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

Method for preparing cellulosic fibers from straws

A cellulose fiber and cellulose technology, which is applied in the field of cellulose fiber preparation from straw, can solve the problems of cellulose destruction and unfavorable spinning, and achieve the effect of avoiding damage

Inactive Publication Date: 2017-06-13
杨太松
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the cellulose used to manufacture cellulose fibers uses mechanical methods to crush the straw and then use acid hydrolysis or enzymatic hydrolysis. This method will mechanically destroy the cellulose, which is not conducive to subsequent spinning.

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
  • Method for preparing cellulosic fibers from straws

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: a method for preparing cellulose fibers from straws, comprising the steps of:

[0037] 1) Cut the straw into 1-2 mm wide straw strips with a rolling cutter;

[0038] 2) Put the strips of straw in step 1) into a pool and soak them in hydrogen peroxide for bleaching, and at the same time make the strips of straw fully absorb water to become wet straws;

[0039] 3) Freeze the wet straw in step 2) with an ultra-low temperature freezer, then put it into an ultrasonic oscillator and vibrate and pulverize it into straw powder, sieve the straw powder, and sieve out the straw that is not fully broken and repeat freezing, shaking, and sieving;

[0040] 4) Put the straw powder obtained in step 3) into the reaction kettle, soak in warm water at 40°C for 2 hours according to the mass ratio of solid-to-liquid ratio of 1:3, then extract the water and re-inject it into hot water at 60°C for 30 minutes;

[0041] 5) Add acetic acid to the reaction kettle in step 4) to adju...

Embodiment 2

[0049] Embodiment 2: a method for preparing cellulose fibers from straws, comprising the steps of:

[0050] 1) Cut the straw into 1-2 mm wide straw strips with a rolling cutter;

[0051] 2) Put the strips of straw in step 1) into a pool and soak them in hydrogen peroxide for bleaching, and at the same time make the strips of straw fully absorb water to become wet straws;

[0052] 3) Freeze the wet straw in step 2) with an ultra-low temperature freezer, then put it into an ultrasonic oscillator and vibrate and pulverize it into straw powder, sieve the straw powder, and sieve out the straw that is not fully broken and repeat freezing, shaking, and sieving;

[0053] 4) Put the straw powder obtained in step 3) into the reactor, soak in warm water at 50°C for 1.5 hours according to the solid-to-liquid ratio of 1:4, then extract the water and re-inject it into hot water at 65°C for 20 minutes;

[0054]5) Add acetic acid to the reaction kettle in step 4) to adjust the pH value betwe...

Embodiment 3

[0062] Embodiment three: a method for preparing cellulose fiber from straw, comprising the following steps:

[0063] 1) Cut the straw into 1-2 mm wide straw strips with a rolling cutter;

[0064] 2) Put the strips of straw in step 1) into a pool and soak them in hydrogen peroxide for bleaching, and at the same time make the strips of straw fully absorb water to become wet straws;

[0065] 3) Freeze the wet straw in step 2) with an ultra-low temperature freezer, then put it into an ultrasonic oscillator and vibrate and pulverize it into straw powder, sieve the straw powder, and sieve out the straw that is not fully broken and repeat freezing, shaking, and sieving;

[0066] 4) Put the straw powder obtained in step 3) into the reaction kettle, soak in warm water at 60°C for 1 hour according to the solid-to-liquid ratio of 1:5, then extract the water and re-inject it into hot water at 70°C for 15 minutes;

[0067] 5) Add acetic acid to the reaction kettle in step 4) to adjust the...

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
Login to View More

Abstract

The invention relates to a method for preparing cellulosic fibers from straws. The method comprises the following steps: slitting straws into strips by using a slitting mill, soaking and bleaching with hydrogen peroxide, refrigerating with an ultralow temperature refrigerating machine, oscillating in an ultrasonic oscillator and grinding into powder; adding the powder into a reactor, soaking with warm water for 1-2 hours according to a solid-to-liquid mass ratio of 1:3 to 1:5, adding bio-enzymes for performing enzymolysis for 1-3 hours, dewatering the bleached precipitate with a press master, drying by using a roller dryer so as to obtain dried cellulose powder; and mixing the cellulose powder with hot water so as to obtain a cellulose stock solution, and adding the cellulose stock solution to an electrostatic spinning machine for spinning the cellulosic fibers. The method disclosed by the invention has the beneficial effects that the strip-shaped straws are refrigerated by adopting the ultralow temperature refrigerating machine and oscillated and ground by utilizing the ultrasonic oscillator, and the cellulose structure can be prevented from being damaged, so that the cellulosic fibers are difficult to break in the spinning process; and with the adoption of the bio-enzymes prepared by mixing multiple enzymes, xylogen in the straws can be completely degraded.

Description

technical field [0001] The invention relates to the field of regenerated cellulose fibers, in particular to a method for preparing cellulose fibers from straw. Background technique [0002] Regenerated cellulose fiber uses natural cellulose as raw material, does not change its chemical structure, only changes the physical structure of natural cellulose, so as to produce regenerated cellulose fiber with better performance. Its structure is similar to cotton, the difference is that its hygroscopicity and air permeability are better than cotton fibers, it can be said that it is the best hygroscopicity and air permeability of all chemical fibers, known as "breathing fabric" . At the same time, it also has some advantages of silk that cotton fiber does not have. Therefore, it is more comfortable to wear; the beauty of dyeing is better than that of cotton fiber; the hand feels soft, plump and smooth, with excellent drape and silk-like luster; high thermal stability and light sta...

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 Applications(China)
IPC IPC(8): D21C5/00B27J1/00D01C1/00D01D5/00D01F2/00
CPCB27J1/00D01C1/00D01D5/0015D01F2/00D21C5/005
Inventor 杨太松
Owner 杨太松