CN102268241A - Phase transition material for cooling with phase transition temperature of 12-29 DEG C and preparation method thereof - Google Patents
Phase transition material for cooling with phase transition temperature of 12-29 DEG C and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a phase transition material for cooling with a phase transition temperature of 12-29 DEG C and a preparation method thereof. The phase transition material of the invention comprises the following components on a weight basis: sodium sulfate decahydrate, a phase transition temperature adjusting agent, a humectant, a nucleating agent, a pH-value adjusting agent, and a thickening agent; the preparation method comprises the following steps: well mixing the humectant and the nucleating agent, adding the pH-value adjusting agent to adjust the pH value, adding the phase transition temperature adjusting agent and the thickening agent, well mixing, adding sodium sulfate decahydrate, stirring at 12-29 DEG C to melt, stopping heating, continuing to stir, and cooling to obtain the phase transition material. The phase transition material of the invention has the advantages of no toxicity, good stability, large cold storage capacity, and the like, and with the addition of the phase transition temperature adjusting agent, the phase transition material has a phase transition temperature which is adjustable between 12 and 29 DEG C, has long-term stable physical cooling effect, and is applicable to heat absorption and cooling.
Description
Technical field
The invention belongs to the materials chemistry field, relate to a kind of phase change material and preparation method thereof, be specifically related to a kind of phase change material absorbing and cooling temperature, 12-29 ℃ of transformation temperatures and preparation method thereof that is used for.
Background technology
Fever initial stage and low temperature fever generally adopt the method for Physical temperature-lowering to bring down a fever.The cooling at present commonly used method of bringing down a fever has: cooling patch and ice bag ice compress.
Contain high-molecular gel class cooling material in the cooling patch.Its principle is: the moisture content that gelinite contained evaporates in a large number, can take away the heat of human body, adds materials such as peppermint, borneol simultaneously in gelinite, makes the people produce refrigerant sensation.This series products only need be unpacked in use, is attached to other positions of forehead or health, uses more convenient; Shortcoming is that temperature fall time is shorter, generally only is about 2-3 hours, and only for once using, use cost is higher; In addition,, generally can add chemical cross-linking agent in the course of processing, and children's skin is more tender and lovely, may causes skin discomfort, rubescent when using the cooling patch owing to contain sodium polyacrylate isogel matrix in the cooling patch, in addition irritated.
Ice bag be can reuse, lower-cost a kind of cooling method.The bigger materials of specific heat ratio such as the built-in water of initial ice bag, ethanol, propylene glycol, therefore it is freezing that product needs before use, must could use under the situation of refrigerating apparatus having; In addition, the temperature difference of this series products is bigger, and temperature is low excessively when just bringing into use, and causes the human body sense of discomfort easily, and ice bag freezes under freezing point temperature, becomes lump, and inflexibility is used inconvenient; Also having a gellike class not freeze bag at present, mainly is the freezing point that has reduced water by materials such as interpolation glycerine, by adding the agent of Xylo-Mucine isogel water is lost flowability, softness when this ice bag uses, but can't reach zero pour when shortcoming is freezing, cold storage capacity is low, and duration of service is short.Therefore, ideal ice bag raw material is: low temperature is soft down, and cold storage capacity is big, and duration of service is long, and the cooling temperature is suitable, reusable.
Phase change material by solid-state become liquid state or become solid-state process by liquid state be called phase transition process, at this moment phase change material will absorb or discharge a large amount of latent heat.The characteristic of phase change material temperature approximately constant when phase transformation can reach controlled temperature, reduce the effect of the temperature difference, and whole process material can remain softness.Some have big cold-storage ability, the phase change material of transformation temperature between 10-30 ℃ can satisfy desirable cooling to a great extent and bring down a fever with the requirement of material, bring down a fever than being more suitable for Physical temperature-lowering, when realizing cooling, also avoided the low excessively human body sense of discomfort of bringing of temperature.
At present transformation temperature is arranged is 32 ℃ sal glauberi to the common phase change material in this temperature range, and transformation temperature is 29 ℃ a calcium chloride hexahydrate, and transformation temperature is 26--33 ℃ Sodium acetate trihydrate and urea compound system etc.Wherein sal glauberi is the most common.But single sal glauberi is as phase change material, exists shortcomings such as cold, the deficiency that is separated; And because its transformation temperature is 32 ℃, at the higher weather of some temperature, ice-cold sense is not strong, can not reach the ideal cooling-down effect.
Summary of the invention
The objective of the invention is at above-mentioned the deficiencies in the prior art, a kind of phase change material absorbing and cooling temperature, 12-29 ℃ of transformation temperatures and preparation method thereof that is used for is provided.The transformation temperature of phase change material of the present invention can be regulated between 12-29 ℃, and has advantages such as safety non-toxic, good stability, cold storage capacity be big, has the Physical temperature-lowering effect long period, stable.
Purpose of the present invention is achieved through the following technical solutions:
The cooling phase change material that a kind of transformation temperature is 12-29 ℃, it consists of: weight percent is that 50-95% sal glauberi, weight percent are that 1-25% transformation temperature conditioning agent, weight percent are that 1-10% wetting Agent for Printing Inks, weight percent are that 1-5% nucleator, weight percent are that 1-5% pH value conditioning agent and weight percent are 1-5% thickening material.
Transformation temperature conditioning agent of the present invention is one or more in sodium-chlor, Repone K, ammonium chloride or the ammonium sulfate; Described wetting Agent for Printing Inks is a glycerine; Described nucleator is a borax; Described pH value conditioning agent is a boric acid; Described thickening material is Xylo-Mucine, polyacrylamide or sodium polyacrylate.
The preparation method of phase change material of the present invention may further comprise the steps: with weight percent is that 1-10% wetting Agent for Printing Inks and weight percent are that 1-5% nucleator mixes, adding weight percent and be 1-5% pH value conditioning agent adjusting pH value is 6-8, stir, to wherein adding weight percent is that 1-25% transformation temperature conditioning agent and weight percent are 1-5% thickening material, mixing, add weight percent again and be 50-95% sal glauberi, under 12-29 ℃, be stirred to fusion, stop heating, continue to stir, cooling obtains phase change material.
The transformation temperature of phase change material of the present invention is 12-29 ℃.
The present invention also provides the application of cooling phase change material in absorbing and cooling temperature of 12-29 ℃ of a kind of transformation temperatures.
Compared with prior art, the present invention has following beneficial effect:
(1) adopt the transformation temperature conditioning agent, within the specific limits, along with the increase of temperature regulato, the transformation temperature of phase change material reduces gradually, make transformation temperature can regulate between 12-29 ℃, latent heat of phase change can reach cooling-down effect preferably greater than 100J/g;
(2) use glycerine as wetting Agent for Printing Inks, prevent the loss that moisture content is too fast, make phase change material soft-touch at a lower temperature simultaneously, can be crooked, easy to carry;
(3) use borax as nucleator, solve traditional phase change material supercooled problem, good stability, cold storage capacity are big;
(4) add thickening material, can reduce being separated of phase change material, increase the use properties of phase change material;
(5) safety non-toxic does not add chemical cross-linking agent etc. to the deleterious material of human body skin, reduces the human body sense of discomfort;
(6) has the Physical temperature-lowering effect long period, stable;
(7) easy to use, reusable.
Description of drawings
The temperature curve that the phase change material with different transformation temperatures that Fig. 1 prepares respectively for embodiments of the invention 1 ~ 3 melts under 40 ℃ thermal environment.
Embodiment
Below in conjunction with embodiment the present invention is done further detailed description, but the claimed content of the present invention is not limited thereto.
Embodiment 1
1g glycerine and 1g borax are mixed stirring, adding 1g boron acid for adjusting pH value is 6, stir to wherein adding 0.5g sodium-chlor, 0.5g ammonium chloride and 1g sodium polyacrylate, add the 95g sal glauberi after mixing again, under 29 ℃, be stirred to fusion, stop heating, continue to stir, mixture temperature reduces, and the cotton-shaped solid that obtains after the cooling is phase change material of the present invention.
As seen from Figure 1, the phase change material transformation temperature that embodiment 1 makes is 29 ℃, and latent heat of phase change is 190J/g.
Embodiment 2
3g glycerine and 3g borax are mixed stirring, adding 3g boron acid for adjusting pH value is 7.5, stir to wherein adding 3.5g sodium-chlor, 3.5g Repone K, 3.5g ammonium chloride, 3.5g ammonium sulfate and 2g polyacrylamide, add the 75g sal glauberi after mixing again, under 25 ℃, be stirred to fusion, stop heating, continue to stir, mixture temperature reduces, and the cotton-shaped solid that obtains after the cooling is phase change material of the present invention.
As seen from Figure 1, the phase change material transformation temperature that embodiment 2 makes is 21 ℃, and latent heat of phase change is 165J/g.
Embodiment 3
10g glycerine and 5g borax are mixed stirring, adding 5g boron acid for adjusting pH value is 8, stir to wherein adding 12.5g Repone K, 12.5g ammonium sulfate and 5g Xylo-Mucine, add the 50g sal glauberi after mixing again, under 12 ℃, be stirred to fusion, stop heating, continue to stir, mixture temperature reduces, and the cotton-shaped solid that obtains after the cooling is phase change material of the present invention.
As seen from Figure 1, the phase change material transformation temperature that embodiment 3 makes is 12 ℃, and latent heat of phase change is 140J/g.
Phase change material of the present invention, adopt the transformation temperature conditioning agent, within the specific limits, increase along with temperature regulato, the transformation temperature of material reduces gradually, makes transformation temperature can regulate between 12-29 ℃, when using as the Physical temperature-lowering material, when not having refrigerating apparatus, just leave standstill and to recover by cold water or room temperature.This material softness and using repeatedly reaches the good cooling effect and is unlikely to feel too ice-cold.
Claims (5)
1. the cooling phase change material of 12-29 ℃ of transformation temperatures, it is characterized in that the consisting of of described phase change material: weight percent is that 50-95% sal glauberi, weight percent are that 1-25% transformation temperature conditioning agent, weight percent are that 1-10% wetting Agent for Printing Inks, weight percent are that 1-5% nucleator, weight percent are that 1-5% pH value conditioning agent and weight percent are 1-5% thickening material.
2. phase change material according to claim 1 is characterized in that, described transformation temperature conditioning agent is one or more in sodium-chlor, Repone K, ammonium chloride or the ammonium sulfate; Described wetting Agent for Printing Inks is a glycerine; Described nucleator is a borax; Described pH value conditioning agent is a boric acid; Described thickening material is Xylo-Mucine, polyacrylamide or sodium polyacrylate.
3. the preparation method of the described phase change material of claim 1, it is characterized in that, may further comprise the steps: with weight percent is that 1-10% wetting Agent for Printing Inks and weight percent are that 1-5% nucleator mixes, adding weight percent and be 1-5% pH value conditioning agent adjusting pH value is 6-8, stir, to wherein adding weight percent is that 1-25% transformation temperature conditioning agent and weight percent are 1-5% thickening material, mixing, add weight percent again and be 50-95% sal glauberi, under 12-29 ℃, be stirred to fusion, stop heating, continue to stir, cooling obtains phase change material.
4. according to the described phase change material of one of claim 1 ~ 3, it is characterized in that the transformation temperature of described phase change material is 12-29 ℃.
5. the application of the described phase change material of claim 1 in absorbing and cooling temperature.
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| CN103756645A (en) * | 2014-01-24 | 2014-04-30 | 熊建平 | Cold-chain transportation phase change material and preparation method thereof |
| CN104263321A (en) * | 2014-09-17 | 2015-01-07 | 湖南中烟工业有限责任公司 | Composite phase change material capable of regulating flue gas temperature of cigarette filter as well as preparation method and applications of composite phase change material |
| CN104610922A (en) * | 2014-12-31 | 2015-05-13 | 轻工业自动化研究所 | Phase-change material for cold storage air conditioner and preparation method of phase-change material |
| CN104662120A (en) * | 2012-09-28 | 2015-05-27 | 凸版资讯股份有限公司 | Cooling tool |
| CN105038715A (en) * | 2015-06-23 | 2015-11-11 | 江南大学 | Hydrous salt cold storage agent with phase-transition temperature of 5-8 DEG C and preparation method thereof |
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Application publication date: 20111207 |