CN102321466A - Reversible thermochromic solution system based on ionic liquid solvent and application thereof - Google Patents
Reversible thermochromic solution system based on ionic liquid solvent and application thereof Download PDFInfo
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- CN102321466A CN102321466A CN201110152621A CN201110152621A CN102321466A CN 102321466 A CN102321466 A CN 102321466A CN 201110152621 A CN201110152621 A CN 201110152621A CN 201110152621 A CN201110152621 A CN 201110152621A CN 102321466 A CN102321466 A CN 102321466A
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- chloride
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- ionic liquid
- reversible thermochromic
- choline chloride
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Abstract
The invention provides a reversible thermochromic solution system based on an ionic liquid solvent and application thereof. In the reversible thermochromic solution system, the solvent is a choline chloride-based ionic liquid;solute is nickel chloride or ferric chloride or a compound of nickel chloride and at least one of ferric chloride, copper chloride, cobalt chloride or tungsten chloride. The reversible thermochromic solution system provided by the invention has the advantages of simpleness in preparation, no vapor pressure, environment-friendliness, adjustable color and high thermochromic sensitivity, lasting reversible thermochromism and applicability in large-scale production; and the chromic temperature range is mainly focused between 20 DEG C and 150 DEG C. The thermochromic solution provided by the invention can be applied to macromoleclar polymers, that is, the reversible thermochromic solution system and polyvinylidene fluoride are blended to obtain a PVDF (Polyvinylidene Fluoride) composite material with a thermochromic effect.
Description
Technical field
The invention belongs to field of material preparation, be specifically related to a kind of novel thermochromic material system.
Background technology
Along with the progress and the industrial expansion of society, increasing rapidly of energy consumption becomes the global significant problem that influences social harmonious development and economic smooth running.Sun power is considered to a kind of emerging renewable energy source.Therefore, effective utilization of sun power becomes the top priority of current solution energy sustainable development.Yet the temperature of most of direct irradiation of sunlight body surface is in below 100 ℃ usually, and therefore, development can store or utilize the type material system of this low temperature environment heat significant.The compound, mixture of colour-change can take place when thermochromic material is meant temperature variation or be the thermochromism product that color indicator is made with them.Current most thermochromism solution system adopts water or organic solvent as solvent.Because evaporation can take place or decompose in water or organic solvent under reversible thermal cycling effect, therefore, certainly will have influence on the reversible stability of thermochromism solution system.
Summary of the invention
The invention provides a kind of reversible thermochromic solution system, especially in 20-150 ℃ of scope, have good reversible thermochromic effect based on ion liquid solvent.
A kind of reversible thermochromic solution system; Comprise solvent and solute, described solvent is a choline chloride 60 base ionic liquid, and described solute can be the compsn of at least a in iron(ic)chloride, cupric chloride, NSC 51149 or the tungsten chloride and nickelous chloride; Also nickelous chloride can be, iron(ic)chloride can also be.
Described choline chloride 60 base ionic liquid is that mol ratio is that 1: 2 choline chloride 60 and ethylene glycol mixtures or mol ratio is 1: 2 the choline chloride 60 and the mixed solution of Ucar 35.
Described choline chloride 60 base ionic liquid can prepare [A.P.Abbott, D.Boothby such as Abbott in Britain Leicester university by art methods; G.Capper; D.L.Davies and R.K.Rasheed, J.Am.Chem.Soc., 2004; 126,9142-9147] in detailed record is arranged.Specifically can adopt following method preparation:
Choline chloride 60 and terepthaloyl moietie perhaps 75 ℃ under are mixed choline chloride 60 and Ucar 35 according to mol ratio at 1: 2, promptly obtain choline chloride 60 base ionic liquid.The chemical that is adopted is the conventional chemical article, and wherein the molecular formula of choline chloride 60 is C
5H
14ClNO, products C as code are 67-48-1.
The concentration of described solute is its arbitrary concentration value below saturation concentration in described choline chloride 60 base ionic liquid.
Described solute both can be selected metal chloride for use, also can select the crystalline hydrate of metal chloride for use.That is, possible solute is: NiCl
2, FeCl
3, CuCl
2, CoCl
2, NiCl
26H
2O, FeCl
34H
2O, FeCl
36H
2O, CuCl
22H
2O or CoCl
22H
2O.
The present invention also provides the application of described reversible thermochromic solution system, especially the application in high molecular polymer.
The application of a kind of reversible thermochromic solution system in high molecular polymer comprises:
With described reversible thermochromic solution system and pvdf (PVDF) blend, the PVDF matrix material that obtains having thermo-chromic effects.
Among the present invention; Utilize choline chloride 60 base ionic liquid as solvent and since its by specific organic cation and negatively charged ion constitute, in room temperature or near the molten salt system that is in a liquid state under the room temperature, physical and chemical performance with a series of uniquenesses, compare with organic solvent with water; Has the advantage that reaction efficiency height, vp are extremely low and thermostability is high; And it is synthetic simply, cheap, purity is high, the convenient application, is a kind of " green " solvent; As the solvent of thermochromism solution, can effectively improve the thermostability of thermochromism solution.Simultaneously; Utilize transition-metal ion complex compound (iron(ic)chloride, cupric chloride, NSC 51149, tungsten chloride, nickelous chloride) as solute; It all has thermo-chromic effects in choline chloride 60 base ion liquid solvent; The thermochromism of the thermochromism solution system that the two compatibility is constituted is highly sensitive, and when temperature changed from low to high, this solution system was changed to the opaque attitude of dark color by the light-coloured transparent attitude; Simultaneously, when temperature changes from high to low, the color generation Back Up of this solution system, reversible color is lasting, and the discoloring temperature interval mainly concentrates on 20-150 ℃, is suitable for large-scale production.
The invention has the advantages that:
Reversible thermochromic solution system preparation based on ion liquid solvent of the present invention is simple, no vp, environmental protection; Color tunable and thermochromism are highly sensitive; Reversible color is lasting, and the discoloring temperature interval mainly concentrates on 20-150 ℃, is suitable for large-scale production.When temperature changed from low to high, solution system of the present invention was changed to the opaque attitude of dark color by the light-coloured transparent attitude; Simultaneously, when temperature changes from high to low, the color generation Back Up of solution system of the present invention.Thermochromism solution of the present invention is applicable to color-changing glass window, printing ink and organic polymer system.
Description of drawings
Fig. 1 is an absorption spectrum of taking nickelous chloride and the iron(ic)chloride combination solute and the thermo-chromic effects of the solution system of choline chloride 60 base ion liquid solvent formation among the embodiment 2.
Embodiment
Specify the present invention below in conjunction with embodiment, but the present invention is not limited to this.
Embodiment 1:
Choline chloride 60 ((Shanghai) Co., Ltd. buys from Aladdin reagent) and terepthaloyl moietie 75 ℃ under are mixed according to mol ratio at 1: 2, obtain choline chloride 60 base ionic liquid.With 5 gram NiCl
26H
2O is dissolved in the 40ml choline chloride 60 base ionic liquid, obtains to have the solution of thermochromism.This solution at room temperature (25-30 ℃) appears transparent dark greenly, and when temperature was elevated to 80 ℃, the color of solution became deep green, and when temperature was elevated to 120 ℃, the color of solution became mazarine, and temperature reduces, and returns to the room temperature color again.
Embodiment 2:
Choline chloride 60 ((Shanghai) Co., Ltd. buys from Aladdin reagent) and terepthaloyl moietie 75 ℃ under are mixed according to mol ratio at 1: 2, obtain choline chloride 60 base ionic liquid.With 5 gram NiCl
26H
2O is dissolved in the 40ml choline chloride 60 base ionic liquid, continues dissolving 0.01 gram FeCl then
3, i.e. acquisition has the solution of thermochromism.This solution at room temperature (25-30 ℃) presents yellow transparent, and when temperature was elevated to 70 ℃, the color of solution became green.Fig. 1 is the visible absorption spectrum of above-mentioned thermochromism solution under differing temps; This shows: along with the rising of temperature; Solution becomes significantly at the absorption characteristic peak of 600-800nm wave band, and obviously blue shift takes place, and the color that shows as solution changes to green gradually.Temperature reduces, and returns to the room temperature color again.
Embodiment 3:
Choline chloride 60 ((Shanghai) Co., Ltd. buys from Aladdin reagent) and terepthaloyl moietie 75 ℃ under are mixed according to mol ratio at 1: 2, obtain choline chloride 60 base ionic liquid.With 5 gram NiCl
2Be dissolved in the 40ml choline chloride 60 base ionic liquid, continue dissolving 0.001 gram CoCl then
22H
2O, i.e. acquisition has the solution of thermochromism.This solution at room temperature (25-30 ℃) appears transparent orange redly, and when temperature was elevated to 70 ℃, the color of solution became grape.Temperature reduces, and returns to the room temperature color again.
Embodiment 4:
Choline chloride 60 ((Shanghai) Co., Ltd. buys from Aladdin reagent) and Ucar 35 75 ℃ under are mixed according to mol ratio at 1: 2, obtain choline chloride 60 base ionic liquid.With 5 gram NiCl
2Be dissolved in the 40ml choline chloride 60 base ionic liquid, promptly obtain to have the solution of thermochromism.This solution at room temperature (25-30 ℃) presents transparent light green, and when temperature was elevated to 90 ℃, the color of solution became mazarine.Temperature reduces, and returns to the room temperature color again.
Embodiment 5:
Choline chloride 60 ((Shanghai) Co., Ltd. buys from Aladdin reagent) and terepthaloyl moietie 75 ℃ under are mixed according to mol ratio at 1: 2, obtain choline chloride 60 base ionic liquid.With 5 gram NiCl
26H
2O is dissolved in the 40ml choline chloride 60 base ionic liquid, obtains to have the solution of thermochromism.Get this thermochromism solution 1ml and 1 gram PVDF, 10ml N (DMF) blend, dry then, the PVDF matrix material that promptly obtains having thermo-chromic effects.Be white under this material room temperature, (40-70 ℃) presents blueness under the high temperature, and thermo-chromic effects is reversible.
Embodiment 6:
Choline chloride 60 ((Shanghai) Co., Ltd. buys from Aladdin reagent) and terepthaloyl moietie 75 ℃ under are mixed according to mol ratio at 1: 2, obtain choline chloride 60 base ionic liquid.With 3 gram FeCl
3Be dissolved in the 40ml choline chloride 60 base ionic liquid, obtain to have the solution of thermochromism.This solution at room temperature (25-30 ℃) appears transparent light yellowly, and when temperature was elevated to 110 ℃, the color of solution became wine red.Temperature reduces, and returns to the room temperature color again.
Claims (3)
1. reversible thermochromic solution system; Comprise solvent and solute; It is characterized in that described solvent is a choline chloride 60 base ionic liquid, described solute is compsn, nickelous chloride or the iron(ic)chloride of at least a and nickelous chloride in iron(ic)chloride, cupric chloride, NSC 51149 or the tungsten chloride.
2. reversible thermochromic solution system as claimed in claim 1 is characterized in that, described choline chloride 60 base ionic liquid is that mol ratio is that 1: 2 choline chloride 60 and ethylene glycol mixtures or mol ratio is 1: 2 the choline chloride 60 and the mixed solution of Ucar 35.
3. according to claim 1 or claim 2 the application of reversible thermochromic solution system in high molecular polymer; It is characterized in that; Comprise: with described reversible thermochromic solution system and polyvinylidene blending, the polyvinylidene fluoride composite material that obtains having thermo-chromic effects.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103242176A (en) * | 2013-05-15 | 2013-08-14 | 台州学院 | Functional ionic liquid based on choline chloride, and preparation method of same |
| CN104789206A (en) * | 2015-04-30 | 2015-07-22 | 浙江大学 | Low-temperature reversible thermochromic material and preparation method and application thereof |
| CN107868588A (en) * | 2017-12-12 | 2018-04-03 | 广东韩亚薄膜科技有限公司 | Reversible thermochromic coating and preparation method and application |
| CN114471084A (en) * | 2020-10-28 | 2022-05-13 | 中国石油化工股份有限公司 | Aromatic hydrocarbon-containing organic waste gas absorbent and preparation method and application thereof |
| CN115260831A (en) * | 2022-05-17 | 2022-11-01 | 上海鱼圆文具有限公司 | Ink capable of changing color along with writing environment and preparation method thereof |
| CN115960004A (en) * | 2022-08-11 | 2023-04-14 | 散裂中子源科学中心 | Novel ionic crystal with reversible piezothermal effect and preparation method thereof |
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| CN102031551A (en) * | 2010-11-04 | 2011-04-27 | 浙江大学 | Environment-friendly electroplate liquid for copper base plating layer and application method thereof |
-
2011
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|---|
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103242176A (en) * | 2013-05-15 | 2013-08-14 | 台州学院 | Functional ionic liquid based on choline chloride, and preparation method of same |
| CN103242176B (en) * | 2013-05-15 | 2015-12-09 | 台州学院 | Based on the functional ion liquid and preparation method thereof of choline chloride 60 |
| CN104789206A (en) * | 2015-04-30 | 2015-07-22 | 浙江大学 | Low-temperature reversible thermochromic material and preparation method and application thereof |
| CN107868588A (en) * | 2017-12-12 | 2018-04-03 | 广东韩亚薄膜科技有限公司 | Reversible thermochromic coating and preparation method and application |
| CN114471084A (en) * | 2020-10-28 | 2022-05-13 | 中国石油化工股份有限公司 | Aromatic hydrocarbon-containing organic waste gas absorbent and preparation method and application thereof |
| CN115260831A (en) * | 2022-05-17 | 2022-11-01 | 上海鱼圆文具有限公司 | Ink capable of changing color along with writing environment and preparation method thereof |
| CN115960004A (en) * | 2022-08-11 | 2023-04-14 | 散裂中子源科学中心 | Novel ionic crystal with reversible piezothermal effect and preparation method thereof |
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