CN108940147A - A kind of polyethylene glycol/Triafol T phase-change microcapsule and preparation method thereof - Google Patents
A kind of polyethylene glycol/Triafol T phase-change microcapsule and preparation method thereof Download PDFInfo
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- CN108940147A CN108940147A CN201810965585.9A CN201810965585A CN108940147A CN 108940147 A CN108940147 A CN 108940147A CN 201810965585 A CN201810965585 A CN 201810965585A CN 108940147 A CN108940147 A CN 108940147A
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- triafol
- polyethylene glycol
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/04—Making microcapsules or microballoons by physical processes, e.g. drying, spraying
- B01J13/043—Drying and spraying
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
- C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
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Abstract
The invention discloses a kind of polyethylene glycol/Triafol T phase-change microcapsules and preparation method thereof.The phase-change microcapsule, core material are polyethylene glycol, and wall material is Triafol T, and diameter is 2~15 μm, heat of transformation 100-160J/g.The preparation method dissolves polyethylene glycol and Triafol T using methylene chloride as solvent, and polyethylene glycol/Triafol T phase-change microcapsule is made by being spray-dried.The present invention using Triafol T as the polyethylene glycol phase-change microcapsule new material of wall material, in use process will not release formaldehyde, and Triafol T is degradable.Relatively other preparation methods are not necessarily to additional emulsifier, and methylene chloride easily recycles using methylene chloride as the spray drying process of solvent, are a kind of environmental-friendly preparation methods.The polyethylene glycol/ethyl cellulose phase-change microcapsule particle size range is 2~15 μm, and heat of transformation 100-160J/g will have a wide range of applications in the preparation of phase-change material.
Description
Technical field
The present invention relates to phase-change microcapsule technical fields, and in particular to a kind of polyethylene glycol/Triafol T phase transformation is micro-
Capsule and preparation method thereof.
Background technique
Polyethylene glycol is as a kind of common phase-change material, because its phase transition temperature variation range is wide, while also have just compared with
The high heat of transformation, therefore receive extensive attention and study.But it deposits in use easily leakage, volume in phase transition process
Variation is big, the disadvantages such as thermal conductivity is low.For disadvantage mentioned above, coat phase-change material to form phase-change microcapsule using filmogen
Microcapsules technology can prevent the leakage of phase-change material with the contact of external environment, control volume change when phase transformation, simultaneously
Also increase heat transfer area.Therefore, phase-change microcapsule has become a kind of composite phase-change material for most developing power at present.
Currently, the most common wall material is high molecular material such as melamine resin, Lauxite etc. can be released in use
It puts formaldehyde or is difficult to degrade, pollute the environment, it is clear that cannot satisfy the use demand.
Summary of the invention
Goal of the invention: the deficiencies in the prior art are directed to, the object of the present invention is to provide a kind of polyethylene glycol/tri- vinegar
Acid cellulose phase-change microcapsule has many advantages, such as degradable, formaldehydeless；It is a further object of the present invention to provide a kind of above-mentioned poly- second
Glycol/Triafol T phase-change microcapsule preparation method.Further object of the present invention be to provide a kind of above-mentioned polyethylene glycol/
The application of Triafol T phase-change microcapsule.
Technical solution: in order to achieve the above-mentioned object of the invention, The technical solution adopted by the invention is as follows:
A kind of polyethylene glycol/Triafol T phase-change microcapsule, core material are polyethylene glycol, and wall material is triacetate fiber
Element, diameter are 2~15 μm, heat of transformation 100-160J/g.
The molecular weight of the polyethylene glycol is 800~8000.
The mass ratio of the Triafol T and polyethylene glycol is 1: 3~1: 5.
A kind of polyethylene glycol/Triafol T phase-change microcapsule preparation method, using methylene chloride as solvent,
Polyethylene glycol and Triafol T are dissolved, polyethylene glycol/Triafol T phase-change microcapsule is made by being spray-dried.
The polyethylene glycol/Triafol T phase-change microcapsule preparation method, comprising the following steps:
1) by Triafol T and polyethylene glycol adding into dichloromethane, stirring and dissolving obtains transparent equal at normal temperature
One solution；
2) solution in step 1) is delivered into spray drying dress by peristaltic pump with the speed of 1.4~4.2mL/min
It sets, after spray-dried, obtains polyethylene glycol/Triafol T phase-change microcapsule.
The mass ratio of the Triafol T and polyethylene glycol is 1: 3~1: 5.
In step 2), be arranged spray drying outlet temperature be 60~100 DEG C, compressed air pressure be 0.14~
0.18MPa, 20~40m of air velocity3/h。
The molecular weight of the polyethylene glycol is 800~8000.
The polyethylene glycol/Triafol T phase-change microcapsule is preparing the application in phase-change material.
The utility model has the advantages that compared with prior art, polyethylene glycol of the present invention/Triafol T phase-change microcapsule and its preparation
The advantages of method has include:
1) using Triafol T as the polyethylene glycol phase-change microcapsule new material of wall material, first will not be discharged in use process
Aldehyde, and Triafol T is degradable.
2) relatively other preparation methods are not necessarily to additional emulsifier, and dichloro using methylene chloride as the spray drying process of solvent
Methane easily recycles, and is a kind of environmental-friendly preparation method.
3) environmentally friendly phase-change microcapsule is prepared using cellulose cladding phase-change material, and realizes cellulose high level
Change the important channel utilized.
4) polyethylene glycol/ethyl cellulose phase-change microcapsule particle size range is 2~15 μm, heat of transformation 100-160J/
G will have a wide range of applications in the preparation of phase-change material.
Detailed description of the invention
Fig. 1 is polyethylene glycol/Triafol T phase-change microcapsule optical microscope of embodiment 1；
Fig. 2 is polyethylene glycol/Triafol T phase-change microcapsule optical microscope of embodiment 2；
Fig. 3 is polyethylene glycol/Triafol T phase-change microcapsule optical microscope of embodiment 3.
Specific embodiment
The present invention is further illustrated combined with specific embodiments below.
Embodiment 1
By mass ratio (mass ratio of Triafol T and polyethylene glycol, similarly hereinafter) Triafol T for being 1: 3 and poly-
Ethylene glycol (molecular weight 8000) adding into dichloromethane, is stirred at room temperature 3h, obtains transparent uniform solution.Setting spray
100 DEG C, compressed air pressure 0.18MPa, air velocity 30m of mist drying device inlet temperature3/ h, with the speed of 1.4mL/min
Solution is conveyed by peristaltic pump and enters spray-drying installation, and polyethylene glycol/Triafol T phase transformation is obtained by spray drying
Microcapsules.
Prepared polyethylene glycol/Triafol T phase-change microcapsule optical microscope is as shown in Figure 1, poly- at this
In ethylene glycol/Triafol T phase-change microcapsule, on the outside, for polyethylene glycol in inside, particle is spherical in shape for Triafol T,
Size is more uniform, and particle size range is 2~10 μm.Use DSC200F1 differential scanning calorimeter measure the heat of transformation of microcapsules for
160J/g。
Embodiment 2
Triafol T and polyethylene glycol (molecular weight 800) adding into dichloromethane by mass ratio for 1: 5,
3h is stirred at room temperature, obtains transparent uniform solution.60 DEG C of spray-drying installation inlet temperature of setting, compressed air pressure
0.14MPa, air velocity 40m3/ h conveys solution by peristaltic pump with the speed of 4.2mL/min and enters spray-drying installation, leads to
It crosses spray drying and obtains polyethylene glycol/Triafol T phase-change microcapsule.
Prepared polyethylene glycol/Triafol T phase-change microcapsule optical microscope is as shown in Fig. 2, poly- at this
In ethylene glycol/Triafol T phase-change microcapsule, on the outside, for polyethylene glycol in inside, particle is spherical in shape for Triafol T,
Size is more uniform, and particle size range is 5~10 μm.Use DSC200F1 differential scanning calorimeter measure the heat of transformation of microcapsules for
100J/g。
Embodiment 3
Triafol T and polyethylene glycol (molecular weight 1000) adding into dichloromethane by mass ratio for 1: 4,
3h is stirred at room temperature, obtains transparent uniform solution.80 DEG C of spray-drying installation inlet temperature of setting, compressed air pressure
0.16MPa, air velocity 20m3/ h conveys solution by peristaltic pump with the speed of 2.8mL/min and enters spray-drying installation, leads to
It crosses spray drying and obtains polyethylene glycol/Triafol T phase-change microcapsule.
Prepared polyethylene glycol/Triafol T phase-change microcapsule optical microscope is as shown in figure 3, poly- at this
In ethylene glycol/Triafol T phase-change microcapsule, on the outside, for polyethylene glycol in inside, particle is spherical in shape for Triafol T,
Size is more uniform, and particle size range is 2~15 μm.The heat of transformation of microcapsules is measured using DSC200 F1 differential scanning calorimeter
For 108J/g.
Claims (9)
1. a kind of polyethylene glycol/Triafol T phase-change microcapsule, which is characterized in that the core material of phase-change microcapsule is poly- second two
Alcohol, wall material are Triafol T, and diameter is 2~15 μm, heat of transformation 100-160J/g.
2. polyethylene glycol according to claim 1/Triafol T phase-change microcapsule, which is characterized in that described is poly-
The molecular weight of ethylene glycol is 800~8000.
3. polyethylene glycol according to claim 1/Triafol T phase-change microcapsule, which is characterized in that described three
The mass ratio of cellulose acetate and polyethylene glycol is 1: 3~1: 5.
4. a kind of polyethylene glycol described in claims 1 or 2 or 3/Triafol T phase-change microcapsule preparation method, special
Sign is, using methylene chloride as solvent, polyethylene glycol and Triafol T are dissolved, and poly- second two is made by spray drying
Alcohol/Triafol T phase-change microcapsule.
5. polyethylene glycol according to claim 5/Triafol T phase-change microcapsule preparation method, feature exist
In, comprising the following steps:
1) by Triafol T and polyethylene glycol adding into dichloromethane, stirring and dissolving obtains transparent uniform at normal temperature
Solution；
2) solution in step 1) is delivered into spray-drying installation by peristaltic pump with the speed of 1.4~4.2mL/min, passed through
After spray drying, polyethylene glycol/Triafol T phase-change microcapsule is obtained.
6. polyethylene glycol according to claim 5/Triafol T phase-change microcapsule preparation method, feature exist
In: the mass ratio of the Triafol T and polyethylene glycol is 1: 3~1: 5.
7. polyethylene glycol according to claim 5/Triafol T phase-change microcapsule preparation method, feature exist
In: in step 2), the outlet temperature that spray drying is arranged is 60~100 DEG C, and compressed air pressure is 0.14~0.18MPa, empty
20~40m of gas velocity3/h。
8. polyethylene glycol according to claim 5/Triafol T phase-change microcapsule preparation method, feature exist
In: the molecular weight of the polyethylene glycol is 800~8000.
9. polyethylene glycol described in claims 1 or 2 or 3/Triafol T phase-change microcapsule is in preparing phase-change material
Using.
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| CN201810965585.9A CN108940147B (en) | 2018-08-22 | 2018-08-22 | Polyethylene glycol/cellulose triacetate phase change microcapsule and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112538337A (en) * | 2020-12-16 | 2021-03-23 | 陕西科技大学 | Graphene oxide modified cellulose-based phase change microcapsule and preparation method thereof |
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