CN106498791B - 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 PDF

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CN106498791B
CN106498791B CN201610920332.0A CN201610920332A CN106498791B CN 106498791 B CN106498791 B CN 106498791B CN 201610920332 A CN201610920332 A CN 201610920332A CN 106498791 B CN106498791 B CN 106498791B
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fiber
molecular weight
weight polyethylene
superhigh molecular
dispersant
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CN106498791A (en
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龙柱
王长红
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Jiangnan University
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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, belong to pulp technology for making paper.It removes the impurity such as the oil stain of fiber surface by washing, and pre-processes permeable fiber with bleeding agent, then discongests equipment by fiber and discongest fiber, and the superhigh molecular weight polyethylene fibers after fiber is handled further are disperseed finally by dispersant（UHMWPE）.UHMWPE fibers preprocess method provided by the invention causes interfacial tension to reduce, and is ready for the wet moulding process of follow-up UHMWPE fibrous papers, ensure that the UHMWPE fibrous papers of preparation has good evenness.

Description

A kind of pretreatment process for dispersing of superhigh molecular weight polyethylene fibers
Technical field
The present invention relates to a kind of pretreatment process for dispersing of superhigh molecular weight polyethylene fibers, belong to pulp technology for making paper.
Background technology
Ultra-high molecular weight polyethylene（UHMWPE）Fiber is the high property in the third generation in the world after aramid fiber and carbon fiber Can special fibre, outward appearance for white, have modulus height, intensity height, light weight, light resistance is good, low temperature resistant, chemical stability is good, The excellent performances such as service life length, also there is well resistant to chemical etching, specific energy absorption is high, electromagnetic wave tansmittivity is high, rubs Low, the excellent impact resistance of coefficient and anti-cut performance are wiped, and is not absorbed water and the features such as good biocompatibility, and is all The minimum fiber of high-strength high-modulus fibre Midst density, nominal value only have 0.97g/cm-3, it is the high property that can uniquely swim on the water surface Can fiber.The HMW of fiber, high-orientation, the height of strand are tangled and the features such as high-crystallinities, it is possessed pole Good combination property.Its specific strength is the highest in the fiber used at present, 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, temperature in use can be as little as subzero 150℃.Its combination property has been over aramid fiber.
The a variety of excellent characteristics of UHMWPE fibers, make it show great advantage in the in the market of high-performance fiber.Mesh It is preceding 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, are a kind of new methods for preparing UHHMWPE materials, it is this Method and technology operation is relatively easy, energy consumption in production process is low, and obtained paper formation is good, and porosity is big, uniform pore diameter, thickness model Enclose greatly, good insulating, there is very big cost and technical advantage in technique.Using wet-forming technique prepare string or The Technical comparing of the paper base material of the other chemical fibres of person is ripe, and UHMWPE materials high-strength and high-modulus in 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 CN104343041A Chinese invention patent, Its dispersing technology is mainly mechanical dispersion, and aramid short fiber is discongested after hydrabrusher is discongested through deflaker, will Aramid fiber fibrid adds hydraulic jet dispersal device and is dispersed into aramid fiber fibrid slurry, then is discongested by hydrabrusher, Centrifugal sereen carries out screening the pulp, will be mixed by the slurry of screen cloth with the aramid short fiber slurry after discongesting, by mixing slurry Material do not add auxiliary agent, directly through online manufacture paper with pulp, press dewatering, drying, obtain body paper.For UHMWPE fibers, the technique Described mechanism is not only bad for the scattered of fiber and 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 unsuitable.
Patent publication No. is provided using high in the production of larch reducing rules for CN102268832A Chinese invention patent The pulping and papermaking process of shelves cultural paper, the pulping and papermaking process of the technique traditionally prepare Cultural Paper, scattered by being beaten Fiber simultaneously by fiber mashing in rational freeness range, after pulping process on net forming, but for UHMWPE fibers For, traditional beating process will cause the spooling of fiber, and fibre density can not gently form uniform fibrous suspension, plant The process for dispersing of fiber is not suitable for UHMWPE fibers, it is necessary to by more pretreatments.
For wet method papermaking process, can fiber uniformly disperse to be whether product quality made from decision is qualified An important factor for, in other words, fiber disperses bad, it is meant that whole wet method papermaking process can not be completed.In traditional wet method In papermaking process, mashing is the scattered important step of fiber, including the wet method of existing some other high-performance chemical fibres was manufactured paper with pulp Journey, mashing and essential link, and UHMWPE fibers have high-strength and high-modulus, traditional mashing effect can not cut off fibre Dimension, but cause fibre matting, this is unfavorable for the scattered of fiber, is negatively affected on the contrary to other follow-up techniques.In addition, UHMWPE fibers do not have hydrophilic radical so that fiber has hydrophobicity, and fibre density is smaller than water, and this is both advantage and obstruction The factor of fiber fine dispersion in water, hydrophobic fibre density itself is small, fiber can be caused to float, these are all detrimental to fibre The scattered factor of dimension.Cause the later stage prepare product evenness it is inadequate, performance will also become negatively affected.The present invention is fine by improving The hydrophily of dimension, reduce interfacial tension and be aided with appropriate mechanical dispersion to promote the scattered of fiber.
The content of the invention
It is an object of the invention to provide a kind of pretreatment process for dispersing for the UHMWPE fibers manufactured paper with pulp suitable for wet method.This hair Bright emphasis is that to solve the problems, such as that UHMWPE fibers disperse difficult, mainly by fiber wash-ultrasound pre-processes-discongest it is scattered- Dispersant.
According to technical scheme provided by the invention, a kind of pretreatment process for dispersing of superhigh molecular weight polyethylene fibers, step Suddenly it is：
（1）Washing：Superhigh molecular weight polyethylene fibers are taken, use concentration as 0.1 × l0-3-5.0×l0-3Mol/L solvents It is washed, removes fiber surface impurity；
（2）Infiltration：Take step（1）Gained superhigh molecular weight polyethylene fibers, added according to the 2%-20% of oven dry stock dosage Bleeding agent, it is 100-10 according to the fine ratio of water:1 adds water, is then 30-60 DEG C, is handled under 20-100kHz ultrasound conditions in temperature 2min-48h, obtain fibrous suspension；
（3）Mechanical dispersion：Take step（2）Gained fibrous suspension, fibre concentration is adjusted to 0.15 ‰ -2.5 ‰, with fibre Dimension discongests equipment and discongests fiber, and 2-15min is discongested under 1500-4000r/min rotating speeds；
（4）Dispersant：In step（3）Gained discongests the 0.01%- added in rear mixed liquor relative to oven dry stock dosage 1.5% dispersant, 100-1200r/min speed carry out scattered 30s-3min to mixed liquor, produce the super high molecular weight after processing Polyethylene fibre.
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 , it is attached to fiber surface and is unfavorable for the scattered of fiber, supersound process enables chemical assistant more fully to act on fiber, So as to which interfacial tension reduces, increase the compatibility of fiber and water, promote the scattered of fiber.Discongesting will be handled by mechanism The fiber crossed further disperses, and the effect of mechanical dispersion and chemical assistant is complemented each other.
Preferably, step（1）The solvent is neopelex, lauryl sodium sulfate, acetone or alcohol.
Preferably, step（2）The bleeding agent is fatty alcohol polyoxyalkyl ether, AEO, sulfosuccinate One or more in dioctyl phthalate sodium salt or APES.
Preferably, step（4）The dispersant is that 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：UHMWPE fibers preprocess method provided by the invention causes interfacial tension to reduce, and is The wet moulding process of follow-up UHMWPE fibrous papers is ready, and ensure that the UHMWPE fibrous papers of preparation and has well even Degree.
Embodiment
In order to be more clearly understood that the technology contents of the present invention, described 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）Washing：With 1.2 × 10-3Mol/L neopelex washing fiber is clean rear low by Fiber wash Temperature is dried for standby；
（2）Infiltration：With 5% AEO pretreatment of fiber of oven dry stock dosage, water fibre ratio 18:1,30- 60 DEG C, 40kHz sonication treatment times 2min；
（3）Mechanical dispersion：Fibre concentration is adjusted to 0.78 ‰, equipment is discongested with fiber and discongests fiber, 20 DEG C, 5min is discongested under 2500r/min rotating speeds；
（4）Dispersant：Add the polyethylene glycol oxide relative to oven dry stock dosage 0.06%（PEO）, 800r/min stirs Mix 1min.
Embodiment 2
（1）Washing：With embodiment 1；
（2）Infiltration：With the AEO pretreatment of fiber of oven dry stock dosage 5%, water fibre ratio 18:1,30-60 DEG C, 40kHz sonication treatment times 20min；
（3）Mechanical dispersion：Fibre concentration is adjusted to 0.78 ‰, equipment is discongested with fiber and discongests fiber, in 2500r/min 10min is discongested under rotating speed；
（4）Dispersant：Add the polyethylene glycol oxide relative to oven dry stock dosage 0.10%（PEO）, 800r/min stirs Mix 1min.
Embodiment 3
（1）Washing：With embodiment 1；
（2）Infiltration：With the AEO pretreatment of fiber of oven dry stock dosage 5%, water fibre ratio 18:1,30-60 DEG C, 40kHz sonication treatment times 100min；
（3）Mechanical dispersion：Fibre concentration is adjusted to 0.78 ‰, equipment is discongested with fiber and discongests fiber, in 2500r/min 25min is discongested under rotating speed；
（4）Dispersant：Add the polyethylene glycol oxide of oven dry stock dosage 0.14%（PEO）, 800r/min stirrings 1min
Embodiment 4
（1）Washing：With embodiment 1；
（2）Infiltration：With the AEO pretreatment of fiber of oven dry stock dosage 10%, water fibre ratio 18:1,30-60 DEG C, 40kHz sonication treatment times 2min；
（3）Mechanical dispersion：Fibre concentration is adjusted to 0.78 ‰, equipment is discongested with fiber and discongests fiber, in 2500r/min 10min is discongested under rotating speed；
（4）Dispersant：Add the polyethylene glycol oxide of oven dry stock dosage 0.14%（PEO）, 800r/min stirrings 1min.
Embodiment 5
（1）Washing：With embodiment 1；
（2）Infiltration：With the AEO pretreatment of fiber of oven dry stock dosage 10%, water fibre ratio 18:1,30-60 DEG C, 40kHz sonication treatment times 20min；
（3）Mechanical dispersion：Fibre concentration is adjusted to 0.78 ‰, equipment is discongested with fiber and discongests fiber, in 2500r/min 25min is discongested under rotating speed；
（4）Dispersant：Add the polyethylene glycol oxide of oven dry stock dosage 0.06%（PEO）, 800r/min stirrings 1min.
Embodiment 6
（1）Washing：With embodiment 1；
（2）Infiltration：With the AEO pretreatment of fiber of oven dry stock dosage 10%, water fibre ratio 18:1,30-60 DEG C, 40kHz sonication treatment times 100min；
（3）Mechanical dispersion：Fibre concentration is adjusted to 0.78 ‰, equipment is discongested with fiber and discongests fiber, in 2500r/min 5min is discongested under rotating speed；
（4）Dispersant：Add the polyethylene glycol oxide of oven dry stock dosage 0.10%（PEO）, 800r/min stirrings 1min.
Embodiment 7
（1）Washing：With embodiment 1；
（2）Infiltration：With the AEO pretreatment of fiber of oven dry stock dosage 15%, water fibre ratio 18:1,30-60 DEG C, 40kHz sonication treatment times 2min；
（3）Mechanical dispersion：Fibre concentration is adjusted to 0.78 ‰, equipment is discongested with fiber and discongests fiber, in 2500r/min 25min is discongested under rotating speed；
（4）Dispersant：Add the polyethylene glycol oxide of oven dry stock dosage 0.10%（PEO）, 800r/min stirrings 1min.
Embodiment 8
（1）Washing：With embodiment 1；
（2）Infiltration：With the AEO pretreatment of fiber of oven dry stock dosage 15%, water fibre ratio 18:1,30-60 DEG C, 40kHz sonication treatment times 20min；
（3）Mechanical dispersion：Fibre concentration is adjusted to 0.78 ‰, equipment is discongested with fiber and discongests fiber, in 2500r/min 5min is discongested under rotating speed；
（4）Dispersant：Add the polyethylene glycol oxide of oven dry stock dosage 0.14%（PEO）, 800r/min stirrings 1min.
Embodiment 9
（1）Washing：With embodiment 1；
（2）Infiltration：With the AEO pretreatment of fiber of oven dry stock dosage 15%, water fibre ratio 18:1,30-60 DEG C, 40kHz sonication treatment times 100min；
（3）Mechanical dispersion：Fibre concentration is adjusted to 0.78 ‰, equipment is discongested with fiber and discongests fiber, in 2500r/min 10min is discongested under rotating speed；
（4）Dispersant：Add the polyethylene glycol oxide of oven dry stock dosage 0.06%（PEO）, 800r/min stirrings 1min.
The tensile index of paper prepared by the different pretreatments technique of table 1
Factor AEO dosage/% Pretreatment time/min Discongest the time/min Polyethylene glycol oxide dosage/% Tensile index/Nmg-1
Experiment 1 5 2 5 0.06 51.7
Experiment 2 5 20 10 0.10 55.2
Experiment 3 5 100 25 0.14 53.4
Experiment 4 10 2 10 0.14 55.1
Experiment 5 10 20 25 0.06 60.6
Experiment 6 10 100 5 0.10 68.3
Experiment 7 15 2 25 0.10 47.7
Experiment 8 15 20 5 0.14 67.2
Experiment 9 15 100 10 0.06 71.80
A kind of pretreatment process for dispersing of 9 superhigh molecular weight polyethylene fibers of embodiment, step are：
（1）Washing：Superhigh molecular weight polyethylene fibers are taken, use concentration as 5.0 × l0-3Mol/L acetone solvents enter to it Row washing, removes fiber surface impurity；
（2）Infiltration：Take step（1）Gained superhigh molecular weight polyethylene fibers, add and permeate according to the 20% of oven dry stock dosage Agent aerosol-OT salt and AEO, it is fine than being 100 according to water:1 adds water, is then in temperature 30-60 DEG C, handle 48h under 20kHz ultrasound conditions, obtain fibrous suspension；
（3）Mechanical dispersion：Take step（2）Gained fibrous suspension, fibre concentration is adjusted to 2.5 ‰, discongested with fiber Equipment discongests fiber, and 15min is discongested under 1500r/min rotating speeds；
（4）Dispersant：In step（3）Gained discongests 1.5% added in rear mixed liquor relative to oven dry stock dosage Dispersant, 100r/min speed carry out scattered 3min to mixed liquor.
A kind of pretreatment process for dispersing of 10 superhigh molecular weight polyethylene fibers of embodiment, step are：
（1）Washing：Superhigh molecular weight polyethylene fibers are taken, use concentration as 3.0 × l0-3Mol/L solvent dodecyl sulphur Sour sodium washs to it, removes fiber surface impurity；
（2）Infiltration：Take step（1）Gained superhigh molecular weight polyethylene fibers, add and permeate according to the 20% of oven dry stock dosage Agent APES, it is fine than being 10 according to water:1 adds water, is then 30-60 DEG C, under 100kHz ultrasound conditions in temperature 2h is handled, obtains fibrous suspension；
（3）Mechanical dispersion：Take step（2）Gained fibrous suspension, fibre concentration is adjusted to 0.15 ‰, discongested with fiber Equipment discongests fiber, and 2min is discongested under 4000r/min rotating speeds；
（4）Dispersant：In step（3）Gained is discongested in rear mixed liquor and added relative to the 0.01% of oven dry stock dosage Dispersant Tween-80 and Tween-60,1200r/min speed carries out scattered 30smin to mixed liquor, produces super after processing High molecular weight polyethylene fiber.
A kind of pretreatment process for dispersing of 11 superhigh molecular weight polyethylene fibers of embodiment, step are：
（1）Washing：Superhigh molecular weight polyethylene fibers are taken, use concentration as 4.0 × l0-3Mol/L etoh solvents enter to it Row washing, removes fiber surface impurity；
（2）Infiltration：Take step（1）Gained superhigh molecular weight polyethylene fibers, add and permeate according to the 2% of oven dry stock dosage Agent APES, it is fine than being 70 according to water:1 adds water, is then 30-60 DEG C, locates under 80kHz ultrasound conditions in temperature 36h is managed, obtains fibrous suspension；
（3）Mechanical dispersion：Take step（2）Gained fibrous suspension, fibre concentration is adjusted to 2 ‰, is discongested and set with fiber It is standby to discongest fiber, discongest 9min under 3000r/min rotating speeds；
（4）Dispersant：In step（3）Gained discongests 1.2% added in rear mixed liquor relative to oven dry stock dosage Dispersant octadecylamine, 300r/min speed carry out scattered 2min to mixed liquor, produce the superhigh molecular weight polyethylene after processing Alkene fiber.

Claims (1)

  1. A kind of 1. pretreatment process for dispersing of superhigh molecular weight polyethylene fibers, it is characterized in that step is：
    （1）Washing：Superhigh molecular weight polyethylene fibers are taken, use concentration as 0.1 × l0-3-5.0×l0-3Mol/L solvents enter to it Row washing, removes fiber surface impurity；
    （2）Infiltration：Take step（1）Gained superhigh molecular weight polyethylene fibers, infiltration is added according to the 2%-20% of oven dry stock dosage Agent, it is 100-10 according to the fine ratio of water:1 adds water, is then 30-60 DEG C, handles 2min- under 20-100kHz ultrasound conditions in temperature 48h, obtain fibrous suspension；
    （3）Mechanical dispersion：Take step（2）Gained fibrous suspension, fibre concentration is adjusted to 0.15 ‰ -2.5 ‰, dredged with fiber Solution equipment discongests fiber, and 2-15min is discongested under 1500-4000r/min rotating speeds；
    （4）Dispersant：In step（3）Gained discongests the 0.01%-1.5% added in rear mixed liquor relative to oven dry stock dosage Dispersant, 100-1200r/min speed carries out scattered 30s-3min to mixed liquor, produces the superhigh molecular weight polyethylene after processing Alkene fiber；
    Step（1）The solvent is neopelex, lauryl sodium sulfate, acetone or alcohol；
    Step（2）The bleeding agent is fatty alcohol polyoxyalkyl ether, AEO, aerosol-OT salt Or the one or more in APES；
    Step（4）The dispersant is polyethylene glycol oxide, AEO methyl-monosilane, oleic acid polyoxyethylene fat, carboxylic Sodium carboxymethylcellulose pyce, alkyl diphenyl ether sodium sulfonate, APES phosphate ester salt, octadecylamine, methylcellulose, One or more in Tween-80, Tween-60, sodium pyrophosphate, hexamethyl sodium phosphate.
CN201610920332.0A 2016-10-21 2016-10-21 A kind of pretreatment process for dispersing of superhigh molecular weight polyethylene fibers Active CN106498791B (en)

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