CN104117396A - Super-hydrophobic pipette gun head and preparation method thereof - Google Patents
Super-hydrophobic pipette gun head and preparation method thereof Download PDFInfo
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- CN104117396A CN104117396A CN201310150523.XA CN201310150523A CN104117396A CN 104117396 A CN104117396 A CN 104117396A CN 201310150523 A CN201310150523 A CN 201310150523A CN 104117396 A CN104117396 A CN 104117396A
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Abstract
The invention belongs to the field of biological detection and chemical detection, and in particular relates to a super hydrophobic pipette gun head and a preparation method thereof. The commercialized pipette gun head is dipped into a coating solution which is obtained by mixing a fluorinated polymer, an inorganic nano fiber and an organic solvent, and then is slowly pulled out and dried, the surface of the pipette gun head is modified with a film formed by compounding the fluorinated polymer and the inorganic nano fiber, and the surface of the film is provided with nanoscale projection structures formed by compounding the fluorinated polymer and the inorganic nano fiber, and then the super hydrophobic pipette gun head is obtained. The contact angle between water drops in the air and the pipe wall surface of the super hydrophobic pipette gun head is greater than 170 degrees, the rolling angle is less than 2 degrees, and by use of the super hydrophobic pipette gun head, liquid drops with a minimum volume in picoliter level can be hit without complex instruments.
Description
Technical field
The invention belongs to biological detection, field of chemical detection, particularly there is liquid-transfering gun rifle head of super-hydrophobicity and preparation method thereof.
Background technology
The liquid-transfering gun rifle head that use has a super-hydrophobicity is got and is received other drop of upgrading and have very important effect for chemical analysis, biological detection, biomedicine field.There is the amount that the use of the liquid-transfering gun rifle head of super-hydrophobicity can be saved tracer liquid, particularly reduce the consumption of expensive drugs.Super hydrophobic material has the characteristic to the low adhesion of water droplet, therefore uses the liquid-transfering gun rifle head with super-hydrophobicity can effectively reduce the adhesiveness of rifle head to the drop of getting.The use of this liquid-transfering gun rifle head with super-hydrophobicity is conducive to drop and leaves rifle head surface, can effectively reduce the residual of rifle head surface drop, makes the volume of the drop of getting more accurate.In addition, than traditional liquid-transfering gun rifle head, use the liquid-transfering gun rifle head with super-hydrophobicity will not contact with orifice plate or liquid level by drop, can improve the distribution speed of drop.Therefore the liquid-transfering gun rifle head that a kind of how to find simple and effective method obtains having super-hydrophobicity just becomes Qiang Tou production firm and analysis, experimenter institute questions of common interest.
Summary of the invention
One of object of the present invention is to provide a kind of liquid-transfering gun rifle head with super-hydrophobicity.
Two of object of the present invention is to provide a kind of becomes coating solution that contains fluorinated polymer and inorganic nano-fiber of the liquid-transfering gun rifle head with super-hydrophobicity and preparation method thereof for modifying commercial liquid-transfering gun rifle head.
Three of object of the present invention is to provide a kind of preparation method of the liquid-transfering gun rifle head with super-hydrophobicity.
The liquid-transfering gun rifle head with super-hydrophobicity of the present invention is to have in the finishing of liquid-transfering gun rifle head the film being compounded to form by fluorinated polymer and inorganic nano-fiber, and has the raised structures of the nano-scale being compounded to form by described fluorinated polymer and described inorganic nano-fiber on the surface of described film.
The tube wall surface of the liquid-transfering gun rifle head with super-hydrophobicity of the present invention is greater than 170 ° to the contact angle of water droplet in air, tumbles angle and is less than 2 °.
The width of described film is not particularly limited, and being generally 200 μ m can the tail end of liquid-transfering gun rifle head (from the tip of liquid-transfering gun rifle head to).
Fluorinated polymer in the film that described fluorinated polymer and inorganic nano carbon fiber are compounded to form and the weight ratio of inorganic nano-fiber are 1:1~5:3.
Described fluorinated polymer is selected from fluorinated polypropylene, Kynoar, fluoridizes polyisobutene, one in polytetrafluoroethylene (PTFE).
Described inorganic nano-fiber is selected from the one in carbon nano-fiber, zinc oxide nano fiber, titanium dioxide nanofiber.
The fibre length of described carbon nano-fiber, zinc oxide nano fiber, titanium dioxide nanofiber is all 100nm to 2 μ m.
The preparation method of the liquid-transfering gun rifle head with super-hydrophobicity of the present invention comprises the following steps:
(1) at room temperature, fluorinated polymer is mixed with inorganic nano-fiber and organic solvent, stir, obtain the coating solution that contains fluorinated polymer and inorganic nano-fiber; Wherein, the content of the inorganic nano-fiber in coating solution is that the content of 5~30wt%, fluorinated polymer is that 5~50wt%, surplus are organic solvent;
(2) commercial liquid-transfering gun rifle head is dipped in the coating solution that step (1) obtains, keep certain hour, slowly pull out and be dried, the film being compounded to form by fluorinated polymer and inorganic nano-fiber in the finishing of liquid-transfering gun rifle head, and there is the raised structures of the nano-scale being compounded to form by described fluorinated polymer and described inorganic nano-fiber on the surface of described film, obtain thus having the liquid-transfering gun rifle head of super-hydrophobicity.
Described organic solvent is selected from the one in methyl alcohol, ethanol, propyl alcohol, butanols, acetone, butanone, pentane, n-hexane, normal heptane, normal octane, benzene, toluene, oxolane, carbon disulfide.
The coating solution that contains fluorinated polymer and inorganic nano-fiber of the liquid-transfering gun rifle head for the preparation of having super-hydrophobicity of the present invention is made up of fluorinated polymer and inorganic nano-fiber and organic solvent, wherein: the content of inorganic nano-fiber is that the content of 5~30wt%, fluorinated polymer is that 5~50wt%, surplus are organic solvent.
Described polymer is selected from fluorinated polypropylene, Kynoar, fluoridizes polyisobutene, one in polytetrafluoroethylene (PTFE).
Described inorganic nano-fiber is selected from the one in carbon nano-fiber, zinc oxide nano fiber, titanium dioxide nanofiber.
The fibre length of described carbon nano-fiber, zinc oxide nano fiber, titanium dioxide nanofiber is all 100nm to 2 μ m.
Described organic solvent is selected from the one in methyl alcohol, ethanol, propyl alcohol, butanols, acetone, butanone, pentane, n-hexane, normal heptane, normal octane, benzene, toluene, oxolane, carbon disulfide.
The liquid-transfering gun rifle head with super-hydrophobicity of the present invention is to have in the finishing of commercial liquid-transfering gun rifle head the film being compounded to form by fluorinated polymer and inorganic nano-fiber, this film and liquid-transfering gun rifle head material have strong affinity, and have good water resistant stream frictional behaviour.The coating solution that contains fluorinated polymer and inorganic nano-fiber of the present invention can directly spread over the surface of liquid-transfering gun rifle head, forms after film without aftertreatment technology.This film has super-hydrophobicity (being greater than 170 ° at the contact angle of water in air and film), and glassware for drinking water is had the characteristic of the low adhesion that is less than 5 micro-oxen in air.What in air, the adhesion force measurement of water droplet is used is high sensitivity micro electro mechanical balance sysmte (DataPhysics, DCAT11Germany).The water droplet of 3 microlitre sizes is fixed with metal cap and in air atmosphere, with 0.005mms
-1speed control water droplet and the extruding of film Surface Contact, then set back, and with the variation of the whole process power of computer recording, and reads film surface adhesion to water droplet in air.
The coating solution that contains fluorinated polymer and inorganic nano-fiber of the present invention is dissolved in commercial inorganic nano-fiber and fluorinated polymer in organic solvent and obtains according to a certain percentage.The coating solution that contains fluorinated polymer and inorganic nano-fiber of the present invention and liquid-transfering gun rifle head material have good cohesive, and the existence of inorganic nano-fiber has increased the water resistant stream frictional behaviour of liquid-transfering gun rifle head surface film, friction resistant performance increases with the increase of the amount of inorganic nano-fiber, the surfacing of liquid-transfering gun rifle head and the cohesive of film increase with the increase of the amount of fluorinated polymer, and the viscosity of the coating solution that contains fluorinated polymer and inorganic nano-fiber increases along with the increase of fluorinated polymer amount.
There is the film compound formed by the coating solution of fluorinated polymer and inorganic nano-fiber on the surface of the liquid-transfering gun rifle head with super-hydrophobicity of the present invention, the microstructure of this film can be caught a large amount of air, thereby can reduce the contact area on water and coarse structure surface, obtain and there is aerial super-hydrophobicity.
The surface of the liquid-transfering gun rifle head with super-hydrophobicity of the present invention has the characteristic to the low adhesion of water droplet, therefore use the liquid-transfering gun rifle head with super-hydrophobicity of the present invention can be conducive to drop and leave rifle head surface, can effectively reduce the residual of rifle head surface drop, make the volume of the drop of getting more accurate, use this liquid-transfering gun rifle head with super-hydrophobicity can in the situation that not needing complex instrument, get minimum volume at skin other drop of upgrading.
Brief description of the drawings
Fig. 1. the liquid-transfering gun rifle head that the liquid-transfering gun rifle head with super-hydrophobicity that there is a super-hydrophobic coat on the surface of the embodiment of the present invention 1 a) does not have coating with surface contrast optical photograph b).
Fig. 2. the glass surface that scribbles coating solution of the embodiment of the present invention 1 is measured the picture of the contact angle of water droplet (3 microlitre) in air, and the surperficial contact angle of the film that water forms at coating solution is greater than 170 °.
Detailed description of the invention
Embodiment 1.
(1) under room temperature, in 2L round-bottomed flask, adding 25g fibre length is zinc oxide nano fiber, the fluorinated polypropylene of 25g and the oxolane of 400g of 500nm, and magnetic agitation mixes, and obtains coating solution;
(2) commercial liquid-transfering gun rifle head is dipped in the coating solution that step (1) obtains, keep 5 minutes, slowly pull out and be dried, the film being compounded to form by fluorinated polypropylene and zinc oxide nano fiber in the finishing of liquid-transfering gun rifle head, this film is greater than 170 ° to the contact angle of water droplet in air, tumble angle and be less than 1 °, the adhesion of water droplet is less than to 5 micro-oxen; And there is the raised structures of the nano-scale being compounded to form by fluorinated polypropylene and zinc oxide nano fiber on the surface of described film, obtain thus having the liquid-transfering gun rifle head of super-hydrophobicity.
Fig. 1 shown in the time using liquid-transfering gun (load 0.5 – 10 μ L) to get 0.5 μ L drop, the liquid-transfering gun rifle head that the liquid-transfering gun rifle head with super-hydrophobicity that there is a super-hydrophobic coat on captured surface a) does not have coating with surface contrast optical photograph b).Surface a) of the liquid-transfering gun rifle head with super-hydrophobicity does not have the residual of liquid, and the liquid-transfering gun rifle head that surface does not have coating outer surface b) has the residual of liquid.
Fig. 2 shown coating solution obtained above has been coated in to the contact angle of measuring water droplet (3 microlitre) after glass surface in air, and the surperficial contact angle of the film that water forms at coating solution is greater than 170 °.
Embodiment 2.
(1) under room temperature, in 2L round-bottomed flask, adding 150g fibre length is titanium dioxide nanofiber, the Kynoar of 250g and the toluene of 100g of 600nm, and magnetic agitation mixes, and obtains coating solution;
(2) commercial liquid-transfering gun rifle head is dipped in the coating solution that step (1) obtains, keep 5 minutes, slowly pull out and be dried, the film that is compounded to form by Kynoar and titanium dioxide nanofiber in the finishing of liquid-transfering gun rifle head (width of film be 200 μ m); And there is the raised structures of the nano-scale being compounded to form by Kynoar and titanium dioxide nanofiber on the surface of described film, obtain thus having the liquid-transfering gun rifle head of super-hydrophobicity.
Embodiment 3.
(1) under room temperature, in 2L round-bottomed flask, adding 150g fibre length is the titanium dioxide nanofiber of 800nm, the toluene of fluoridizing polyisobutene and 100g of 250g, and magnetic agitation mixes, and obtains coating solution;
(2) commercial liquid-transfering gun rifle head is dipped in the coating solution that step (1) obtains, keeps 5 minutes, slowly pull out and be dried, in the finishing of liquid-transfering gun rifle head by the film of fluoridizing polyisobutene and titanium dioxide nanofiber and being compounded to form; And have on the surface of described film by the raised structures of fluoridizing the nano-scale that polyisobutene and titanium dioxide nanofiber be compounded to form, obtain thus having the liquid-transfering gun rifle head of super-hydrophobicity.
Embodiment 4.
(1) under room temperature, in 2L round-bottomed flask, adding 100g fibre length is the carbon nano-fiber of 100nm, the toluene of fluoridizing polyisobutene and 300g of 100g, and magnetic agitation mixes, and obtains coating solution;
(2) commercial liquid-transfering gun rifle head is dipped in the coating solution that step (1) obtains, keeps 5 minutes, slowly pull out and be dried, in the finishing of liquid-transfering gun rifle head by the film of fluoridizing polyisobutene and carbon nano-fiber and being compounded to form; And have on the surface of described film by the raised structures of fluoridizing the nano-scale that polyisobutene and carbon nano-fiber be compounded to form, obtain thus having the liquid-transfering gun rifle head of super-hydrophobicity.
Embodiment 5.
(1) under room temperature, in 2L round-bottomed flask, adding 200g fibre length is carbon nano-fiber, the polytetrafluoroethylene (PTFE) of 100g and the toluene of 300g of 1 μ m, and magnetic agitation mixes, and obtains coating solution;
(2) commercial liquid-transfering gun rifle head is dipped in the coating solution that step (1) obtains, keeps 5 minutes, slowly pull out and be dried, the film being compounded to form by polytetrafluoroethylene (PTFE) and carbon nano-fiber in the finishing of liquid-transfering gun rifle head; And there is the raised structures of the nano-scale being compounded to form by polytetrafluoroethylene (PTFE) and carbon nano-fiber on the surface of described film, obtain thus having the liquid-transfering gun rifle head of super-hydrophobicity.
Embodiment 6.
(1) under room temperature, in 2L round-bottomed flask, adding 200g fibre length is titanium dioxide nanofiber, the polytetrafluoroethylene (PTFE) of 150g and the toluene of 250g of 1 μ m, and magnetic agitation mixes, and obtains coating solution;
(2) commercial liquid-transfering gun rifle head is dipped in the coating solution that step (1) obtains, keeps 5 minutes, slowly pull out and be dried, the film being compounded to form by polytetrafluoroethylene (PTFE) and titanium dioxide nanofiber in the finishing of liquid-transfering gun rifle head; And there is the raised structures of the nano-scale being compounded to form by polytetrafluoroethylene (PTFE) and titanium dioxide nanofiber on the surface of described film, obtain thus having the liquid-transfering gun rifle head of super-hydrophobicity.
Claims (10)
1. one kind has the liquid-transfering gun rifle head of super-hydrophobicity, it is characterized in that: the finishing at liquid-transfering gun rifle head has the film being compounded to form by fluorinated polymer and inorganic nano-fiber, and have the raised structures of the nano-scale being compounded to form by described fluorinated polymer and described inorganic nano-fiber on the surface of described film.
2. the liquid-transfering gun rifle head with super-hydrophobicity according to claim 1, is characterized in that: the fluorinated polymer in the film that described fluorinated polymer and inorganic nano-fiber are compounded to form and the weight ratio of inorganic nano-fiber are 1:1~5:3.
3. the liquid-transfering gun rifle head with super-hydrophobicity according to claim 1 and 2, is characterized in that: described fluorinated polymer is selected from fluorinated polypropylene, Kynoar, fluoridizes polyisobutene, one in polytetrafluoroethylene (PTFE).
4. the liquid-transfering gun rifle head with super-hydrophobicity according to claim 1 and 2, is characterized in that: described inorganic nano-fiber is selected from the one in carbon nano-fiber, zinc oxide nano fiber, titanium dioxide nanofiber.
5. the liquid-transfering gun rifle head with super-hydrophobicity according to claim 4, is characterized in that: the fibre length of described carbon nano-fiber, zinc oxide nano fiber, titanium dioxide nanofiber is all 100nm to 2 μ m.
6. according to a preparation method for the liquid-transfering gun rifle head with super-hydrophobicity described in claim 1~5 any one, it is characterized in that, described preparation method comprises the following steps:
(1) at room temperature, fluorinated polymer is mixed with inorganic nano-fiber and organic solvent, stir, obtain the coating solution that contains fluorinated polymer and inorganic nano-fiber; Wherein, the content of the inorganic nano-fiber in coating solution is that the content of 5~30wt%, fluorinated polymer is that 5~50wt%, surplus are organic solvent;
(2) liquid-transfering gun rifle head is dipped in the coating solution that step (1) obtains, pull out and be dried, the film being compounded to form by fluorinated polymer and inorganic nano-fiber in the finishing of liquid-transfering gun rifle head, and there is the raised structures of the nano-scale being compounded to form by described fluorinated polymer and described inorganic nano-fiber on the surface of described film, obtain having the liquid-transfering gun rifle head of super-hydrophobicity.
7. preparation method according to claim 6.It is characterized in that, described organic solvent is selected from the one in methyl alcohol, ethanol, propyl alcohol, butanols, acetone, butanone, pentane, n-hexane, normal heptane, normal octane, benzene, toluene, oxolane, carbon disulfide.
8. one kind for the preparation of the coating solution of liquid-transfering gun rifle head with super-hydrophobicity, it is characterized in that: described coating solution is made up of fluorinated polymer and inorganic nano-fiber and organic solvent, wherein: the content of inorganic nano-fiber is that the content of 5~30wt%, fluorinated polymer is that 5~50wt%, surplus are organic solvent.
9. coating solution according to claim 8, is characterized in that: described polymer is selected from fluorinated polypropylene, Kynoar, fluoridizes polyisobutene, one in polytetrafluoroethylene (PTFE);
Described inorganic nano-fiber is selected from the one in carbon nano-fiber, zinc oxide nano fiber, titanium dioxide nanofiber.
10. coating solution according to claim 9, is characterized in that: the fibre length of described carbon nano-fiber, zinc oxide nano fiber, titanium dioxide nanofiber is all 100nm to 2 μ m.
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CN106984194A (en) * | 2017-04-25 | 2017-07-28 | 浙江大学 | A kind of modifying super hydrophobicity nano fibrous membrane and its preparation method and application |
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CN109354771A (en) * | 2018-10-25 | 2019-02-19 | 嘉兴齐越医疗器械有限公司 | Filling-modified PP material and its application |
CN110180613A (en) * | 2019-06-27 | 2019-08-30 | 电子科技大学 | A kind of liquid-transfering gun based on surface charge |
CN110180613B (en) * | 2019-06-27 | 2020-02-14 | 电子科技大学 | Liquid-transfering gun based on surface charge |
CN110787845A (en) * | 2019-11-04 | 2020-02-14 | 苏州大学 | Liquid droplet tweezers and liquid droplet control method |
CN110787845B (en) * | 2019-11-04 | 2022-05-20 | 苏州大学 | Liquid droplet tweezers and liquid droplet control method |
CN112827533A (en) * | 2021-01-08 | 2021-05-25 | 青岛大学 | Desktop type micro-droplet chemical reaction experiment platform based on super-hydrophobic material |
CN112827533B (en) * | 2021-01-08 | 2022-03-08 | 青岛大学 | Desktop type micro-droplet chemical reaction experiment platform based on super-hydrophobic material |
CN112940397A (en) * | 2021-04-09 | 2021-06-11 | 武汉赛维尔生物科技有限公司 | Hydrophobic additive, hydrophobic composite material, preparation method and application thereof |
CN113801360A (en) * | 2021-11-18 | 2021-12-17 | 赛宁(苏州)生物科技有限公司 | Surface treatment method for realizing low-adsorption plastic liquid-transfer suction head |
CN113801360B (en) * | 2021-11-18 | 2022-03-04 | 赛宁(苏州)生物科技有限公司 | Surface treatment method for realizing low-adsorption plastic liquid-transfer suction head |
CN115403810A (en) * | 2022-09-29 | 2022-11-29 | 浙江首康生物科技有限公司 | High-oleophobic pipette head and preparation method thereof |
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