Preparation method of porous diacetate fiber tow produced by ultraviolet assisted dry spinning

A technology of diacetate fiber and cellulose diacetate, which is applied in the field of preparing porous diacetate fiber tow by ultraviolet light-assisted dry spinning, can solve the problems of unfavorable production and preparation, low volatility, etc., and achieve low production cost and increased production cost. The effect of large specific surface area and ease of mass production

Active Publication Date: 2018-07-31
NANTONG CELLULOSE FIBERS CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The commonly used solvent for preparing porous diacetate fiber is acetone and dichloromethane composite solvent, but dichloromethane is toxic, and the volatility of conventional non-toxic organic reagents is too low, which is not conducive to production and preparation.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 4.45g of cellulose diacetate, dissolve it in a mixed solution of 20mL methyl acrylate and acetone, the volume ratio of methyl acrylate and acetone is 6:4, stir at room temperature until the cellulose diacetate is completely dissolved, and the cellulose diacetate The mass concentration of element is 20wt%. After the spinneret is extruded at a speed of 3mL / min, it is drawn by a drawing device, irradiated by a 400w ultraviolet evaporator, and the solvent is volatilized to obtain a porous diacetate fiber tow with a diameter of 240nm and a specific surface area of 10 m2 / g.

Embodiment 2

[0020] Weigh 7.05g of cellulose diacetate, dissolve it in a mixed solution of 20mL methyl acrylate and acetone, the volume ratio of methyl acrylate and acetone is 7:3, stir at room temperature until the cellulose diacetate is completely dissolved, and the cellulose diacetate The mass concentration of element is 28wt%. After the spinneret is extruded at a speed of 5mL / min, it is drawn by a drawing device, irradiated by a 600w ultraviolet evaporator, and the solvent is volatilized to obtain a porous diacetate fiber tow with a diameter of 300nm and a specific surface area of 12 m² / g.

Embodiment 3

[0022] Weigh 5.8g of cellulose diacetate, dissolve it in a mixed solution of 20mL methyl acrylate and acetone, the volume ratio of methyl acrylate and acetone is 8:2, stir at room temperature until the cellulose diacetate is completely dissolved, and the cellulose diacetate The mass concentration of element is 24wt%. Extrude the spinneret at a speed of 2mL / min, irradiate it with a UV evaporator with a power of 600w, draw it through a drawing device, and volatilize the solvent to obtain a porous diacetate tow with a diameter of 260nm and a specific surface area of ​​8 square meters m / g.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing a porous diacetate cellulose tow by using ultraviolet light-aided dry spinning. The method comprises the following steps: dissolving diacetate cellulose in a spinning solvent, and carrying out filament jet and drawing under ultraviolet light to volatilize the solvent to finally obtain the porous diacetate cellulose tow. According to the method disclosed by the invention, the specific surface area of the porous diacetate cellulose tow is increased remarkably. The method is low in production cost, simple in production process, easy for realizing large-scale production, and capable of decreasing the production processes, such as use, recovery and posttreatment of toxic reagents.

Description

technical field [0001] The invention relates to a method for preparing porous diacetate fiber tow, in particular to a method for preparing porous diacetate fiber tow by ultraviolet light-assisted dry spinning. Background technique [0002] Acetate fiber is the second largest variety of regenerated cellulose fiber after viscose fiber, and is the earliest commercial production of cellulose organic acid ester among cellulose derivatives and is constantly developing. Due to the unique properties of cellulose diacetate, it is widely used in filter materials (such as cigarette filters), local and transdermal drug delivery, biosensors, biomedical separation, biomedical nanocomposites, etc. However, the rapid and efficient preparation of cellulose diacetate with a higher specific surface area will further promote its application in various fields. Porous materials are also one of the hotspots of current research. Porous materials form unevenness on the surface or inside of fibers, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): D01F2/30D01D5/04
CPCD01D5/04D01F2/30
Inventor陈昀张金宁王清清徐阳黄锋林魏取福沈晶晶曹智祥曹建华
OwnerNANTONG CELLULOSE FIBERS CO LTD