CN102381870A - Manufacturing method of diatomite-based shark scale groove-like composite drag reduction surface - Google Patents
Manufacturing method of diatomite-based shark scale groove-like composite drag reduction surface Download PDFInfo
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- CN102381870A CN102381870A CN2011102616673A CN201110261667A CN102381870A CN 102381870 A CN102381870 A CN 102381870A CN 2011102616673 A CN2011102616673 A CN 2011102616673A CN 201110261667 A CN201110261667 A CN 201110261667A CN 102381870 A CN102381870 A CN 102381870A
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Abstract
The invention relates to the technical field of bionics, and specifically, relates to a manufacturing method of a diatomite-based shark scale groove-like composite drag reduction surface. The manufacturing method of the diatomite-based shark scale groove-like composite drag reduction surface comprises the following steps of 1, carrying out diatomite pretreatment to obtain a primary diatomite mixture, 2, carrying out filtration and screening of the primary diatomite mixture to obtain a diatomite mixture, 3, carrying out diatomite wet blank preparation, 4, carrying out high-fidelity shark scale groove-like morphology copying and molding to obtain a nickel-made shark scale groove-like female mold, and 5, carrying out sintering curing direct-forming of diatomite through shark scale groove-like morphology constraint to obtain the diatomite-based shark scale groove-like composite drag reduction surface. In the invention, through a high-temperature sintering curing method, diatomite is cured into a poriferous surface and a shark scale groove-like morphology can be directly duplicated on the poriferous surface, so that the diatomite-based shark scale groove-like composite drag reduction surface is obtained. The diatomite-based shark scale groove-like composite drag reduction surface has drag reduction functions produced by copied shark scale grooves, and simultaneously has drag reduction functions produced by copied shark sustained-release self-lubricating mucus.
Description
Technical field
The present invention relates to the bionics techniques field, be specifically related to a kind of making method of drag reduction surface.
Background technology
Shark is the swimming top-notch player in the ocean, and its speed of cruising in water is about 5kph, when chasing prey, can instantaneously break out 70kph.The height of shark trip speed is except outside the Pass the streamlined body with its standard has, and also special with it micron order scale groove structure and its body surface excretory mucus are in close relations, and both compound actions are called " shark skin effect ".Current, imitation shagreen drag reduction mechanism, the high imitative shark composite anti-drag true to nature of manufacturing surface have become the focus of domestic and international research, and ROV and long distance pipeline drag reduction field have important use value under water.
In addition, diatom is most important one of the quasi-microorganism that swims, and kind is many, quantity is big, it is extremely extensive to distribute.Diatom not only form is various, and common have sphere, dish type, round shape, rod, boat-shaped etc., and special material and structure are arranged.On material, the main chemical of diatom shell is a silicon-dioxide; Structurally, monomer diatom size is made up of the upper and lower shell face between several microns to tens microns, and enclosure interior has cavity structure, and surface of shell is covered with nanometer level microporous.
Zeyssatite is the silicastone that ancient times, the remains settling generated of diatom, mainly is made up of the siliceous remains of ancient times diatom and other mikrobes (radiolaria, sponge etc.), and main chemical is a silicon-dioxide.Zeyssatite exists as mineral products at occurring in nature in a large number, thereby wide material sources, cheap.Exquisiteness, light weight, porosity are big because zeyssatite has, adsorptivity and perviousness is strong, chemical property is stable, wear-resisting, heat-resisting, characteristics such as certain intensity are arranged, and are a kind of materials with significant application value.
Summary of the invention
The objective of the invention is to, the making method based on diatomaceous imitative shark composite anti-drag surface is provided, to solve the problems of the technologies described above.
The technical problem that the present invention solved can adopt following technical scheme to realize:
Making method based on diatomaceous imitative shark composite anti-drag surface comprises 1) the zeyssatite pretreatment technology, make the zeyssatite mixture; 2) tripolite filtering screen technology makes the zeyssatite mixture; 3) the wet base manufacture craft of zeyssatite is characterized in that, also comprises the steps:
4) high imitative shark scale groove pattern true to nature is copied into type:
(A) it is that nickel, thickness are the imitative shark scale groove negative template of nickel matter of 2.5mm～3.5mm that the clone method that adopts biological epidermis to duplicate template copies metal material;
(B) the imitative shark scale groove negative template of nickel matter being put into deionized water at ambient temperature, is that 800W～1200W, operating frequency are ultrasonic cleaning 10min～20min under the condition of 30KHz～50KHz at power, dries for use then;
5) the zeyssatite sintering curing straight forming under the imitative shark scale groove pattern constraint:
(A) with 4) plaited surface that has of the imitative shark scale groove negative template of the nickel matter that makes places on the sintering oven pedestal in the high temperature sintering furnace, then with 3 up) the wet base of zeyssatite that makes tips upside down on having on the plaited surface of the imitative shark scale groove negative template of nickel matter;
(B) in 1050 ℃～1150 ℃ TRs, carry out constant temperature sintering processes 1.5h～2.5h, carry out the demoulding after slowly reducing to room temperature, promptly obtain the zeyssatite solidified surface;
(C) under the room temperature condition zeyssatite solidified surface after the demoulding is immersed in the deionized water; At power is that 800W～1200W, operating frequency are ultrasonic cleaning 10min～20min under the condition of 30KHz～50KHz; Dry up with N2 then, promptly obtain based on diatomaceous imitative shark composite anti-drag surface.
The method that the present invention is solidified into zeyssatite porous surface and directly duplicates imitative shark scale pattern above that through high temperature sintering solidified mode; Zeyssatite solidified surface behind high temperature sintering; Its solidification intensity is at 30MPa～40MPa, and porosity is 40%～60%.Adopt the imitative shark composite anti-drag surface of this method made, its pattern naturalness is 65%～75%.The imitative shark composite anti-drag surface of made not only has the imitative shark scale groove pattern of high micron order true to nature; Can bring into play the anti-drag function of imitative shark scale groove; But also have the nanometer porous microstructure of diatom shell, can bring into play the imitative mucous anti-drag function of shark slowly-releasing self-lubricating simultaneously.Thereby realize improving the purpose of submarine navigation device and long distance oil-gas transport pipe drag reduction ability.
In the step 5), for ease of the demoulding, in advance applying one deck mass percent concentration on the plaited surface having of the imitative shark scale groove negative template of nickel matter is 80% the SP 1 aqueous solution.
In the step 1), the zeyssatite pretreatment technology can adopt pretreatment process commonly used, also can adopt following zeyssatite pre-treatment step:
(A) under the room temperature condition, be immersion treatment 3min～5min in 1.5%～3.5% the HF solution at mass percent concentration, use the filter cloth of 5 μ m～20 μ m to filter then, obtain the first zeyssatite mixture zeyssatite;
(B) be under 80 ℃～90 ℃ conditions with the said first zeyssatite mixture in temperature; Immersion treatment 10min～20min in NH4, H2O2, H2O mixed solution (1: 2: 7); Use the filter cloth of 5 μ m～20 μ m to filter then, obtain the second zeyssatite mixture;
(C) the said second zeyssatite mixture is added deionized water at ambient temperature; At power is that 800W～1200W, operating frequency are under the condition of 30KHz～50KHz; Ultrasonic cleaning 10min～20min uses the filter cloth of 5 μ m～20 μ m to filter then, obtains the 3rd zeyssatite mixture.
Step 2) in; Tripolite filtering screen technology can adopt screen method commonly used; Also can adopt following steps: with 1) the zeyssatite mixture that makes adds deionized water at ambient temperature; Use the filter cloth of 30 μ m～40 μ m to filter then, filter the zeyssatite mixture of particle diameter more than 30 μ m, obtain the 4th zeyssatite mixture.
In the step 3), the wet base manufacture craft of zeyssatite can adopt wet base making method commonly used, also can adopt following steps:
(A) under the room temperature condition, with 2) the zeyssatite mixture that obtains adds deionized water, and the preparation solid content is 50%～70% zeyssatite mud, old then 1d;
(B) in the mould of definite shape, adopt slip-casting shaping process to produce the wet base of zeyssatite;
(C) under the room temperature condition the wet base of zeyssatite is carried out preliminary natural air drying, water ratio is controlled at 60%～80%.
In the step 3), mould can be different according to the shape of the zeyssatite solidified surface that will make, like tabular or pipe shape, can be arbitrarily mold exchange more.
For ease of the demoulding, in the step 3), be 80% the SP 1 aqueous solution in advance at mould inner surface coating one deck mass percent concentration.
Beneficial effect: the present invention adopts high temperature sintering solidified mode that zeyssatite is solidified into porous surface and directly duplicates imitative shark scale pattern above that; The imitative shark composite anti-drag surface that obtains; The anti-drag function of imitative shark scale groove not only can be brought into play, but also the imitative mucous anti-drag function of shark slowly-releasing self-lubricating can be brought into play simultaneously.
Description of drawings
Fig. 1 is a schema of the present invention;
The structural representation of Fig. 2 during for zeyssatite sintering curing straight forming of the present invention;
Fig. 3 is the imitative shark scale groove negative template surface microscopic topographic of nickel matter of the present invention;
Fig. 4 is the imitative shark composite anti-drag surface microscopic topographic of the present invention.
Embodiment
For technique means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, further set forth the present invention below in conjunction with concrete diagram.
With reference to Fig. 1, the making method based on diatomaceous imitative shark composite anti-drag surface comprises the steps:
The first step, the zeyssatite pretreatment technology makes the zeyssatite mixture.The zeyssatite pretreatment technology can adopt pretreatment process commonly used; Also can adopt following zeyssatite pre-treatment step: (A) under the room temperature condition; Is immersion treatment 3min～5min in 1.5%～3.5% the HF solution with zeyssatite at mass percent concentration; Use the filter cloth of 5 μ m～20 μ m to filter then, obtain the first zeyssatite mixture.(B) be under 80 ℃～90 ℃ conditions with the first zeyssatite mixture in temperature, immersion treatment 10min～20min in NH4, H2O2, H2O mixed solution (1: 2: 7) uses the filter cloth of 5 μ m～20 μ m to filter then, obtains the second zeyssatite mixture.(C) the second zeyssatite mixture is added deionized water at ambient temperature; At power is that 800W～1200W, operating frequency are under the condition of 30KHz～50KHz; Ultrasonic cleaning 10min～20min uses the filter cloth of 5 μ m～20 μ m to filter then, obtains the 3rd zeyssatite mixture.
In second step, tripolite filtering screen technology makes the zeyssatite mixture.Tripolite filtering screen technology can adopt screen method commonly used; Also can adopt following steps: the zeyssatite mixture that the first step is made adds deionized water at ambient temperature; Use the filter cloth of 30 μ m～40 μ m to filter then; Filter the zeyssatite mixture of particle diameter more than 30 μ m, obtain the 4th zeyssatite mixture.
In the 3rd step, the zeyssatite base manufacture craft that wets can adopt wet base making method commonly used; Also can adopt following steps: (A) under the room temperature condition; The zeyssatite mixture that second step was obtained adds deionized water, and the preparation solid content is 50%～70% zeyssatite mud, old then 1d.(B) in the mould of definite shape, adopt slip-casting shaping process to produce the wet base of zeyssatite.Mould can be different according to the shape of the zeyssatite solidified surface that will make, like tabular or pipe shape, can be arbitrarily mold exchange more.(C) under the room temperature condition the wet base of zeyssatite is carried out preliminary natural air drying, water ratio is controlled at 60%～80%.
The 4th step: high imitative shark scale groove pattern true to nature is copied into type: it is that nickel, thickness are the imitative shark scale groove negative template of nickel matter of 2.5mm～3.5mm that the clone method that (A) adopts biological epidermis to duplicate template copies metal material.(B) the imitative shark scale groove negative template of nickel matter being put into deionized water at ambient temperature, is that 800W～1200W, operating frequency are ultrasonic cleaning 10min～20min under the condition of 30KHz～50KHz at power, dries for use then.The clone method that biological epidermis duplicates template can adopt existing method to obtain duplicating template.With reference to Fig. 3, imitate the microtexture synoptic diagram of shark scale groove negative template for the nickel matter that adopts the pulsed electrical casting method to make.
The 5th step; Zeyssatite sintering curing straight forming under the imitative shark scale groove pattern constraint: with reference to Fig. 2; (A) plaited surface that has that the nickel matter that the 4th step was made is imitated shark scale groove negative template 1 places on the sintering oven pedestal 2 in the high temperature sintering furnace up; Then with 3) the wet mold tool 3 of the zeyssatite that makes is placed on imitative shark scale groove negative template 1 top of nickel matter, and the wet bases 4 of the zeyssatite in the mould 3 tip upside down on having on the plaited surface of the imitative shark scale groove negative template 1 of nickel matter.(B) in 1050 ℃～1150 ℃ TRs, carry out constant temperature sintering processes 1.5h～2.5h, carry out the demoulding after slowly reducing to room temperature, promptly obtain the zeyssatite solidified surface; For ease of the demoulding, be 80% the SP 1 aqueous solution in advance at the very thin one deck mass percent concentration of the even coating of mould inner surface.For ease of the demoulding, in advance evenly applying very thin one deck mass percent concentration on the plaited surface having of the imitative shark scale groove negative template of nickel matter is 80% the SP 1 aqueous solution.(C) under the room temperature condition zeyssatite solidified surface after the demoulding is immersed in the deionized water; At power is that 800W～1200W, operating frequency are ultrasonic cleaning 10min～20min under the condition of 30KHz～50KHz; Dry up with N2 then, promptly obtain based on diatomaceous imitative shark composite anti-drag surface.With reference to Fig. 4, be the surperficial appearance structure synoptic diagram of imitative shark composite anti-drag that adopts above-mentioned technology to make.
The imitative shark composite anti-drag surface of adopting the present invention to process can directly apply to the place that needs drag reduction, such as be arranged on the conveying pipeline inner wall, the submarine navigation device outside surface.Also can be with imitative shark composite anti-drag of the present invention surface through immersing processing such as flow improver, the degassing; Obtain slowly to discharge the drag reduction surface of flow improver; Compare with the existing mode that directly applies flow improver on the surface that needs drag reduction like this; Mucous sticking power of self-lubricating and Rong Chiliang can not only be effectively improved, slow release can also be reached so that it all acts on the purpose of turbulent flow service area.Thereby have and improve flow improver and utilize usefulness, reduce consumption, reduce advantage such as operation and maintenance cost.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification sheets just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (6)
1. based on the making method on diatomaceous imitative shark composite anti-drag surface, comprise 1) the zeyssatite pretreatment technology, make the zeyssatite mixture; 2) tripolite filtering screen technology makes the zeyssatite mixture; 3) the wet base manufacture craft of zeyssatite is characterized in that, also comprises the steps:
4) high imitative shark scale groove pattern true to nature is copied into type:
(A) it is that nickel, thickness are the imitative shark scale groove negative template of nickel matter of 2.5mm～3.5mm that the clone method that adopts biological epidermis to duplicate template copies metal material;
(B) the imitative shark scale groove negative template of nickel matter being put into deionized water at ambient temperature, is that 800W～1200W, operating frequency are ultrasonic cleaning 10min～20min under the condition of 30KHz～50KHz at power, dries for use then;
5) the zeyssatite sintering curing straight forming under the imitative shark scale groove pattern constraint:
(A) with 4) plaited surface that has of the imitative shark scale groove negative template of the nickel matter that makes places on the sintering oven pedestal in the high temperature sintering furnace, then with 3 up) the wet base of zeyssatite that makes tips upside down on having on the plaited surface of the imitative shark scale groove negative template of nickel matter;
(B) in 1050 ℃～1150 ℃ TRs, carry out constant temperature sintering processes 1.5h～2.5h, carry out the demoulding after slowly reducing to room temperature, promptly obtain the zeyssatite solidified surface;
(C) under the room temperature condition zeyssatite solidified surface after the demoulding is immersed in the deionized water; At power is that 800W～1200W, operating frequency are ultrasonic cleaning 10min～20min under the condition of 30KHz～50KHz; Dry up with N2 then, promptly obtain based on diatomaceous imitative shark composite anti-drag surface.
2. the making method based on diatomaceous imitative shark composite anti-drag surface according to claim 1; It is characterized in that: in the step 5); For ease of the demoulding, in advance applying one deck mass percent concentration on the plaited surface having of the imitative shark scale groove negative template of nickel matter is 80% the SP 1 aqueous solution.
3. the making method based on diatomaceous imitative shark composite anti-drag surface according to claim 1, it is characterized in that: in the step 1), the zeyssatite pretreatment technology adopts following steps:
(A) under the room temperature condition, be immersion treatment 3min～5min in 1.5%～3.5% the HF solution at mass percent concentration, use the filter cloth of 5 μ m～20 μ m to filter then, obtain the first zeyssatite mixture zeyssatite;
(B) be under 80 ℃～90 ℃ conditions with the said first zeyssatite mixture in temperature; Immersion treatment 10min～20min in NH4, H2O2, H2O mixed solution (1: 2: 7); Use the filter cloth of 5 μ m～20 μ m to filter then, obtain the second zeyssatite mixture;
(C) the said second zeyssatite mixture is added deionized water at ambient temperature; At power is that 800W～1200W, operating frequency are under the condition of 30KHz～50KHz; Ultrasonic cleaning 10min～20min uses the filter cloth of 5 μ m～20 μ m to filter then, obtains the 3rd zeyssatite mixture.
4. according to claim 1,2 or 3 described making methods, it is characterized in that: step 2 based on diatomaceous imitative shark composite anti-drag surface) in, tripolite filtering screen process using following steps:
With 1) the zeyssatite mixture that makes adds deionized water at ambient temperature, uses the filter cloth of 30 μ m～40 μ m to filter then, filters the zeyssatite mixture of particle diameter more than 30 μ m, obtains the 4th zeyssatite mixture.
5. the making method based on diatomaceous imitative shark composite anti-drag surface according to claim 4 is characterized in that: in the step 3), the wet base manufacture craft of zeyssatite adopts following steps:
(A) under the room temperature condition, with 2) the zeyssatite mixture that obtains adds deionized water, and the preparation solid content is 50%～70% zeyssatite mud, old then 1d;
(B) in the mould of definite shape, adopt slip-casting shaping process to produce the wet base of zeyssatite;
(C) under the room temperature condition the wet base of zeyssatite is carried out preliminary natural air drying, water ratio is controlled at 60%～80%.
6. the making method based on diatomaceous imitative shark composite anti-drag surface according to claim 5 is characterized in that: for ease of the demoulding, in the step 3), be 80% the SP 1 aqueous solution in advance at mould inner surface coating one deck mass percent concentration.
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| CN103552653A (en) * | 2013-11-06 | 2014-02-05 | 山东理工大学 | Horizontal-stretching-based groove width-adaptive shark imitation resistance reducing pavement and control method for same |
| CN103552652A (en) * | 2013-11-06 | 2014-02-05 | 山东理工大学 | Longitudinal-stretching-based groove width-adaptive shark imitation resistance reducing pavement and control method for same |
| CN105255130A (en) * | 2015-11-27 | 2016-01-20 | 山东理工大学 | Wire rod for conducting 3D printing on multifunctional imitation shark composite resistance reduction structure |
| CN106043591A (en) * | 2016-06-14 | 2016-10-26 | 山东理工大学 | Drag reduction device used for water surface and underwater vehicle and manufacturing method of drag reduction device |
| CN106512884A (en) * | 2016-11-02 | 2017-03-22 | 山东理工大学 | A diatomite acid etching, moulding and reacting device for preparing a bionic composite functional structure |
| CN106810109A (en) * | 2017-02-13 | 2017-06-09 | 山东理工大学 | The technique for making bionical complex function structure using diatomite acid etching |
| CN114870439A (en) * | 2022-06-07 | 2022-08-09 | 华东理工大学 | Bionic structure falling film devolatilization tower inner component and devolatilization tower |
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| CN103552652A (en) * | 2013-11-06 | 2014-02-05 | 山东理工大学 | Longitudinal-stretching-based groove width-adaptive shark imitation resistance reducing pavement and control method for same |
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| CN106512884B (en) * | 2016-11-02 | 2018-04-06 | 山东理工大学 | Prepare the diatomite acid etching shaping reaction unit of bionical complex function structure |
| CN106810109A (en) * | 2017-02-13 | 2017-06-09 | 山东理工大学 | The technique for making bionical complex function structure using diatomite acid etching |
| CN106810109B (en) * | 2017-02-13 | 2018-11-30 | 山东理工大学 | The technique for making bionical complex function structural body using diatomite acid etching |
| CN114870439A (en) * | 2022-06-07 | 2022-08-09 | 华东理工大学 | Bionic structure falling film devolatilization tower inner component and devolatilization tower |
| CN114870439B (en) * | 2022-06-07 | 2024-03-08 | 华东理工大学 | Falling film devolatilization tower inner member with bionic structure and devolatilization tower |
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