CN104212180A - Polydimethylsiloxane with magnetism and preparation method thereof - Google Patents
Polydimethylsiloxane with magnetism and preparation method thereof Download PDFInfo
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- CN104212180A CN104212180A CN201410482967.8A CN201410482967A CN104212180A CN 104212180 A CN104212180 A CN 104212180A CN 201410482967 A CN201410482967 A CN 201410482967A CN 104212180 A CN104212180 A CN 104212180A
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Abstract
The invention discloses polydimethylsiloxane (PDMS) with magnetism and a preparation method thereof. In a process of preparing the PDMS, a nano magnetic particle is added to prepare the magnetic PDMS with high magnetic conductivity. The polydimethylsiloxane with the magnetism has magnetism while being externally applied with magnetic fields, can be attracted by a magnet, can be used for preparing some movable structures such as a microchannel throttle valve and a magnetic drive pump in a micro-fluidic chip.
Description
Technical field
The present invention relates to the preparation method of polydimethyl siloxane material, particularly relate to the preparation method of the magnetic polydimethyl siloxane material of a kind of tool.
Background technology
Polydimethylsiloxane (PDMS) because of its cost low, using simple, with having good adhesivity between silicon chip, there is the features such as good unreactiveness, becoming a kind of polymer materials being widely used in the field such as micro-fluidic, is the main raw making microfluidic chip structure.After the synthesis of traditional PD MS mixes with suitable proportion with solidifying agent by the host containing polydimethylsiloxane usually in the lab, the mode vacuumized is utilized to make the bubble floating in mixed solution to surface and break, then the liquid PDMS after pouring bubble removing on the silicon wafer mould designing Micro Channel Architecture, then putting into thermostat container heating (difference of temperature and time parameter will produce the PDMS of different hardness) makes it solidify, finally the PDMS after solidification is shifted out from silicon wafer, Micro Channel Architecture on silicon wafer just can print on PDMS after hardening, forever can fit with glass after being carried out plasma cleaning process, the micro-fluidic chip with certain certain microfluidic road structure is after laminating.
Current PDMS can only make static microfluidic chip structure, and can not creative activity structure, compared with current PDMS, the magnetic PDMS that method of the present invention prepares has magnetic when additional the action of a magnetic field, some bascule in micro-fluidic chip can be prepared, as the activity in the throttling valve of microchannel is dammed the active units etc. in unit, magnet pump.
Summary of the invention
The object of the present invention is to provide the magnetic polydimethylsiloxane of a kind of tool (PDMS) material and preparation method thereof.
Technical scheme of the present invention is as follows:
A kind of polydimethylsiloxane, it has magnetic.The relative magnetic permeability of described polydimethylsiloxane is 40 ~ 100, is preferably 100.
The present invention further provides the preparation method of the magnetic polydimethylsiloxane of tool described above, this preparation method comprises the steps:
(1) polydimethylsiloxane prepolymer body and solidifying agent are uniformly mixed, vacuum eliminates the bubble in mixed solution, obtains liquid polydimethylsiloxane;
(2) in liquid polydimethylsiloxane, magnetic nanoparticle is added by the mass ratio of 20:1 ~ 50:1, be uniformly mixed, after ultrasonication dispersed magnetic nano particle, be uniformly mixed, vacuum eliminates the bubble in mixed solution, obtains liquid magnetic polydimethylsiloxane;
(3) solidify liquid magnetic polydimethylsiloxane, obtain the magnetic polydimethylsiloxane of tool, i.e. magnetic polydimethylsiloxane.
In above-mentioned preparation method, polydimethylsiloxane prepolymer body described in step (1) and solidifying agent be this area conventional prepare micro-fluidic chip polydimethylsiloxane prepolymer body (i.e. raw material) and solidifying agent, specifically will not limit in the present invention, polydimethylsiloxane raw material of the present invention can be realized and solidifying agent all can use.The present invention can preferentially adopt viscosity under room temperature condition to be 70 ~ 80mm
2the polydimethylsiloxane prepolymer body of/s.The present invention more preferably adopts DOW CORNING DC184 SYLGARD 184 (comprising A liquid and B liquid, being equivalent to described polydimethylsiloxane prepolymer body and solidifying agent respectively).
In above-mentioned preparation method, the object of the ultrasonication described in step (2) makes magnetic nanoparticle be dispersed in liquid polydimethylsiloxane, concrete operations are carried out according to this area ordinary method, preferably adopt in 60 ~ 100KHz, 20 ~ 60 DEG C, process 10 ~ 15 minutes.
Further, in technical scheme described above, the solidification described in step (3) is preferably carried out at 50-100 DEG C.
Further, in technical scheme described above, the magnetic nanoparticle described in step (2) is ferrite particle, and the granularity of described magnetic nanoparticle is preferably 1 ~ 100nm, is more preferably 10 ~ 30nm, most preferably is 20nm.Wherein said ferrite particle is preferably ferric oxide particles, most preferably is ferriferrous oxide particles.
Further, in technical scheme described above, the liquid polydimethylsiloxane described in step (2) and the mass ratio of magnetic nanoparticle are preferably 20:1 ~ 50:1, are more preferably 20:1.
The present invention also provides the tool prepared by preparation method described above magnetic polydimethylsiloxane.This polydimethylsiloxane has good magnetic, is not also with magnetic polydimethyl siloxane material at present.
Beneficial effect of the present invention: the invention provides magnetic PDMS material of a kind of band and preparation method thereof.Compared with traditional PDMS, PDMS material prepared by method of the present invention has magnetic, by attraction, can prepare some bascule in micro-fluidic chip, as the activity in the throttling valve of microchannel is dammed the active units etc. in unit, magnet pump.
Accompanying drawing explanation
Fig. 1 is the preparation flow figure of the magnetic polydimethylsiloxane of tool of the present invention.
Drawing reference numeral: 1.PDMS host, 2.PDMS solidifying agent, 3. liquid PDMS, 4. magnetic nanoparticle, 5. liquid magnetic PDMS, 6. solid-state magnetic PDMS.
Embodiment
Following non-limiting example can make the present invention of those of ordinary skill in the art's comprehend, but does not limit the present invention in any way.In following embodiment, if no special instructions, the experimental technique used is ordinary method, and material therefor, reagent etc. all can be bought from biological or chemical company.
Embodiment of the present invention material therefor:
PDMS host and PDMS solidifying agent: DOW CORNING DC184 SYLGARD 184, wherein said PDMS host is equivalent to the polydimethylsiloxane prepolymer body described in the present invention, and PDMS solidifying agent is equivalent to the solidifying agent described in the present invention.
Magnetic nanoparticle: ferriferrous oxide particles
Embodiment 1
A preparation for the magnetic polydimethylsiloxane of tool, prepares as follows, preparation method's schema as shown in Figure 1:
(1) by PDMS host 1 and PDMS solidifying agent 2 in mass ratio 10:1 mix, after stirring 3min, mixed solution is put into the degasification of 25 DEG C of constant voltage vacuum chambers, until bubble is removed completely, obtains liquid PDMS 3;
(2) magnetic nanoparticle 4 (ferriferrous oxide particles is added in liquid PDMS 3, granularity 20nm), after being uniformly mixed 5min, in the ultrasonication of 80KHz frequency, magnetic nanoparticle 4 is dispersed in liquid PDMS 3, is uniformly mixed, the degasification of mixed solution 25 DEG C of constant voltage vacuum chambers, until bubble is removed completely, obtain liquid magnetic PDMS 5; The mass ratio of wherein said liquid PDMS 3 and magnetic nanoparticle 4 is 20:1;
(3) liquid magnetic PDMS 5 is put into thermostat container 80 DEG C of solidifications 1 hour, obtain solid-state magnetic PDMS 6, its relative magnetic permeability is 100.
Embodiment 2
The magnetic polydimethylsiloxane of a kind of tool, prepares as follows:
(1) by PDMS host and PDMS solidifying agent in mass ratio 10:1 mix, after stirring 3min, mixed solution is put into the degasification of 25 DEG C of constant voltage vacuum chambers, until bubble is removed completely, obtains liquid PDMS;
(2) magnetic nanoparticle (ferriferrous oxide particles is added by liquid PDMS, granularity 40nm), after being uniformly mixed 5min, in the ultrasonication of 80KHz frequency, magnetic nanoparticle is dispersed in liquid PDMS, is uniformly mixed, the degasification of mixed solution 25 DEG C of constant voltage vacuum chambers, until bubble is removed completely, obtain liquid magnetic PDMS; The mass ratio of wherein said liquid PDMS and magnetic nanoparticle is 20:1;
(3) liquid magnetic PDMS is put into thermostat container 80 DEG C of solidifications 1 hour, obtain solid-state magnetic PDMS, its relative magnetic permeability is 85.
Embodiment 3
The magnetic polydimethylsiloxane of a kind of tool, prepares as follows:
(1) by PDMS host and PDMS solidifying agent in mass ratio 10:1 mix, after stirring 3min, mixed solution is put into the degasification of 25 DEG C of constant voltage vacuum chambers, until bubble is removed completely, obtains liquid PDMS;
(2) magnetic nanoparticle (ferriferrous oxide particles is added by liquid PDMS, granularity 60nm), after being uniformly mixed 5min, in the ultrasonication of 80KHz frequency, magnetic nanoparticle is dispersed in liquid PDMS, is uniformly mixed, the degasification of mixed solution 25 DEG C of constant voltage vacuum chambers, until bubble is removed completely, obtain liquid magnetic PDMS; The mass ratio of wherein said liquid PDMS and magnetic nanoparticle is 20:1;
(3) liquid magnetic PDMS is put into thermostat container 80 DEG C of solidifications 1 hour, obtain solid-state magnetic PDMS, its relative magnetic permeability is 70.
Embodiment 4
The magnetic polydimethylsiloxane of a kind of tool, prepares as follows:
(1) by PDMS host and PDMS solidifying agent in mass ratio 8:1 mix, after stirring 3min, mixed solution is put into the degasification of 25 DEG C of constant voltage vacuum chambers, until bubble is removed completely, obtains liquid PDMS;
(2) magnetic nanoparticle (ferriferrous oxide particles is added by liquid PDMS, granularity 20nm), after being uniformly mixed 5min, in the ultrasonication of 80KHz frequency, magnetic nanoparticle is dispersed in liquid PDMS, is uniformly mixed, the degasification of mixed solution 25 DEG C of constant voltage vacuum chambers, until bubble is removed completely, obtain liquid magnetic PDMS; The mass ratio of wherein said liquid PDMS and magnetic nanoparticle is 20:1;
(3) liquid magnetic PDMS is put into thermostat container 80 DEG C of solidifications 1 hour, obtain solid-state magnetic PDMS, its relative magnetic permeability is 90.
Embodiment 5
The magnetic polydimethylsiloxane of a kind of tool, prepares as follows:
(1) by PDMS host and PDMS solidifying agent in mass ratio 10:1 mix, after stirring 3min, mixed solution is put into the degasification of 25 DEG C of constant voltage vacuum chambers, until bubble is removed completely, obtains liquid PDMS;
(2) magnetic nanoparticle (ferriferrous oxide particles is added by liquid PDMS, granularity 20nm), after being uniformly mixed 5min, in the ultrasonication of 80KHz frequency, magnetic nanoparticle is dispersed in liquid PDMS, is uniformly mixed, the degasification of mixed solution 25 DEG C of constant voltage vacuum chambers, until bubble is removed completely, obtain liquid magnetic PDMS; The mass ratio of wherein said liquid PDMS and magnetic nanoparticle is 40:1;
(3) liquid magnetic PDMS is put into thermostat container 80 DEG C of solidifications 1 hour, obtain solid-state magnetic PDMS, its relative magnetic permeability is 50.
Claims (7)
1. a polydimethylsiloxane, is characterized in that, described polydimethylsiloxane has during externally-applied magnetic field effect and has magnetic.
2. polydimethylsiloxane according to claim 1, is characterized in that, the relative magnetic permeability of described polydimethylsiloxane is 40 ~ 100.
3. a preparation method for the magnetic polydimethylsiloxane of tool, comprises the steps:
(1) polydimethylsiloxane prepolymer body and solidifying agent are uniformly mixed, vacuum eliminates the bubble in mixed solution, obtains liquid polydimethylsiloxane;
(2) in liquid polydimethylsiloxane, magnetic nanoparticle is added by the mass ratio of 20:1 ~ 50:1, be uniformly mixed, after ultrasonication dispersed magnetic nano particle, be uniformly mixed, vacuum eliminates the bubble in mixed solution, obtains liquid magnetic polydimethylsiloxane;
(3) solidify liquid magnetic polydimethylsiloxane, obtain the magnetic polydimethylsiloxane of tool.
4. preparation method according to claim 3, is characterized in that, the polydimethylsiloxane prepolymer body described in step (1) and the mass ratio of solidifying agent are 8:1 ~ 12:1.
5. preparation method according to claim 3, is characterized in that, described be solidificated in 50 ~ 100 DEG C at carry out.
6. preparation method according to claim 3, is characterized in that, the magnetic nanoparticle described in step (2) is ferrite particle.
7. the preparation method according to any one of claim 3 ~ 6, is characterized in that, the granularity of described magnetic nanoparticle is 1 ~ 100nm.
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| CN105413546A (en) * | 2015-12-14 | 2016-03-23 | 沈阳理工大学 | Micro-fluidic mixing process and device |
| CN105964229A (en) * | 2016-04-21 | 2016-09-28 | 安徽建筑大学 | Porous superhydrophobic oil-absorption magnetic separation material and preparation method thereof |
| CN107216655A (en) * | 2017-06-08 | 2017-09-29 | 京东方科技集团股份有限公司 | Impression block and preparation method thereof, imprinting apparatus, method for stamping and substrate |
| CN109535725A (en) * | 2018-12-12 | 2019-03-29 | 深圳丰盈磁性材料有限公司 | A kind of fire resistant magnetic rubber and preparation method thereof |
| CN110038324A (en) * | 2019-04-26 | 2019-07-23 | 河南大学 | A kind of magnetism fire resisting oil absorbing porous silastic material and its preparation method and application |
| CN110628068A (en) * | 2019-09-30 | 2019-12-31 | 天津大学 | Method for preparing surface pattern structure with magnetic response |
| CN113511818A (en) * | 2021-06-23 | 2021-10-19 | 东南大学江北新区创新研究院 | Anisotropic magnetic nano piezoelectric material and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105413546A (en) * | 2015-12-14 | 2016-03-23 | 沈阳理工大学 | Micro-fluidic mixing process and device |
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| CN105964229A (en) * | 2016-04-21 | 2016-09-28 | 安徽建筑大学 | Porous superhydrophobic oil-absorption magnetic separation material and preparation method thereof |
| CN107216655A (en) * | 2017-06-08 | 2017-09-29 | 京东方科技集团股份有限公司 | Impression block and preparation method thereof, imprinting apparatus, method for stamping and substrate |
| CN107216655B (en) * | 2017-06-08 | 2020-04-28 | 京东方科技集团股份有限公司 | Imprint template, manufacturing method thereof, imprint device, imprint method and substrate |
| CN109535725A (en) * | 2018-12-12 | 2019-03-29 | 深圳丰盈磁性材料有限公司 | A kind of fire resistant magnetic rubber and preparation method thereof |
| CN110038324A (en) * | 2019-04-26 | 2019-07-23 | 河南大学 | A kind of magnetism fire resisting oil absorbing porous silastic material and its preparation method and application |
| CN110038324B (en) * | 2019-04-26 | 2021-06-29 | 河南大学 | Magnetic fireproof oil-absorbing porous silicon rubber material and preparation method and application thereof |
| CN110628068A (en) * | 2019-09-30 | 2019-12-31 | 天津大学 | Method for preparing surface pattern structure with magnetic response |
| CN113511818A (en) * | 2021-06-23 | 2021-10-19 | 东南大学江北新区创新研究院 | Anisotropic magnetic nano piezoelectric material and preparation method thereof |
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Application publication date: 20141217 |