CN106498791A - A kind of pretreatment process for dispersing of superhigh molecular weight polyethylene fibers - Google Patents
A kind of pretreatment process for dispersing of superhigh molecular weight polyethylene fibers Download PDFInfo
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- CN106498791A CN106498791A CN201610920332.0A CN201610920332A CN106498791A CN 106498791 A CN106498791 A CN 106498791A CN 201610920332 A CN201610920332 A CN 201610920332A CN 106498791 A CN106498791 A CN 106498791A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
- D21B1/023—Cleaning wood chips or other raw materials
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/12—Organic non-cellulose fibres from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/14—Polyalkenes, e.g. polystyrene polyethylene
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The present invention relates to a kind of pretreatment process for dispersing of superhigh molecular weight polyethylene fibers, belongs to pulp technology for making paper.Which passes through to wash the impurity such as the oil stain of removal fiber surface, pre-processes permeable fiber with bleeding agent, then discongests fiber by the fiber equipment of discongesting, the superhigh molecular weight polyethylene fibers after further disperseing fiber to be processed finally by dispersant(UHMWPE).The UHMWPE fiber preprocess methods that the present invention is provided cause interfacial tension to reduce, and are that the wet moulding process of follow-up UHMWPE fibrous papers is ready, it is ensured that the UHMWPE fibrous papers of preparation have good evenness.
Description
Technical field
The present invention relates to a kind of pretreatment process for dispersing of superhigh molecular weight polyethylene fibers, belongs to pulp technology for making paper.
Background technology
Ultra-high molecular weight polyethylene (UHMWPE) fiber is the high property in third generation in the world after aramid fiber and carbon fiber
Can special fibre, outward appearance for white, with modulus height, intensity height, light weight, light resistance is good, low temperature resistant, chemical stability is good,
The excellent performance such as long service life, also has high good resistance to chemical attack, specific energy absorption, electromagnetic wave tansmittivity height, rubs
Wipe low, the excellent impact resistance of coefficient and anti-cut performance, and do not absorb water and the features such as good biocompatibility, and be all
The minimum fiber of high-strength high-modulus fibre Midst density, nominal value only have 0.97g/cm-3, it is can uniquely to swim in the high property on the water surface
Can fiber.The features such as HMW of fiber, high-orientation, the height entanglement of strand and high-crystallinity so as to have pole
Good combination property.Its specific strength is current highest in the fiber for using, also higher by 40% than p-aramid fiber, is high-quality steel wire
More than 15 times, be 10 times of ordinary chemical fiber and high-quality steel fibre, be only second to carbon fiber, can be as little as subzero using temperature
150℃.Its combination property has been over aramid fiber.
The multiple excellent characteristics of UHMWPE fibers, make it show great advantage on the market of high-performance fiber.Mesh
Front Aero-Space, ocean development, military affairs, sports goods, architectural engineering reinforce reinforcing material, filtering material, biomaterial,
Strengthen the industries such as composite and obtain different degrees of research application progress.
UHMWPE fibrous papers are prepared using wet therapy forming process, is a kind of new method for preparing UHHMWPE materials, this
The relatively easy, energy consumption in production process of method and technology operation is low, and obtained paper formation is good, and porosity is big, uniform pore diameter, thickness model
Big, good insulating is enclosed, there is in technique very big cost and technical advantage.Using wet-forming technique prepare string or
The Technical comparing of the paper base material of person other chemical fibres is ripe, and the high-strength and high-modulus of UHMWPE materials itself, chemical stability, close
It is all very desirable to spend low premium properties compared to string and other chemical fibres.
Patent publication No. provides a kind of preparation method of meta-position aramid fiber paper for the Chinese invention patent of CN104343041A,
Its dispersing technology is mainly mechanical dispersion, discongests through deflaker after aramid short fiber is discongested through hydrabrusher, will
Aramid fiber fibrid adds hydraulic jet dispersal device to be dispersed into aramid fiber fibrid slurry, then discongests through hydrabrusher,
Centrifugal sereen carries out screening the pulp, the aramid short fiber slurry after passing through the slurry of screen cloth and discongesting is mixed, by mixing slurry
Material without auxiliary agent, directly manufacture paper with pulp through online, press dewatering, drying, obtain body paper.For UHMWPE fibers, the technique
Described mechanism not only bad for fiber dispersion and also the spooling of fiber can be caused to knot so that last formation of sheet
Worse, for the superhigh molecular weight polyethylene fibers of high-strength and high-modulus, mechanical dispersion is unaccommodated.
Patent publication No. is provided using high in the production of larch reducing rules for the Chinese invention patent of CN102268832A
The papermaking of shelves cultural paper, technique papermaking traditionally prepare Cultural Paper, through beating dispersion
Fiber is simultaneously beaten fiber Dao rational freeness range in, after pulping process on net forming, but for UHMWPE fibers
For, traditional beating process will cause the spooling of fiber, and fibre density cannot gently form uniform fibrous suspension, plant
The process for dispersing of fiber is not suitable for UHMWPE fibers, it is necessary to through more pretreatments.
For wet method papermaking process, can fiber uniformly disperse to be to determine whether obtained product quality is qualified
Key factor, in other words, fiber dispersion is bad, it is meant that whole wet method papermaking process cannot be completed.In traditional wet method
In papermaking process, beating is the scattered important step of fiber, and the wet method including existing some other high-performance chemical fibres was manufactured paper with pulp
Journey, beating are also requisite link, and there are UHMWPE fibers high-strength and high-modulus, traditional beating effect cannot cut off fibre
Dimension, but so that fibre matting, this is unfavorable for the dispersion of fiber, is negatively affected to other follow-up techniques on the contrary.In addition,
UHMWPE fibers do not have hydrophilic radical so that fiber has hydrophobicity, and fibre density is less than water, and this is both advantage and hinders
The factor of fiber fine dispersion in water, hydrophobic fibre density itself are little, and fiber can be caused to float, and these are all detrimental to fibre
Tie up scattered factor.Cause the product evenness of later stage preparation not enough, performance will also become negatively affected.The present invention is fine by improving
The hydrophily of dimension, reduces interfacial tension and is aided with appropriate mechanical dispersion to promote the dispersion of fiber.
Content of the invention
It is an object of the invention to provide a kind of pretreatment process for dispersing of the UHMWPE fibers that manufactures paper with pulp suitable for wet method.This
Bright emphasis is to solve the problems, such as that the dispersion of UHMWPE fibers is difficult, mainly through fiber wash-ultrasound pre-process-discongest dispersion-
Dispersant.
According to the technical scheme that the present invention is provided, a kind of pretreatment process for dispersing of superhigh molecular weight polyethylene fibers, step
Suddenly it is:
(1) wash:Superhigh molecular weight polyethylene fibers are taken, and concentration are adopted for 0.1 × l0-3-5.0×l0-3Mol/L solvents
Which is washed, fiber surface impurity is removed;
(2) permeate:Step (1) gained superhigh molecular weight polyethylene fibers are taken, is added according to the 2%-20% of oven dry stock consumption
Enter bleeding agent, fine than being 100-10 according to water:1 adds water, and is then 30-60 DEG C, processes under 20-100kHz ultrasound conditions in temperature
2min-48h, obtains fibrous suspension;
(3) mechanical dispersion:Step (2) gained fibrous suspension is taken, fibre concentration is adjusted to 0.15 ‰ -2.5 ‰, with fibre
The dimension equipment of discongesting discongests fiber, under 1500-4000r/min rotating speeds discongests 2-15min;
(4) dispersant:Discongest in step (3) gained and add in rear mixed liquor relative to oven dry stock consumption
The dispersant of 0.01%-1.5%, 100-1200r/min speed carry out dispersion 30s-3min to mixed liquor, obtain final product super after processing
High molecular weight polyethylene fiber.
In above-mentioned steps, the washing of fiber eliminates the impurity such as the greasy dirt of fiber surface, and these impurity majorities are not hydrophilic
, be attached to the dispersion that fiber surface is unfavorable for fiber, ultrasonically treated enable chemical assistant more fully to act on fiber,
So as to interfacial tension reduces, increase the compatibility of fiber and water, promote the dispersion of fiber.Discongesting will be processed by mechanism
The fiber that crosses further disperses, and mechanical dispersion is complemented each other with the effect of chemical assistant.
Preferably, step (1) solvent is neopelex, lauryl sodium sulfate, acetone or alcohol.
Preferably, step (2) bleeding agent is fatty alcohol polyoxyalkyl ether, AEO, sulfosuccinate
One or more in dioctyl phthalate sodium salt or APES.
Preferably, step (3) dispersant be polyethylene glycol oxide, AEO methyl-monosilane, oleic acid gather
Oxygen ethene fat, sodium carboxymethylcellulose, alkyl diphenyl ether sodium sulfonate, APES phosphate ester salt, octadecylamine,
One or more in methylcellulose, Tween-80, Tween-60, sodium pyrophosphate, hexamethyl sodium phosphate etc..
Beneficial effects of the present invention:The UHMWPE fiber preprocess methods that the present invention is provided cause interfacial tension to reduce, and are
The wet moulding process of follow-up UHMWPE fibrous papers is ready, it is ensured that the UHMWPE fibrous papers of preparation have good even
Degree.
Specific embodiment
In order to be more clearly understood that the technology contents of the present invention, describe in detail especially exemplified by following examples, embodiment is only
Partial data is provided, does not represent the dispersion effect of whole UHMWPE fibers.
Embodiment 1
(1) wash:With 1.2 × 10-3The neopelex washing fiber of mol/L, will be clean for Fiber wash rear low
Warm dry for standby;
(2) permeate:With the 5% of oven dry stock consumption AEO pretreatment of fiber, water fibre compares 18:1,30-
60 DEG C, 40kHz sonication treatment time 2min;
(3) mechanical dispersion:Fibre concentration is adjusted to 0.78 ‰, fiber is discongested with the fiber equipment of discongesting, 20 DEG C,
5min is discongested under 2500r/min rotating speeds;
(4) dispersant:The polyethylene glycol oxide (PEO) relative to oven dry stock consumption 0.06% is added, 800r/min is stirred
Mix 1min.
Embodiment 2
(1) wash:With embodiment 1;
(2) permeate:With the AEO pretreatment of fiber of oven dry stock consumption 5%, water fibre compares 18:1,30-60
DEG C, 40kHz sonication treatment time 20min;
(3) mechanical dispersion:Fibre concentration is adjusted to 0.78 ‰, fiber is discongested with the fiber equipment of discongesting, in 2500r/min
10min is discongested under rotating speed;
(4) dispersant:The polyethylene glycol oxide (PEO) relative to oven dry stock consumption 0.10% is added, 800r/min is stirred
Mix 1min.
Embodiment 3
(1) wash:With embodiment 1;
(2) permeate:With the AEO pretreatment of fiber of oven dry stock consumption 5%, water fibre compares 18:1,30-60
DEG C, 40kHz sonication treatment time 100min;
(3) mechanical dispersion:Fibre concentration is adjusted to 0.78 ‰, fiber is discongested with the fiber equipment of discongesting, in 2500r/min
25min is discongested under rotating speed;
(4) dispersant:The polyethylene glycol oxide (PEO) of oven dry stock consumption 0.14%, 800r/min is added to stir 1min
Embodiment 4
(1) wash:With embodiment 1;
(2) permeate:With the AEO pretreatment of fiber of oven dry stock consumption 10%, water fibre compares 18:1,30-60
DEG C, 40kHz sonication treatment time 2min;
(3) mechanical dispersion:Fibre concentration is adjusted to 0.78 ‰, fiber is discongested with the fiber equipment of discongesting, in 2500r/min
10min is discongested under rotating speed;
(4) dispersant:The polyethylene glycol oxide (PEO) of oven dry stock consumption 0.14%, 800r/min is added to stir 1min.
Embodiment 5
(1) wash:With embodiment 1;
(2) permeate:With the AEO pretreatment of fiber of oven dry stock consumption 10%, water fibre compares 18:1,30-60
DEG C, 40kHz sonication treatment time 20min;
(3) mechanical dispersion:Fibre concentration is adjusted to 0.78 ‰, fiber is discongested with the fiber equipment of discongesting, in 2500r/min
25min is discongested under rotating speed;
(4) dispersant:The polyethylene glycol oxide (PEO) of oven dry stock consumption 0.06%, 800r/min is added to stir 1min.
Embodiment 6
(1) wash:With embodiment 1;
(2) permeate:With the AEO pretreatment of fiber of oven dry stock consumption 10%, water fibre compares 18:1,30-60
DEG C, 40kHz sonication treatment time 100min;
(3) mechanical dispersion:Fibre concentration is adjusted to 0.78 ‰, fiber is discongested with the fiber equipment of discongesting, in 2500r/min
5min is discongested under rotating speed;
(4) dispersant:The polyethylene glycol oxide (PEO) of oven dry stock consumption 0.10%, 800r/min is added to stir 1min.
Embodiment 7
(1) wash:With embodiment 1;
(2) permeate:With the AEO pretreatment of fiber of oven dry stock consumption 15%, water fibre compares 18:1,30-60
DEG C, 40kHz sonication treatment time 2min;
(3) mechanical dispersion:Fibre concentration is adjusted to 0.78 ‰, fiber is discongested with the fiber equipment of discongesting, in 2500r/min
25min is discongested under rotating speed;
(4) dispersant:The polyethylene glycol oxide (PEO) of oven dry stock consumption 0.10%, 800r/min is added to stir 1min.
Embodiment 8
(1) wash:With embodiment 1;
(2) permeate:With the AEO pretreatment of fiber of oven dry stock consumption 15%, water fibre compares 18:1,30-60
DEG C, 40kHz sonication treatment time 20min;
(3) mechanical dispersion:Fibre concentration is adjusted to 0.78 ‰, fiber is discongested with the fiber equipment of discongesting, in 2500r/min
5min is discongested under rotating speed;
(4) dispersant:The polyethylene glycol oxide (PEO) of oven dry stock consumption 0.14%, 800r/min is added to stir 1min.
Embodiment 9
(1) wash:With embodiment 1;
(2) permeate:With the AEO pretreatment of fiber of oven dry stock consumption 15%, water fibre compares 18:1,30-60
DEG C, 40kHz sonication treatment time 100min;
(3) mechanical dispersion:Fibre concentration is adjusted to 0.78 ‰, fiber is discongested with the fiber equipment of discongesting, in 2500r/min
10min is discongested under rotating speed;
(4) dispersant:The polyethylene glycol oxide (PEO) of oven dry stock consumption 0.06%, 800r/min is added to stir 1min.
The tensile index of paper prepared by 1 different pretreatments technique of table
A kind of pretreatment process for dispersing of 9 superhigh molecular weight polyethylene fibers of embodiment, step is:
(1) wash:Superhigh molecular weight polyethylene fibers are taken, and concentration are adopted for 5.0 × l0-3Mol/L acetone solvents enter to which
Row washing, removes fiber surface impurity;
(2) permeate:Step (1) gained superhigh molecular weight polyethylene fibers are taken, is oozed according to 20% addition of oven dry stock consumption
Agent aerosol-OT salt and AEO, fine than being 100 according to water thoroughly:1 adds water, and then in temperature is
30-60 DEG C, process 48h under 20kHz ultrasound conditions, obtain fibrous suspension;
(3) mechanical dispersion:Step (2) gained fibrous suspension is taken, fibre concentration is adjusted to 2.5 ‰, is discongested with fiber
Equipment discongests fiber, under 1500r/min rotating speeds discongests 15min;
(4) dispersant:Step (3) gained discongest add in rear mixed liquor relative to oven dry stock consumption 1.5%
Dispersant, 100r/min speed carries out dispersion 3min to mixed liquor.
A kind of pretreatment process for dispersing of 10 superhigh molecular weight polyethylene fibers of embodiment, step is:
(1) wash:Superhigh molecular weight polyethylene fibers are taken, and concentration are adopted for 3.0 × l0-3Mol/L solvent dodecyl sulphur
Sour sodium is washed to which, removes fiber surface impurity;
(2) permeate:Step (1) gained superhigh molecular weight polyethylene fibers are taken, is oozed according to 20% addition of oven dry stock consumption
Agent APES, fine than being 10 according to water thoroughly:1 adds water, then temperature be 30-60 DEG C, 100kHz ultrasound conditions
Lower process 2h, obtains fibrous suspension;
(3) mechanical dispersion:Step (2) gained fibrous suspension is taken, fibre concentration is adjusted to 0.15 ‰, is discongested with fiber
Equipment discongests fiber, under 4000r/min rotating speeds discongests 2min;
(4) dispersant:Step (3) gained discongest add in rear mixed liquor relative to oven dry stock consumption 0.01%
Dispersant Tween-80 and Tween-60,1200r/min speed carries out dispersion 30smin to mixed liquor, obtains final product the superelevation after processing
Molecular weight polyethylene fiber.
A kind of pretreatment process for dispersing of 11 superhigh molecular weight polyethylene fibers of embodiment, step is:
(1) wash:Superhigh molecular weight polyethylene fibers are taken, and concentration are adopted for 4.0 × l0-3Mol/L etoh solvents enter to which
Row washing, removes fiber surface impurity;
(2) permeate:Step (1) gained superhigh molecular weight polyethylene fibers are taken, according to 2% addition infiltration of oven dry stock consumption
Agent APES, fine than being 70 according to water:1 adds water, and is then 30-60 DEG C, locates under 80kHz ultrasound conditions in temperature
Reason 36h, obtains fibrous suspension;
(3) mechanical dispersion:Step (2) gained fibrous suspension is taken, fibre concentration is adjusted to 2 ‰, is discongested with fiber and is set
For fiber is discongested, under 3000r/min rotating speeds, discongest 9min;
(4) dispersant:Step (3) gained discongest add in rear mixed liquor relative to oven dry stock consumption 1.2%
Dispersant octadecylamine, 300r/min speed carries out dispersion 2min to mixed liquor, obtains final product the super high molecular weight after processing and gathers
Vinyl fiber.
Claims (4)
1. a kind of pretreatment process for dispersing of superhigh molecular weight polyethylene fibers, is characterized in that step is:
(1)Washing:Superhigh molecular weight polyethylene fibers are taken, and concentration are adopted for 0.1 × l0-3-5.0×l0-3Mol/L solvents enter to which
Row washing, removes fiber surface impurity;
(2)Infiltration:Take step(1)Gained superhigh molecular weight polyethylene fibers, add infiltration according to the 2%-20% of oven dry stock consumption
Agent, fine than being 100-10 according to water:1 adds water, and is then 30-60 DEG C, processes 2min- under 20-100kHz ultrasound conditions in temperature
48h, obtains fibrous suspension;
(3)Mechanical dispersion:Take step(2)Gained fibrous suspension, fibre concentration is adjusted to 0.15 ‰ -2.5 ‰, is dredged with fiber
Solution equipment discongests fiber, under 1500-4000r/min rotating speeds discongests 2-15min;
(4)Dispersant:In step(3)Gained discongests the 0.01%-1.5% added in rear mixed liquor relative to oven dry stock consumption
Dispersant, 100-1200r/min speed carries out dispersion 30s-3min to mixed liquor, obtains final product the superhigh molecular weight polyethylene after processing
Alkene fiber.
2. the pretreatment process for dispersing of superhigh molecular weight polyethylene fibers as claimed in claim 1, is characterized in that:Step(1)Institute
It is neopelex, lauryl sodium sulfate, acetone or alcohol to state solvent.
3. the pretreatment process for dispersing of superhigh molecular weight polyethylene fibers as claimed in claim 1, is characterized in that:Step(2)Institute
It is fatty alcohol polyoxyalkyl ether, AEO, aerosol-OT salt or alkyl phenol polyoxy to state bleeding agent
One or more in vinethene.
4. the pretreatment process for dispersing of superhigh molecular weight polyethylene fibers as claimed in claim 1, is characterized in that:Step(3)Institute
State dispersant be polyethylene glycol oxide, AEO methyl-monosilane, oleic acid polyoxyethylene fat, sodium carboxymethylcellulose,
Alkyl diphenyl ether sodium sulfonate, APES phosphate ester salt, octadecylamine, methylcellulose, Tween-80, tween-
60th, one or more in sodium pyrophosphate, hexamethyl sodium phosphate etc..
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CN113174770A (en) * | 2021-04-27 | 2021-07-27 | 中南林业科技大学 | Method for pretreating poplar fibers by penetrant synergistic phosphoric acid infiltration coupling steam explosion |
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