Temperature-responsive fiber and method of preparing same

A technology of temperature response and fiber, which is applied in the direction of carbon fiber, fiber type, fiber treatment, etc., can solve the problems of low temperature response material filling, limited temperature response capability, and difficult packaging of the latter, so as to expand the variety and application range , good stability and short process

Inactive Publication Date: 2019-12-24
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Description
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  • Application Information

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Problems solved by technology

[0004] The existing temperature-responsive fiber preparation methods are mainly prepared by mixing temperature-responsive materials with raw materials and then spinning, and by impregnating and filling hollow fibers; the former is affected by the preparation technology, the filling amount of temperature-responsive materials is not high, and the temperature response capability is limited. , the latter is difficult to encapsulate

Method used

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  • Temperature-responsive fiber and method of preparing same
  • Temperature-responsive fiber and method of preparing same
  • Temperature-responsive fiber and method of preparing same

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preparation example Construction

[0034] In some embodiments, the preparation method of the temperature-responsive fiber specifically includes:

[0035] The porous fiber is immersed in the temperature-responsive material solution, then left to stand in a vacuum environment or normal pressure environment, and then taken out and dried, so that the temperature-responsive material is encapsulated in the mesopores of the porous fiber, and then the temperature-responsive fiber is obtained.

[0036] Among them, the choice of solvent in the temperature-responsive material solution depends on the types of porous fibers and temperature-responsive materials. The solvents used in existing experiments are mainly common solvents such as water, ethanol, methanol, tert-butanol, and dimethyl sulfoxide; for low-viscosity In order to ensure the filling efficiency, temperature responsive materials are often filled directly with saturated solution or molten state. For high viscosity temperature responsive materials, glycerin, ethyl...

Embodiment 1

[0065] (1) Prepare cellulose wet fiber by wet spinning process (the wet fiber in the embodiment is the aforementioned solvent-containing fiber, the same below), and adopt supercritical drying technology to dry the cellulose wet fiber to obtain the cellulose porous fiber, The average pore size of cellulose porous fibers is 200nm, the pore size distribution is 15-500nm, and the porosity is 98%;

[0066] (2) Heating paraffin (heat-induced aggregation state change material) to 80°C to obtain liquid paraffin, impregnating the cellulose porous fiber in liquid paraffin, placing it in a vacuum oven, and standing it at 80°C under vacuum for 8 hours to obtain Composite fiber (the composite fiber in implementation is the temperature-responsive fiber formed by combining the former fiber and the temperature-responsive material, the same below);

[0067] (3) Take out the composite fiber, use absorbent paper to absorb excess liquid paraffin on the surface of the composite fiber, place the co...

Embodiment 2

[0069] (1) Prepare polyamic acid wet fiber by wet spinning process, soak polyamic acid wet fiber with acetic anhydride pyridine mixed solution to obtain polyimide wet fiber, and use supercritical drying technology to dry cellulose wet fiber to obtain Porous polyimide fiber, the average pore size of polyimide porous fiber is 30nm, the pore size distribution is 10-90nm, and the porosity is 95%;

[0070] (2) Dissolving PMMA (polymethyl methacrylate) in DMSO (dimethyl sulfoxide) to obtain a PMMA solution, immersing the cellulose porous fiber in the PMMA solution to obtain a composite fiber;

[0071] (3) Take out the composite fiber, use absorbent paper to absorb excess PMMA solution on the surface of the composite fiber, place the composite fiber in an oven at 80°C for shaping and drying, and obtain a temperature-responsive mechanical change fiber. Figure 4 A scanning electron microscope picture of the obtained temperature-responsive fibers is shown.

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Abstract

The invention discloses a temperature-responsive fiber and a method of preparing the same. The method of preparing the temperature-responsive fiber comprises: impregnating a porous fiber with a liquidtemperature-responsive material or a temperature-responsive material solution, thereby encapsulating the temperature-responsive material in mesopores of the porous fiber to obtain the temperature-responsive fiber. According to the method of preparing the temperature-responsive fiber, a complex synthesis technology is not needed, no chemical reaction occurs in the whole preparation process, the process is simple, the flow is short, and large-scale preparation of the temperature-responsive fiber can be achieved; different temperature-responsive fibers can be obtained by adjusting the temperature-responsive material, so that the type and application range of the temperature-responsive fiber is greatly expanded.

Description

technical field [0001] The invention relates to a temperature-responsive fiber, in particular to a temperature-responsive fiber and a preparation method thereof, belonging to the technical field of intelligent materials. Background technique [0002] Temperature-responsive materials refer to a class of materials whose properties change with temperature. Its temperature response mechanism is mainly to change the chemical bond or aggregation state of the temperature-responsive material occupying the "key site" inside the material through temperature change, thereby causing changes in the color, mechanical properties, transparency and other properties of the material. It is often used as a smart "switch" and is used in the fields of sensors, biomedicine, chemistry and biocatalysis. Temperature-responsive materials have received extensive attention and research due to their easy temperature control, wide application scenarios, and large demand. [0003] However, the existing t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/56D06M15/227D06M15/53D06M13/02D06M15/263D06M101/06D06M101/20D06M101/26D06M101/30D06M101/34D06M101/40
CPCD06M11/56D06M13/02D06M15/227D06M15/263D06M15/53D06M2101/06D06M2101/20D06M2101/26D06M2101/30D06M2101/34D06M2101/40
Inventor 张学同刘增伟
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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