CN105178088A - Method for preparing water absorbent fiber - Google Patents
Method for preparing water absorbent fiber Download PDFInfo
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- CN105178088A CN105178088A CN201510490821.2A CN201510490821A CN105178088A CN 105178088 A CN105178088 A CN 105178088A CN 201510490821 A CN201510490821 A CN 201510490821A CN 105178088 A CN105178088 A CN 105178088A
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- water
- cellulase
- absorption fiber
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Abstract
The invention discloses a method for preparing a water absorbent fiber. The method comprises the following steps: 1) adjusting the pH value of a fiber slurry to 5-6.5, adding cellulase under stirring, and insulating in a water bath to obtain a cellulase pretreated slurry; 2) adding water to a methyl vinyl ether / maleic anhydride copolymer and polyethylene glycol, mixing well to obtain a solution 1, mixing the solution 1 with the cellulase pretreated slurry, stirring, and drying at 50-70 DEG C; placing in 120-140 DEG C to obtain the water absorbent fiber. The method of the invention can generate more pore structure in the cellulose fiber, provide more space and combination points for cross-linking and grafting copolymerization, abs greatly improve the water absorption performance of the water absorbent fiber. The method has simple operation, and the obtained water absorbent fiber has high water absorbent capability.
Description
Technical field
The invention belongs to macromolecular material and pulping and paper-making field, be specifically related to a kind of preparation method of water-absorption fiber.
Background technology
Super absorbent resin (SAPs) uses now to obtain the most a kind of high-absorbent material, and it can absorb is the water yield of own wt several thousand times.Because its good water imbibition and water-retaining property are widely applied in disposable sanitary articles.But super absorbent resin is mainly derived from acrylamide (Am), acrylic acid (AA) monomer and crosslinking agent, wherein major part is petroleum base non-renewable resources, does not have biodegradability, can cause environmental pollution.Based on to the protection of environment and the sustainable development of resource, cellulose products becomes study hotspot, and scientific research personnel starts to prepare cellulose base high-absorbent material and replaces with part and use maximum high exhaustion (SAPs) at present.Cellulose is the organic material that on the earth, content is the abundantest, and annual output is more than 7,500,000,000 tons, and it is renewable is well-known with biodegradable.Cellulose is degradable macromolecular compound, and containing the hydrophilic radical such as hydroxyl and carboxyl in cellulose, by means such as crosslinked, grafting, chemical modification is carried out to it, introduce more hydrophilic radical to improve its water absorbing properties, due to cellulosic pore structure properties, in the process of crosslinked, graft copolymerization, easily make its pore structure close, thus the water absorbing properties of restriction cellulose-based water absorbent material.
Summary of the invention
The object of this invention is to provide a kind of preparation method of water-absorption fiber.
Technical method of the present invention is summarized as follows:
A preparation method for water-absorption fiber, comprises the steps:
1) pH to 5-6.5 is regulated to the fibre stuff that mass concentration is 1%-5%, under the rotating speed of 300-800rpm stirs, add cellulase, make the mass fraction of cellulase be 0.02%-0.5%, at the water bath heat preservation process 0.5h-3h of 45 DEG C-50 DEG C, obtain cellulase pretreatment slurry;
2) Copolymer of Methyl Vinyl Ether/Maleic Anhydride and polyethylene glycol are added water mix to obtain solution 1, solution 1 is mixed with cellulase pretreatment slurry, stir 0.5-1.5h, dry under the condition of 50-70 DEG C; At the temperature of 120-140 DEG C, place 2-15min, obtain water-absorption fiber, the mass ratio of described cellulase pretreatment slurry, Copolymer of Methyl Vinyl Ether/Maleic Anhydride, polyethylene glycol is 1:0.5-2:0.12-0.3.
The mass concentration of fibre stuff preferably 3%.
Fibre stuff is bleached softwood wood sulfate pulp, bleaching broad-leaved wood sulphate pulp or mechanical pulp.
The bleached softwood wood preferred dragon spruce bleached kraft pulp of sulfate pulp or Southern Pine bleached kraft pulp.
The bleaching preferred poplar bleached kraft pulp of broad-leaved wood sulphate pulp or Eucalyptus bleached kraft pulp.
Mechanical pulp preferred poplar bleached chemical thermomechanical pulp or maple high yield pulp.
The preferred 500rpm of step (1) described rotating speed.
The temperature preferably 130 DEG C that step (2) is placed, the time preferred 6.5min of placement.
The preferred PEG3350 of polyethylene glycol or polyethylene glycol 1450.
Cellulase process pulp fiber of the present invention, can make cellulose fibre produce more pore structure, for crosslinked, graft copolymerization provide more space and binding site, substantially increases the water absorbing properties of modified cellulose fibre.Method of the present invention is simple to operate, and the water absorbing capacity of the water-absorption fiber obtained is high.
Detailed description of the invention
The following examples understand the present invention better to enable those skilled in the art to, but and do not limit the present invention in any way.
Copolymer of Methyl Vinyl Ether/Maleic Anhydride and polyethylene glycol play the effect of crosslinking agent.
The activity of the cellulase of each embodiment is 700EGU/g.
Embodiment 1
A preparation method for water-absorption fiber, comprises the steps:
1) the poplar bleached chemical thermomechanical pulp adjustment pH to 5.5 that four parts of mass concentrations are 3% is measured, under the rotating speed of 500rpm stirs, portion does not add cellulase, its excess-three part adds cellulase, the mass fraction of cellulase is made to be respectively 0.02%, 0.04% and 0.5%, at the water bath heat preservation process 1h of 50 DEG C, obtain cellulase pretreatment slurry;
2) Copolymer of Methyl Vinyl Ether/Maleic Anhydride and PEG3350 are added water mix to obtain solution 1, solution 1 is mixed with cellulase pretreatment slurry, stir 1h, under the condition of 65 DEG C, be dried to its quality no longer change; At the temperature of 130 DEG C, place (namely solidifying) 6.5min, obtain water-absorption fiber, the mass ratio of described cellulase pretreatment slurry, Copolymer of Methyl Vinyl Ether/Maleic Anhydride, PEG3350 is 1:1.12:0.17.
Water-absorption fiber is scattered in deionized water, regulates its pH=8 to make its abundant swollen, measure its water absorbing capacity.
The impact of cellulase consumption on poplar bleached chemical thermomechanical pulp fibrous absorbent ability is as shown in table 1, and along with the increase gradually of cellulase consumption, water absorbing capacity obviously rises.
Table 1 cellulase consumption is on the impact of poplar bleached chemical thermomechanical pulp fibrous absorbent ability
Embodiment 2
A preparation method for water-absorption fiber, comprises the steps:
1) the maple high yield pulp adjustment pH to 6.5 that four parts of mass concentrations are 1% is measured, under the rotating speed of 300rpm stirs, portion does not add cellulase, its excess-three part adds cellulase, the mass fraction of cellulase is made to be respectively 0.02%, 0.04% and 0.5%, at the water bath heat preservation process 0.5h of 45 DEG C, obtain cellulase pretreatment slurry;
2) Copolymer of Methyl Vinyl Ether/Maleic Anhydride and polyethylene glycol 1450 are added water mix to obtain solution 1, solution 1 is mixed with cellulase pretreatment slurry, stir 0.5h, under the condition of 50 DEG C, be dried to its quality no longer change; At the temperature of 140 DEG C, place (namely solidifying) 2min, obtain water-absorption fiber, the mass ratio of described cellulase pretreatment slurry, Copolymer of Methyl Vinyl Ether/Maleic Anhydride, polyethylene glycol 1450 is 1:0.5:0.12.
Survey water-absorption fiber water absorbing capacity prepared by the present embodiment.
The impact of cellulase consumption on maple high yield pulp fibrous absorbent ability is as shown in table 2, and along with the increase gradually of cellulase consumption, water absorbing capacity obviously rises.
Table 2 cellulase consumption is on the impact of maple high yield pulp fibrous absorbent ability
Embodiment 3
A preparation method for water-absorption fiber, comprises the steps:
1) the poplar bleached kraft pulp adjustment pH to 5 that four parts of mass concentrations are 5% is measured, under the rotating speed of 800rpm stirs, portion does not add cellulase, its excess-three part adds cellulase, the mass fraction of cellulase is made to be respectively 0.02%, 0.04% and 0.5%, at the water bath heat preservation process 3h of 45 DEG C, obtain cellulase pretreatment slurry;
2) Copolymer of Methyl Vinyl Ether/Maleic Anhydride and PEG3350 are added water mix to obtain solution 1, solution 1 is mixed with cellulase pretreatment slurry, stir 1.5h, under the condition of 70 DEG C, be dried to its quality no longer change; At the temperature of 120 DEG C, place (namely solidifying) 15min, obtain water-absorption fiber, the mass ratio of described cellulase pretreatment slurry, Copolymer of Methyl Vinyl Ether/Maleic Anhydride, PEG3350 is 1:2:0.3.
Survey water-absorption fiber water absorbing capacity prepared by the present embodiment.
The impact of cellulase consumption on poplar bleached kraft pulp fibrous absorbent ability is as shown in table 3, and along with the increase gradually of cellulase consumption, water absorbing capacity obviously rises.
Table 3 cellulase consumption is on the impact of poplar bleached kraft pulp fibrous absorbent ability
Substitute the poplar bleached kraft pulp of the present embodiment with Eucalyptus bleached kraft pulp, other same the present embodiment, the water-absorption fiber obtained is when cellulase consumption is identical with shown in table 3, and its water-absorbing-retaining value is similar to the result shown in table 3.
Embodiment 4
A preparation method for water-absorption fiber, comprises the steps:
1) the dragon spruce bleached kraft pulp adjustment pH to 5.5 that four parts of mass concentrations are 3% is measured, under the rotating speed of 600rpm stirs, portion does not add cellulase, its excess-three part adds cellulase, the mass fraction of cellulase is made to be respectively 0.02%, 0.08% and 0.5%, at the water bath heat preservation process 2h of 50 DEG C, obtain cellulase pretreatment slurry;
2) Copolymer of Methyl Vinyl Ether/Maleic Anhydride and PEG3350 are added water mix to obtain solution 1, solution 1 is mixed with cellulase pretreatment slurry, stir 1h, under the condition of 70 DEG C, be dried to its quality no longer change; At the temperature of 120 DEG C, place (namely solidifying) 15min, obtain water-absorption fiber, the mass ratio of described cellulase pretreatment slurry, Copolymer of Methyl Vinyl Ether/Maleic Anhydride, PEG3350 is 1:1.12:0.17.
Survey water-absorption fiber water absorbing capacity prepared by the present embodiment.
The impact of cellulase consumption on dragon spruce bleached kraft pulp fibrous absorbent ability is as shown in table 4, and along with the increase gradually of cellulase consumption, water absorbing capacity obviously rises.
Table 4 cellulase consumption is on the impact of dragon spruce bleached kraft pulp fibrous absorbent ability
Substitute the dragon spruce bleached kraft pulp of the present embodiment with Southern Pine bleached kraft pulp, other same the present embodiment, the water-absorption fiber obtained is when cellulase consumption is identical with shown in table 4, and its water-absorbing-retaining value is similar to the result shown in table 4.
Claims (10)
1. a preparation method for water-absorption fiber, its feature comprises the steps:
1) pH to 5-6.5 is regulated to the fibre stuff that mass concentration is 1%-5%, under the rotating speed of 300-800rpm stirs, add cellulase, make the mass fraction of cellulase be 0.02%-0.5%, at the water bath heat preservation process 0.5h-3h of 45 DEG C-50 DEG C, obtain cellulase pretreatment slurry;
2) Copolymer of Methyl Vinyl Ether/Maleic Anhydride and polyethylene glycol are added water mix to obtain solution 1, solution 1 is mixed with cellulase pretreatment slurry, stir 0.5-1.5h, dry under the condition of 50-70 DEG C; At the temperature of 120-140 DEG C, place 2-15min, obtain water-absorption fiber, the mass ratio of described cellulase pretreatment slurry, Copolymer of Methyl Vinyl Ether/Maleic Anhydride, polyethylene glycol is 1:0.5-2:0.12-0.3.
2. the preparation method of a kind of water-absorption fiber according to claim 1, is characterized in that the mass concentration of described fibre stuff is 3%.
3. the preparation method of a kind of water-absorption fiber according to claim 1 and 2, is characterized in that described fibre stuff is bleached softwood wood sulfate pulp, bleaching broad-leaved wood sulphate pulp or mechanical pulp.
4. the preparation method of a kind of water-absorption fiber according to claim 3, is characterized in that described bleached softwood wood sulfate pulp is dragon spruce bleached kraft pulp or Southern Pine bleached kraft pulp.
5. the preparation method of a kind of water-absorption fiber according to claim 3, is characterized in that described bleaching broad-leaved wood sulphate pulp is poplar bleached kraft pulp or Eucalyptus bleached kraft pulp.
6. the preparation method of a kind of water-absorption fiber according to claim 3, is characterized in that described mechanical pulp is poplar bleached chemical thermomechanical pulp or maple high yield pulp.
7. the preparation method of a kind of water-absorption fiber according to claim 1, is characterized in that described step (1) described rotating speed is 500rpm.
8. the preparation method of a kind of water-absorption fiber according to claim 1, is characterized in that the mass fraction of described cellulase is 0.08%.
9. the preparation method of a kind of water-absorption fiber according to claim 1, it is characterized in that the temperature that described step (2) is placed is 130 DEG C, the time of placement is 6.5min.
10. the preparation method of a kind of water-absorption fiber according to claim 1, is characterized in that described polyethylene glycol is PEG3350 or polyethylene glycol 1450.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510490821.2A CN105178088A (en) | 2015-08-10 | 2015-08-10 | Method for preparing water absorbent fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510490821.2A CN105178088A (en) | 2015-08-10 | 2015-08-10 | Method for preparing water absorbent fiber |
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| CN105178088A true CN105178088A (en) | 2015-12-23 |
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| CN201510490821.2A Pending CN105178088A (en) | 2015-08-10 | 2015-08-10 | Method for preparing water absorbent fiber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115295964A (en) * | 2022-09-02 | 2022-11-04 | 上海恩捷新材料科技有限公司 | Lithium ion battery coating diaphragm |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030024663A1 (en) * | 2002-07-19 | 2003-02-06 | Neogi Amar N. | Superabsorbent cellulosic fiber |
| CN1814911A (en) * | 2006-02-28 | 2006-08-09 | 山东轻工业学院 | Swlfate wood-pulp enzyme-method modifying process |
| CN102797193A (en) * | 2011-05-26 | 2012-11-28 | 金东纸业（江苏）股份有限公司 | Paper pulp processing method and coated paper manufacturing method |
-
2015
- 2015-08-10 CN CN201510490821.2A patent/CN105178088A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030024663A1 (en) * | 2002-07-19 | 2003-02-06 | Neogi Amar N. | Superabsorbent cellulosic fiber |
| CN1814911A (en) * | 2006-02-28 | 2006-08-09 | 山东轻工业学院 | Swlfate wood-pulp enzyme-method modifying process |
| CN102797193A (en) * | 2011-05-26 | 2012-11-28 | 金东纸业（江苏）股份有限公司 | Paper pulp processing method and coated paper manufacturing method |
Non-Patent Citations (1)
| Title |
|---|
| PAN S等: "Preparation of superabsorbent cellulosic hydrogels", 《CARBOHYDRATE POLYMERS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115295964A (en) * | 2022-09-02 | 2022-11-04 | 上海恩捷新材料科技有限公司 | Lithium ion battery coating diaphragm |
| CN115295964B (en) * | 2022-09-02 | 2023-06-23 | 上海恩捷新材料科技有限公司 | Lithium ion battery coating diaphragm |
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Application publication date: 20151223 |
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