CN103509202A - Method for preparing super-hydrophobic coatings with magnetic powder as filler - Google Patents
Method for preparing super-hydrophobic coatings with magnetic powder as filler Download PDFInfo
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- CN103509202A CN103509202A CN201310442947.3A CN201310442947A CN103509202A CN 103509202 A CN103509202 A CN 103509202A CN 201310442947 A CN201310442947 A CN 201310442947A CN 103509202 A CN103509202 A CN 103509202A
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Abstract
The invention provides a method for preparing super-hydrophobic coatings with magnetic powder as filler. The method comprises the following steps: (1) PVDF (Polyvinylidene Fluoride) powder with the particle size of 10-25 microns and magnetic powder with the particle size of 50-200 microns are evenly ground in an agate mortar to obtain mixed powder with magnetic powder volume percentage content as 30%-45%; the mixed powder is put in a die, is applied with 10-50 MPa of pressure for 10-30 minutes, is heated for a certain temperature, and is naturally cooled to the room temperature to obtain magnetic powder-filled PVDF composite material samples; (2) the composite material samples are polished by abrasive paper for metallograph to obtain surface rough structures; (3) the rough surfaces of the composite material samples are decorated by low surface materials to obtain the super-hydrophobic coatings with the magnetic powder as the filler. The method fills the blank of using the magnetic powder as the filler to prepare the super-hydrophobic coatings.
Description
Technical field
The present invention relates to a kind ofly take magnetic and prepare the method for super-hydrophobic coat as filler.
Background technology
Super hydrophobic surface refers to the surface that the contact angle with water is greater than 150 °, and roll angle is less than 10 °; Because it is with a wide range of applications at waterproof, antifog, snow defence, anti-pollution, antiblocking, anti-oxidant, protection against corrosion and the aspect such as automatically cleaning and anti-conduction of current, be subject to Materials science investigator's extensive concern.The super-hydrophobic method of preparation is also comparatively complicated at present, this has greatly hindered application and the popularization of super-hydrophobic coat, and current super-hydrophobic coat is owing to being subject to various interference, cannot be suitable for special purpose, especially aerospace, the fields such as military project, some parts is when possessing super-hydrophobic coat advantage, also must meet the ability of anti-electromagnetic interference, and preparation has super-hydrophobic coat advantage, the material again with anti-electromagnetic interference capability is not also in the news, correlation technique in this area also in conceptual phase.
Summary of the invention
The object of the present invention is to provide and a kind ofly take magnetic and prepare the method for super-hydrophobic coat as filler, it has advantages of the coating performance excellence of simple, the easy to operate and preparation of technique.
The present invention is achieved like this, a kind ofly take magnetic and prepare the method for super-hydrophobic coat as filler, it is characterized in that: said method comprising the steps of: (1) is that the PVDF powder of 10-30 μ m and magnetic that particle diameter is 50-200 μ m grind evenly in agate mortar by particle diameter, and obtaining magnetic volume percent content is 30% ~ 45% mixed powder; Mixed powder is put into mould, apply 10-50 MPa pressure and continue 10 ~ 30min, and be heated to after 200 ℃, naturally cool to room temperature and receive the PVDF composite sample that magnetic is filled; (2) use abrasive paper for metallograph polishing composite sample to obtain surface roughness; (3) use low surface energy material to modify composite sample surface, its modifying method is: 10-50 μ L low surface energy material is at room temperature dissolved in 20-50 mL dehydrated alcohol, subsequently the matrix material after polishing is immersed in this solution, dipping time is 1-3 h; Then sample is taken out, at 100-130 ℃, after thermal treatment 10-30 min, sample surfaces is cleaned with dehydrated alcohol, after naturally drying, obtain the coating that surface has ultra-hydrophobicity;
Described abrasive paper for metallograph is that rank is 200# ~ 2000#, and its polishing mode is the polishing of " 8 " font route, and polishing pressure is 5000-10000 Pa, and polishing number of times is 50-500 time;
Described low surface energy material is one of following: perfluoro capryl trichlorosilane, octadecyl trichlorosilane alkane, perfluoro capryl triethoxyl silane or n-octyl triethoxysilicane.
Technique effect of the present invention is: the present invention is that a kind of technique is simple, with low cost, the method for preparing magnetic super hydrophobic material of excellent performance, the super-hydrophobic magnetic surface that it is prepared is projection, hole shape structure, the part that distributing on surface tissue nanometer scale, contact angle is between 150 ~ 170 °, water droplet is less than 5 ° in surperficial roll angle, application industry is wide, has good dual-use value.
Accompanying drawing explanation
Fig. 1 is that embodiment 1 prepares magnetic super hydrophobic surface contact angle figure.
Fig. 2 is that embodiment 1 prepares magnetic super hydrophobic surface SEM figure.
Embodiment
Specific embodiments of the invention given below and accompanying drawing can further clearly be resolved the present invention, but following example is not limitation of the invention;
Embodiment 1
(1) by particle diameter, be that the PVDF powder of 25 μ m and magnetic that particle diameter is 50 μ m mix 30min in agate mortar, obtaining magnetic volume percent content is 30%; Mixed powder is put into the sintered-carbide die that internal diameter is 2cm, under 10 MPa pressure, suppress after 10min, and be heated to after 200 ℃, naturally cool to room temperature and receive the PVDF composite sample that magnetic is filled; (2) use abrasive paper for metallograph polishing composite sample to obtain surface roughness; (3) use low surface energy material to modify composite sample surface, its modifying method is: 20 μ L perfluoro capryl triethoxyl silanes are at room temperature dissolved in 20 mL dehydrated alcohols, subsequently the matrix material after polishing is immersed in this solution, dipping time is 2 h; Then sample is taken out, at 130 ℃, after thermal treatment 30 min, sample surfaces is cleaned with dehydrated alcohol, after naturally drying, obtain the coating that surface has ultra-hydrophobicity;
Described abrasive paper for metallograph is that rank is 200#, and its polishing mode is the polishing of " 8 " font route, and polishing pressure is 5000Pa, and polishing number of times is 100 times;
Adopt the hot field emission scanning electron microscope of the SU1510 of Hitachi to observe sample topography, find that this magnetic wafer sample is the micron and nanometer composite structure of projection, hole shape.The magnetic wafer sample of embodiment 1 preparation is placed in 25 ℃, the environment of relative humidity 35% and is placed 6 months, use again Kr ü ssDSA 100 contact angle tester specimen wettabilitys, result shows that the contact angle of this magnetic disk surfaces is 166 °, and roll angle is less than 5 °.
Embodiment 2
(1) by particle diameter, be that the PVDF powder of 10 μ m and magnetic that particle diameter is 150 μ m mix 30min in agate mortar, obtaining magnetic volume percent content is 40%; Mixed powder is put into the sintered-carbide die that internal diameter is 2cm, under 50 MPa pressure, suppress after 20min, and be heated to after 200 ℃, naturally cool to room temperature and receive the PVDF composite sample that magnetic is filled; (2) use abrasive paper for metallograph polishing composite sample to obtain surface roughness; (3) use low surface energy material to modify composite sample surface, its modifying method is: 10 μ L octadecyl trichlorosilane alkane are at room temperature dissolved in 35 mL dehydrated alcohols, subsequently the matrix material after polishing are immersed in this solution, dipping time is 1 h; Then sample is taken out, at 100 ℃, after thermal treatment 20 min, sample surfaces is cleaned with dehydrated alcohol, after naturally drying, obtain the coating that surface has ultra-hydrophobicity;
Described abrasive paper for metallograph is that rank is 400#, and its polishing mode is the polishing of " 8 " font route, and polishing pressure is 10000Pa, and polishing number of times is 200 times;
Adopt the hot field emission scanning electron microscope of the SU1510 of Hitachi to observe sample topography, find that this magnetic wafer sample is the micron and nanometer composite structure of projection, hole shape, as shown in Figure 2; The magnetic wafer sample of embodiment 1 preparation is placed in 25 ℃, the environment of relative humidity 35% and is placed 6 months, use again Kr ü ssDSA 100 contact angle tester specimen wettabilitys, result shows that the contact angle of this magnetic disk surfaces is 163 °, and roll angle is less than 5 °, as shown in Figure 1.
Embodiment 3
(1) by particle diameter, be that the PVDF powder of 30 μ m and magnetic that particle diameter is 200 μ m mix 30min in agate mortar, obtaining magnetic volume percent content is 45%; Mixed powder is put into the sintered-carbide die that internal diameter is 2cm, under 30 MPa pressure, suppress after 30min, and be heated to after 200 ℃, naturally cool to room temperature and receive the PVDF composite sample that magnetic is filled; (2) use abrasive paper for metallograph polishing composite sample to obtain surface roughness; (3) use low surface energy material to modify composite sample surface, its modifying method is: 50 μ L perfluoro capryl triethoxyl silanes are at room temperature dissolved in 50mL dehydrated alcohol, subsequently the matrix material after polishing is immersed in this solution, dipping time is 3h; Then sample is taken out, at 120 ℃, after thermal treatment 10 min, sample surfaces is cleaned with dehydrated alcohol, after naturally drying, obtain the coating that surface has ultra-hydrophobicity;
Described abrasive paper for metallograph is that rank is 2000#, and its polishing mode is the polishing of " 8 " font route, and polishing pressure is 8000Pa, and polishing number of times is 500 times;
Adopt the hot field emission scanning electron microscope of the SU1510 of Hitachi to observe sample topography, find that this magnetic wafer sample is the micron and nanometer composite structure of projection, hole shape; The magnetic wafer sample of embodiment 1 preparation is placed in 25 ℃, the environment of relative humidity 35% and is placed 6 months, use again Kr ü ssDSA 100 contact angle tester specimen wettabilitys, result shows that the contact angle of this magnetic disk surfaces is 165 °, and roll angle is less than 5 °.
Claims (4)
1. the magnetic of take is prepared the method for super-hydrophobic coat as filler, it is characterized in that: described method is:
(1) by particle diameter, be that the PVDF powder of 10-30 μ m and magnetic that particle diameter is 50-200 μ m grind evenly in agate mortar, obtaining magnetic volume percent content is 30% ~ 45% mixed powder; Mixed powder is put into mould, apply 10-50 MPa pressure and continue 10 ~ 30min, and be heated to after 200 ℃, naturally cool to room temperature and receive the PVDF composite sample that magnetic is filled;
(2) use abrasive paper for metallograph polishing composite sample to obtain surface roughness;
(3) use low surface energy material to modify composite sample surface, its modifying method is: 10-50 μ L low surface energy material is at room temperature dissolved in 20-50 mL dehydrated alcohol, subsequently the matrix material after polishing is immersed in this solution, dipping time is 1-3 h; Then sample is taken out, at 100-130 ℃, after thermal treatment 10-30 min, sample surfaces is cleaned with dehydrated alcohol, after naturally drying, obtain the coating that surface has ultra-hydrophobicity.
2. the preparation method of magnetic super-hydrophobic coat as claimed in claim 1, it is characterized in that, the abrasive paper for metallograph described in above-mentioned steps (2) is that rank is 200# ~ 2000#, and its polishing mode is the polishing of " 8 " font route, polishing pressure is 5000-10000 Pa, and polishing number of times is 50-500 time.
3. the preparation method of magnetic super hydrophobic material as claimed in claim 1, it is characterized in that, the described low surface energy material of step (3) is one of following: perfluoro capryl trichlorosilane, octadecyl trichlorosilane alkane, perfluoro capryl triethoxyl silane or n-octyl triethoxyl silane.
4. the preparation method of magnetic super hydrophobic material as claimed in claim 1, is characterized in that, the water droplet static contact angle on the described super-hydrophobic coat of step (3) surface is between 150 ~ 170 °, and water droplet is less than 5 ° in surperficial roll angle.
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| CN201310442947.3A CN103509202A (en) | 2013-09-26 | 2013-09-26 | Method for preparing super-hydrophobic coatings with magnetic powder as filler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108372671A (en) * | 2018-02-06 | 2018-08-07 | 日丰企业（佛山）有限公司 | Hydrophobic tubing of hydrophobic material, internal layer and preparation method thereof |
| CN108948401A (en) * | 2018-09-05 | 2018-12-07 | 河南工程学院 | The bromination processing method on polyvinylidene fluoride composite material surface |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102336972A (en) * | 2011-06-22 | 2012-02-01 | 山东轻工业学院 | Method for preparing super-hydrophobic nano-magnetic thin film |
| CN102728275A (en) * | 2011-04-13 | 2012-10-17 | 宁波大学 | Preparation method of hydrophobic magnetic powder |
| CN103224642A (en) * | 2013-04-28 | 2013-07-31 | 黑龙江大学 | Magnetic hydrophobic film preparation method |
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- 2013-09-26 CN CN201310442947.3A patent/CN103509202A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102728275A (en) * | 2011-04-13 | 2012-10-17 | 宁波大学 | Preparation method of hydrophobic magnetic powder |
| CN102336972A (en) * | 2011-06-22 | 2012-02-01 | 山东轻工业学院 | Method for preparing super-hydrophobic nano-magnetic thin film |
| CN103224642A (en) * | 2013-04-28 | 2013-07-31 | 黑龙江大学 | Magnetic hydrophobic film preparation method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108372671A (en) * | 2018-02-06 | 2018-08-07 | 日丰企业（佛山）有限公司 | Hydrophobic tubing of hydrophobic material, internal layer and preparation method thereof |
| CN108948401A (en) * | 2018-09-05 | 2018-12-07 | 河南工程学院 | The bromination processing method on polyvinylidene fluoride composite material surface |
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Application publication date: 20140115 |