Detachable adjustable long shuttle type nozzle for solution jet spinning and application method thereof

A long-shuttle, liquid-jet technology, which is applied in dry spinning, spinneret assemblies, textiles and papermaking, etc., can solve the problem of weakening fiber stretching and refining drafting force, affecting fiber preparation, and is not conducive to improving fiber draft. Problems such as stretching and spinning process parameters, to achieve the effect of improving efficiency, convenient installation and debugging, and convenient loading and unloading

Active Publication Date: 2015-04-22
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These existing literature studies have shown that the airflow field in liquid jet spinning is closely related to the protruding distance of the needle and the shape of the nozzle, but the reported solution spinning nozzles are mainly ring nozzles, disc nozzles, etc., and fixed nozzles are generally used. Nozzle structural parameters are not easy to adjust
It is not conducive to improving the airflow field of fiber drafting and related spinning process parameters, weakening the drafting force suffered by fiber drawing and refining, and ultimately affecting the preparation of fibers

Method used

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  • Detachable adjustable long shuttle type nozzle for solution jet spinning and application method thereof
  • Detachable adjustable long shuttle type nozzle for solution jet spinning and application method thereof
  • Detachable adjustable long shuttle type nozzle for solution jet spinning and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve 8 g of polyethylene oxide (PEO, molecular weight 500,000) in 92 mL of deionized water, stir in a water bath at room temperature to prepare a transparent polymer spinning solution with a mass concentration of 8% without precipitation, and put it into a micro-syringe 2, insert the needle 11 into the rubber plug 7, squeeze the polymer spinning liquid into the needle 11 through the micro-injector 2, turn on the air compressor 1, set the angle between the air inlet branch pipe A6 and the air inlet branch pipe B8 to be 45°, and the needle head 11 The radius is 0.8cm, and the outlet area of ​​the detachable nozzle is 3.14cm 2 , adjust the airflow valve from 3 to 1.3 Mpa, and the distance from the needle 11 to the outlet is 0.4 cm, and the micro-nano fibers are obtained, and the fiber diameters are distributed between 800 nm and 3000 nm, see Figure 4 .

Embodiment 2

[0034] Dissolve 15g of polyacrylonitrile (PAN, molecular weight 70,000) in 85g of dimethylacetamide, stir in a 60-degree water bath to prepare a transparent polymer spinning solution with a mass concentration of 15% without precipitation, and put it into In the micro-syringe 2, insert the needle 11 into the rubber stopper 7, squeeze the polymer spinning liquid into the needle 11 through the micro-syringe 2, turn on the air compressor 1, and set the angle between the air inlet branch pipe A6 and the air inlet branch pipe B8 to be 15° , the radius of the needle 11 is 0.6 cm, and the outlet area of ​​the adjustable detachable nozzle is 3.0 cm 2 , adjust the airflow valve 3 to 1.2-1.4 Mpa, and the distance from the needle protruding outlet is 0.5cm, and PAN micro-nano fibers are prepared, and the fiber diameter is distributed between 400nm and 1200nm, see Figure 5 .

Embodiment 3

[0036] Polylactic acid (PLLA, with a relative molecular mass of 1.0×10 5 ) 19.7g was dissolved in 200mL deionized water, stirred in normal temperature water to prepare a polymer spinning solution with a mass concentration of 9% transparent and no precipitation, and put it into the micro-syringe 2, insert the needle 11 into the rubber plug 7 , squeeze the polymer spinning solution into the needle 11 through the micro-syringe 2, turn on the air compressor 1, set the angle between the air inlet branch pipe A6 and the air inlet branch pipe B8 to be 30°, and the radius of the needle head to be 0.6cm, and adjust the outlet area of ​​the detachable nozzle 3.14 cm 2 , adjust the airflow valve from 3 to 1.5 Mpa, and the distance from the outlet where the needle 11 protrudes is 0.6 cm, and the PLLA micro-nano fibers are prepared, and the fiber diameters are distributed between 300 nm and 1500 nm.

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Abstract

The invention discloses a detachable adjustable long shuttle type nozzle for solution jet spinning. The nozzle comprises an airflow inlet branch pipe A, an airflow inlet branch pipe B, a rubber plugging sleeve, a needle head, a long shuttle type airflow pipeline and a nozzle outlet adjusting device; the airflow inlet branch pipe A and the airflow inlet branch pipe B are communicated with the long shuttle type airflow pipeline with a certain angle; the rubber plugging sleeve is fixed between the airflow inlet branch pipe A and the airflow inlet branch pipe B and can adjust the distance of the needle head extending out of the outlet; the long shuttle type airflow pipeline can be retracted in a certain length-diameter ratio; the nozzle outlet adjusting device can adjust the section area o the outlet. Compared with other solution jet nozzles, the nozzle has the advantages that the mounting and the dismounting are convenient, the change of an airflow field in the jet solution spinning can be effectively adjusted, related technical parameters in the jet solution spinning can be effectively adjusted, the stretching airflow field in which fibers are positioned can be improved, and therefore, micro-nanofibers can be obtained conveniently.

Description

technical field [0001] The invention relates to the technical field of micro-nano spinning, in particular to a solution jet spinning die head of micro-nano fibers. Background technique [0002] Submicron to nanometer ultrafine fibers have the characteristics of small size, high specific surface area, small fiber membrane pore size, and high porosity. The materials made of them can be widely used in medical materials, fine filter materials, oil-absorbing materials, thermal insulation materials, Various fields such as battery separators and air purification. Because materials made of micro-nano fibers have good and broad application prospects, their preparation technology has become a research hotspot at home and abroad. [0003] At present, most micro-nanofibers are prepared by techniques such as electrospinning and melt-blown spinning. As early as 1934, the U.S. invention patent (US1975504) pointed out that spinning by electric field force is carried out under the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D4/02D01D5/04D01D13/00
CPCD01D4/02D01D4/025D01D5/04D01D13/00D01D13/02
Inventor 韩万里邢聪骢顾建王茹飘杨利宏
Owner JIAXING UNIV
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