Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of spinning process of preparing st-g-pan fiber by wet method

A technology of wet spinning and spinning process, which is applied in the field of natural polymer modified materials, which can solve the problems of little use value, poor fiber performance, poor miscibility, etc., and achieve excellent water absorption and large specific surface area , the effect of small pores

Active Publication Date: 2021-09-28
DALIAN POLYTECHNIC UNIVERSITY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 1. Due to the thermodynamic incompatibility of St and PAN, although DMSO and DMAc are selected as composite solvents, a certain amount of St can be blended with PAN to prepare St / PAN blended spinning solution, but with the increase of St content, the difference between the two Miscibility between the poor;
[0010] 2. Due to the thermodynamic incompatibility of St and PAN, the mixed solution is prone to interface phase separation during solidification and forming, resulting in the generation of interface micropores, which makes the prepared fiber performance poor;
[0011] 3. The strength of the fiber prepared by this technology is too low, and the use value is not great

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of spinning process of preparing st-g-pan fiber by wet method
  • A kind of spinning process of preparing st-g-pan fiber by wet method
  • A kind of spinning process of preparing st-g-pan fiber by wet method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of method that wet spinning prepares St-g-PAN fiber, comprises the steps:

[0035] (1) Synthesis of starch-grafted acrylonitrile polymer: First weigh 3.2g of starch and add it to a three-necked flask, then add 160mL of distilled water, stir in an oil bath at 80°C for 1 hour until the starch is completely gelatinized, then take it out and let it cool to room temperature. Nitrogen was passed into the starch gelatinization solution for 20 minutes, then 1.69g CAN (ammonium cerium nitrate), 40mL water, and 2.16mL concentrated nitric acid were taken, mixed in a beaker, dissolved under magnetic stirring, and then added to three flask, in N 2 Under protection, the reaction was continuously stirred in an oil bath at 30°C. After the color of the solution changed from orange to milky white, 14.4mL AN (acrylonitrile) was added, and the stirring was continued for 2 hours. A white precipitated polymer appeared, and the reaction was terminated. Naturally cooled to room tempera...

Embodiment 2

[0039] A kind of method that wet spinning prepares St-g-PAN fiber, its step (1) and step (2) are identical with embodiment 1, and step (3) is specifically as follows:

[0040] (3) Preparation of fiber by wet spinning: get 20mL of spinning solution in the syringe, install the propeller, install the syringe in the propeller, and use the 70% DMSO aqueous solution as the coagulation bath with the prepared concentration. Pour the solution into the coagulation bath, start the wet spinning machine, set the heating temperature of the coagulation bath to 40°C, set the speed of the propeller to 25mL / h, the speed of the drafting roller to 1.5rpm, and the speed of the hot roller motor to 1.5rpm. The roll winding speed was 6 rpm and the hot box temperature was 30°C. After setting the parameters, start the propeller to start spinning, and the St-g-PAN fiber can be obtained.

Embodiment 3

[0042] A kind of method that wet spinning prepares St-g-PAN fiber, its step (1) and step (2) are identical with embodiment 1, and step (3) is specifically as follows:

[0043] (3) Preparation of fiber by wet spinning: get 20mL of spinning solution in the syringe, install the propeller, install the syringe in the propeller, and use the 70% DMSO aqueous solution as the coagulation bath with the prepared concentration. Pour the solution into the coagulation bath, start the wet spinning machine, set the heating temperature of the coagulation bath to 46°C, set the speed of the propeller to 25mL / h, the speed of the drafting roller to 1.5rpm, and the speed of the hot roller motor to 1.5rpm. The roll winding speed was 6 rpm and the hot box temperature was 30°C. After setting the parameters, start the propeller to start spinning, and the St-g-PAN fiber can be obtained.

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

No PUM Login to View More

Abstract

The invention discloses a spinning process for wet preparation of St-g-PAN fibers, which belongs to the field of natural polymer modified materials. The present invention uses starch and acrylonitrile to prepare polymers, and then uses wet spinning technology to make fibers, which can not only maintain the good biocompatibility of starch itself, but also have large specific surface area, small pores, high porosity, and oxidation resistance. , corrosion resistance, biodegradability and good biocompatibility.

Description

technical field [0001] The invention relates to a spinning process for preparing St-g-PAN fibers by wet spinning, and belongs to the field of natural polymer modified materials. Background technique [0002] In recent years, with the rapid development of the economy, the increasingly prominent ecological and environmental problems, and the serious shortage of energy sources such as petroleum, the research on biodegradable materials has received more and more attention, and more and more environmentally friendly polymers are used. In partial replacement of synthetic polymers. [0003] Starch is a natural polymer compound, which is divided into amylose and amylopectin. It is cheap, easy to obtain, non-toxic and easy to degrade. my country is rich in starch resources, and its output ranks second in the world. Starch has good hydrophilic properties, but its insolubility in water, poor thermal stability, and difficulty in direct spinning limit its wide application. If the star...

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 & Authority Patents(China)
IPC IPC(8): D01F6/96C08F251/00C08F220/44D01D5/06D01D1/02D01D5/16D01D10/02
CPCC08F251/00D01D1/02D01D5/06D01D5/16D01D10/02D01F6/96C08F220/44
Inventor 宫玉梅王芳军孙兆美刘元法赵秒郭静
Owner DALIAN POLYTECHNIC UNIVERSITY