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A high-efficiency cage-shaped needle nozzle electrospinning device and its application in the preparation of inorganic material nanofibers

A cage needle, electrospinning technology, used in nanotechnology, nanotechnology, fiber processing, etc. for materials and surface science

Active Publication Date: 2019-03-12
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the studies involving electrospinning use a simple electrospinning device with a needle tube as the nozzle, and only a small amount of nanofiber or nanofiber film samples can be obtained.

Method used

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  • A high-efficiency cage-shaped needle nozzle electrospinning device and its application in the preparation of inorganic material nanofibers
  • A high-efficiency cage-shaped needle nozzle electrospinning device and its application in the preparation of inorganic material nanofibers
  • A high-efficiency cage-shaped needle nozzle electrospinning device and its application in the preparation of inorganic material nanofibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] (1) Add 3.0790g of aluminum sec-butoxide to a mixed solvent containing 3.12mL of n-propanol, 2.08mL of isobutanol, and 1.57mL of acetylacetone, stir and seal for 1 hour to form a light yellow solution; Add absolute ethanol and 0.7g deionized water, then slowly add 1.63mL concentrated nitric acid dropwise, stir for 5-6h to obtain a transparent aluminum sol; add poloxamer surfactant F127 to the aluminum sol, and then add 3- 10 g of a 15 wt % polyvinyl alcohol aqueous solution is stirred at room temperature for 1-2 h until a transparent and uniform spinnable solution is formed. Among them, Al 3+ : EtOH: The molar ratio of poloxamer surfactant F127 is 1:30-50:0008-0.018, and the viscosity of the spinnable solution is controlled at 100-200mPa·S.

[0095] (2) Spinning process: the spinnable solution obtained in (1) is assembled into the device of the present invention for spinning. The number of installed nozzle groups is 4, the distance L1 from the nozzle end to the outer ...

Embodiment 2

[0100] (1) Quickly transfer 3.079g of aluminum sec-butoxide to 32g of absolute ethanol, stir, and then add Ce(NO 3 ) 3 ·6H 2 O 0.1085g, stir to dissolve, then add 0.63mL deionized water and 1.63mL HNO 3 , hydrolyzed for 6-8h; then, add 3g of poloxamer surfactant F127, add 10g of PVA aqueous solution with a mass fraction of 3-15wt%, stir and dissolve to form a transparent spinnable solution; control the viscosity of the spinnable solution at 100 -200mPa·S;

[0101] (2) Assemble the spinnable solution obtained in (1) into the device of the present invention for spinning. The number of installed nozzle groups is 1, the distance L1 from the end of the nozzle to the outer wall of the support body = 25mm (i.e. about the length of the nozzle), the distance from the end of the nozzle to the inner wall of the receiving part 12 = 200mm (i.e. the receiving distance), the nozzles of each nozzle group The number is 6, the longitudinal distance L3=225mm between adjacent nozzle groups, s...

Embodiment 3

[0105] The difference with Example 2 is: in step (1), add 0.2171g Ce (NO 3 ) 3 ·6H 2 O; adopt the same device assembly parameters as in Example 2 to carry out spinning, and step (2) and step (3) are the same as in Example 2.

[0106] The resulting CeO 2 / Al 2 o 3 The diameter of the composite fiber is between 100-500nm, the alumina content is 88wt%, CeO 2 The content is 12wt%; the surface of the nanofiber is composed of several nanometers of alumina particles, and several nanometers of cerium oxide particles are uniformly dispersed in the mesoporous structure of alumina, with an average pore diameter of 6nm and a specific surface area of ​​120m 2 / g.

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Abstract

The invention discloses an efficient cage-shaped needle-type-nozzle electrostatic spinning device which comprises a nozzle set array integration component, a direct-current high-voltage power source, a receiving part and a driving part. An annular multi-nozzle set array is designed, and a nozzle set and the receiving part are arranged respectively in an internally-externally concentric mode; annular designing of the nozzle set effectively weakens repelling between electrified jet flows of adjacent nozzles, and efficiency of each needle in the nozzle set is close to an extreme value of spinning efficiency of a single needle-type nozzle. The invention further discloses application of the device in preparation of inorganic material nanofiber.

Description

technical field [0001] The invention relates to the field of electrospinning. More specifically, it relates to a high-efficiency cage-shaped needle nozzle electrospinning device and its application in the preparation of inorganic material nanofibers. Background technique [0002] Electrospinning (referred to as "electrospinning") is an important method for preparing nanofibers and functional nanofiber films. In the past one or two decades, the preparation and performance research of nanomaterials has become a hot spot in the field of material research. Therefore, people's attention to electrospinning has continued to heat up, and its applications have become increasingly widespread. However, most of the studies involving electrospinning use a simple electrospinning device with a needle tube as the nozzle, and only a small amount of nanofiber or nanofiber film samples can be obtained. When it is necessary to prepare a certain nanofiber or nanofiber membrane material on a la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00C01F7/02B82Y30/00
Inventor 吴大勇王刚梁卫华
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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