CN102627785A - Teflon dynamic low temperature plasma surface modified long-acting hydrophilic membrane and its preparation method - Google Patents
Teflon dynamic low temperature plasma surface modified long-acting hydrophilic membrane and its preparation method Download PDFInfo
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- CN102627785A CN102627785A CN2011102510895A CN201110251089A CN102627785A CN 102627785 A CN102627785 A CN 102627785A CN 2011102510895 A CN2011102510895 A CN 2011102510895A CN 201110251089 A CN201110251089 A CN 201110251089A CN 102627785 A CN102627785 A CN 102627785A
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Abstract
The invention relates to a teflon dynamic low temperature plasma surface modified long-acting hydrophilic membrane and its preparation method. The teflon dynamic low temperature plasma surface modified long-acting hydrophilic membrane is composed of three layered structures: an interface layer is a teflon membrane (1) of 0.025-1mm thickness, and each of the upper and lower surfaces of the teflon membrane is coated with a layer of low temperature plasma hydrophilic membrane (2) (3) of 10-300nm thickness. The hydrophilic membrane provided by the invention has advantages of simple structure, reasonable design, good surface hydrophilic effect, long maintenance time of the hydrophilic effect, high production efficiency and no influence of the preparation process on the environment, and can meet requirements on printing, gluing, bonding and compounding with other materials.
Description
(1) technical field
The present invention relates to long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of a kind of tetrafluoroethylene and preparation method thereof.
(2) background technology
The polytetrafluoroethylene (PTFE) material has the excellent comprehensive performance; The good reputation that " plastics king " arranged, but because this material molecule structure height symmetry, percent crystallinity is high and do not contain reactive group; Cause its surface energy very low (19dyns/cm), surface hydrophobicity high (with water contact angle above 100 °).This extremely low surfactivity and non-viscosity have had a strong impact on the application of PTFE at aspects such as bonding, printing and dyeing, physiologically acceptable, have particularly limited the compound of polytetrafluoroethylene film and other materials.
At present, PTFE surface treatment method commonly used is the wet-chemical treatment method, i.e. naphthalene-sodium, ammonia-sodium solution facture, and this method has a lot of shortcomings: handle back obviously deepening of PTFE surface, blackening, influence material appearance; Handle the back surface resistivity of PTFE when high temperature and descend, long-term exposure in the sun, the material adhesive performance can seriously reduce; Treating processes can produce a large amount of harmful waste liquids, and both serious environment pollutions increases the processing cost of enterprise again, does not meet environmental protection policy.
The low-temperature plasma surface treatment is a kind of emerging surface treatment means; It mainly is to utilize low-temperature plasma bombardment material surface; The chemical bond of material surface molecule is opened, and with plasma body in combined with radical, form polar group at material surface.Because the surface has increased a large amount of polar groups, thereby can improve the adhesiveproperties, printing performance, dyeing behavior etc. of material surface significantly.
Compare with the wet-chemical treatment method, the low-temperature plasma surface treatment has following obvious advantage: treatment temp is low, and the treatment time is short, energy efficient, but shortened process; Do not use industrial chemicals such as soda acid in the treating processes, avoided the moist production environment of high temperature; Handle the degree of depth and be merely hundreds of dusts, do not influence the inherent nature of matrix to several nanometers; Treating processes belongs to dry process, can significantly reduce water resources consumption, and the conserve water resource is had important social and economic significance; Three-waste free discharge in the treating processes had both been protected environment, had practiced thrift the pollution treatment expense of enterprise again, met the environmental protection policy of country; Can adopt different gaseous medias to handle, surface chemical structure and the character final to material have controllability preferably.
But existing low-temperature plasma surface treatment is static treatment basically, is not suitable for the thin film production in enormous quantities based article, and in addition, holding time of processing back hydrophilic effect is shorter, generally has only several hrs to arrive several time-of-weeks.
(3) summary of the invention
The objective of the invention is to overcome the weak point of prior art, the long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of tetrafluoroethylene long, that the preparation process does not have influence and environmentally safe basically to the outward appearance and the mechanical property of base material that provides that a kind of production efficiency is high, hydrophilicity is good, hydrophilic effect is held time.
The present invention also aims to provide the preparation method of the long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of a kind of said tetrafluoroethylene.
The long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of said tetrafluoroethylene is characterized in that being three-decker; The middle layer is that the thick polytetrafluoroethylene film of 0.025mm～1mm is the middle layer, and the polytetrafluoroethylene film upper and lower surfaces is respectively with the thick low-temperature plasma hydrophilic film of one deck 10nm～300nm.
The surface tension of the long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of said tetrafluoroethylene is not less than 48dyne/cm, and water contact angle is not higher than 40 °, and the index of surface tension and water contact angle can be kept 3～6 months.
The low-temperature plasma hydrophilic film that said 10nm～300nm is thick is to make through surface modification of low temperature plasma.
The preparation method of the long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of said tetrafluoroethylene comprises the steps:
Through drying, base, sintering, rotary cut, processing thickness is the tetrafluoroethylene rotary cut film of 0.025mm～1mm with polytetrafluoroethylsuspending suspending resin;
Prepared tetrafluoroethylene rotary cut film is carried out the low-temperature plasma surface-treated; Respectively generate one deck 10nm～300nm thick low-temperature plasma hydrophilic film (2), (3) at rotary cut film upper and lower surfaces, process the long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of tetrafluoroethylene.
The dynamichandling form that said low-temperature plasma surface-treated is a volume to volume.
The plasma treatment frequency of said low-temperature plasma surface-treated is 13.56MHz.
The dynamichandling speed of said volume to volume is 1.5-2.5m/min.
The present invention is simple in structure, reasonable in design, and its surface hydrophilic is effective, the hydrophilic effect length of holding time, and production efficiency is high, and the preparation process does not have influence to environment.The present invention can satisfy printing, gluing, bonding and with other material compound demand.
(4) description of drawings
Fig. 1 is the long-acting hydrophilic film section structure of the dynamic surface modification of low temperature plasma of a tetrafluoroethylene of the present invention synoptic diagram.
(1) is the polytetrafluoroethylene film layer among the figure, and (2), (3) are the low-temperature plasma hydrophilic membrane.
(5) embodiment
Below in conjunction with accompanying drawing the present invention is described further.
The preparation of the long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of embodiment tetrafluoroethylene
1. teflon resin through drying, base, sintering, rotary cut, makes polytetrafluoroethylene film successively.
2. polytetrafluoroethylene film is carried out dynamic surface modification of low temperature plasma (handling frequency 13.56MHz, processing speed 2.5m/min), make its upper and lower surfaces respectively adhere to one deck low-temperature plasma hydrophilic film.
The long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of prepared tetrafluoroethylene is made up of following three-decker:
The thick low-temperature plasma hydrophilic film of 10-300nm;
0.1mm thick polytetrafluoroethylene film;
The thick low-temperature plasma hydrophilic film of 10-300nm.
Embodiment Performance Detection data
| Test event | Index |
| Surface tension | 48dyne/cm |
| Water contact angle | 36° |
| Surface tension and water contact angle index are held time | 4 months |
Claims (8)
1. the long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of tetrafluoroethylene is characterized in that being 3-tier architecture; The middle layer is the thick polytetrafluoroethylene film of 0.025mm～1mm (1), and the polytetrafluoroethylene film upper and lower surfaces is respectively with thick low-temperature plasma hydrophilic film (2), (3) of one deck 10nm～300nm.
2. the surface tension of the long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of tetrafluoroethylene is not less than 48dyne/cm according to claim 1, and water contact angle is not higher than 40 °.
3. can keep 3～6 months like the surface tension and the water contact angle index of the long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of the said tetrafluoroethylene of claim 2.
4. low-temperature plasma hydrophilic film (2), (3) that 10nm～300nm is thick according to claim 1 are that the dynamic surface modification of low temperature plasma through volume to volume makes.
5. the preparation method of the long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of tetrafluoroethylene comprises the steps:
Through drying, base, sintering, rotary cut, processing thickness is the tetrafluoroethylene rotary cut film of 0.025mm～1mm with polytetrafluoroethylsuspending suspending resin;
Prepared tetrafluoroethylene rotary cut film is carried out the low-temperature plasma surface-treated; Respectively generate one deck 10nm～300nm thick low-temperature plasma hydrophilic film (2), (3) at rotary cut film upper and lower surfaces, process the long-acting hydrophilic film of the dynamic surface modification of low temperature plasma of tetrafluoroethylene.
6. the dynamichandling form that is volume to volume like the said low-temperature plasma surface-treated of claim 5.
7. the plasma treatment frequency like the said low-temperature plasma surface-treated of claim 5 is 13.56MHz.
8. the dynamichandling speed like the said volume to volume of claim 6 is 1.5-2.5m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102510895A CN102627785A (en) | 2011-08-30 | 2011-08-30 | Teflon dynamic low temperature plasma surface modified long-acting hydrophilic membrane and its preparation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102510895A CN102627785A (en) | 2011-08-30 | 2011-08-30 | Teflon dynamic low temperature plasma surface modified long-acting hydrophilic membrane and its preparation method |
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| CN102627785A true CN102627785A (en) | 2012-08-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872732A (en) * | 2012-10-22 | 2013-01-16 | 浙江理工大学 | Hydrophilic modification method for polytetrafluoroethylene microporous material |
| CN107079207A (en) * | 2014-10-16 | 2017-08-18 | 日东电工株式会社 | Sound passing membrane and the entrant sound film structural component and microphone and electronic equipment for possessing the sound passing membrane |
| CN109456504A (en) * | 2018-09-28 | 2019-03-12 | 中国人民解放军第五七九工厂 | A kind of method that aero-engine polytetrafluoroethylene material surface made in Russia is modified |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6432510B1 (en) * | 1998-11-11 | 2002-08-13 | Samyang Corporation | Fluorinated resins having a surface with high wettability |
| JP2004103251A (en) * | 2002-09-04 | 2004-04-02 | Sekisui Chem Co Ltd | Discharge plasma treatment device |
-
2011
- 2011-08-30 CN CN2011102510895A patent/CN102627785A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6432510B1 (en) * | 1998-11-11 | 2002-08-13 | Samyang Corporation | Fluorinated resins having a surface with high wettability |
| JP2004103251A (en) * | 2002-09-04 | 2004-04-02 | Sekisui Chem Co Ltd | Discharge plasma treatment device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872732A (en) * | 2012-10-22 | 2013-01-16 | 浙江理工大学 | Hydrophilic modification method for polytetrafluoroethylene microporous material |
| CN107079207A (en) * | 2014-10-16 | 2017-08-18 | 日东电工株式会社 | Sound passing membrane and the entrant sound film structural component and microphone and electronic equipment for possessing the sound passing membrane |
| CN107079207B (en) * | 2014-10-16 | 2021-02-05 | 日东电工株式会社 | Sound-transmitting film, sound-transmitting film member provided with same, microphone, and electronic device |
| CN109456504A (en) * | 2018-09-28 | 2019-03-12 | 中国人民解放军第五七九工厂 | A kind of method that aero-engine polytetrafluoroethylene material surface made in Russia is modified |
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Application publication date: 20120808 |
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