CN104631199B - A kind of aramid paper adding potassium titanate crystal whisker and preparation method thereof - Google Patents
A kind of aramid paper adding potassium titanate crystal whisker and preparation method thereof Download PDFInfo
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- CN104631199B CN104631199B CN201510044190.1A CN201510044190A CN104631199B CN 104631199 B CN104631199 B CN 104631199B CN 201510044190 A CN201510044190 A CN 201510044190A CN 104631199 B CN104631199 B CN 104631199B
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- 239000013078 crystal Substances 0.000 title claims abstract description 96
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 239000004760 aramid Substances 0.000 title claims abstract description 84
- 229920003235 aromatic polyamide Polymers 0.000 title claims abstract description 84
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000000725 suspension Substances 0.000 claims abstract description 161
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 159
- 239000006185 dispersion Substances 0.000 claims abstract description 54
- 239000000835 fiber Substances 0.000 claims abstract description 50
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- 239000003795 chemical substances by application Substances 0.000 claims description 7
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 239000011591 potassium Substances 0.000 claims description 4
- 125000002091 cationic group Chemical group 0.000 claims description 2
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- 230000003064 anti-oxidating effect Effects 0.000 description 1
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Abstract
The invention discloses a kind of aramid paper adding potassium titanate crystal whisker and preparation method thereof, the potassium titanate crystal whisker less expensive by adding excellent performance, price, potassium titanate crystal whisker and aramid fiber is discongested dispersion are made uniform suspension through being mixed, oblique net paper machine is manufactured paper with pulp shaping, squeezing, dry and on hot press, carry out hot pressing further obtain aramid paper.Aramid paper production cost can be significantly reduced, improve resistance to elevated temperatures and the wearability of aramid paper mechanical property especially aramid paper simultaneously；Additionally, potassium titanate crystal whisker and aramid fiber mix use, produce " fibrous crystal palpus " small cladding structure, played collaborative, the confounding effect of fiber, improved into the combination property of paper, improved paper machine speed and production efficiency.Method provided by the invention is compared with conventional aramid paper produces at present, and technique is simple, preparation cost is cheap, excellent performance.
Description
Technical field
The invention belongs to material and field of papermaking, be specifically related to a kind of aramid paper adding potassium titanate crystal whisker and preparation method thereof.
Background technology
Aramid fiber is a kind of composite fibre materials with many merits such as high intensity, high-modulus, high temperature resistant, little, the good stability of the dimensions of low-density, heat-shrinkable, has the good reputation of " synthetic steel wire ".The aramid paper being prepared from by papermaking wet therapy forming process by aramid fiber, there is light specific gravity, specific strength is big, specific stiffness is high, shock resistance, prominent corrosion-resistant and self-extinguishment, the features such as good high-temperature stability and saturating Electromagnetic performance, the composite material base as a kind of advanced person is widely used in the fields such as high temperature insulating material, Aero-Space and high-performance electronic equipment.
Fast development along with field of compound material, it have also been obtained further expansion at civil areas such as physical culture, house ornamentation, household electrical appliances, this just requires that composite material base realizes cost degradation under the premise of high performance requirement towards meeting, namely the various aspects such as raw material, combination process and quality control realize cost degradation, so could realize the application " by switching from manufacturing military products to goods for civilian use " of advanced composite material, widen composite large-scale application in the product for civilian use further.Current China aramid fiber produces and tentatively achieves industrialization, such as calm and peaceful new material limited company and Sheng Ou aramid fiber company limited etc., but annual production is still limited, aramid fiber is applied in field, middle and high end more, and abroad import aramid fiber price still can be in any more, this just brings bigger cost burden to the application of follow-up civil use industry chain and limits the popularization of its application.
Research about aramid paper substantially all concentrates on the preparation method of aramid paper and how to improve the aspect of performance of aramid paper.Method for example with multiple proportional layered compound prepares aramid paper thus improving Z-direction distribution (application number: 200710017244.0) of paper sheet formation evenness and fiber；Interfibrous adhesion (application number: 200610022082.5) is improved by adding the third fiber that coheres with obvious melt temperature；Add functional powder at ppta-pulp fibre preparatory phase and improve page characteristic such as intensity, antistatic effect, antioxidation or aging etc. (application number: 201110032074.X)；Possess different temperature by adjusting two nips in hot pressing, prepare the different aramid paper of smoothness for two sides (application number: 200910216912.1)；Add specific surface area fibrid bigger, that surface activity is higher and improve the short-and-medium interface binding power cut between fiber and pulp fibers of aramid fiber page, improve interface bond strength (application number: 201110406330.7).But, above-mentioned listed patent and other same domain patents are all concentrate on to improve the page characteristic such as aspect such as mechanical strength and paper-making process, and research not relevant at present in how reducing aramid paper production cost under the premise ensureing aramid paper performance, improving page wearability, heat-resisting quantity etc..
Potassium titanate crystal whisker was developed in 1958 by du pont company initially as space flight high temperature insulating material, had excellent mechanical property, stable chemical property, excellent corrosion resistance, heat-resisting thermal insulation, wearability, high electric insulating quality.As can be seen from Table 1, the intensity of potassium titanate crystal whisker is far beyond conventional glass fibre, carbon fiber, Kafra fiber etc..Compared with some Advanced Reinforcing Fibers, its performance is slightly inferior, but price is only their 1/10～1/100.
Table 1 potassium titanate crystal whisker and other fibre properties and price comparison
Summary of the invention
For the defect overcoming above-mentioned prior art to exist, it is an object of the invention to provide a kind of aramid paper adding potassium titanate crystal whisker and preparation method thereof, the present invention manufactures paper with pulp by coordinating after adding, in aramid fiber, the potassium titanate crystal whisker that excellent performance, price are less expensive, production cost can be reduced, improve resistance to elevated temperatures and the wearability of aramid paper mechanical property especially aramid paper simultaneously；Additionally, potassium titanate crystal whisker and aramid fiber mix use, serve collaborative, the confounding effect of fiber, improve into the combination property of paper, improve paper machine speed and production efficiency.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that
A kind of aramid paper adding potassium titanate crystal whisker, in parts by weight, described aramid paper constitutes component and includes: aramid fiber: 76～95 parts；Potassium titanate crystal whisker: 5～24 parts, described aramid fiber is aramid fiber X and the mixed system of aramid fiber Y, wherein, the weight ratio of aramid fiber X and aramid fiber Y is (3～5) (5～7), and described aramid fiber X is the one in meta-aramid chopped strand, p-aramid fiber chopped strand；Described aramid fiber Y is that one or more in p-aramid fiber fibrid, PPTA-pulp fiber, meta-aramid fibre fibrid also include retention agent, and the addition of described retention agent is the 0.02～0.1% of aramid fiber Y weight.
Further, described potassium titanate crystal whisker is one or both mixture of potassium hexatitanate or eight potassium titanates, the performance of potassium titanate crystal whisker is as follows: the pH of its aqueous dispersion liquid is 7～9, diameter of whiskers is 0.8～1.5 μm, whisker length is 30～100 μm, whisker length-width ratio is 20～125, and whisker fusing point is 1300～1370 DEG C.
Further, described retention agent is PAMC.
The preparation method of a kind of aramid paper adding potassium titanate crystal whisker, comprises the following steps:
Step 1: by aramid fiber X, namely any one in meta-aramid chopped strand and p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely p-aramid fiber fibrid, PPTA-pulp fiber, one or more fibers in meta-aramid fibre fibrid process and discongest dispersion through fibrillation and prepare pulp suspension (B)；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, then adds PAMC in this mixture, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared is discongested dispersion after mixing prepare pulp suspension (D) with through step 2,3 pulp suspensions (C) prepared；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Further, in the mixture that in step 3, potassium titanate crystal whisker and pulp suspension (B) are mixed to get, the mass concentration of potassium titanate crystal whisker is 0.5～8%.
Further, the addition of step 3 cationic polyacrylamide is in pulp suspension (B) the 0.02～0.1% of fiber oven dry weight.
Further, when the mixture being mixed to get to potassium titanate crystal whisker and pulp suspension (B) in step 3 adds PAMC, agitator stirring is utilized to make different component be sufficiently mixed and dispersed, mixing time is 5～60min, mixing speed controls at 200～2500rpm, prepares pulp suspension (C).
Further, in step 4, pulp suspension (D) includes the aramid fiber of 76～95 weight portions and the potassium titanate crystal whisker of 5～24 weight portions, described aramid fiber is aramid fiber X and the mixed system of aramid fiber Y, wherein, the weight ratio of aramid fiber X and aramid fiber Y is (3～5) (5～7).
Further, the preparation method of a kind of aramid paper adding potassium titanate crystal whisker, comprise the following steps:
Step 1: by aramid fiber X, namely p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely p-aramid fiber fibrid processes and discongests dispersion through fibrillation and prepares pulp suspension (B)；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 1%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.03% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 10min, mixing speed controls at 400rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 90 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 37, potassium titanate crystal whisker is 10 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Further, the preparation method of a kind of aramid paper adding potassium titanate crystal whisker, comprise the following steps:
Step 1: by aramid fiber X, namely p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely p-aramid fiber fibrid, PPTA-pulp fiber and meta-aramid fibre fibrid process and discongest dispersion through fibrillation and prepare pulp suspension (B)；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 5.5%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.04% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 45min, mixing speed controls at 1000rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 79 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 46, potassium titanate crystal whisker is 21 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Compared with prior art, the present invention has following useful technique effect:
The potassium titanate crystal whisker that the present invention adopts has the characteristics such as excellent mechanical property, stable chemical property, excellent corrosion resistance, heat-resisting thermal insulation, wearability, high electric insulating quality, the aramid paper of preparation has the strength character of excellence, especially temperature tolerance and wearability, the features such as production technology is simple, with low cost.The present invention utilizes potassium titanate crystal whisker Substitute For Partial aramid fiber, saves fibrous raw material, reduces cost.
nullMix in dispersive process with aramid fiber at potassium titanate crystal whisker，By adding CPAM (PAMC) as retention agent，Control suitable mixing speed and mixing time，Potassium titanate crystal whisker and PPTA-pulp fiber can be made、One or more in p-aramid fiber fibrid and meta-aramid fibre fibrid produce " fibrous crystal palpus " small cladding structure，Improve potassium titanate crystal whisker retention in aramid paper，Make aramid paper system produces between different component higher combination simultaneously，Potassium titanate crystal whisker is utilized to have high intensity、High length-diameter ratio and special " needle-like " fiber microscopic pattern，Can better with the aramid fiber of different shape such as chopped、Pulp or fibrid produce fiber and work in coordination with、Confounding effect，Improve the fiber interface adhesion of diverse microcosmic form further，Improve the combination property of aramid paper.
The present invention adopts new technology, new method development & production goes out the aramid paper of excellent performance, lower cost; strong innovation; have a extensive future; to promoting Hi-tech Industry Development; promote the upgrading of conventional industries, it is achieved the application " by switching from manufacturing military products to goods for civilian use " of advanced composite material, widen composite scale application in the product for civilian use such as physical culture, house ornamentation, household electrical appliances further; improving product class, promote related industry, industry development there is certain realistic meaning.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the present invention；
Fig. 2 is that potassium titanate crystal whisker schemes (a: × 15000 with ppta-pulp fibre surface produces " fibrous crystal palpus " small cladding structure SEM；b:×50000)；
Fig. 3 is that potassium titanate crystal whisker schemes (× 50000) with aramid fiber fibrid surface produces " fibrous crystal palpus " small cladding structure SEM；
Fig. 4 is the TGA comparison diagram of aramid paper contrast sample (aramid fiber: 90 parts, potassium titanate crystal whisker: 10 parts) adding potassium titanate crystal whisker and blank sample.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the present invention are described in further detail:
Referring to Fig. 1, the preparation method of a kind of aramid paper adding potassium titanate crystal whisker, comprise the following steps:
Step 1: by aramid fiber X, namely any one in meta-aramid chopped strand and p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely p-aramid fiber fibrid, PPTA-pulp fiber, one or more fibers in meta-aramid fibre fibrid process and discongest dispersion through fibrillation and prepare pulp suspension (B)；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 0.5～8%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.02～0.1% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 5～60min, mixing speed controls at 200～2500rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 76～95 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is (3～5) (5～7), potassium titanate crystal whisker is 5～24 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Below in conjunction with embodiment, the present invention is described in further detail:
Blank Example
Step 1: by aramid fiber X, namely any one in meta-aramid chopped strand and p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely p-aramid fiber fibrid, PPTA-pulp fiber, one or more fibers in meta-aramid fibre fibrid process and discongest dispersion through fibrillation and prepare pulp suspension (B)；
Step 3: add PAMC in this pulp suspension (B), addition is in pulp suspension (B) the 0.02～0.1% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 5～60min, mixing speed controls at 200～2500rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 76～95 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is (3～5) (5～7), discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Embodiment 1
Step 1: by aramid fiber X, namely meta-aramid chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely meta-aramid fibre fibrid processes and discongests dispersion through fibrillation and prepares pulp suspension (B)；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 1%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.02% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 9min, mixing speed controls at 300rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 95 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 35, potassium titanate crystal whisker is 6 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Embodiment 2
Step 1: by aramid fiber X, namely p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely PPTA-pulp fiber processes and discongests dispersion through fibrillation and prepares pulp suspension (B)；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 1%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.03% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 10min, mixing speed controls at 400rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 90 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 37, potassium titanate crystal whisker is 10 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Embodiment 3
Step 1: by aramid fiber X, namely p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely p-aramid fiber fibrid processes and discongests dispersion through fibrillation and prepares pulp suspension (B)；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 2%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.03% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 20min, mixing speed controls at 700rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 88 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 55, potassium titanate crystal whisker is 12 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Embodiment 4
Step 1: by aramid fiber X, namely p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely processes and discongests the prepared pulp suspension (B) of dispersion through fibrillation after p-aramid fiber fibrid and PPTA-pulp fiber mixing；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 3.5%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.04% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 28min, mixing speed controls at 600rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 83 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 57, potassium titanate crystal whisker is 17 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Embodiment 5
Step 1: by aramid fiber X, namely p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely processes and discongests dispersion through fibrillation after p-aramid fiber fibrid, PPTA-pulp fiber and meta-aramid fibre fibrid mixing and prepare pulp suspension (B)；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 6.0%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.03% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 30min, mixing speed controls at 900rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 86 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 45, potassium titanate crystal whisker is 14 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Embodiment 6
Step 1: by aramid fiber X, namely meta-aramid chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely processes and discongests the prepared pulp suspension (B) of dispersion through fibrillation after p-aramid fiber fibrid and meta-aramid fibre fibrid mixing；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 4.0%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.05% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 37min, mixing speed controls at 750rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 89 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 47, potassium titanate crystal whisker is 11 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Embodiment 7
Step 1: by aramid fiber X, namely p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely processes and discongests dispersion through fibrillation after p-aramid fiber fibrid, PPTA-pulp fiber and meta-aramid fibre fibrid mixing and prepare pulp suspension (B)；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 5.5%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.04% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 45min, mixing speed controls at 1000rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 79 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 46, potassium titanate crystal whisker is 21 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Embodiment 8
Step 1: by aramid fiber X, namely meta-aramid chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely processes and discongests the prepared pulp suspension (B) of dispersion through fibrillation after p-aramid fiber fibrid and PPTA-pulp fiber mixing；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 0.5%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.02% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 5min, mixing speed controls at 200rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 76 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 56, potassium titanate crystal whisker is 5 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
Embodiment 9
Step 1: by aramid fiber X, namely p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely processes and discongests the prepared pulp suspension (B) of dispersion through fibrillation after PPTA-pulp fiber and meta-aramid fibre fibrid mixing；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 8%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.1% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 60min, mixing speed controls at 2500rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 95 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 36, potassium titanate crystal whisker is 24 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
The aramid paper sampling Detection that embodiment 2 is prepared by the inventive method at laboratory, its part index number is respectively as follows: 1, quantitatively: 45.1m2/g；2, tensile strength: 32.6N/cm；3, tearing strength: 1079mN；5、TG10%: 550.0 DEG C；To blank Example sampling Detection, its part index number is respectively as follows: 1, quantitatively: 45.0m2/g；2, tensile strength: 27.6N/cm；3, tearing strength: 853mN；5、TG10%: 539.0 DEG C；, the present invention aramid paper for preparing improves the intensity of aramid paper and heat resistance simultaneously because potassium titanate crystal whisker instead of part aramid fiber relative to pattern prepared by blank Example, produces cost improving the one-tenth reducing aramid paper on the basis of aramid paper performance.
Claims (6)
1. the aramid paper adding potassium titanate crystal whisker, it is characterised in that in parts by weight, described aramid paper constitutes component and includes: aramid fiber: 76～95 parts；Potassium titanate crystal whisker: 5～24 parts, described aramid fiber is aramid fiber X and the mixed system of aramid fiber Y, wherein, the weight ratio of aramid fiber X and aramid fiber Y is (3～5) (5～7), and described aramid fiber X is the one in meta-aramid chopped strand, p-aramid fiber chopped strand；Described aramid fiber Y is one or more in p-aramid fiber fibrid, PPTA-pulp fiber, meta-aramid fibre fibrid, also includes retention agent, and the addition of described retention agent is the 0.02～0.1% of aramid fiber Y weight；
Described potassium titanate crystal whisker is one or both mixture of potassium hexatitanate or eight potassium titanates, the performance of potassium titanate crystal whisker is as follows: the pH of its aqueous dispersion liquid is 7～9, diameter of whiskers is 0.8～1.5 μm, whisker length is 30～100 μm, whisker length-width ratio is 20～125, and whisker fusing point is 1300～1370 DEG C；
Described retention agent is PAMC.
2. the preparation method of the aramid paper adding potassium titanate crystal whisker, it is characterised in that comprise the following steps:
Step 1: by aramid fiber X, namely any one in meta-aramid chopped strand and p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely p-aramid fiber fibrid, PPTA-pulp fiber, one or more fibers in meta-aramid fibre fibrid process and discongest dispersion through fibrillation and prepare pulp suspension (B)；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 0.5～8%, then in this mixture, add PAMC, prepare pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared is discongested dispersion after mixing prepare pulp suspension (D) with through step 2,3 pulp suspensions (C) prepared, pulp suspension (D) includes the aramid fiber of 76～95 weight portions and the potassium titanate crystal whisker of 5～24 weight portions, described aramid fiber is aramid fiber X and the mixed system of aramid fiber Y, wherein, the weight ratio of aramid fiber X and aramid fiber Y is (3～5) (5～7)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
3. the preparation method of a kind of aramid paper adding potassium titanate crystal whisker according to claim 2, it is characterised in that the addition of step 3 cationic polyacrylamide is in pulp suspension (B) the 0.02～0.1% of fiber oven dry weight.
4. the preparation method of a kind of aramid paper adding potassium titanate crystal whisker according to claim 2, it is characterized in that, when the mixture being mixed to get to potassium titanate crystal whisker and pulp suspension (B) in step 3 adds PAMC, agitator stirring is utilized to make different component be sufficiently mixed and dispersed, mixing time is 5～60min, mixing speed controls at 200～2500rpm, prepares pulp suspension (C).
5. the preparation method of a kind of aramid paper adding potassium titanate crystal whisker according to claim 2, it is characterised in that comprise the following steps:
Step 1: by aramid fiber X, namely p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely p-aramid fiber fibrid processes and discongests dispersion through fibrillation and prepares pulp suspension (B)；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 1%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.03% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 10min, mixing speed controls at 400rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 90 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 37, potassium titanate crystal whisker is 10 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
6. the preparation method of a kind of aramid paper adding potassium titanate crystal whisker according to claim 2, it is characterised in that comprise the following steps:
Step 1: by aramid fiber X, namely p-aramid fiber chopped strand prepares pulp suspension (A) through discongesting dispersion；
Step 2: by aramid fiber Y, namely p-aramid fiber fibrid, PPTA-pulp fiber and meta-aramid fibre fibrid process and discongest dispersion through fibrillation and prepare pulp suspension (B)；
Step 3: the pulp suspension (B) that potassium titanate crystal whisker and step 2 prepare is mixed to get mixture, wherein the mass concentration of potassium titanate crystal whisker is 5.5%, then in this mixture, add PAMC, addition is in pulp suspension (B) the 0.04% of fiber oven dry weight, add and the process of PAMC utilizes agitator stirring make different component be sufficiently mixed and dispersed, mixing time is 45min, mixing speed controls at 1000rpm, prepares pulp suspension (C)；
Step 4: the pulp suspension (A) step 1 prepared mixes with through step 2,3 pulp suspensions (C) prepared, controlling aramid fiber component is 79 weight portions, wherein, the weight ratio of aramid fiber X and aramid fiber Y is 46, potassium titanate crystal whisker is 21 weight portions, discongests dispersion and prepares pulp suspension (D)；
Step 5: manufactured paper with pulp on oblique net paper machine shapings by the pulp suspension (D) that step 4 prepares, squeezing, dries and carries out hot pressing further on hot press and obtain aramid paper.
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| CN106245411B (en) * | 2016-08-30 | 2018-02-02 | 烟台民士达特种纸业股份有限公司 | A kind of production method of meta-aramid fibers paper base material |
| CN106283836B (en) * | 2016-08-30 | 2018-03-09 | 烟台民士达特种纸业股份有限公司 | A kind of preparation method of high density aramid fiber insulation hardboard |
| CN107663807A (en) * | 2017-11-22 | 2018-02-06 | 西南大学 | A kind of method for lifting aramid insulating paper mechanical performance and hydrophobic oleophobic performance |
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| CN102212223A (en) * | 2011-04-27 | 2011-10-12 | 华东理工大学 | Manufacture method for composite environmentally-friendly paper |
| CN103582731A (en) * | 2011-04-07 | 2014-02-12 | 杜邦帝人先进纸（日本）有限公司 | Conductive aramid paper and method for producing same |
| CN103572640A (en) * | 2013-10-24 | 2014-02-12 | 陕西科技大学 | Method for preparing para aramid paper from para aramid fibrid |
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| CN103582731A (en) * | 2011-04-07 | 2014-02-12 | 杜邦帝人先进纸（日本）有限公司 | Conductive aramid paper and method for producing same |
| CN102212223A (en) * | 2011-04-27 | 2011-10-12 | 华东理工大学 | Manufacture method for composite environmentally-friendly paper |
| CN103572640A (en) * | 2013-10-24 | 2014-02-12 | 陕西科技大学 | Method for preparing para aramid paper from para aramid fibrid |
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