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

A kind of preparation method of cellulose fiber-based activated carbon fiber with high adsorption capacity and its product and application

A technology based on cellulose fiber and activated carbon, which is applied in the field of carbon fiber, can solve the problems of cumbersome preparation process, high cost, and inability to realize the pore-forming effect of fibers, and achieve the effect of rich pore structure and good adsorption performance

Active Publication Date: 2016-06-29
TIANJIN UNIVERSITY OF TECHNOLOGY
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Using natural plant fibers as raw materials, the fiber surface is relatively smooth and the natural pore size is small. Therefore, during the mixing process of raw materials or carbon materials and chemical activators, the contact surface is often limited to the fiber surface, and the pore-forming effect inside the fiber cannot be achieved. In addition, the mixing process of raw materials or carbon materials and chemical activators often adopts the soaking method, so it needs to be completely dried before activation, which makes the preparation process cumbersome and increases the cost

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

[0036] (1) Wash and dry the raw reeds and cut them into scraps, and soak the scraps in lye for 4 hours at normal temperature;

[0037] (2) Place the impregnated crushed material in lye, cook for 2 hours to obtain a cellulose solution, then filter out the cellulose cooked in lye, wash and degumming, squeeze and dehydrate to obtain cellulose;

[0038] (3) impregnating the cellulose obtained in (2) in NaCO 3 in aqueous solution, and then extruded for dehydration;

[0039] (4) Washing the cellulose obtained in (3) with dilute acid, then extruding and dehydrating;

[0040] (5) Repeat steps (3) and (4) to carry out two sodium carbonate aqueous solution immersions and two dilute acid washings and extrusion dehydration, and shake the obtained cellulose after drying for subsequent use;

[0041] (6) Place the cellulose obtained in (5) in NMMO, and heat to 95° C. under vacuum until the cellulose is completely dissolved;

[0042](7) Inject the cellulose / NMMO solution obtained in (6) in...

Embodiment 2

[0048] (1) Wash and dry the raw reeds and cut them into scraps, and soak the scraps in lye for 24 hours at normal temperature;

[0049] (2) Place the impregnated crushed material in lye, cook for 3 hours to obtain a cellulose solution, then filter out the cellulose cooked in lye, wash and degumming, extrude and dehydrate to obtain cellulose;

[0050] (3) impregnating the cellulose obtained in (2) in NaCO 3 in aqueous solution, and then extruded for dehydration;

[0051] (4) Washing the cellulose obtained in (3) with dilute acid, then extruding and dehydrating;

[0052] (5) Repeat steps (3) and (4) to carry out two sodium carbonate aqueous solution immersions and two dilute acid washings and extrusion dehydration, and shake the obtained cellulose after drying for subsequent use;

[0053] (6) Place the cellulose obtained in (5) in N-methylmorpholine-N-oxide (NMMO), and heat it to 110° C. under vacuum until the cellulose is completely dissolved;

[0054] (7) Inject the cellulo...

Embodiment 3

[0060] Except that the mass ratio of cellulose fiber-based carbon material and potassium carbonate is changed into 1:1.5 in step (9), all the other are the same as embodiment 1.

[0061] Tests show that the prepared reed cellulose-based activated carbon fiber has good adsorption performance on pollutants in aqueous solution, and its methylene blue adsorption value is greater than 760mg / g, which can be used for water purification.

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
pore sizeaaaaaaaaaa
adsorption value of blueaaaaaaaaaa
adsorption value of blueaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of cellulose fiber-based active carbon fibers with the high adsorption capacity. The preparation method comprises the steps of extracting agriculture and forestry byproducts serving as raw materials to obtain cellulose; mixing the obtained cellulose with an N-methylmorpholine-N-oxide to obtain a mixture, heating the mixture in vacuum till the cellulose is completely dissolved to obtain a cellulose solution, and performing electrostatic spinning to obtain cellulose fibers; and carbonizing the cellulose fibers, then mixing the carbonized cellulose fibers with an active agent in a mass ratio of 1 to (1-5), grinding, and performing activation and post-treatment to obtain the active carbon fibers. The cellulose fibers prepared by adopting the special electrostatic spinning process are used as a precursor, carbonized, then physically mixed and activated with the active agent, so that the prepared cellulose fiber-based active carbon fibers have a very good adsorption effect when being applied to water purification treatment.

Description

technical field [0001] The invention relates to the technical field of carbon fiber, in particular to a preparation method of cellulose fiber-based activated carbon fiber with high adsorption capacity, its product and application. Background technique [0002] Activated carbon fiber (ACF), also known as fibrous activated carbon, has abundant micropores (pore diameter less than 2nm), narrow pore size distribution, most of the micropores are directly opened on the surface, the adsorption path is short, and the adsorption rate is fast, even at low concentrations. It still has good adsorption performance and is widely used in water purification, air purification, food decolorization, solvent recovery, drug separation and other industries. [0003] Currently, the preparation of activated carbon fibers consists of three stages: [0004] The first is pretreatment. The pretreatment stage is to prevent certain precursor fibers from melting and decomposing during high-temperature car...

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): B01J20/20B01J20/30C02F1/28
CPCB01J20/20B01J2220/4825C02F1/281
Inventor 李文江崔颖
Owner TIANJIN UNIVERSITY OF TECHNOLOGY