CN103744446B - The control method utilizing temperature variation to make droplet collision state to change - Google Patents
The control method utilizing temperature variation to make droplet collision state to change Download PDFInfo
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- CN103744446B CN103744446B CN201410012100.6A CN201410012100A CN103744446B CN 103744446 B CN103744446 B CN 103744446B CN 201410012100 A CN201410012100 A CN 201410012100A CN 103744446 B CN103744446 B CN 103744446B
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Abstract
The present invention relates to a kind of control method utilizing temperature variation to make droplet collision state to change, heat or cool the temperature of waiting to collide drop, the drop that should mutually flick can be made to become easy polymerization when drop temperature raises, the drop that should mutually be polymerized can be made to become when drop temperature reduces and easily flick.Compared with prior art, the present invention can apply in fields such as such as inkjet printing, surface spraying, oil jetting combustions, improve industrial quality and usefulness, meanwhile also can provide technical support in micro-fluidic, micro-manufacture, the contour frontier application of micro-biochemical reaction.
Description
Technical field
The invention belongs to physics applied technical field, by utilizing collision status to the temperature control break drop of drop in gaseous environment, reaching and improving product quality, improve the energy utilization factor and micro-fluidic, micro-manufacture, the object of the contour frontier application of micro-biochemical reaction.
Background technology
The collision status problem of drop is the major issue paid close attention in the life of people's commercial production always.If such as in the process of inkjet printing prepared Chinese ink drop do not form that good fusion can cause printing on paper image blurring unclear, thus cause the loss of information; If for another example in Electronic Packaging process the copper drop of plating occur flicking or not well fusion can cause the uneven of copper cash or even produce breakpoint, harm is greatly produced to product; And for example in the process of oil jetting combustion, the collision of oil droplet has a significant impact burning efficiency, and controlling rational collision status effectively can improve burning efficiency, improves energy utilization rate.
Existing control device is all change its collision status by the impact velocity of drop and collision angle, but impact velocity and collision angle not necessarily can be utilized merely to change the collision status of drop in the commercial production life of reality, and the difference of temperature is prevalent in the middle of these productive lifes, the collision status reasonably utilizing temperature variation to change drop effectively can improve production technology, Improving The Quality of Products, improves energy utilization rate.The collision status simultaneously utilizing temperature variation to change drop can be also micro-fluidic effectively, and micro-manufacture, the contour frontier of micro-biochemical reaction provides technical support.
Summary of the invention
Object of the present invention is exactly provide a kind of control method utilizing temperature variation to make droplet collision state to change to overcome defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions: a kind of control method utilizing temperature variation to make droplet collision state to change, it is characterized in that, heat or cool the gaseous environment temperature of waiting to collide drop place, the drop that should mutually flick can be made to become easy polymerization when drop temperature raises, the drop that should mutually be polymerized can be made to become when drop temperature reduces and easily flick.
Described waits that the gaseous environment colliding drop place is for being placed in solid surface by band collision drop, and described solid surface is metal surface, inorganic non-metallic surface, polymer surfaces or composite surface, and heating or cooling solid surface change gaseous environment temperature.
Described waits that the gaseous environment colliding drop place is pure gaseous environment, comprises air, nitrogen, hydrogen; Heat or cool the temperature that the container that gas is housed controls to be placed in the drop of this gas.
The collision that the collision of described drop can be dual drop also can be the collision of many drops.
Shifting gears as the heat trnasfer of directly heating or cooling, photothermal conversion, electric heating transform the mode of multiple change drop temperature of described drop temperature.
The temperature of described drop raises the rising for single or multiple drop temperature arbitrarily.
Described drop comprises the single-phase or heterogeneous drop of many kinds of substance mixing in water droplet, organic liquid phase drop, molten drop and solution droplets, emulsion drop, suspension drop.
Described organic liquid phase drop comprises toluene, ethanol or alkanes; Described molten drop comprises copper, iron or aluminium.
The probability that described easy polymerization shows as polymerization increases, and also shows the time shorten of polymerization.
Compared with prior art, the present invention has following advantage:
(1) simple control temperature change can change the collision status of drop.
(2) introducing of temperature can make some irrealizable micro-manufactures originally, and micro-biochemical reaction etc. become possibility.
(3) temperature increase can accelerate droplet coalescence speed, is conducive to improving product quality.
Accompanying drawing explanation
Fig. 1 is that super hydrophobic surface top is met and discussed droplet collision polymerization probability and the graph of a relation of temperature.
Fig. 2 is the high-speed camera picture that super hydrophobic surface top is met and discussed under droplet collision different temperatures.
Embodiment
Below in conjunction with concrete case study on implementation, be that the super hydrophobic surface drop head of substrate meets and discusses that the invention will be further described for example in collision with silicon chip.
Embodiment 1
Be that on the super hydrophobic surface of 154 °, a drop is fixed on its super hydrophobic surface at contact angle, another drop from directly over drippage, two drops are all 25 DEG C, and when the relative velocity of drop is 0.3m/s, its probability mutually flicked is 34%.Under identical relative velocity, if by the temperature increase of wherein top drop, the probability of polymerization of fluid drops can improve rapidly, and when the temperature of top drop is 27 DEG C, 30 DEG C, when 32 DEG C, probability of its polymerization is 58%, 80%, 90%.When temperature is elevated to 35 DEG C, it can absolutely condense together.In order to highlight the impact of temperature variation on droplet collision, carry out another group experiment.The temperature simultaneously improving two drops is 27 DEG C, 30 DEG C, and when 32 DEG C, the probability of its polymerization is 66%, 96%, 96%, and when temperature is elevated to 35 DEG C, it can absolutely condense together.As shown in Figure 1.
Embodiment 2
Be on the super hydrophobic surface of 154 ° at contact angle, a drop is fixed on its super hydrophobic surface, another drop from directly over drippage, when the drop being fixed on super hydrophobic surface is 25 DEG C, the drop temperature of top is respectively 25 DEG C, 40 DEG C, when 50 DEG C, its time of fusion can significantly shorten, and is reduced to 0 to 3 milliseconds from 12 to 15 milliseconds.As shown in Figure 2.
Claims (7)
1. the control method utilizing temperature variation to make droplet collision state to change, it is characterized in that, heat or cool the temperature of waiting to collide drop, the drop that should mutually flick can be made to become easy polymerization when drop temperature raises, the drop that should mutually be polymerized can be made to become when drop temperature reduces and easily flick;
Described waits that the gaseous environment colliding drop place will be for treating that collision drop is placed in solid surface, and described solid surface is metal surface, inorganic non-metallic surface, polymer surfaces or composite surface, and heating or cooling solid surface change gaseous environment temperature;
Described waits that the gaseous environment colliding drop place is pure gaseous environment, comprises air, nitrogen, hydrogen; Heat or cool the temperature that the container that gas is housed controls to be placed in the drop of this gas.
2. a kind of control method utilizing temperature variation to make droplet collision state to change according to claim 1, is characterized in that, the collision that the collision of described drop can be dual drop also can be the collision of many drops.
3. a kind of control method utilizing temperature variation to make droplet collision state to change according to claim 1, it is characterized in that, shifting gears as the heat trnasfer of directly heating or cooling, photothermal conversion, electric heating transform the mode of multiple change drop temperature of described drop temperature.
4. a kind of control method utilizing temperature variation to make droplet collision state to change according to claim 1, is characterized in that, the temperature of described drop raises the rising for single or multiple drop temperature arbitrarily.
5. a kind of control method utilizing temperature variation to make droplet collision state to change according to claim 1, it is characterized in that, described drop comprises the single-phase or heterogeneous drop of many kinds of substance mixing in water droplet, organic liquid phase drop, molten drop and solution droplets, emulsion drop, suspension drop.
6. a kind of control method utilizing temperature variation to make droplet collision state to change according to claim 5, it is characterized in that, described organic liquid phase drop comprises toluene, ethanol or alkanes; Described molten drop comprises copper, iron or aluminium.
7. a kind of control method utilizing temperature variation to make droplet collision state to change according to claim 1, is characterized in that, the probability that described easy polymerization shows as polymerization increases, and also shows the time shorten of polymerization.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410012100.6A CN103744446B (en) | 2014-01-10 | 2014-01-10 | The control method utilizing temperature variation to make droplet collision state to change |
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| CN201410012100.6A CN103744446B (en) | 2014-01-10 | 2014-01-10 | The control method utilizing temperature variation to make droplet collision state to change |
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| CN103744446A CN103744446A (en) | 2014-04-23 |
| CN103744446B true CN103744446B (en) | 2016-04-06 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2058130A1 (en) * | 2007-11-09 | 2009-05-13 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | Droplet selection mechanism |
| CN102304236A (en) * | 2011-07-08 | 2012-01-04 | 唐东波 | Emulsion antioxygen and preparation method thereof |
| CN103459157A (en) * | 2011-02-11 | 2013-12-18 | 马肯依玛士公司 | New method for stimulation range detection in continuous ink jet printer |
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2014
- 2014-01-10 CN CN201410012100.6A patent/CN103744446B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2058130A1 (en) * | 2007-11-09 | 2009-05-13 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | Droplet selection mechanism |
| CN103459157A (en) * | 2011-02-11 | 2013-12-18 | 马肯依玛士公司 | New method for stimulation range detection in continuous ink jet printer |
| CN102304236A (en) * | 2011-07-08 | 2012-01-04 | 唐东波 | Emulsion antioxygen and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| "循环流化床制取流体冰种液滴碰撞—聚并实验研究";彭正标，等;《东南大学学报（自然科学版）》;20070930;第37卷(第5期);第827页、第829页右栏—第831页右栏 * |
| "激波对液滴碰撞的影响分析";薛社生，等;《爆炸与冲击》;20131231;全文 * |
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