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Core/shell fiber with nanowire-embedded microtube structure and preparation method thereof

A technology of microtubes and nanowires, which is applied in the field of core/shell fibers with microtube-in-nanowire structure and its preparation, can solve unfeasible problems, achieve the effects of improving material performance, expanding the selection range, and simplifying the process

Inactive Publication Date: 2011-11-09
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this method is not feasible for two spinning solutions with strong interaction, such as mutual reaction or precipitation solution.
This restriction on the choice of spinning solution makes the method subject to certain limitations in application.

Method used

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  • Core/shell fiber with nanowire-embedded microtube structure and preparation method thereof
  • Core/shell fiber with nanowire-embedded microtube structure and preparation method thereof
  • Core/shell fiber with nanowire-embedded microtube structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The three-fluid coaxial electrospinning device utilized in this embodiment is as figure 1 As shown, it includes a composite spinneret assembled coaxially by three stainless steel outer nozzles 1, middle nozzles 2, and inner nozzles 3 of different thicknesses, a DC high-voltage power supply 4, a ground wire 5, a collecting plate 6, and A liquid supply system composed of a liquid storage tank 7, an infusion pipeline 8, and a liquid supply pump 9; between the outer nozzle 1 and the inner nozzle 3 is the middle nozzle 2, the outer nozzle 1 The inner diameter of the nozzle is 2.0-3.0mm, the inner diameter of the middle nozzle 2 is 1.0-2.0mm, and the inner diameter of the inner nozzle 3 is 0.15-1.0mm; the outer nozzle 1, the middle nozzle 2, and the inner nozzle 3 pass through their respective The infusion pipelines 8 are connected to the outlets of the respective liquid supply pumps 9, and the feed ports of the respective liquid supply pumps 9 are connected to the respective...

Embodiment 2

[0050] Adopt the device as embodiment 1, join 2.0g PVP in the mixed solution of 10g ethanol and 2g glacial acetic acid, add 6.0g Ti(OBu) again after stirring and dissolving 4 , and continued to stir for 4 hours to form a homogeneous sol. The sol is used as an external fluid through the liquid supply system at a rate of 5.0-8.0mL·h -1 The velocity is delivered to the outer nozzle.

[0051] Add 2.0g of PVP to the mixture of 10g of ethanol and 2g of glacial acetic acid, stir and dissolve, then add 3.0g of Ti(OBu) 4 And 3.0g triisopropoxyvanadium oxide [VO(OiPr) 3 ], continue stirring for 5 hours to form a uniform sol. The sol is used as the internal fluid through the liquid supply system at a rate of 0.1-1.0mL·h -1 The speed is delivered to the inner nozzle.

[0052] Add 1.0 g of lecithin to 8.5 g of liquid paraffin oil, stir to dissolve, then add 0.5 g of deionized water drop by drop, stir magnetically for 5 hours to form a water-in-oil emulsion, and the stirring speed is 2...

Embodiment 3

[0056] Adopt the device as embodiment 1, join 2.0g PVP in the mixed solution of 9g ethanol and 2g glacial acetic acid, add 7.0g tetra-n-butyl zirconate [Zr(OBu) after stirring and dissolving 4 ], continue stirring for 5 hours to form a uniform sol. The sol is used as the external fluid through the liquid supply system at a rate of 5.0-8.0mL·h -1 The velocity is delivered to the outer nozzle.

[0057] Add 1.8g of PVP to the mixed solution of 12.2g of ethanol and 2g of glacial acetic acid, stir and dissolve, then add 4.0g of germanium isopropoxide [Ge(OiPr) 4 ], continue stirring for 5 hours to form a uniform sol. The sol is used as the internal fluid through the liquid supply system at a rate of 0.1-1.0mL·h -1 The speed is delivered to the inner nozzle.

[0058] Add 0.5 g of lecithin to 9.4 g of peanut oil, stir to dissolve, add 0.1 g of deionized water drop by drop, and magnetically stir for 2 hours to form a water-in-oil emulsion at a stirring speed of 2000 r / min. The em...

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Abstract

The invention belongs to a material with a micro / nano composite structure, and particularly relates to a core / shell fiber with a nanowire-embedded microtube structure and a preparation method thereof. The core / shell fiber is characterized in that independent nanowires are embedded in a microtube with a micron-level hollow tubular structure; and the microtube material and the nanowire material arethe same or different polymer materials or inorganic oxide materials. The preparation method provided by the invention is a three-fluid coaxial electrostatic spinning method, wherein three stainless steel spray tubes with different thicknesses are coaxially assembled into a spinneret, and corresponding liquid is respectively introduced into each spray tube through a liquid supply system to carry out composite electrospinning, thus forming a fiber with a three-layer core / shell structure; and moreover, the middle-layer material is removed to leave the hollow tubular structure, thus obtaining the core / shell fiber with a nanowire-embedded microtube structure. The three-fluid composite electrostatic spinning method provided by the invention is more suitable for the preparation of the core / shell fiber.

Description

technical field [0001] The invention belongs to materials with micron and nanocomposite structures, in particular to a core / shell fiber with a micron-tube-in-nanowire structure and a preparation method thereof. Background technique [0002] As special one-dimensional micro- or nano-materials, micro- or nano-fibers with core / shell structure have important application prospects in the fields of drug delivery, catalysis, reinforcement materials, optoelectronic devices, energy materials and other fields due to their unique properties. widespread attention of the people. Many methods have been developed to prepare micro- or nanofibers with core / shell structure, such as chemical vapor deposition (CVD), template method, hydrothermal method, laser ablation method, coaxial electrospinning method and so on. Among the above methods, the coaxial electrospinning method has great advantages in terms of the simplicity of the method, the length and continuity of the fibers, and the like. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D5/28D01D5/24D01D5/098
Inventor 陈洪燕王女邸建城赵勇江雷
Owner INST OF CHEM CHINESE ACAD OF SCI
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