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Micro-nanofiber material with linear groove characteristics and orderly forming method thereof

A technology of micro-nano fiber and forming method, which is applied in the direction of filament/thread forming, fiber treatment, textile and paper making, etc. It can solve the problems of swelling and irregular interface not conforming to the expected design, etc., so as to increase the specific surface area and improve the liquid The effect of fast transmission characteristics and short process flow

Active Publication Date: 2020-05-01
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the prepared ones are monofilaments, and because the melt or solution will expand when solidified into fibers, the special-shaped interface does not meet the expected design

Method used

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  • Micro-nanofiber material with linear groove characteristics and orderly forming method thereof
  • Micro-nanofiber material with linear groove characteristics and orderly forming method thereof
  • Micro-nanofiber material with linear groove characteristics and orderly forming method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Polypropylene (melting point 167 ℃, isotactic index 97.6%, ash 0.012%) and polyester (melting point 110±8 ℃, intrinsic viscosity 0.568 dL / g, carboxyl-terminal content 19 mol / t;) as raw materials. Firstly, the polyester chips are dried, the preferred drying temperature in this example is 60°C, and the drying time is 8 hours; secondly, the polypropylene and polyester chips are blended according to the mass fraction of 50% / 50% to obtain its Blended polymer chips; after that, the blended polymer chips are fed into the screw extruder to soften and melt into polypropylene / polyester blended melt.

[0047] The diameter of the screw extruder used in this example is 20mm, and the length-to-diameter ratio is 1:28; the heating in the 5 zones is respectively set as: the temperature in the first zone is 170°C, the temperature in the second zone is 190°C, the temperature in the third zone is 210°C, and the temperature in the fourth zone 220°C and zone 5 temperature 220°C.

[0048] Th...

Embodiment 2

[0052] The difference between embodiment 2 and embodiment 1 is that the etching time is 0 ~ 50min, and the fiber surface morphology of the obtained sample is as follows: figure 2 shown.

Embodiment 3

[0054] The difference between embodiment 3 and embodiment 1 is that the concentration of the etching solution selected is 5-25%, and the fiber surface morphology of the obtained sample is as follows: image 3 shown.

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Abstract

The invention provides a micro-nanofiber material with linear groove characteristics and an orderly forming method thereof. The micro-nanofiber material is characterized by being composed of two non-compatible thermoplastic high-molecular polymers, wherein the fiber diameter is distributed between 0.1 and 30 [mu]m, and the surface of the fiber is provided with an ordered linear groove feature shape with the dimension of 1-200 nm and the arithmetic average roughness of the fiber surface between 0.1 and 0.98; the orderly forming method comprises the steps of two-component melt blending, high-speed hot gas flow drafting and net forming, ordered etching and the like, and has the advantages of short process flow and high structural characteristic (fiber diameter distribution and linear grooves)controllability; and the micro-nanofiber material with the linear groove characteristics not only has a large specific surface area fiber diameter distribution, but also has a linear groove-shaped special-shaped fiber surface rough morphology, and has great application potential in the fields of liquid rapid transmission, efficient low-resistance gas-solid separation, oil-water separation and thelike.

Description

technical field [0001] The invention relates to the field of nonwoven materials, in particular to a micro-nano fiber material with linear groove characteristics and an orderly forming method thereof. Background technique [0002] As a fiber aggregate with engineering structural integrity made by physical and / or chemical methods, nonwoven materials are fiber materials between the four flexible materials of traditional textiles, plastics, leather and paper. It not only has a wide source of raw materials, diverse processing characteristics of net forming methods, net fixing methods and finishing methods, but also has a variety of geometric engineering structures, which are used in many fields such as energy and environment, medical treatment and sanitation, filtration and separation, geotechnical engineering and construction. It has a wide range of applications in important areas related to the national economy and people's livelihood. In the past three decades, nonwoven mater...

Claims

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Application Information

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IPC IPC(8): D01D5/247
CPCD01D5/247
Inventor 甄琪张恒李霞崔景强孙焕惟宋卫民李苼殷高祥钱晓明戴照新张一风李艳艳章伟柳洋
Owner ZHONGYUAN ENGINEERING COLLEGE
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