the pH value is 9. 11.75 times the amount of-0.0932 meq/g before modification.
The application comprises the following steps:
adding 20% of calcium carbonate and 1% of anionic rosin size into chemical thermomechanical pulp with the mass concentration of 0.3%, uniformly mixing, adding 0.05% of cationic polyacrylamide at the rotating speed of 750rpm, increasing the rotating speed to 1500rpm after 30s of action, reducing the rotating speed to 750rpm after 1min of action, then adding 0.4% of the modified tara gum prepared in the step (3), mixing for 1min, making paper into paper, drying, keeping the retention rate of the paper 88.1%, and enabling the water filtration speed of the paper to be high, and the paper formation to be good. The percentages of the above additives are percentages relative to the weight of the absolutely dry paper stock.
Example 3: preparation and application of modified tara gum
(1) Preparation of modified liquid
0.15g of boric acid is weighed, placed in a beaker filled with 100ml of deionized water, the pH value is adjusted to 11, the mixture is stirred by a glass rod until the boric acid is completely dissolved, and the crosslinking solution is ready for use.
(2) Preparation of tara gum liquid
0.1g of tara gum powder is weighed, slowly added into a 100ml deionized water beaker heated to 70 ℃, and stirred by an electric stirrer until the tara gum powder is completely dissolved.
(3) Preparation of modified tara gum
Mixing the tara gum liquid and the sodium borate modified liquid, and stirring at room temperature for 10min to obtain the modified tara gum.
The obtained modified tara gum product is a transparent solution, and the apparent charge density (negative value) is increased from-0.0932 meq/g to-1.098 meq/g before modification when the pH value is 9.
The application comprises the following steps:
adding 20% of calcium carbonate and 1% of anionic rosin size into bleached waste newspaper deinking pulp with the mass concentration of 0.3%, uniformly mixing, adding 0.05% of cationic starch at the rotating speed of 750rpm, increasing the rotating speed to 1500rpm after 30s of action, reducing the rotating speed to 750rpm after 1min of action, then adding 0.4% of the modified tara gum prepared in the step (2), mixing for 1min, making paper into paper, and drying to obtain the paper with the retention rate of 88.5%, wherein the water filtering speed of the paper is high, and the paper formation uniformity is good. The percentages of the above additives are percentages relative to the weight of the absolutely dry paper stock.
Example 4: as described in example 1, except that cationic starch is used as the cationic polymer in the application.
Example 5: as described in example 2, except that the cationic polymer employed in the application is cationic starch.
Example 6: as described in example 3, except that the cationic polymer used in the application process is cationic polyacrylamide.
Example 7: as described in example 1, except that the modifier in step (1) was potassium borate.

Claims (7)

1. A modified tara gum for retention and drainage aid in papermaking is a transparent solution prepared by mixing a tara gum solution and a modifying solution and stirring for 5-10 min, wherein the apparent charge density is increased from-0.09 meq/g to-1.1 meq/g when the pH is 9; wherein,
the tara gum solution is prepared by dissolving tara gum solution in deionized water to prepare a gum solution with the mass concentration of 0.1-1.0 wt%;
the modifying solution is prepared by dissolving a modifying agent in deionized water, wherein the mass concentration of the modifying agent is 0.1-1.0wt%, and the pH value of the modifying solution is 10-14;
the mass ratio of the tara rubber powder to the modifier is 1: 1-3, wherein the modifier is boric acid, phenylboronic acid, sodium borate or potassium borate.
2. The preparation method of the modified tara gum as claimed in claim 1, comprising the steps of:
(1) preparation of modified liquid
Dissolving a certain amount of modifier in deionized water to prepare a solution with the mass concentration of 0.1-1.0wt%, and adjusting the pH to 10-14; obtaining a modified solution;
the modifier is boric acid, phenylboronic acid, sodium borate or potassium borate;
(2) preparation of tara gum liquid
Weighing a certain amount of tara rubber powder, adding the tara rubber powder into deionized water at the temperature of 70-80 ℃, adjusting the mass concentration to 0.1-1.0wt%, and stirring until the tara rubber powder is completely dissolved;
(3) preparation of modified tara gum
According to the mass ratio of the tara rubber powder to the modifier of 1: and (3) mixing the tara gum solution and the modification solution according to the proportion of 1-3, and stirring for 5-10 min to obtain the modified tara gum.
3. The preparation method of the modified tara gum as claimed in claim 2, wherein the pH is adjusted to 10-11.5 in the step (1); the pH regulator is NaOH solution with concentration of 5-15 wt%.
4. The process for preparing modified tara gum according to claim 2, wherein the concentration of the modifying solution in step (1) is 0.1 to 0.5 wt%.
5. The process for preparing modified tara gum according to claim 2, wherein the concentration of the tara gum solution in step (2) is 0.1 to 0.3 wt%.
6. The use of the modified tara gum of claim 1 as a retention and drainage aid in papermaking, wherein the modified tara gum is added to a stock system in an amount of 0.05 to 2wt% relative to the mass of the absolutely dry stock prior to the papermaking process step.
7. The use of the modified tara gum of claim 6 as a retention and drainage aid in papermaking by the following process:
in the paper material with the mass concentration of 0.1-1%, 5-30% of filler, 1.0-3.0% of sizing agent and 0.01-2.0% of high molecular cationic polymer are sequentially added under the condition of the stirring rotation speed of 700-900rpm and mixed for 1-10 min, the stirring speed of the paper material system is increased to 1500-1800rpm, the stirring time is kept for 30-5 min, the stirring rotation speed is reduced to 700-900rpm, and then 0.05-2wt% of modified tara gum is added, and the paper is formed after the action for 30-5 min; the above dosage is the weight percentage of the absolute dry paper material.
CN201310608762.5A 2013-11-25 2013-11-25 A kind of modification tara gum and preparation method thereof and application Expired - Fee Related CN103572651B (en)

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CN103865060B (en) * 2014-03-20 2016-06-29 江南大学 The preparation method of a kind of polymeric retention aid retention aid and filter containing phenylboric acid functional group and application thereof
CN106490338A (en) * 2016-11-07 2017-03-15 四川亭江新材料股份有限公司 Tower draws application and its feed addictive of the powder in feed, feed
CN110791977A (en) * 2019-11-28 2020-02-14 四川大学 Tara gum modified digital printing paste and preparation method thereof

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CN102080342A (en) * 2010-11-25 2011-06-01 山东轻工业学院 Anionic organic particles and preparation and application thereof

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CN1302201A (en) * 1997-07-29 2001-07-04 阿尔康实验室公司 Ophthalmic compositions containing galactomannan polymers and borate
CN101233844A (en) * 2008-01-14 2008-08-06 周加权 Watersoluble cleaning sterilization gel
CN102080342A (en) * 2010-11-25 2011-06-01 山东轻工业学院 Anionic organic particles and preparation and application thereof

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