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Multi-stage phase change micro-nano complex fiber, and preparation method and application thereof

A composite fiber, micro-nano technology, applied in fiber processing, fiber chemical characteristics, melt spinning, etc., can solve the problems of low content of phase change materials, layered precipitation, liquid leakage, etc.

Inactive Publication Date: 2010-12-29
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are various deficiencies in the practical application of solid-liquid phase change materials: such as the expansion and contraction of the volume during the phase change, the generation and leakage of liquid; the organic thermal conductivity is small, and it is easy to be oxidized in the air; Separation, corrosion, etc.
The fiber diameter obtained in the above preparation method is usually more than ten microns, or the content of phase change material in the fiber is low, and it is difficult to increase
[0006] The Xia (Nano letters, 2006) research group of the University of Washington in the United States reported a coaxial electrospinning method to prepare micron fibers containing phase change materials. High, but only the preparation of fibers containing one phase change material has been reported

Method used

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  • Multi-stage phase change micro-nano complex fiber, and preparation method and application thereof
  • Multi-stage phase change micro-nano complex fiber, and preparation method and application thereof
  • Multi-stage phase change micro-nano complex fiber, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0048] Take 0.3g PVP, 3g Ti(OBu) 4 , 2 mL of acetic acid, and 5 mL of ethanol were mixed as the shell solution, and n-hexadecane and n-octadecane were used as the core solution. Figure 2a The experimental setup (2 fluid channels inside) was used for spinning. The external ambient temperature is 25°C, the relative humidity is 50%, the electrospinning voltage is 25-30KV, the distance between the spinneret and the collecting plate is 30cm, and n-hexadecane and n-octadecane are simultaneously injected into the two inner fluid (nuclear material) channels , the flow rate of the core solution is 1mL / h, the flow rate of the shell solution is 8-10mL / h, and the prepared fibers are collected with a collecting plate.

[0049] The outer diameter of the prepared fibers is 2-5 μm. Differential thermal analysis (DSC) results show that the phase transition melting temperature peaks of this phase change energy storage fiber are 17 °C and 28 °C, reflecting the nature of multi-stage phase tran...

Embodiment 2

[0051] Take 2g PVP, 6g Ti(OiPr) 4 , 2 mL of acetic acid, and 10 mL of ethanol were mixed as the shell layer solution, and n-hexadecane, n-docosane, and n-triacontane were used as the core layer solution. Figure 2a The experimental setup for spinning. The external ambient temperature is 28°C, the relative humidity is 40%, the electrospinning voltage is 20-25KV, the distance between the spinneret and the collecting plate is 20cm, and n-hexadecane and n-20 are respectively injected into the three inner fluid (nuclear material) channels. Dioxane, n-triacontane, the flow rate of the core solution is 1.5mL / h, and the flow rate of the shell solution is 5-8mL / h, and the prepared fibers are collected with a collecting plate.

[0052] The outer diameter of the prepared fibers is 0.5-4 μm. The results of differential thermal analysis show that the phase change fiber has melting phase transition peaks at 17℃, 44℃ and 68℃, indicating that the fiber has the property of multi-stage phase ...

Embodiment 3

[0054] Take 0.1molNiAc 2 ·4H 2 O was dissolved in 1 mol absolute ethanol, then 0.1 mol HNO was added 3 Stir and add 0.1mol Ti(OiPr) after a few hours 4 , stirring for 5 hours. A DMF solution with a concentration of 14 wt% PVAc was added and stirred uniformly. NiTiO 3 The mass ratio of sol to PVAc solution was 0.7:1. The prepared sol is used as the shell layer solution, and deca alcohol, dodecanol, hexadecanol, and eicosanol are used as the core layer solution. Figure 2a The experimental setup for spinning (4 inner fluid channels). The external environment is 25°C, the relative humidity is 70%, the electrospinning voltage is 10-15KV, the distance between the spinneret and the collecting plate is 15cm, and ten alcohol, dodecanol, hexadecanol and Eicosanol, the flow rate of the core solution is 0.7mL / h, and the flow rate of the shell solution is 1-5mL / h, and the prepared fibers are collected with a collecting plate.

[0055]The outer diameter of the prepared fibers is 3-...

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Abstract

The invention pertains to the field of phase change materials, and particularly relates to a multi-stage phase change energy storage micro-nanometer composite fiber, an electro spinning preparation method and the application thereof. The multi-stage phase change energy storage micro-nanometer composite fiber prepared by the electrostatic spinning technology is a multi-channel fibrous core-shell structure which is composed of a fibrous shell, fibrous cores encapsulating phase change materials with different phase change temperature. The phase change materials with different phase change temperature are respectively and independently encapsulated in the channels. The channels of the multi-channel fibrous core are 2 or more than 2, the phase change temperature of the multi-stage phase changeenergy storage micro-nanometer composite fiber is between 0 DEG C and 80 DEG C. The phase change fiber can be used for external environments with different temperature or great-changing temperature. The micro-nanometer structure of the phase change fiber improves heat transfer efficiency of the phase change materials; the composite fiber of multi-stage phase change temperature is obtained by a one-step method; the preparation method is simple, and the maneuverability is good.

Description

technical field [0001] The invention belongs to the field of phase-change materials, and particularly relates to a multi-stage phase-change energy storage micro-nano composite fiber and an electrospinning preparation method thereof, and the use of the multi-stage phase-change energy storage micro-nano composite fiber. Background technique [0002] Since the world energy crisis in the 1970s, the basic and applied research of energy storage technology has risen rapidly in developed countries and has been continuously developed. One of the important technologies for utilization. In the research of energy storage technology, the development of energy storage materials is the most concerned. [0003] Among the energy storage materials, solid-liquid phase change materials have the advantages of high energy storage density, approximately constant temperature in the energy storage process, small volume change, and easy process control, and have been widely valued by scientists from...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F1/10D01D5/34D01D5/08
Inventor 王女曹新宇赵勇孙中伟江雷
Owner INST OF CHEM CHINESE ACAD OF SCI
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