CN1195214C - Method for forming nano air bubble on hydrophilic plain surface based on alcohol water replacement - Google Patents
Method for forming nano air bubble on hydrophilic plain surface based on alcohol water replacement Download PDFInfo
- Publication number
- CN1195214C CN1195214C CN 03115380 CN03115380A CN1195214C CN 1195214 C CN1195214 C CN 1195214C CN 03115380 CN03115380 CN 03115380 CN 03115380 A CN03115380 A CN 03115380A CN 1195214 C CN1195214 C CN 1195214C
- Authority
- CN
- China
- Prior art keywords
- water
- liquid bath
- needle point
- nano bubble
- alcohol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The present invention relates to a method for forming nanobubbles on a flat hydrophilic plane based on water-alcohol replacement. Hydrophilic, atomically flat mica is used as a substrate, the temperatures of liquid are all above 15 DEG C and below 40 DEG C, alcohol is injected first, and then water is injected, the nanobubbles are formed on the interface of the substrate and the water by using the replacement process of the alcohol and the water. In the present invention, the nanobubbles can be formed on the flat hydrophilic plane because the replacement of the alcohol (comprises methanol, ethanol, n-propanol, isopropanol and tert-butyl alcohol) which can be dissolved in the water and the water is used. The method is easy and convenient to operate, and pollution can not be introduced; the method has very good repeatability, is suitable for an AFM to observe the nanobubbles, and can be used as a basis for deeply and systematically researching the nanobubbles.
Description
Technical field:
The present invention relates to a kind ofly replace in method hydrophilic, that even curface forms nano bubble based on pure water, specifically, be a kind of on mica substrate, can form the method for nano bubble after being replaced by water with the alcohol (comprising methyl alcohol, ethanol, n-propanol, isopropyl alcohol and the tert-butyl alcohol) that water dissolves each other on the interface of substrate and water, the nano bubble that belongs to solid-liquid interface in the physical chemistry forms technical field.
Background technology:
No matter in the fundamental research field or in application branch of learning, the nano bubble of solid-liquid interface all is a problem that receives much attention.According to classical thermodynamics, the volume of bubble is more little, and pressure inside is just big more, and the big bubble that must cause of pressure breaks.In theory, nano bubble can not stable existence in the water under the room temperature.But have several seminar to observe directly the nano bubble of solid-liquid interface with atomic force microscope (AFM) in recent years, this existence for nano bubble provides evidence.Because the nano bubble size is little very easily destroyed again, be difficult to arrive with optical means and contact instrument visual inspection.The advantage of atomic force microscope is can be in imaging under the solution state, and obtains nano level resolution.Therefore especially the pattern of rapping of AFM is very suitable for the research of soft sample, is the powerful measure of surveying the solid-liquid interface nano bubble at present.
The existence of nano bubble has caused the very big concern of physical chemistry, Surface Science, colloidal chemistry and other subject after obtaining proof.The nano bubble of solid-liquid interface may be relevant with effect with a lot of phenomenons, to the viscous effect of motion solid, the gathering of solid-liquid interface, the flotation and the sedimentation of micelle, even all there is confidential relation the aspects such as stability of protein structure as the interaction between colloidal particle and solid surface, moistened surface, surface adhesion, liquid.Want system, in depth study nano bubble, must set up a kind of easy, repeatable strong method formation nano bubble earlier.Except that this group, nano bubble (J.W.G., Yyrrell and P.Attard, Phys.Rev.Lett.2001 directly study on water-immersed chemical modification surface in other seminar at present; 87, P176104.N.Ishida, M.Sakamoto, M.Miyara andK.Higashitani, Langmuir 2000; 16, P5681.).The surface of this chemical modification is subjected to the influence of concrete modification, must cause the inhomogeneity of surface physics or chemical property, a large amount of gases that this heterogeneity surface is easy to adsorb in air.These adsorbed gases make may not carry out quantitative examination to the nano bubble of solid-liquid interface, and, also can't realize the repeatability of result of study.Also have cavitation phenomenon at hydrophobic surface, this makes systematically, in depth studies nano bubble and seems difficult more.
Hydrophilic, smooth solid surface can not adsorb a large amount of gases from air, the steam that does not yet have cavitation phenomenon to produce.With this surface is that substrate research nano bubble can be avoided this two kinds of uncertainties that factor causes.But in theory, hydrophilic, even curface is can not adsorb bubble.Therefore, it is significant for the research of nano bubble to set up on a kind of surface hydrophilic, atomically flating the method that forms nano bubble.
This group adopts pure water to replace formation nano bubble (S.T.Lou, Z.Q.Ouyang, Y.Zhang, X.J.Li, J.Hu, M.Q.Li and F.J.Yang, J.Vac.Sci.Technol.B, 2000 early stage; 18, P2573.S.T.Lou, J.X.Gao, X.D.Xiao, G.L.Li, Y.Zhang, M.Q.Li, J.L.Sun, J.Hu, Chin.Phys.2001,10 (Suppl) P1009.S.T.Lou, J.X.Gao, X.D.Xiao, X.J.Li, G.L.Li, Y.Zhang, M.Q.Li, J.L.Sun, X.H.Li and J.Hu, Mater.Charact.2002; 48, P211), but do not have the controlling liquid temperature, and usefulness is that 5% ethanolic solution is replaced ethanol, therefore can't form nano bubble in repeated highland.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art, a kind of method that forms nano bubble at hydrophilic even curface is provided.This method is suitable for atomic force microscope AFM nano bubble being observed, and is easy and simple to handle, can not introduce pollution, and has fine reappearance, can be used as the basis of nano bubble being goed deep into systematic study.
For realizing such purpose, it is substrate that the present invention adopts mica hydrophilic, atomically flating, injects earlier the alcohol water that reinjects, and utilizes the replacement process of alcohol and water, forms nano bubble on the interface of substrate and water.
The present invention specifically comprises the steps:
(1) preparation of instrument
Atomic force microscope is that (Digital Instruments Inc.), is equipped with O-circle and liquid bath in NanoScope IIIa SPM system." E " scanner head; Elasticity coefficient is the common NP needle point about 0.58N/m.Needle point water, ethanol and acetone before use cleans.The temperature of liquid is all more than 15 ℃, below 40 ℃.
(2) preparation of substrate
The present invention adopts mica hydrophilic, atomically flating as substrate.Mica is cut into about 12mm * 12mm; With double faced adhesive tape it is bonded on the iron plate of AFM special use, with tweezers its surperficial one deck is thrown off gently again.Blow the ear ball blow away the surface chip after, be put into the AFM head.The liquid bath that installs needle point, O-circle and rising pipe is put on the mica substrate of AFM head, fixes.
(3) form nano bubble
Water inlet pipe by connecing liquid bath injects liquid bath gently with the absolute ethyl alcohol (top grade is pure) of syringe about with 2ml, clips the inlet tube and outlet tube of liquid bath, convergence needle point, imaging.Determine that mica surface does not have tangible bulky grain in ethanol, can't distinguish after preventing may be the particle of pollution and the nano bubble of formation.
After imaging is finished, lift needle point.Take off water inlet pipe, suck ultrapure water (Milli Q).When on liquid bath, injecting water pipe, open rising pipe gently.Ultrapure water about 5ml is injected liquid bath gently, discharge ethanol wherein.
(4) observation of nano bubble
Drive nearly needle point, rap driving frequency (drive frequency) 7-12KHz of pattern, driving amplitude (drive amplitude) 250-280mV, sweep speed (scan rate) 2Hz, scan area (scansize) 2um * 2um to 5um * 5um.When selecting the set point (setpoint) of AFM imaging, do the force curve of mica surface earlier.The value of set point should be lower than the position that force curve begins to descend slightly.
The substrate that the present invention adopts comprises and the contact angle of the water surfaces less than 90 degree, silicon, glass arranged and through the surface of chemistry or physical modification.
The alcohols that the present invention selects for use is except that ethanol, and these also can be replaced methyl alcohol, n-propanol, isopropyl alcohol and the tert-butyl alcohol by water by identical method with the alcohols that water dissolves each other, and forms nano bubble at mica surface.
Of the present invention is the alcohol and water of handling without the degassing.
The present invention has been owing to utilized the replacement process of alcohol and water, can form nano bubble at hydrophilic, even curface.This method has fine reappearance, and is easy and simple to handle, can not introduce pollution, be to nano bubble deeply, the basis of systematic study.
Embodiment:
Below by concrete example method of the present invention is further described.
Embodiment 1: temperature is to forming the influence of nano bubble
Atomic force microscope is that (Digital Instruments Inc.), is equipped with O-circle and liquid bath in NanoScope IIIa SPM system." E " scanner head; Elasticity coefficient is the common NP needle point about 0.58N/m.Needle point cleans with ethanol and acetone before use.Water is the Millipore ultrapure water, and ethanol is that top grade is pure, purchases in Chinese chemical reagent main office.
Dark-coloured mica is sheared by the iron plate size; With double faced adhesive tape it is bonded on the iron plate.Throw off mica surface one deck with tweezers, blow the chip that the ear ball is blown away the surface, be put into the AFM head.Adjust head position, make needle point apart from the about 40um of mica surface, the liquid bath that installs needle point, O-circle and rising pipe is put on the mica substrate of AFM head, fixes.
Water inlet pipe by liquid bath will be incubated in 20 ℃ 2ml ethanol with syringe and inject liquid bath gently, clip the inlet tube and outlet tube of liquid bath, convergence needle point, imaging.Do not observe tangible larger particles.Lift needle point 5-10 micron, take off water inlet pipe, suction is incubated in 20 ℃ ultrapure water.When on liquid bath, injecting water pipe, open rising pipe gently.Ultrapure water about 5ml is injected liquid bath gently, discharge ethanol wherein.Drive nearly needle point, rap driving frequency (drive frequency) 7.2KHz of pattern, driving amplitude (driveamplitude) 280mV, sweep speed (scan rate) 2Hz, scan area (scan size) 2um * 2um determines setpoint according to force curve.Can observe mica surface has some nano bubbles, the statistics bubble quantity and bubble.
As a comparison, by above-mentioned same quadrat method, inject earlier and be incubated in 35 ℃ ethanol, reinjecting is incubated water in 35 ℃.The AFM imaging can be observed more nano bubble, statistical magnitude.The result can determine that the quantity of 35 ℃ second alcohol and water replacement formation nano bubble is far longer than the quantity of 20 ℃ second alcohol and water replacement formation nano bubble, therefore in the temperature range that the present invention limited, the liquid of higher temperature can more help the formation of nano bubble.
Embodiment 2: gas source determines in the nano bubble
Atomic force microscope is that (Digital Instruments Inc.), is equipped with O-circle and liquid bath in NanoScope IIIa SPM system." E " scanner head; Elasticity coefficient is the common NP needle point about 0.58N/m.Needle point cleans with ethanol and acetone before use.The power of used vacuum oil pump is 500W.Water is the Millipore ultrapure water, and ethanol is that top grade is pure, purchases in Chinese chemical reagent main office.The temperature of liquid is more than 15 ℃, below 40 ℃.
Dark-coloured mica is sheared by the iron plate size; With double faced adhesive tape it is bonded on the iron plate.Throw off mica surface one deck with tweezers, blow the chip that the ear ball is blown away the surface, be put into the AFM head.Adjust head position, make needle point apart from the about 40um of mica surface, the liquid bath that installs needle point, O-circle and rising pipe is put on the mica substrate of AFM head, fixes.
Ethanol and water are contained in respectively in the two-neck bottle, and bottle one end seals with plug, and the other end connects the vacuum oil pump by piston, and the final vacuum Du Keda-0.07MPa that bleeds keeps liquid 30 minutes under this vacuum tightness.After the degassing, the ethanol with the about 5ml degassing of syringe sucking-off is injected into liquid bath rapidly, clips inlet tube and outlet tube.The rapid more about 5ml de aerated water of sucking-off injecting water pipe on liquid bath when, is opened rising pipe gently, and water is injected liquid bath, discharges ethanol.Clip inlet tube and outlet tube immediately.Drive nearly needle point, imaging.Quantity to nano bubble on the unit area among the result is added up.Same experiment repeats to make the distributed number figure of nano bubble after 5-8 time.Same quadrat method, the distributed number figure of nano bubble is made in the experiment of the second alcohol and water that repeats not outgas.The second alcohol and water replacement that can see the degassing significantly forms nano bubble quantity well below the second alcohol and water that does not outgas.Can determine that like this gas source in the nano bubble is exactly a dissolved gases in the second alcohol and water.
The result's that will experimentize respectively in two researchs contrast and statistics, this is to be difficult to realize directly immersing on the surface that chemical drains is modified in the water.Alcohol and water is replaced and can be formed nano bubble at hydrophilic, smooth mica surface, and it is repeatable preferably to make experimental result have.Contrast, statistical experiment result, such two researchs have all obtained clear and definite result.
Claims (1)
1, a kind of based on the method for pure water replacement at hydrophilic even curface formation nano bubble, it is characterized in that comprising:
1) temperature of liquid is more than 15 ℃, below 40 ℃;
2) mica hydrophilic, atomically flating is adopted in substrate, mica is cut into 12mm * 12mm, be bonded on the iron plate that the atomic force microscope imaging uses, again mica surface one deck is thrown off gently, after blowing away surface debris, be put into the atomic force microscope head, the liquid bath that installs needle point, O-circle and rising pipe is put in the described substrate fixes;
3) with syringe absolute ethyl alcohol is injected liquid bath gently by the water inlet pipe that connects liquid bath, clip the inlet tube and outlet tube that connects liquid bath, the convergence needle point after imaging is finished, lifts needle point, take off water inlet pipe, suck ultrapure water, when on liquid bath, injecting water pipe, open rising pipe gently, ultrapure water is injected liquid bath gently, discharge ethanol wherein;
4) drive nearly needle point, rap the driving frequency 7-12KHz of pattern, driving amplitude 250-280mV, sweep speed 2Hz, scan area 2 μ m * 2 μ m to 5 μ m * 5 μ m observe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03115380 CN1195214C (en) | 2003-02-13 | 2003-02-13 | Method for forming nano air bubble on hydrophilic plain surface based on alcohol water replacement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03115380 CN1195214C (en) | 2003-02-13 | 2003-02-13 | Method for forming nano air bubble on hydrophilic plain surface based on alcohol water replacement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1434281A CN1434281A (en) | 2003-08-06 |
| CN1195214C true CN1195214C (en) | 2005-03-30 |
Family
ID=27634245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03115380 Expired - Fee Related CN1195214C (en) | 2003-02-13 | 2003-02-13 | Method for forming nano air bubble on hydrophilic plain surface based on alcohol water replacement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1195214C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1987414B (en) * | 2005-12-21 | 2011-04-20 | 中国科学院上海应用物理研究所 | Method for growing nano grade air bubbles and its observation and control device and method |
| CN1986894B (en) * | 2005-12-21 | 2011-06-15 | 中国科学院上海应用物理研究所 | Integrated hydrogen producing and storing process and apparatus |
| JP6041897B2 (en) * | 2012-11-30 | 2016-12-14 | 中国塗料株式会社 | Paint composition used for ship with reduced frictional resistance utilizing gas lubrication function in water, coating film formed from the composition, ship coated with the coating film, method for manufacturing the ship, and reduction of frictional resistance Method for predicting effect, apparatus used for predicting frictional resistance reduction effect, and frictional resistance reducing system used for frictional resistance-reducing ship |
| US10219670B2 (en) | 2014-09-05 | 2019-03-05 | Tennant Company | Systems and methods for supplying treatment liquids having nanobubbles |
| CN113769599B (en) * | 2021-08-30 | 2022-12-16 | 扬州大学 | Method for quickly and simply preparing nano bubbles |
| CN114797685B (en) * | 2022-05-10 | 2023-03-14 | 清华大学 | Method for generating bubbles on surface of hydrophilic material |
-
2003
- 2003-02-13 CN CN 03115380 patent/CN1195214C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1434281A (en) | 2003-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1195214C (en) | Method for forming nano air bubble on hydrophilic plain surface based on alcohol water replacement | |
| Soeno et al. | Ultra-water-repellent surface: fabrication of complicated structure of SiO2 nanoparticles by electrostatic self-assembled films | |
| CN105778145B (en) | The preparation method of large-area ordered porous membrane | |
| CN110128685B (en) | Solution self-assembly method of large-area high-quality monolayer PS microsphere film | |
| CN1246681C (en) | Method for forming nano gas layer on pyrolytic graphite surface based on alcohol-water substitution | |
| Dong et al. | Self-assembly of Fmoc-amino acids in capillary confined space forming a parallel ordered fiber network for application in vascularization | |
| CN107587121B (en) | The preparation method of DLC film and eyeglass | |
| Ruan et al. | Investigation on the effect of fiber wettability on water absorption kinetics of geopolymer composites | |
| Lee et al. | Mimicking a superhydrophobic insect wing by argon and oxygen ion beam treatment on polytetrafluoroethylene film | |
| CN2630837Y (en) | Apparatus for forming nano air bubble o nmica surface based on alcohol-water substitution | |
| CN111423581B (en) | Preparation method of hierarchical-structure super-hydrophobic surface assisted by dopamine | |
| CN111825985A (en) | Flexible film of bionic air cavity structure and preparation method thereof | |
| CN110227350A (en) | A kind of application of the modified PVDF ultrafiltration membrane of attapulgite in protein solution filtration | |
| CN110479218B (en) | Method for preparing super-hydrophobic super-oleophylic aerogel material by taking nano-cellulose and nano-particles as raw materials | |
| Yin et al. | Postgrowth processing of carbon nanotube arrays-enabling new functionalities and applications | |
| CN110106488A (en) | A kind of preparation method of flower-shaped hierarchical structure Au@Ag nanometer sheet oldered array | |
| KR100678727B1 (en) | A diamond shell fabricated by using porous particle and the fabrication method thereof | |
| Tohnishi et al. | Surface treatment of polydimethylsiloxane and glass using solid-source H2O plasma for fabrication of microfluidic devices | |
| CN114436206A (en) | Method for adjusting ordered arrangement of single-layer nano microsphere array by adopting continuous sound waves | |
| Grogan | The nanoaquarium: A nanofluidic platform for in situ transmission electron microscopy in liquid media | |
| Thapoung et al. | The effects of concentrations of ZnO nanoparticles on dewetting suppression of PS thin films | |
| Lama et al. | The physics of drying of colloidal dispersion: Pattern formation and desiccation cracks | |
| Teshima et al. | Influence of surface wettability and nanostructure on the generation of interfacial nanobubbles | |
| CN115569530B (en) | Preparation method of blending nano composite film based on evaporation driving | |
| CN113526693B (en) | Method for generating nano bubbles in water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050330 Termination date: 20140213 |