CN2687671Y - Powder wettability rapid measuring device - Google Patents

Abstract

The utility model relates to a powder wettability rapid measuring device, belonging to the technical field of chemical industry detection, and comprising a scale indication device, a jar for controlling the liquid level, and a glass bath with a positioning net for the liquid level which are communicated by glass pipes. The measuring of the integral device is carried out according to the procedures of processing and loading the measured power sample, injecting and regulating liquid for measuring, regulating coloured water column and entire experimentation. The utility model has simple structure and easy operation and can rapidly and exactly measure the wettability of the liquid to the power.

Description

A kind of powder wettability fast measuring device

Technical field

The utility model relates to a kind of powder wettability fast measuring device, relates to the wetting ability of a kind of different powder to same liquid or rather, and powder perhaps of the same race is to the wetting ability determinator of different liquids.Belong to chemical industry detection technique field.

Background technology

In the production and application process of powder, usually relate to the surface coating modification of powder, the surface modification of powder is determining the product quality of powder and the application of product.The mensuration of powder surface modification often will relate to this notion of moisten contact angle.So-called contact angle is meant and drips a drop, the solid-liquid on the solid surface-gas three-phase point of interface place, the angle that its gas-liquid interface is become when being clipped in wherein with solid-liquid interface two tangent lines to liquid phase on a solid level plane.

According to the Washburn equation as can be known, square (the Δ P) of the pressure differential that causes if liquid because capillary action infiltration radius is in the kapillary of R, compresses the gas in the powder bed in the liquid process of osmosis ²Be the function of time t, its equation is:

${\left(\mathrm{\ΔP}\right)}^2=\frac{\mathrm{\β\γ}\cos \mathrm{\θ}}{\mathrm{\η}}t---\left(1\right)$

In the formula: the surface tension of γ-liquid; β-the parameter relevant with the character of powder bed itself; The viscosity of η-liquid; θ-moisten contact angle;

Order: $K=\frac{\mathrm{\β\γ}\cos \mathrm{\θ}}{\mathrm{\η}}---\left(2\right)$

: $\mathrm{\θ}=\arccos \left(\frac{\mathrm{K\η}}{\mathrm{\β\γ}}\right)---\left(3\right)$

In the formula: η/γ is only relevant with the character of wetting liquid, can check in, and the K value also can obtain, and key is to determine the β value.General is the liquid of zero degree with a kind of wetting angle to sample, promptly use perfect wetting liquid (liquid that wetting state is best, its corresponding cos θ=1, θ=0 °) to experimentize, obtain corresponding β value, just can be determined at the contact angle of other liquid and this powder under the equal experiment condition by it.

In the production and scientific research of reality, often be not easy to find the liquid that makes the powder complete wetting, the β value just is difficult to determine.Therefore, generally all be used for measuring relative moisten contact angle.Make sample at liquid L and the better liquid L of wetting state ₀In contact angle be respectively θ and θ ₀, (the Δ P) that records ²The slope of-t near linear is respectively K and K ₀, same sample is at L and L ₀In the β value identical, θ＞θ ₀, make θ ₀=0 °, then as can be known: β=K by (2) formula ₀η ₀/ γ ₀Thereby feeler θ can connect:

$\mathrm{\θ}=\arccos \left(\frac{\mathrm{K\η}{\mathrm{\γ}}_0}{K_0{\mathrm{\η}}_0\mathrm{\γ}}\right)=\arccos \left(C\frac{K}{K_0}\right)$ Wherein $C=\frac{{\mathrm{\η\γ}}_0}{{\mathrm{\η}}_0\mathrm{\γ}}---\left(4\right)$

η and γ and η in the formula ₀And γ ₀Be respectively the better liquid L of liquid L and wetting state ₀Viscosity and surface tension.For liquid of the same race, feeler connects $\mathrm{\θ}=\arccos \left(\frac{K}{K_0}\right)---\left(5\right)$ The θ that determines in the formula (4) only has relative meaning, and has bigger using value.Here with θ ₀Be made as zero degree, the sample of sample of the same race or similar component, structure is had contrast meaning preferably.And to the sample of heterogeneity, structure, they are at L ₀In wetting angle be not wait, if be made as zero degree, on qualitative, do not have what problem, on Quantitative study, have the meaning of relative contrast.

In most cases, we often need to contrast the wetting ability of different powders to same liquid, and perhaps powder of the same race is to the wetting ability of different liquids.For example, powder-modified front and back are to the comparison of the wetting ability of same liquid.If powder is to liquid L before the modification ₀Wetting for perfection, recording systematic parameter is β, and this is can be with this β value as maximum β value, and then obtains that each powder is to the feeler θ that connects of this liquid after the modification, and computing formula is as follows:

$\mathrm{\θ}=\arccos \left(\frac{K_1}{K_0}\right)=\arccos \left(\frac{{\mathrm{\β}}_1}{{\mathrm{\β}}_0}\right)=\arccos \left(\frac{{\mathrm{\β}}_1}{{\mathrm{\β}}_{\max }}\right)$

K in the formula ₀, K ₁Be respectively modification front and back (Δ P) ²The slope of-t graph of a relation straight line, β ₀, β ₁Be respectively the measured systematic parameter in powder-modified front and back.

The contact angle of liquid on powder, though extremely important in practice, measure relatively difficulty.In actual applications, the moisten contact angle of powder often has only relative meaning, and it is very difficult to measure its accurate data.

Summary of the invention

The purpose of this utility model be to provide a kind of simple in structure, cheap, fast measuring powder to liquid phase to the wettability determination device.

In order to achieve the above object, the technical scheme that its technical matters that solves the utility model adopts is: this device comprises wide-necked bottle, rubber stopper, funnel, the level control (LC) pipe, indicating device, proofed sleeve, quartz ampoule, glass guide channel, lifting table, wooden unit, wide-necked bottle has mouth, and two holes are arranged on the rubber stopper, has piston on the funnel, the level control (LC) pipe racks has wireway, catheter, two air guide mouths of pipe, two drain mouths of pipe, indicating device has rule, coloured water column, glass tube (through hydrophobic treatments), two stop,threeways, coloured water column steady arm, two piston mouths, quartz ampoule has two quartzy mouths of pipe, quartz ampoule pipe box, glass guide channel have two height networks for location, and lifting table has the lifting table knob.It is characterized in that funnel, level control (LC) pipe are inserted in respectively in the hole of rubber stopper, in the rubber stopper stopper wide-necked bottle bottleneck, wide-necked bottle is placed on the wooden unit, regulates the liquid level control tube and the degree of depth of quartz ampoule in glass guide channel by the height network for location.

The beneficial effects of the utility model are, the related verifying attachment of the utility model has device simple, and are easy and simple to handle and can fast, accurately measure the wetting property of liquid to pressed powder, at metallurgy, and oil, the application of aspects such as medicine and agricultural is very extensive.

Description of drawings

Fig. 1 is the composition structural drawing of the related determinator of the utility model;

Embodiment

Below in conjunction with accompanying drawing and a preferred embodiment utility model is described further.

As shown in Figure 1 and Figure 2, the 1st, wide-necked bottle, the 2nd, wide-mouth bottleneck, the 3rd, rubber stopper, the 4th, hole, the 5th, hole, the 6th, funnel, the 7th, piston, the 8th, level control (LC) pipe.The 9th, wireway, the 28, the 29th, the air guide mouth of pipe, the 10th, catheter, the 27, the 30th, the drain mouth of pipe, the 11st, indicating device, the 12nd, rule, the 13rd, coloured water column, the 14th, glass tube (through hydrophobic treatments), the 15th, stop,threeway, the 16th, stop,threeway, the 17th, coloured water column steady arm, the 33, the 34th, piston mouth, the 18th, proofed sleeve, the 19th, quartz ampoule, the 31, the 32nd, the quartzy mouth of pipe, the 20th, quartz ampoule pipe box, the 21st, glass guide channel, the 22, the 23rd, height network for location, the 24th, lifting table, the 25th, lifting table knob, the 26th, wooden unit.Fig. 2, the 35th, measure and use liquid, the 36th, filter the scraps of paper, the 34th, determined powder sample.

Whole device constitutes and test, is undertaken by following several steps

At first determined powder sample 34 was dried by the fire 2 hours down at 100 ℃, place drying bottle stand-by then.Go out the filtration scraps of paper 36 of a certain size diameter with drift, keep flat, the quartz ampoule 19 of clean dry is inserted quartz ampoule sleeve pipe pipe boxes 20 into quartz ampoule pipe box 20 bottoms, and fixed, determined then powder sample 34, the powder of whenever adding some points during the dress sample just strikes several following on desk, allows powder compress as far as possible, sample hose is filled to 2/3 height, write down this height, weigh then, height, the density of powder bed is identical when guaranteeing to test at every turn, if the powder bed density variation surpasses 1%, should adorn sample again.Utilize proofed sleeve 18 indicating device 11 and quartz ampoule 19 to be coupled together by the quartzy mouth of pipe 32 and piston mouth 33.

Measure injection and adjusting with liquid

To measure with liquid 35 by funnel 6, inject in the wide-necked bottle 1, liquid level is at the air guide mouth of pipe below 28, under certain pressure, catheter 10 is filled with mensuration liquid 32, wide-necked bottle 1 is communicated with glass guide channel 21, closure piston 7, the height of the drain mouth of pipe 30 and the air guide mouth of pipe 29 is determined by height network for location 23, utilize wide-necked bottle 1 and extraneous pressure differential, make and reach following balance by wireway 9 and catheter 10 with measuring with liquid 35 in wide-necked bottle 1 and glass guide channel 21: because there is pressure differential in sealing wide-necked bottle 1 with the external world, measures and use liquid 35 to exist a liquid level poor at wide-necked bottle 1 and 21 of glass guide channels, the air guide mouth of pipe 29 is immersed in below the liquid level just.When the liquid level of glass guide channel 1 descends, the air guide mouth of pipe 29 leaves liquid level, air enters wide-necked bottle 1 by wireway 9, pressure in the wide-necked bottle 1 raises, and mensuration is injected in the glass guide channel 21 by catheter 10 with liquid 35, makes liquid level rising in the glass guide channel 21, below the salty new immersed in liquid level of wireway, reach new balance, so circulation can make the liquid level of glass guide channel keep metastable height.

The adjusting of coloured water column

Coloured water column 13 is used for indicative function, utilizes coloured water column steady arm 17, regulates coloured water column 13 to certain position by stop,threeway 15,16.After coloured water column 13 positions mix up, glass tube 14 is communicated with atmosphere by stop,threeway 16, glass tube 14 is only communicated with quartz ampoule 19 by piston 15.

Experimentation

After the quartz ampoule 19 that installs determined powdered sample 34 connected with indicating device 11, slowly put into the glass guide channel 21 that has regulated liquid level, the degree of depth of placing is controlled by height network for location 22, enter in the quartz ampoule 19 with liquid 35 owing to measure, produce certain pressure, drive coloured water column 13 and move, the distance that the record certain hour moves at interval, or move a certain distance the used time, carry out data processing then.

Claims (6)

1, a kind of powder wettability fast measuring device is characterized in that: comprise scale indicating device, glass guide channel, wide-necked bottle, connect and compose a fast measuring device with glass tube between them.

2, powder wettability fast measuring device as claimed in claim 1, it is characterized in that: described scale indicating device comprises rule [12], coloured water column [13], glass tube [14], coloured water column steady arm [17], T shape stop,threeway [15], [16]; Glass tube [14] communicates with the T shape stop,threeway [16] in left side, and its right side communicates with stop,threeway [15]; One coloured water column [13] is arranged in running through glass tube [14], and water column moves at glass tube [14], observes its displacement by rule [12].

3, powder wettability fast measuring device as claimed in claim 1, it is characterized in that: there is a lifting table [24] described glass guide channel [21] below, the quartz glass tube [19] that the band scale is arranged in the groove, pipe box [20] is inserted in its lower end, and the upper end communicates with T shape stop,threeway [15].

4, as claim 1 or 3 described powder wettability fast measuring devices, it is characterized in that: described quartz glass tube [19], pipe box [20] locate to be equipped with the filtration scraps of paper [36].

5, as claim 1 or 3 described powder wettability fast measuring devices, it is characterized in that: described glass guide channel [21] has two height networks for location [22], [23].

6, powder wettability fast measuring device as claimed in claim 1, it is characterized in that: described wide-necked bottle [1] has bottleneck [2], rubber stopper [3] is arranged on it, rubber stopper reward has two holes [4,5], and piston [7] is arranged on the funnel [6], and level control (LC) pipe [8] has wireway [9], catheter [10], they have two the air guide mouths of pipe [28,29] and the drain mouth of pipe [27,30] respectively.

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