CN103451997B - Based on the method for displacement suction filtration two-step method shielding paper fibre hydrogen bond - Google Patents
Based on the method for displacement suction filtration two-step method shielding paper fibre hydrogen bond Download PDFInfo
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- CN103451997B CN103451997B CN201310375696.1A CN201310375696A CN103451997B CN 103451997 B CN103451997 B CN 103451997B CN 201310375696 A CN201310375696 A CN 201310375696A CN 103451997 B CN103451997 B CN 103451997B
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Abstract
The invention discloses the method based on displacement suction filtration two-step method shielding paper fibre hydrogen bond, relate to paper making additive and strengthen mechanism field.Comprise the following steps: paper pulp is placed in a reservoir by (1), and add water and acetone, stir, obtain the paper pulp through shielding processing; (2) paper pulp through shielding processing is poured in pumping and filtering device, vacuumize, obtain the scraps of paper; (3) scraps of paper are put into the baker that top is provided with fume hood to dry, obtain the dry scraps of paper; (4), under the scraps of paper of drying being placed in constant-temperature constant-humidity environment, the paper through shielding paper fibre hydrogen bond is obtained.The paper that this method is manufactured paper with pulp can shield the intermolecular hydrogen bonding of more than 80%.The handsheet adopted is the method adopting suction filtration, avoids organic solvent to enter waste water system and then works the mischief to environment, carrying out recycling simultaneously also mitigate financial burden to organic solvent.In oven dry scraps of paper process, add waste gas recovery process, avoid working the mischief to human body and environment.
Description
Technical field
The present invention relates to paper making additive and strengthen mechanism field, particularly based on the processing method of displacement suction filtration two-step method shielding paper fibre hydrogen bond.
Background technology
Paper making intensifier is an important kind of paper making additive, it provides the intensity required for paper, special in recycled writing paper, the PROCESS FOR TREATMENT of pulping making beating in its reuse process, the quality of fiber can be made to produce decay, and then each side characteristic making into paper has obvious decline comparatively before, therefore nowadays the reinforcing agent of recycled writing paper is a popular research direction.But the enhancing mechanism of this analog assistant of great majority is not elaborated, and and none Indentification model getting rid of other interference proves that auxiliary agent has humidification to paper really.
Hydrogen bond accounts for tool critical role between fiber and fiber in adhesion, to paper strength performance important role.Hydrogen bond is intermolecular faint active force, is easily formed away from during electronics in proton part.It is a kind of key (A-H attracted each other between the lone pair electrons of very strong with the upper electronegativity of another key (can be present in same or another kind of molecule) by the hydrogen atom on the very strong A-H key of polarity, atomic radius is less B atom (as F, O, N etc.) ... B).Each glucose basic ring in cellulosic molecule all has 3 hydroxyls, and lay respectively on the 2nd, the 3rd, the 6th carbon atom, the hydroxyl wherein on C6 position is primary hydroxyl group, and the hydroxyl on C2, C3 is secondary hydroxyl group.Between cellulose macromolecule, between cellulose and hydrone, or cellulose macromolecule inside can form hydrogen bond.Lone pair electrons on the oxygen atom that on hydrogen atom in (-OH) base that on cellulosic glucose unit, polarity is very strong and another key, electronegativity is very large, attract each other and form hydrogen bond (-O-H ... O), because cellulose macromolecule is repetitive with basic ring, containing 3 hydroxyls (-OH) in each basic ring, these hydroxyls can form intramolecular hydrogen bond or intermolecular hydrogen bonding in cellulose macromolecule and between cellulose macromolecule, form huge hydrogen bond grid.
To sum up, if think, independent measurement goes out auxiliary agent to the intensity value added becoming paper, and just needing to mask is at least most hydrogen bond.Therefore, work out a kind of method that can shield paper fibre hydrogen bond and just become the necessary condition that research paper making additive strengthens mechanism.
The method of current shielding hydrogen bond is few, and mostly method is before to adopt independent solvent displacement to shield hydrogen bond.But the method is limited to interfibrous hydrogen bond shield effectiveness, generally can only reach the shielding rate of about 40% ~ 50%, therefore truly can not reflect the intensity contribution of obtained auxiliary agent to fiber; And the organic solvent adopted is discharged among environment more, also can to environment.This method adopts repeatedly acetone to wash displacement, and adopt suction method handsheet, ensure on the one hand to mask hydrogen bond as much as possible, make the intensity of paper can reflect the effect of auxiliary agent truly, the solvent adopted on the other hand can recycle, need not be discharged in the middle of nature, it also avoid the pollution that environment is caused.
Summary of the invention
The object of the invention is to provide solvent exchange in conjunction with suction filtration to shield the method for hydrogen bond, does not prove that auxiliary agent has the present situation of the Indentification model of humidification really to paper when getting rid of other interference in order to solve.
Object of the present invention is achieved through the following technical solutions:
(1) paper pulp is placed in a reservoir, and adds water and acetone, stir, obtain the paper pulp through shielding processing;
(2) paper pulp through shielding processing is poured in pumping and filtering device, vacuumize, obtain the scraps of paper;
(3) scraps of paper are put into the baker that top is provided with fume hood to dry, obtain the dry scraps of paper;
(4), under the scraps of paper of drying being placed in constant-temperature constant-humidity environment, after 24 ~ 36 hours, the paper through shielding paper fibre hydrogen bond is obtained.
In said method, paper pulp described in step (1) be biodiversity account for pulp quality 70% ~ 80% regeneration OCC paper pulp.
In said method, described in step (1), the volume ratio of water and acetone is respectively 90/10 ~ 5/95.
In said method, described in step (2), the Funnel diameter of pumping and filtering device is 10cm, and copying and getting the scraps of paper is quantitatively 60 ~ 100g/m2.
In said method, the temperature in constant-temperature constant-humidity environment described in step (4) is 23 ~ 26 DEG C, and humidity is 50% ~ 55%.
In said method, the obtained paper every dry strength index through shielding paper fibre hydrogen bond have dropped 18%-80% compared with the every dry strength index of paper without the method process based on displacement suction filtration two-step method shielding paper fibre hydrogen bond.
In said method, described every dry strength index is respectively breaking length, tensile index and burst index.
Compared with prior art, the present invention has the following advantages and beneficial effect:
(1) paper that this method is manufactured paper with pulp can shield the intermolecular hydrogen bonding of more than 80%, and the intensity major part that the one-tenth paper after making to add auxiliary agent shows is provided by auxiliary agent, reflects the contribution of auxiliary agent to paper strength more realistically.And the interference that hydrogen bond brings is eliminated to follow-up tests.
(2) the handsheet machine that adopts of this method unconventional handsheet machine, but adopt the method for suction filtration, avoid organic solvent to enter waste water system and then environment is worked the mischief, recycling being carried out to organic solvent simultaneously and also mitigate financial burden.
(3) this method adds toxic emission process in oven dry scraps of paper process, avoids working the mischief to human body and environment.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1
For the 60g/m that manufactures paper with pulp
2quantitative paper, take respectively biodiversity account for pulp quality be the paper pulp 8.448g of 77.7% in five containers, be divided into five groups.Wherein first group adds 500mL water, does not add acetone.Second group adds same paper pulp, adds 450mL water and 50mL acetone.3rd group adds same paper pulp, adds 250mL water and 250mL acetone.4th group adds same paper pulp, adds 50mL water and 450mL acetone.5th group adds same paper pulp, does not add water and adds 500mL acetone.
Five groups of paper pulp are poured in container respectively and stirs, and it is in blocks to pour suction filtration in pumping and filtering device into, it is 23 DEG C that oven dry is placed on temperature, and humidity is the constant temperature and humidity condition of 50% after lower 24 hours, measures every dry strength index and breaking length, tensile index and the burst index of paper.
The result that the physical strength measuring paper obtains is as shown in table 1.
The physical strength of the scraps of paper that table 1. this method is manufactured paper with pulp
Can see from table, before adding acetone, the physical strengths such as breaking length, burst index and tensile index are all in relatively high level, after adding acetone gradually, such as adding percentage by volume is after the acetone of 10, becomes the physical strength of paper to have dropped about 18%, and after being finally replaced as acetone completely, intensity on average have dropped nearly 80%, this shows, the method has great role for shielding hydrogen bond to the physical strength becoming paper to provide.
Adopt the 5th group of experiment condition and after adding a kind of homemade amphiprotic polyacrylamide, measure into the physical strength of paper, result is as shown in table 2.
Table 2. adopts optimum experiment condition and the physical strength of the scraps of paper after adding self-control auxiliary agent
As can be seen from Table 2, after adding auxiliary agent, the raising of the physical strength of finished product can be found out, this shows.By the pre-treatment to paper pulp, the raising of synthesized auxiliary agent for paper strength performance can be passed judgment on relatively objectively.
Embodiment 2
For the 80g/m that manufactures paper with pulp
2quantitative paper, taking biodiversity respectively, to account for pulp quality be that the paper pulp 10.211g of 75.4% is in five containers.Experiment is divided into five groups, wherein first group adds 300mL water, does not add acetone.Second group adds same paper pulp, adds 270mL water and 30mL acetone.3rd group adds same paper pulp, adds 150mL water and 150mL acetone.4th group adds same paper pulp, adds 30mL water and 270mL acetone.5th group adds same paper pulp, does not add water and adds 300mL acetone.
Five groups of paper pulp are poured in container respectively and stirs, and it is in blocks to pour suction filtration in pumping and filtering device into, drying and being placed on temperature is 26 DEG C, and humidity is that the constant temperature and humidity condition of 55% is after lower 24 hours, measure the breaking length of paper, tensile index and burst index, result is as shown in table 2.
Table 3. adopts optimum experiment condition and the physical strength of the scraps of paper after adding self-control auxiliary agent
As can be seen from Table 3, after adding auxiliary agent, the raising of the physical strength of finished product can be found out, this shows.By the pre-treatment to paper pulp, the raising of synthesized auxiliary agent for paper strength performance can be passed judgment on relatively objectively.
Embodiment 3
For the 100g/m that manufactures paper with pulp
2quantitative paper, take biodiversity account for pulp quality be 78.3% paper pulp 14.470g put into container, and add 400mL water, do not add acetone.Second group adds same paper pulp, adds 360mL water and 40mL acetone.3rd group adds same paper pulp, adds 200mL water and 200mL acetone.4th group adds same paper pulp, adds 40mL water and 360mL acetone.5th group adds same paper pulp, does not add water and adds 400mL acetone.
Five groups of paper pulp are poured in container respectively and stirs, and it is in blocks to pour suction filtration in pumping and filtering device into, drying and being placed on temperature is 25 DEG C, and humidity is that the constant temperature and humidity condition of 53% is after lower 24 hours, measure the breaking length of paper, tensile index and burst index, result is as shown in table 2.
Table 4. adopts optimum experiment condition and the physical strength of the scraps of paper after adding self-control auxiliary agent
As can be seen from Table 4, after adding auxiliary agent, the raising of the physical strength of finished product can be found out, this shows.By the pre-treatment to paper pulp, the raising of synthesized auxiliary agent for paper strength performance can be passed judgment on relatively objectively.
Claims (5)
1., based on the method for displacement suction filtration two-step method shielding paper fibre hydrogen bond, it is characterized in that, comprise the following steps:
(1) paper pulp is placed in a reservoir, and adds water and acetone, stir, obtain the paper pulp through shielding processing;
(2) paper pulp through shielding processing is poured in pumping and filtering device, vacuumize, obtain the scraps of paper;
(3) scraps of paper are put into the baker that top is provided with fume hood to dry, obtain the dry scraps of paper;
(4), under the scraps of paper of drying being placed in constant-temperature constant-humidity environment, after 24 ~ 36 hours, the paper through shielding paper fibre hydrogen bond is obtained; The obtained paper every dry strength index through shielding paper fibre hydrogen bond have dropped 18%-80% compared with the every dry strength index of paper without the method process based on displacement suction filtration two-step method shielding paper fibre hydrogen bond; Described every dry strength index is respectively breaking length, tensile index and burst index.
2., according to claim 1 based on the method for displacement suction filtration two-step method shielding paper fibre hydrogen bond, it is characterized in that, paper pulp described in step (1) be biodiversity account for pulp quality 70% ~ 80% regeneration OCC paper pulp.
3., according to claim 1 based on the method for displacement suction filtration two-step method shielding paper fibre hydrogen bond, it is characterized in that, described in step (1), the volume ratio of water and acetone is respectively 90/10 ~ 5/95.
4., according to claim 1 based on the method for displacement suction filtration two-step method shielding paper fibre hydrogen bond, it is characterized in that, described in step (2), the Funnel diameter of pumping and filtering device is 10cm, and copying and getting the scraps of paper is quantitatively 60 ~ 100g/m
2.
5., according to claim 1 based on the method for displacement suction filtration two-step method shielding paper fibre hydrogen bond, it is characterized in that, the temperature in constant-temperature constant-humidity environment described in step (4) is 23 ~ 26 DEG C, and humidity is 50% ~ 55%.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831716A (en) * | 2009-03-13 | 2010-09-15 | 北京服装学院 | Preparation method of daiamid-6 fiber with high strength and modulus |
| JP2010261119A (en) * | 2009-05-02 | 2010-11-18 | Seed:Kk | Dehydration device of waste paper-reclaiming apparatus and waste paper-reclaiming apparatus |
| CN101914294A (en) * | 2010-08-26 | 2010-12-15 | 成都新柯力化工科技有限公司 | Paper-imitating biodegradable resin and preparation method |
| CN102702365A (en) * | 2012-05-30 | 2012-10-03 | 华南理工大学 | Method for preparing micro-nano cellulose with ultra-low crystallinity |
| CN102899949A (en) * | 2012-08-10 | 2013-01-30 | 襄垣县鑫瑞达连氏塑木制造有限公司 | Method for preparing cellulose nano-fibril film by utilizing wood powder |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831716A (en) * | 2009-03-13 | 2010-09-15 | 北京服装学院 | Preparation method of daiamid-6 fiber with high strength and modulus |
| JP2010261119A (en) * | 2009-05-02 | 2010-11-18 | Seed:Kk | Dehydration device of waste paper-reclaiming apparatus and waste paper-reclaiming apparatus |
| CN101914294A (en) * | 2010-08-26 | 2010-12-15 | 成都新柯力化工科技有限公司 | Paper-imitating biodegradable resin and preparation method |
| CN102702365A (en) * | 2012-05-30 | 2012-10-03 | 华南理工大学 | Method for preparing micro-nano cellulose with ultra-low crystallinity |
| CN102899949A (en) * | 2012-08-10 | 2013-01-30 | 襄垣县鑫瑞达连氏塑木制造有限公司 | Method for preparing cellulose nano-fibril film by utilizing wood powder |
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