CN103396761A - Method for adjusting relative humidity - Google Patents
Method for adjusting relative humidity Download PDFInfo
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- CN103396761A CN103396761A CN2013103313554A CN201310331355A CN103396761A CN 103396761 A CN103396761 A CN 103396761A CN 2013103313554 A CN2013103313554 A CN 2013103313554A CN 201310331355 A CN201310331355 A CN 201310331355A CN 103396761 A CN103396761 A CN 103396761A
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- methylimidazole
- bis trifluoromethyl
- trifluoromethyl sulfimide
- ionic liquid
- relative humidity
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Abstract
The invention discloses a method for adjusting relative humidity. The method comprises a step of adjusting the relative humidity at a certain temperature by using two-component ionic liquid/water saturated solution and three-component an ionic liquid/ionic liquid/water saturated solution. Compared with a conventional method for adjusting the relative humidity, the method provided by the invention can widen an adjustment range of the relative humidity, specify the relative humidity and diversify the relative humidity.
Description
Technical field
The present invention relates to a kind of method of regulating relative humidity.
Background technology
Regulation of relative humidity all is widely used in a lot of fields, comprises in daily life, and in scientific research, and in application production.(as indoor, in car, in tent, the aircraft airship is interior) in daily life, relative humidity is adjusted in certain limit in be everlasting sealing or accurate enclosed space, so that the mankind feel the most comfortable.In scientific research (as the water absorbability experiment, the character impact research of relative humidity on material), relative humidity also is adjusted to certain value in be everlasting sealing or accurate enclosed space, can make like this experiment have repeatability, accuracy.In industrial production, relative humidity also is adjusted to certain value (as the vegetable cultivation, the heritage archive protection) in be everlasting sealing or accurate enclosed space, application is produced and carry out effectively more economically.
Ionic liquid is a kind of salt by being in a liquid state in organic cation and inorganic or organic anion forms, near room temperature is very wide temperature range.And conventional salt is the ion solid compounds, and conventional molecular solvent is the molecule liquefied compound.Ionic liquid has the special property that is different from salt and molecular solvent: satisfactory stability; Insignificant vapour pressure; The liquid temperature wide ranges; Solvability is strong; The structure designability.
At present, the method for regulation of relative humidity is mainly to utilize two component saturated salt solutions, and the method for this regulation of relative humidity is the advantage such as cheap, convenient use specifically.
But, also there are some limitation: as utilize two component saturated salt solutions adjusting relative humidity scopes very limited, do not have good designability, and some specific rh values can not be adjusted to.
Summary of the invention
The purpose of this invention is to provide a kind of method of regulating relative humidity.
Moisture control composition provided by the invention is following composition a or b:
Described composition a is comprised of two components: ionic liquid and water;
Described composition b is comprised of three components: two kinds of different ionic liquids and water;
Described ionic liquid is hydrophobic ionic liquid;
And described composition a or b are the saturated aqueous solution of ionic liquid.
In above-mentioned composition, described ionic liquid consists of positively charged ion and negatively charged ion;
Wherein, described positively charged ion is selected from least a in imidazoles, pyridines, quaternary amines, season phosphine class, guanidine class, pyroles, thiazoles, triazole class, sulphur class, hydroxyl functional and functional amido, specifically be selected from 1-hexyl-3-Methylimidazole, 1-butyl-3-Methylimidazole, 1-Methylimidazole, 1-methyl-3-Methylimidazole, 1-ethyl-3-methylimidazole, 1,2-methylimidazole, 1,3-methylimidazole, 1, at least a in 2,3-tri-methylimidazolium, 1-hydroxyethyl-3-Methylimidazole, N-butyl-pyridinium and tetramethyl-quaternary phosphonium;
Described negatively charged ion is selected from least a in bis trifluoromethyl sulfimide class, phosphofluoric acid class, Tetrafluoroboric acid class, trifluoromethane sulfonic acid class, trifluoromethyl acetate type, nitrose, acetate type, halogen, amido acids and cholic acid class ionic liquid, specifically is selected from least a in bis trifluoromethyl sulfimide, phosphofluoric acid and Tetrafluoroboric acid;
described ionic liquid specifically is selected from 1-n-hexyl-3-Methylimidazole Tetrafluoroboric acid, 1-n-hexyl-3-Methylimidazole bis trifluoromethyl sulfimide, 1-n-hexyl-3-Methylimidazole phosphofluoric acid, 1-butyl-3-Methylimidazole bis trifluoromethyl sulfimide, N-butyl-pyridinium bis trifluoromethyl sulfimide, tetramethyl-quaternary phosphonium bis trifluoromethyl sulfimide, 1-Methylimidazole bis trifluoromethyl sulfimide, 1-methyl-3-Methylimidazole bis trifluoromethyl sulfimide, 1-ethyl-3-methylimidazole bis trifluoromethyl sulfimide, 1, 2-methylimidazole bis trifluoromethyl sulfimide, 1, 3-methylimidazole bis trifluoromethyl sulfimide, 1, 2, any one in 3-tri-methylimidazolium bis trifluoromethyl sulfimide and 1-hydroxyethyl-3-Methylimidazole bis trifluoromethyl sulfimide,
In described composition a, the mass ratio of ionic liquid and water is 1:3;
In described composition b, the total mass of two kinds of ionic liquids and the mass ratio of water are 1:3; Mass ratio between two kinds of ionic liquids is 1:1.
In described moisture control composition, moisture control is specially humidity and reduces or raise.
The method of adjusting relative humidity provided by the invention, comprise the steps: that aforementioned moisture control composition provided by the invention is placed in to space carries out moisture control.
In aforesaid method, the temperature in described space is 20 ℃～40 ℃, is specially 30-40 ℃ or 30 ℃ or 40 ℃.
The time of described adjusting, less than 24 hours, is specially 9 hours.
Described space is enclosed space.
The method specifically can be: purpose saturated solution and the relative humidity indicating gauge that will prepare are put into space, and the rh value after the relative humidity reading is constant is the equilibrium relative humidity value.
The present invention is based on following principle: for the saturated ionic liquid aqueous solution of two components, number of components is 2, and the number of phases is 3; To multicomponent system, number of components is N, and the number of phases is N+1; Degree of freedom by system in phase rule principle (being degree of freedom=number of components-number of phases+2) two kinds of situations as can be known is all 1, thereby just can control by controlling this variable relative humidity of temperature.
Compared with prior art, the beneficial effect that has at least of the present invention is as follows.
The relative humidity that the present invention regulates is more extensive, and because ionic liquid has designability, for the saturated ionic liquid solution system of two components, the zwitterion of ionic liquid can obtain 10 after arranging
18The combination of planting, for multicomponent system, such as after 3 component ionic liquids/ionic liquid combination, obtaining 10
36The combination of planting, our method have enlarged the scope that conventional saturated salt solution is regulated relative humidity.
The relative humidity that the present invention regulates is more specific, limited amount due to conventional saturated salt solution, the relative humidity designability of regulating is not strong, but ionic liquid has very strong designability (comprising negatively charged ion, positively charged ion, chain length, substituting group, functionalization, temperature, mixing), and this strong designability is conducive to the rh value of goal of regulation and control.
The relative humidity that the present invention regulates is more diversified, limited amount due to conventional saturated salt solution, thereby regulate the behavior that relative humidity there will be interruption, be that some rh value can not obtain, with the saturated ionic liquid aqueous solution system of two components with multicomponent system, can fill these interruption relative humidity.
Regulation of relative humidity agent of the present invention can circulate and repeatedly use, and by after repeatedly recycling, still can keep the regulation of relative humidity effect.
Embodiment
The present invention is further elaborated below in conjunction with specific embodiment, but the present invention is not limited to following examples.Described method is ordinary method if no special instructions.Described starting material all can obtain from open commercial sources if no special instructions.
Embodiment 1, moisture control composition a
to become anion ion liquid by 60g deionized water and 20g and (be respectively 1-n-hexyl-3-Methylimidazole Tetrafluoroboric acid, 1-n-hexyl-3-Methylimidazole bis trifluoromethyl sulfimide or 1-n-hexyl-3-Methylimidazole phosphofluoric acid) the composition a that forms joins in the middle of the beaker of 250mL, with ultrasonic method, mixed after 10 minutes standing 30 minutes, put into afterwards 300 * 300 * 275mm vacuum drying oven and put into simultaneously the relative humidity indicator gauge, 30 ℃ of design temperatures, after 9 hours, the registration of relative humidity table is substantially constant, the humidity value of this moment can be considered the equilibrium relative humidity value.
Above-mentioned 3 kinds of rh values that become the ionic liquid adjusting of cloudy son are respectively 76.3%, 78.0%, 82.9%.
In contrast, in above-mentioned loft drier, while not putting into composition a, the relative humidity in loft drier is 30%.
This shows that the rh value that negatively charged ion is regulated ionic liquid affects very remarkable.
Embodiment 2, moisture control composition a
to become cationic ionic liquid by 60g deionized water and 20g and (be respectively 1-butyl-3-Methylimidazole bis trifluoromethyl sulfimide, N-butyl-pyridinium bis trifluoromethyl sulfimide or tetramethyl-quaternary phosphonium bis trifluoromethyl sulfimide) the composition a that forms joins in the middle of the beaker of 250mL, with ultrasonic method, mixed after 10 minutes standing 30 minutes, put into afterwards 300 * 300 * 275mm vacuum drying oven and put into simultaneously the relative humidity indicator gauge, 30 ℃ of design temperatures, after 9 hours, the registration of relative humidity table is substantially constant, the humidity value of this moment can be considered the equilibrium relative humidity value.
Above-mentioned 3 kinds of rh values that become the ionic liquid adjusting of sun are respectively 77.9%, 89.0%, 92.6%.
In contrast, in above-mentioned loft drier, while not putting into composition a, the relative humidity in loft drier is 20%.
This shows that the rh value that positively charged ion is regulated ionic liquid affects very remarkable.
Embodiment 3, moisture control composition a
to by the ionic liquid of 60g deionized water and 20g change chain length, (be respectively 1-Methylimidazole bis trifluoromethyl sulfimide, 1-methyl-3-Methylimidazole bis trifluoromethyl sulfimide, 1-ethyl-3-methylimidazole bis trifluoromethyl sulfimide, 1-butyl-3-Methylimidazole bis trifluoromethyl sulfimide or 1-n-hexyl-3-Methylimidazole bis trifluoromethyl sulfimide) the composition a that forms joins in the middle of the beaker of 250mL, with ultrasonic method, mixed after 10 minutes standing 30 minutes, put into afterwards 300 * 300 * 275mm vacuum drying oven and put into simultaneously the relative humidity indicator gauge, 30 ℃ of design temperatures, after 9 hours, the registration of relative humidity table is substantially constant, the humidity value of this moment can be considered the equilibrium relative humidity value.
Above-mentioned 5 kinds of rh values that become the ionic liquid adjusting of chain length are respectively 80.8%, 80.8%, 79.2%.77.9%,78.0%。
In contrast, in above-mentioned loft drier, while not putting into composition a, the relative humidity in loft drier is 40%.
This shows that the rh value that cationic chain length is regulated ionic liquid affects and can ignore.
Embodiment 4, moisture control composition a
to become substituent ionic liquid by 60g deionized water and 20g and (be respectively 1, 2-methylimidazole bis trifluoromethyl sulfimide, 1, 3-methylimidazole bis trifluoromethyl sulfimide or 1, 2, 3-tri-methylimidazolium bis trifluoromethyl sulfimide) the composition a that forms joins in the middle of the beaker of 250mL, with ultrasonic method, mixed after 10 minutes standing 30 minutes, put into afterwards 300 * 300 * 275mm vacuum drying oven and put into simultaneously the relative humidity indicator gauge, 30 ℃ of design temperatures, after 9 hours, the registration of relative humidity table is substantially constant, the humidity value of this moment can be considered the equilibrium relative humidity value.
Above-mentioned 3 kinds of rh values that become substituent ionic liquid adjusting are respectively 79.9%, 80.8%, 83.9%.
In contrast, in above-mentioned loft drier, while not putting into composition a, the relative humidity in loft drier is 30%.
This shows that the rh value impact that substituting group is regulated ionic liquid is not very remarkable.
Embodiment 5, moisture control composition a
The composition a that will be comprised of the ionic liquid (being respectively 1-ethyl-3-methylimidazole bis trifluoromethyl sulfimide or 1-hydroxyethyl-3-Methylimidazole bis trifluoromethyl sulfimide) of 60g deionized water and 20g change functionalization group joins in the middle of the beaker of 250mL, with ultrasonic method, mixed after 10 minutes standing 30 minutes, put into afterwards 300 * 300 * 275mm vacuum drying oven and put into simultaneously the relative humidity indicator gauge, 30 ℃ of design temperatures, after 9 hours, the registration of relative humidity table is substantially constant, and the humidity value of this moment can be considered the equilibrium relative humidity value.
Above-mentioned 2 kinds of rh values that become the ionic liquid adjusting of functionalization group are respectively 79.2%, 88.7%.
In contrast, in above-mentioned loft drier, while not putting into composition a, the relative humidity in loft drier is 40%.
This shows that the rh value of regulating after the functionalization group increases, and the rh value that the functionalization group is regulated ionic liquid affects very remarkable.
Embodiment 6, moisture control composition a
Composition a1 or a2 are joined in the middle of the beaker of 250mL, with ultrasonic method, mixed after 10 minutes standing 30 minutes, put into afterwards 300 * 300 * 275mm vacuum drying oven and put into simultaneously the relative humidity indicator gauge, after design temperature is 30 ℃ or 40 ℃, after 9 hours, the registration of relative humidity table is substantially constant, and the humidity value of this moment can be considered the equilibrium relative humidity value.
Composition therefor a1 and a2 are composed as follows:
The composition a1 that is formed by the ionic liquid 1-butyl-3-methyl imidazolium bis trifluoromethyl sulfimide of 60g deionized water and 20g;
By the 60g deionized water and and the composition a2 that ionic liquid 1-n-hexyl-3-Methylimidazole bis trifluoromethyl sulfimide forms of 20g;
Above-mentioned composition a1 is respectively 77.9%, 65.0% at the rh value of 30 ℃ or 40 ℃ adjustings;
Composition a2 is respectively 78.0%, 64.7% at the rh value of 30 ℃ or 40 ℃ adjustings.
In contrast, in above-mentioned loft drier, while not putting into composition a1 or a2, the relative humidity in loft drier is 30%(30 ℃), 27%(40 ℃).
This shows that temperature rising relative humidity reduces, and temperature is very remarkable on the impact of ionic liquid aqueous solution adjusting rh value.
Embodiment 7, moisture control composition b
To by the composition b that 60g deionized water, 20g1-Methylimidazole bis trifluoromethyl sulfimide and 20g1-n-hexyl-3-Methylimidazole bis trifluoromethyl sulfimide forms, be joined in the middle of the beaker of 250mL, with ultrasonic method, mixed after 10 minutes standing 30 minutes, put into afterwards 300 * 300 * 275mm vacuum drying oven and put into simultaneously the relative humidity indicator gauge, 30 ℃ of design temperatures, after 9 hours, the registration of relative humidity table is substantially constant, and the humidity value of this moment can be considered the equilibrium relative humidity value.
The rh value that said composition b regulates is 77.1%.
In contrast, in above-mentioned loft drier, while not putting into composition b, the relative humidity in loft drier is 40%.
With the rh value that 1-Methylimidazole bis trifluoromethyl sulfimide is regulated, be only 80.8%.
With the rh value that 1-n-hexyl-3-Methylimidazole bis trifluoromethyl sulfimide is regulated, be only 78.0%.
Claims (7)
1. moisture control composition is following composition a or b:
Described composition a is comprised of two components: ionic liquid and water;
Described composition b is comprised of three components: two kinds of different ionic liquids and water;
Described ionic liquid is hydrophobic ionic liquid;
And described composition a or b are the saturated aqueous solution of ionic liquid.
2. composition according to claim 1 is characterized in that: described ionic liquid forms by positively charged ion and negatively charged ion;
Wherein, described positively charged ion is selected from least a in imidazoles, pyridines, quaternary amines, season phosphine class, guanidine class, pyroles, thiazoles, triazole class, sulphur class, hydroxyl functional and functional amido, specifically be selected from 1-n-hexyl-3-Methylimidazole, 1-butyl-3-Methylimidazole, 1-Methylimidazole, 1-methyl-3-Methylimidazole, 1-ethyl-3-methylimidazole, 1,2-methylimidazole, 1,3-methylimidazole, 1, at least a in 2,3-tri-methylimidazolium, 1-hydroxyethyl-3-Methylimidazole, N-butyl-pyridinium and tetramethyl-quaternary phosphonium;
Described negatively charged ion is selected from least a in bis trifluoromethyl sulfimide class, phosphofluoric acid class, Tetrafluoroboric acid class, trifluoromethane sulfonic acid class, trifluoromethyl acetate type, nitrose, acetate type, halogen, amido acids and cholic acid class ionic liquid, specifically is selected from least a in bis trifluoromethyl sulfimide, phosphofluoric acid and Tetrafluoroboric acid;
described ionic liquid specifically is selected from 1-n-hexyl-3-Methylimidazole Tetrafluoroboric acid, 1-n-hexyl-3-Methylimidazole bis trifluoromethyl sulfimide, 1-n-hexyl-3-Methylimidazole phosphofluoric acid, 1-butyl-3-Methylimidazole bis trifluoromethyl sulfimide, N-butyl-pyridinium bis trifluoromethyl sulfimide, tetramethyl-quaternary phosphonium bis trifluoromethyl sulfimide, 1-Methylimidazole bis trifluoromethyl sulfimide, 1-methyl-3-Methylimidazole bis trifluoromethyl sulfimide, 1-ethyl-3-methylimidazole bis trifluoromethyl sulfimide, 1, 2-methylimidazole bis trifluoromethyl sulfimide, 1, 3-methylimidazole bis trifluoromethyl sulfimide, 1, 2, any one in 3-tri-methylimidazolium bis trifluoromethyl sulfimide and 1-hydroxyethyl-3-Methylimidazole bis trifluoromethyl sulfimide.
3. according to claim 1-2 arbitrary described compositions, it is characterized in that: in described composition a, the mass ratio of ionic liquid and water is 1:3;
In described composition b, the total mass of two kinds of ionic liquids and the mass ratio of water are 1:3; Mass ratio between two kinds of ionic liquids is 1:1.
4. a method of regulating relative humidity, comprise the steps: that the arbitrary described moisture control composition of claim 1-3 is placed in to space carries out moisture control.
5. method according to claim 4, it is characterized in that: the temperature in described space is 20 ℃～40 ℃.
6. according to claim 4 or 5 described methods, it is characterized in that: the time of described adjusting, less than 24 hours, is specially 9 hours.
7. according to claim 4-6 arbitrary described methods, it is characterized in that: described space is enclosed space.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105159344A (en) * | 2015-08-14 | 2015-12-16 | 中南大学 | Saturated salt type humidity generator capable of adjusting humidity rapidly |
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| CN102252933A (en) * | 2011-06-27 | 2011-11-23 | 大连工业大学 | Method for measuring moisture absorption performance of wallpaper |
| CN102335545A (en) * | 2010-07-22 | 2012-02-01 | 中国科学院理化技术研究所 | Dehumidifying agent for air dehumidification, method and device for air dehumidification |
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- 2013-08-01 CN CN201310331355.4A patent/CN103396761B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2291660Y (en) * | 1996-09-25 | 1998-09-16 | 电子工业部第四十九研究所 | Saturated salt type humidity generator capable of adjusting temperature |
| CN101059476A (en) * | 2007-05-29 | 2007-10-24 | 上海师范大学 | Electrochemical probe type humidity sensor |
| US20110053034A1 (en) * | 2007-06-12 | 2011-03-03 | Hitoshi Mitsui | Ionic liquid and method for producing the same |
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| CN101532888A (en) * | 2009-04-24 | 2009-09-16 | 中国农业大学 | Calibration system and calibration method of humidity-temperature sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105159344A (en) * | 2015-08-14 | 2015-12-16 | 中南大学 | Saturated salt type humidity generator capable of adjusting humidity rapidly |
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