CN115073795B - Hydrophobic polymer material surface hydrophilic modification method based on carbon dioxide plasma - Google Patents
Hydrophobic polymer material surface hydrophilic modification method based on carbon dioxide plasma Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 38
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 38
- 239000002861 polymer material Substances 0.000 title claims abstract description 34
- 229920001600 hydrophobic polymer Polymers 0.000 title claims abstract description 27
- 238000002715 modification method Methods 0.000 title abstract description 10
- 238000009832 plasma treatment Methods 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 33
- 230000004048 modification Effects 0.000 claims abstract description 18
- 238000012986 modification Methods 0.000 claims abstract description 18
- 239000007921 spray Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 36
- -1 polyethylene Polymers 0.000 claims description 15
- 229920000728 polyester Polymers 0.000 claims description 11
- 239000004743 Polypropylene Substances 0.000 claims description 10
- 229920001155 polypropylene Polymers 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 230000002209 hydrophobic effect Effects 0.000 claims 3
- 239000012467 final product Substances 0.000 claims 1
- 230000004913 activation Effects 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 10
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 239000006260 foam Substances 0.000 description 8
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 8
- 239000004745 nonwoven fabric Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- HWSSEYVMGDIFMH-UHFFFAOYSA-N 2-[2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOCCOC(=O)C(C)=C HWSSEYVMGDIFMH-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 238000010559 graft polymerization reaction Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000678 plasma activation Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
- C08J7/123—Treatment by wave energy or particle radiation
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
- D06M10/025—Corona discharge or low temperature plasma
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
- D06M10/06—Inorganic compounds or elements
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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- Inorganic Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Plasma & Fusion (AREA)
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Abstract
The application discloses a hydrophobic polymer material surface hydrophilic modification method based on carbon dioxide plasma, which comprises the following steps: step one: spraying plasma jet on the surface of the hydrophobic polymer material by adopting a high-pressure air plasma spray gun to obtain a cleaned hydrophobic polymer material; step two: placing the cleaned hydrophobic polymer material in a plasma treatment device, vacuumizing the plasma treatment device, then introducing a first mixed gas, controlling the gas flow, regulating the gas pressure in the plasma treatment device, and starting a power supply to perform plasma modification treatment on the surface of the polymer material after the gas pressure in the plasma treatment device is stable to obtain a pre-modified material; step three: and (3) turning off the power supply of the plasma treatment device, and standing the pre-modified material in the plasma treatment device to obtain the modified material. The surface of the polymer material treated by the method has good hydrophilicity, and can also realize the activation and reutilization of carbon dioxide.
Description
Technical Field
The application relates to the technical field of material modification, in particular to a hydrophobic polymer material surface hydrophilic modification method based on carbon dioxide plasma.
Background
The plasma surface treatment technology is to excite gas molecules by certain energy to make the gas dissociated into excited states such as electrons, ions, free radicals, other metastable states and the like, collide with the surface of the material, break covalent bonds, generate free radicals and activate the surface of the material. While the activated material surface may combine with the excited gas to produce chemically reactive groups at the surface. At present, the plasma surface treatment technology is widely used in the industries of electroplating, coating and printing ink, and the bonding force between the plasma surface treatment technology and a substrate is increased. Some researchers have plasma modified the bamboo surface with plasma, and found that plasma treatment can effectively reduce the contact angle of the bamboo surface to water, but the contact angle surface slowly recovers with time. The applicant has also studied plasma technology encapsulation to find that the plasma can activate any material surface, but the activating groups annihilate over time. Therefore, in order to obtain a material surface with better hydrophilicity, some researchers adopt a plasma grafting technology to carry out graft polymerization on a hydrophilic monomer or polymer on a hydrophobic surface after plasma activation, and the obtained material surface has a lower contact angle. The results of steam treatment of feldspathic ceramics generated by ionization of triethylene glycol dimethacrylate by using normal pressure helium gas plasma of Han et al show that the surface of ceramics treated by plasma jet contains hydroxyl free radicals and the hydrophilicity is improved.
Carbon dioxide is a very stable molecule and is relatively difficult to excite and then react. Global warming caused by carbon dioxide-based greenhouse gas emissions is severely threatening the survival and sustainable development of humans, and is one of the significant global challenges facing humans at present. Meanwhile, the task of improving the environmental quality in the current stage of China is still serious, and in recent years, a lot of researches are focused on carbon dioxide adsorption and energy regeneration and utilization. Among them, the study of catalytic decomposition of carbon dioxide by plasma technology has become one of the hot spots of carbon dioxide energy research, but the conversion rate of carbon monoxide or methane is not ideal at present, and the utilization rate of carbon dioxide is not high. It has been found that carbon dioxide is activated as an electron acceptor, and blending carbon dioxide with a rare gas such as oxygen or argon can improve the decomposition efficiency of carbon dioxide to some extent. The polymer material loses electrons after being bombarded by ions to generate some activated groups, and the activated carbon dioxide is beneficial to covalent bonding with the surface of the material while accelerating the decomposition of the carbon dioxide, so that permanent hydrophilic groups are formed on the surface of the material. The application aims to activate and reuse carbon dioxide, and generate more hydrophilic groups on the surface of a material, thereby reducing the emission of the carbon dioxide in the environment.
Disclosure of Invention
The application aims to provide a vacuum plasma surface hydrophilic modification technology of carbon dioxide atmosphere, which ionizes carbon dioxide by utilizing high-frequency electricity, so that the hydrophilic modification of the surface of a hydrophobic polymer film can be realized, the reutilization of carbon dioxide can be realized, and the emission of carbon dioxide can be reduced.
In order to achieve the above purpose, the present application provides the following technical solutions:
the application provides a hydrophobic polymer material surface hydrophilic modification method based on carbon dioxide plasma, which comprises the following steps:
step one: spraying plasma jet on the surface of the hydrophobic polymer material by adopting a high-pressure air plasma spray gun to obtain a cleaned hydrophobic polymer material;
step two: placing the cleaned hydrophobic polymer material in a plasma treatment device, vacuumizing the plasma treatment device, then introducing a first mixed gas, controlling the gas flow, regulating the gas pressure in the plasma treatment device, and starting a power supply to perform plasma modification treatment on the surface of the polymer material after the gas pressure in the plasma treatment device is stable to obtain a pre-modified material;
step three: and (3) turning off the power supply of the plasma treatment device, and standing the pre-modified material in the plasma treatment device to obtain the modified material.
Further, in the second step, the first mixed gas includes carbon dioxide and a second mixed gas, and the volume ratio of the second mixed gas to the carbon dioxide is (0-5): (95-100).
Further, the second mixed gas is oxygen or a rare gas.
Further, in the second step, the vacuum is pumped until the vacuum degree is 5-10Pa, the modification treatment time is 3-10min, the modification treatment pressure is 20-80Pa, and the power of the plasma treatment device is 50-300W.
Further, in the third step, the pre-modified material is kept stand in the plasma treatment device for 30s-3min.
Further, the hydrophobic polymer material comprises polyethylene, polypropylene, polyesters, silica gel.
Compared with the prior art, the application has the beneficial effects that:
the method for modifying the surface of the hydrophobic polymer material based on the carbon dioxide plasma has good hydrophilicity on the surface of the polymer material treated by the plasma, and is used in the fields of super-absorbent materials, biomedical materials, oil-water separation and the like. And the modified polymer material has better surface hydrophilicity stability, and the contact angle does not change obviously along with the time. Compared with the existing plasma surface modification technology, the method does not need a polymer monomer, is not easy to produce pollution, and can realize the activation and recycling of carbon dioxide, thereby reducing the storage of carbon dioxide in the environment. The method has short reaction time and good modification effect in the modification process.
Drawings
FIG. 1 is a schematic view showing the effect of the modification in example 1;
FIG. 2 is a schematic view showing the effect of the modification in example 3;
FIG. 3 is a schematic view showing the effect of the modification in example 4.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application provides a hydrophobic polymer material surface hydrophilic modification method based on carbon dioxide plasma, which comprises the following steps:
step one: spraying plasma jet on the surface of the hydrophobic polymer material by adopting a high-pressure air plasma spray gun to obtain a cleaned hydrophobic polymer material;
step two: placing the cleaned hydrophobic polymer material in a plasma treatment device, vacuumizing the plasma treatment device, then introducing a first mixed gas, controlling the gas flow, regulating the gas pressure in the plasma treatment device, and starting a high-frequency power supply to perform plasma modification treatment on the surface of the polymer material after the gas pressure in the plasma treatment device is stable to obtain a pre-modified material;
step three: turning off the high-frequency power supply of the plasma processing device, and standing the pre-modified material in the plasma processing device to obtain the modified material.
Specifically, in the second step, the first mixed gas includes carbon dioxide and a second mixed gas, and the volume ratio of the second mixed gas to the carbon dioxide is (0-5): (95-100).
Specifically, the second mixed gas is oxygen or a rare gas.
Specifically, in the second step, the vacuum is pumped until the vacuum degree is 5-10Pa, the modification treatment time is 3-10min, the modification treatment pressure is 20-80Pa, and the power of the plasma treatment device is 50-300W.
Specifically, in the third step, the pre-modified material is kept stand in the plasma treatment device for 30s-3min.
Specifically, the hydrophobic polymer material comprises polyethylene, polypropylene, polyester, silica gel, rubber and other materials film, rod-like or three-dimensional material.
Example 1
The embodiment discloses a hydrophobic polymer material surface hydrophilic modification method based on carbon dioxide plasma, which comprises the following steps:
s1: the polypropylene spun-bonded non-woven fabric is placed on an operation table, a high-pressure atmospheric plasma spray gun capable of moving in two dimensions at the speed of 5m/min is adopted, plasma jet is sprayed on the surface of the polypropylene spun-bonded non-woven fabric, and the polypropylene spun-bonded non-woven fabric is cleaned under the voltage of 200V and the discharge frequency of 15 kHz.
S2: placing the cleaned polypropylene spun-bonded non-woven fabric into a plasma treatment device, pumping the plasma treatment device to a vacuum degree of 5Pa, and introducing CO 2 The gas pressure in the plasma processing apparatus was adjusted to 40Pa. After stabilization, the high-frequency power supply is started, the processing power is 300W, and the processing time is 5min.
S3: and (3) turning off a high-frequency power supply, taking out the polypropylene spun-bonded non-woven fabric after 1min to obtain modified polypropylene, and measuring that the contact angle of the modified polypropylene is reduced from 97.5 ℃ before treatment to 48.5 ℃. After one month, the contact angle was measured to be 49.9 °, as shown in fig. 1.
Example 2
The embodiment discloses a hydrophobic polymer material surface hydrophilic modification method based on carbon dioxide plasma, which comprises the following steps:
placing ultra-high molecular weight polyethylene rod-like material on an operation table, and moving up and down at a speed of 10m/min, 15 o And (3) jetting a plasma jet on the surface of the ultra-high molecular weight polyethylene rod-shaped material by a high-pressure atmospheric plasma spray gun rotating at the speed of/min, and cleaning the ultra-high molecular weight polyethylene rod at the voltage of 200V and the discharge frequency of 15 kHz.
Placing the cleaned ultra-high molecular weight polyethylene rod in a constant temperature rangeIn the ion treatment device, the plasma treatment device is pumped to a vacuum degree of 5Pa, and CO is introduced 2 And O 2 Wherein O is 2 The volume ratio is 5%. The gas pressure in the plasma processing apparatus was adjusted to 80Pa. After stabilization, a high-frequency power supply is started, the treatment power is 250W, and the treatment time is 10min.
And (3) turning off the high-frequency power supply, taking out the ultra-high molecular weight polyethylene rod after 3min to obtain a modified ultra-high molecular weight polyethylene rod, and taking out the modified ultra-high molecular weight polyethylene rod after immersing the modified ultra-high molecular weight polyethylene rod in water to obtain a relatively uniform water film, wherein liquid drops do not flow down in a stranding manner.
Example 3
The embodiment discloses a hydrophobic polymer material surface hydrophilic modification method based on carbon dioxide plasma, which comprises the following steps:
s1: the polyester foam is placed on an operation table, a high-pressure atmospheric plasma spray gun capable of two-dimensionally moving at a speed of 5m/min is adopted, plasma jet is sprayed on the surface of the polyester foam, and the polyester foam is cleaned under the voltage of 200V and the discharge frequency of 15 kHz.
S2: placing the cleaned polyester foam into a plasma treatment device, pumping the plasma treatment device to a vacuum degree of 7Pa, and introducing CO 2 And O 2 Wherein O is 2 The volume ratio is 2%. The gas pressure in the plasma processing apparatus was adjusted to 20Pa. After stabilization, the high-frequency power supply is started, the treatment power is 50W, and the treatment time is 10min.
S3: the high frequency power was turned off, and after 3 minutes the polyester foam was removed and its contact angle was measured to decrease from 90 ° to 38.4 °. After one month, the contact angle was measured to be 37 °, as shown in fig. 2.
Example 4
The embodiment discloses a hydrophobic polymer material surface hydrophilic modification method based on carbon dioxide plasma, which comprises the following steps:
s1: the polytetrafluoroethylene plate is placed on an operation table, a normal pressure atmospheric plasma spray gun capable of moving in two dimensions at a speed of 1m/min is adopted, plasma jet is sprayed on the surface of the polytetrafluoroethylene plate, and the polyester foam is cleaned under the voltage of 200V and the discharge frequency of 15 kHz.
S2: placing the cleaned polyester foam into a plasma treatment device, pumping the plasma treatment device to a vacuum degree of 5Pa, and introducing CO 2 And O 2 Wherein O is 2 The volume ratio is 1%. The gas pressure in the plasma processing apparatus was adjusted to 60Pa. After stabilization, the high-frequency power supply is started, the processing power is 300W, and the processing time is 8min.
S3: the high frequency power supply was turned off, and after 3 minutes the polyester foam was removed and its contact angle was measured to decrease from 103 ° to 64 °. After one month, the contact angle was measured to be 68 °, as shown in fig. 3.
It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (2)
1. A method for hydrophilically modifying the surface of a hydrophobic polymer material based on carbon dioxide plasma, which is characterized by comprising the following steps:
step one: spraying plasma jet on the surface of the hydrophobic polymer material by adopting a high-pressure air plasma spray gun to obtain a cleaned hydrophobic polymer material;
step two: placing the cleaned hydrophobic polymer material in a plasma treatment device, vacuumizing the plasma treatment device until the vacuum degree is 5-10Pa, then introducing a first mixed gas, controlling the gas flow, regulating the gas pressure in the plasma treatment device, starting a power supply after the gas pressure in the plasma treatment device is stable, and carrying out plasma modification treatment on the surface of the polymer material for 3-10min, wherein the pressure of the modification treatment is 20-80Pa, so as to obtain a pre-modified material; the first mixed gas comprises carbon dioxide and a second mixed gas, and the volume ratio of the second mixed gas to the carbon dioxide is (0-5): (95-100), the second mixed gas is oxygen or rare gas; the power of the plasma treatment device is 50-300W;
step three: turning off the power supply of the plasma treatment device, and standing the pre-modified material in the plasma treatment device for 30s-3min to obtain the final product.
2. The method for modifying the surface hydrophilicity of a hydrophobic polymeric material based on carbon dioxide plasma according to claim 1, wherein the hydrophobic polymeric material comprises polyethylene, polypropylene, polyesters, silica gel, rubber-like materials, and the hydrophobic polymeric material has a form of film, rod-like or three-dimensional structure.
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| AU7135087A (en) * | 1986-04-11 | 1987-10-15 | Applied Membrane Technology Inc. | Preparation of a hydrophilic microfiltration membrane by means of plasma treatment |
| KR20090108874A (en) * | 2008-04-14 | 2009-10-19 | 한국기초과학지원연구원 | Surface modification for hydrophilic and biodegradable polymers to control their reaction rate using CO2 reactive gas by inductively coupled plasma method |
| CN103861465A (en) * | 2014-03-21 | 2014-06-18 | 东华大学 | Method for modifying surface super-hydrophilicity of hydrophobic separation membrane material |
| CN107118381A (en) * | 2017-06-16 | 2017-09-01 | 南京工业大学 | The hydrophilically modified plasma processing apparatus of polytetrafluoroethylene (PTFE) and method |
| CN109957133A (en) * | 2017-12-25 | 2019-07-02 | 中国石油化工股份有限公司 | A kind of polyurethane hydrophilic method of modifying based on plasma surface modification |
| CN110591136A (en) * | 2018-06-13 | 2019-12-20 | 中国石油化工股份有限公司 | Method for hydrophilic modification of surface of polyurethane carrier |
| CN110591137A (en) * | 2018-06-13 | 2019-12-20 | 中国石油化工股份有限公司 | Method for hydrophilic modification of surface of polyurethane carrier |
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