CN115852743A - High-compressibility and flame-retardant carbon fiber oil absorbent felt and preparation method thereof - Google Patents

High-compressibility and flame-retardant carbon fiber oil absorbent felt and preparation method thereof Download PDF

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CN115852743A
CN115852743A CN202211528808.8A CN202211528808A CN115852743A CN 115852743 A CN115852743 A CN 115852743A CN 202211528808 A CN202211528808 A CN 202211528808A CN 115852743 A CN115852743 A CN 115852743A
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China
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carbon fiber
felt
polyphenylene sulfide
oil absorbent
compressibility
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CN202211528808.8A
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殷先泽
李钰山
晏松
王罗新
王桦
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Wuhan Textile University
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Wuhan Textile University
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Abstract

The invention relates to a high compressibility and flame retardant carbon fiber oil absorbent felt and a preparation method thereof. The welding point of the oil absorbent felt obtained by the preparation method of the invention hinders the interface slippage under the external load, so that the absorbent has strong cyclic compressibility. The absorbent exhibits exceptional hydrophobicity and excellent fire resistance without further hydrophobic modification or the addition of any flame retardant. Meanwhile, the continuous conductive network enables the absorbent to have very high photo-thermal and joule heating effects, thereby improving the adsorption efficiency of the crude oil through the self-heating function. The preparation method is simple and environment-friendly, does not use any organic solvent, and is expected to provide a good solution for all-weather cleaning of crude oil leakage in severe environment.

Description

High-compressibility and flame-retardant carbon fiber oil absorbent felt and preparation method thereof
Technical Field
The invention relates to the field of preparation methods of functional polymer materials, in particular to a high-compressibility and flame-retardant carbon fiber oil-absorbing felt and a preparation method thereof.
Background
The frequent occurrence of accidents of crude oil leakage during offshore oil exploration and transportation causes catastrophic damages to the ocean safety and ecological balance as well as human health. Currently, various techniques reported in the literature (such as dispersants, in situ combustion, biodegradation, absorption, and skimmers) have been used to treat crude oil leaks. Among them, the adsorption route of hydrophobic and lipophilic adsorbents is simple, green and free from secondary pollution, and is considered as the most promising adsorption strategy. However, the extremely high viscosity of the crude oil prevents them from diffusing into the interior of the absorbent, resulting in poor cleaning and recovery of the crude oil. Therefore, it remains very challenging to develop an advanced crude oil spill remediation absorbent. It is known that increasing the temperature of crude oil is an effective way to reduce the viscosity of crude oil, and from this point of view, it is necessary to design an absorbent with photothermal and/or joule heating functions. Under the condition of the photo-thermal conversion adsorbent, solar energy can be captured and then converted into heat to heat surrounding crude oil, and when the solar energy is weak or difficult to obtain, the Joule heating absorbent can be used as a supplement to convert electric energy into Joule heat to realize all-weather cleaning of crude oil leakage. In addition, crude oil is highly flammable. In the desorption and recovery process, the high temperature generated by photo-thermal heating or Joule heating easily causes the combustion of crude oil, and brings more serious pollution problem. Inspired by bird's nest, we propose a novel polymer welding strategy, utilize polyphenylene sulfide (PPS) welding carbon fiber to prepare a high compressibility and fire-resistant oil absorption felt, polyphenylene sulfide (PPS) is an ideal welding material, can make discontinuous carbon fiber material interconnect, form porous integral structure. The obtained oil absorption felt shows stable super-hydrophobic and lipophilic behaviors even under strong acid and strong alkali conditions without further treatment, and the mutually connected welding structure ensures that the oil absorption felt has strong compressibility and higher photo-thermal and Joule heating effects.
Disclosure of Invention
The invention aims to solve the technical problems and requirements and provides a high-compressibility and flame-retardant carbon fiber oil absorbent felt and a preparation method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
a preparation method of a high-compressibility and flame-retardant carbon fiber oil absorbent felt comprises the following steps:
step 1, polyphenylene sulfide non-woven fabric and carbon fiber are cleaned and dried;
step 2, pulping the polyphenylene sulfide non-woven fabric cleaned in the last step for 50-70min to obtain polyphenylene sulfide non-woven fabric fiber pulp;
and 3, mixing the carbon fiber cleaned in the step 1 with the polyphenylene sulfide non-woven fabric fiber pulp obtained in the step 2 according to the ratio of (4-6): (4-6), and treating the mixture by using a pulp disintegrator to obtain a mixture after dissociation treatment;
step 4, preparing aqueous dispersion liquid, transferring the dissociated mixture obtained in the step 3 into the dispersion liquid, and uniformly mixing;
and 5, filtering for multiple times by adopting a wet papermaking method to obtain the original felt.
And 6, drying and heating the original felt, and carbonizing to obtain the well-carbonized oil absorption felt.
Further, the step 1 specifically comprises: the polyphenylene sulfide non-woven fabric and the carbon fiber are respectively added into an acetone solution, residual stains and dust are removed by ultrasonic waves, and the mixture is dried in a vacuum furnace at the temperature of 80 ℃.
Further, in the step 3, the mass ratio of the polyphenylene sulfide nonwoven fabric to the carbon fiber is 4.
Further, the aqueous dispersion in the step 4 comprises polyethylene oxide and anionic polyacrylamide in a mass ratio of 6.
Further, the step 6 specifically includes the following steps: drying the original felt at 120 ℃, then forming at 300 ℃, finally heating to 800 ℃ in a tube furnace at the speed of 10 ℃/s, keeping at the temperature for 2 hours, and then continuously cooling to room temperature at the speed of 10 ℃/s to obtain the carbonized oil absorption felt.
Further, the length of the carbon fiber is chopped fiber with any size.
Further, in the step 4, stirring is performed until the polyethylene oxide is not agglomerated, and the stirring time is 3 to 8 hours.
The carbon fiber oil absorbent felt with high compressibility and flame retardance is prepared by the method.
After the technical scheme is adopted, compared with the prior art, the invention has the following advantages:
the invention adopts a wet papermaking method, provides a polymer 'welding' strategy, designs a multifunctional absorbent, and connects discontinuous carbon fibers together to form a three-dimensional welding structure by adopting polyphenylene sulfide (PPS) as an adhesive, and tests show that the oil absorption felt has good resilience and excellent oil absorption capacity only when the mass ratio of the mixture of the polyphenylene sulfide (PPS) and the carbon fibers is 5.
Due to the Presence of Polyphenylene Sulfide (PPS) and carbon fibers, the oil absorbent felt has ultra-light, super-hydrophobic, compressible and flame retardant properties without any treatment, and better photo-thermal and Joule heating effects. These excellent properties will allow the oil felt of the present invention to be used on a large scale for safely and effectively cleaning and recovering crude oil spills in harsh environments.
Compared with the traditional method, the method has the following advantages: 1) The preparation process is simple and can be prepared on a large scale; 2) The product has the advantages of super-light, super-hydrophobic, compressible and flame retardant properties, and better photo-thermal and Joule heating effects without any treatment; 3) The composite material can be used in severe environment, and both polyphenylene sulfide (PPS) and carbon fiber have good corrosion resistance. Therefore, the oil absorbent felt prepared by the method can be applied to the efficient cleaning and recovery of crude oil leakage in severe environment in a large scale.
The present invention will be described in detail below with reference to the drawings and examples.
Drawings
FIG. 1 is a flow chart of the preparation of the oil absorbent felt of the present invention;
FIG. 2 is a diagram of super-hydrophobic and oleophilic contact angle and substance of the oil absorbent felt of the present invention;
FIG. 3 is a graph of the temperature of the oil absorbent felt of the present invention under different illumination intensities along with time;
FIG. 4 is the maximum oil absorption capacity and speed of the oil absorbent felt of the present invention at different voltages for crude oil;
fig. 5 is a schematic view of the flame retardancy of the oil absorbent felt of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1
Respectively adding Carbon Fiber (CFS) and polyphenylene sulfide (PPS) superfine fiber nonwoven fabrics into an acetone solution, removing residual stains and dust by ultrasonic waves, and drying in a vacuum furnace at 80 ℃. Polyphenylene Sulfide (PPS) nonwoven fabric was beaten with a beater for 60min to produce polyphenylene sulfide fiber pulp. Polyphenylene sulfide fiber pulp was mixed with Carbon Fiber (CFS) at a mass ratio of 4. Preparing an aqueous dispersion, adding PEO: APAM = 6. After being uniformly mixed, the mixture is filtered for many times by adopting a wet papermaking method to obtain a wet original felt. Drying at 120 ℃, forming at 300 ℃, heating to 800 ℃ in a tube furnace at the speed of 10 ℃/s, keeping at the temperature for 2 hours, and continuously cooling to room temperature at the speed of 10 ℃/s to obtain the carbonized oil absorbent felt.
Example 2
Respectively adding Carbon Fiber (CFS) and polyphenylene sulfide (PPS) superfine fiber nonwoven fabrics into an acetone solution, removing residual stains and dust by ultrasonic waves, and drying in a vacuum furnace at 80 ℃. Polyphenylene Sulfide (PPS) nonwoven fabric was beaten with a beater for 60min to produce polyphenylene sulfide fiber pulp. Polyphenylene sulfide fiber pulp was mixed with Carbon Fiber (CFS) at a mass ratio of 5. Preparing an aqueous dispersion, wherein the mass ratio of PEO: APAM =6, solute of 1 as a dispersant, stirred for several hours, and then the resulting mixture was transferred to a dispersion. After being uniformly mixed, the mixture is filtered for many times by adopting a wet papermaking method to obtain a wet original felt. Drying at 120 ℃, forming at 300 ℃, heating to 800 ℃ in a tube furnace at the speed of 10 ℃/s, keeping at the temperature for 2 hours, and continuously cooling to room temperature at the speed of 10 ℃/s to obtain the carbonized oil absorbent felt.
Example 3
Respectively adding Carbon Fiber (CFS) and polyphenylene sulfide (PPS) superfine fiber nonwoven fabrics into an acetone solution, removing residual stains and dust by ultrasonic waves, and drying in a vacuum furnace at 80 ℃. Polyphenylene Sulfide (PPS) nonwoven fabric was beaten with a beater for 60min to produce polyphenylene sulfide fiber pulp. Polyphenylene sulfide fiber pulp was mixed with Carbon Fiber (CFS) in a mass ratio of 6. Preparing an aqueous dispersion, adding PEO: APAM =6, solute of 1 as a dispersant, stirred for several hours, and then the resulting mixture was transferred to a dispersion. After being uniformly mixed, the mixture is filtered for many times by adopting a wet papermaking method to obtain a wet original felt. Drying at 120 ℃, forming at 300 ℃, heating to 800 ℃ in a tube furnace at the speed of 10 ℃/s, keeping at the temperature for 2 hours, and continuously cooling to room temperature at the speed of 10 ℃/s to obtain the carbonized oil absorbent felt.
By three examples, it is shown that the polyphenylene sulfide fiber slurry is mixed with Carbon Fiber (CFS) at a mass ratio of 5. On the one hand, as the polyphenylene sulfide fiber pulp increases, excess polyphenylene sulfide (PPS) melts on the carbon fibers rather than at the junctions, which causes voids between the carbon fibers to be occupied, resulting in low oil adsorption capacity; on the other hand, if the amount of polyphenylene sulfide fiber pulp is insufficient, part of the carbon fibers cannot be connected together, which results in unstable structure. Therefore, the mixing of the polyphenylene sulfide fiber pulp with the Carbon Fiber (CFS) in a mass ratio of 5.
FIG. 1 shows a flow chart of the preparation of PPS @ CFS of the present invention. Cleaning and drying Carbon Fiber (CFS) and polyphenylene sulfide (PPS) superfine fiber non-woven fabric, and beating the polyphenylene sulfide (PPS) non-woven fabric into polyphenylene sulfide fiber pulp by using a beating machine. Polyphenylene sulfide fiber pulp and Carbon Fiber (CFS) are mixed according to a certain mass ratio and then are dissociated into separated fibers in a pulp dissociation machine. Preparing an aqueous dispersion, adding a certain mass ratio of PEO and APAM as a dispersing agent, stirring for several hours, and then transferring the obtained mixture into the dispersion. After being uniformly mixed, the mixture is filtered for many times by adopting a wet papermaking method to obtain a wet original felt. Drying at 120 deg.C, shaping at 300 deg.C, heating to 800 deg.C in a tube furnace, holding at the temperature for 2 hr, and cooling to room temperature to obtain carbonized oil absorbent felt.
As shown in FIG. 2, the Water Contact Angle (WCA) of PPS @ CFS reached 152 °, the oil contact angle was 0 °, and a significant mirror surface phenomenon was observed after immersing PPS @ CFS in water.
As shown in FIG. 3, the intensity of irradiation with the sun was from 1.0kW/m 2 Increased to 3.0kW/m 2 The surface equilibrium temperature of PPS @ CFS oil absorbent felt is gradually increased from 68 ℃ to 1After the lamp is turned off at 20 ℃, the PPS @ CFS oil absorbent felt is rapidly cooled to the room temperature.
As shown in figure 4, the maximum oil absorption capacity and the oil velocity of the crude oil reach 45gg respectively under the voltage of 5V -1 And 5.2mL cm -3 s -1
As shown in FIG. 5, the PPS @ CFS oil absorbent felt was unable to burn in normal atmosphere when placed directly on the alcohol burner flame, indicating its non-flammability.
The foregoing is illustrative of the best mode of the invention and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The scope of the present invention is defined by the appended claims, and any equivalent modifications based on the technical teaching of the present invention are also within the scope of the present invention.

Claims (8)

1. The preparation method of the high-compressibility and flame-retardant carbon fiber oil absorbent felt is characterized by comprising the following steps of:
step 1, polyphenylene sulfide non-woven fabric and carbon fiber are cleaned and dried;
step 2, pulping the polyphenylene sulfide non-woven fabric cleaned in the last step for 50-70min to obtain polyphenylene sulfide non-woven fabric fiber pulp;
and 3, mixing the carbon fibers cleaned in the step 1 with the polyphenylene sulfide non-woven fabric fiber pulp obtained in the step 2 according to the ratio of (4-6): (4-6), and treating the mixture by using a pulp disintegrator to obtain a mixture after dissociation treatment;
step 4, preparing aqueous dispersion liquid, transferring the dissociated mixture obtained in the step 3 into the dispersion liquid, and uniformly mixing;
and 5, filtering for multiple times by adopting a wet papermaking method to obtain the original felt.
And 6, drying and heating the original felt, and carbonizing to obtain the well-carbonized oil absorption felt.
2. The method for preparing the high compressibility and flame retardancy carbon fiber oil absorbent felt according to claim 1, wherein the step 1 is specifically: respectively adding the polyphenylene sulfide non-woven fabric and the carbon fiber into an acetone solution, removing residual stains and dust by using ultrasonic waves, and drying in a vacuum furnace at the temperature of 80 ℃.
3. The method for preparing the high compressibility and flame retardancy carbon fiber oil absorbent felt according to claim 1, wherein in the step 3, the mass ratio of the polyphenylene sulfide nonwoven fabric to the carbon fiber is 4.
4. The method for preparing the high compressibility and flame retardancy carbon fiber oil absorbent felt according to claim 3, wherein the aqueous dispersion in the step 4 comprises polyethylene oxide and anionic polyacrylamide in a mass ratio of 6.
5. The method for preparing the high compressibility and flame retardancy carbon fiber oil absorbent felt according to claim 3, wherein the step 6 specifically comprises the following steps: drying the original felt at 120 ℃, then forming at 300 ℃, finally heating to 800 ℃ in a tube furnace at the speed of 10 ℃/s, keeping at the temperature for 2 hours, and then continuously cooling to room temperature at the speed of 10 ℃/s to obtain the carbonized oil absorption felt.
6. The method for preparing a high compressibility and flame retardancy carbon fiber oil absorbent felt according to claim 3, wherein the length of the carbon fiber is chopped fiber of any size.
7. The method for preparing a high compressibility and flame retardancy carbon fiber oil absorbent felt according to claim 3, wherein in the step 4, the stirring is performed until the polyethylene oxide is not agglomerated, and the stirring time is 3 to 8 hours.
8. Highly compressible and flame retardant carbon fiber oil felt, characterized in that it is prepared by the process according to any one of claims 1 to 7.
CN202211528808.8A 2022-11-30 2022-11-30 High-compressibility and flame-retardant carbon fiber oil absorbent felt and preparation method thereof Pending CN115852743A (en)

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CN113527885A (en) * 2021-07-30 2021-10-22 中国科学院苏州纳米技术与纳米仿生研究所南昌研究院 Carbon fiber/polyphenylene sulfide composite material and preparation method and application thereof
CN114808538A (en) * 2022-05-12 2022-07-29 江西龙泰新材料股份有限公司 High-flame-retardant aramid composite paper and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003277529A (en) * 2002-03-22 2003-10-02 Toho Tenax Co Ltd Carbon fiber reinforced resin sheet and its production method
CN101148841A (en) * 2006-09-18 2008-03-26 四川得阳化学有限公司 Method for manufacturing high-performance polyphenylene sulfide fibre paper
CN102822400A (en) * 2010-03-31 2012-12-12 可隆工业株式会社 Method for preparing carbon fiber and precursor fiber for carbon fiber
CN103894150A (en) * 2014-03-31 2014-07-02 沈阳工业大学 Preparation method of carbon membrane for oil-water separation
JP2017057511A (en) * 2015-09-14 2017-03-23 明成化学工業株式会社 Dispersant for wet type paper, dispersion composition for wet type paper and fiber sheet
CN105599321A (en) * 2016-02-06 2016-05-25 陕西科技大学 Preparation method and application of carbon fiber reinforced polymer-based composite material
CN108786273A (en) * 2018-08-10 2018-11-13 安徽原野滤材有限公司 A kind of oil-resistant high-temperature filter cloth for water-oil separating
JP2020051000A (en) * 2018-09-27 2020-04-02 三菱製紙株式会社 Manufacturing method of carbon fiber unwoven fabric
CN110528314A (en) * 2019-06-19 2019-12-03 武汉纺织大学 A kind of composite sheet and its preparation method and application of the polyphenylene sulfide superfine fiber containing melt-blown
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CN114808538A (en) * 2022-05-12 2022-07-29 江西龙泰新材料股份有限公司 High-flame-retardant aramid composite paper and preparation method thereof

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