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Al2O3-B2O3-SiO2 composite sol, core-shell structure activated carbon fiber and preparation method thereof

A technology of activated carbon fiber and composite sol, applied in the field of activated carbon fiber, can solve the problem of low inherent strength of activated carbon fiber, and achieve the effect of improving the strength

Active Publication Date: 2020-09-04
INST OF CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the above analysis, the embodiment of the present invention aims to provide an Al 2 o 3 -B 2 o 3 -SiO 2 Composite sol, activated carbon fiber with core-shell structure and preparation method thereof, used to solve the technical problem of low intrinsic strength of activated carbon fiber itself in the prior art

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  • Al2O3-B2O3-SiO2 composite sol, core-shell structure activated carbon fiber and preparation method thereof
  • Al2O3-B2O3-SiO2 composite sol, core-shell structure activated carbon fiber and preparation method thereof
  • Al2O3-B2O3-SiO2 composite sol, core-shell structure activated carbon fiber and preparation method thereof

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preparation example Construction

[0039] The preparation material of core-shell structure activated carbon fiber provided by the invention comprises: regenerated cellulose rayon, surface modification molecule maleic anhydride and Al 2 o 3 -B 2 o 3 -SiO 2 Composite sol mixture.

[0040] In the prior art, both maleic anhydride and polycarboxylic acid are used to modify the surface of cellulose fibers, mainly to anchor dye molecules. In this application, a maleic anhydride-modified surface was used to anchor Al 2 o 3 -B 2 o 3 -SiO 2 sol mixture shell, thus forming Al 2 o 3 -B 2 o 3 -SiO 2 The core-shell structure activated carbon fiber of composite oxide ceramic shell layer 1.

[0041] Raw materials of regenerated cellulose man-made fibers include: Lyocell fiber (textile industry standard FZ / T52019-2011), modal fiber (textile industry standard FZ / T 52043-2016), bamboo viscose fiber (textile industry standard FZ / T52043-2016), bamboo viscose fiber (textile industry standard Standard FZ / T 52006-2006),...

Embodiment 1

[0067] The invention provides a method for preparing activated carbon fibers with a core-shell structure, comprising the steps of:

[0068] Step 1. 10 g of regenerated cellulose fiber raw material is impregnated with an acetone solution with a mass concentration of maleic anhydride of 3%, so that the loading of maleic anhydride is 1.5% of the mass of the regenerated cellulose man-made fiber. Afterwards, the fiber raw material adsorbed maleic anhydride was heated to 80° C. for 60 minutes. The purpose of heat treatment was to accelerate the esterification reaction between maleic anhydride and hydroxyl groups on the fiber surface.

[0069] Step 2. Mix 12.25g (0.06mol) aluminum isopropoxide and 6.25g (0.03mol) tetraethyl silicate with 15.2g absolute ethanol evenly. Then add HCl (0.04g, 1.1mmol) / H 2 O (4.36g, 0.242mol), the mixture was stirred at room temperature for 20min to form an alumina-silica primary sol, then 2.92g (0.02mol) triethyl borate was added, and the mixture was he...

Embodiment 2

[0076] The invention provides a method for preparing activated carbon fibers with a core-shell structure, which is used to study Al 2 o 3 -B 2 o 3 -SiO 2 The influence of the aluminum-boron-silicon element ratio (as shown in Table 2) on the mechanical properties of the final core-shell structure activated carbon fiber in the composite sol specifically includes the following steps:

[0077] Step 1. 10 g of Lyocell fiber raw materials are impregnated with an acetone solution with a mass concentration of maleic anhydride of 3%, so that the loading of maleic anhydride is 1.5% of the mass of the regenerated cellulose rayon. Afterwards, the fiber raw material adsorbed maleic anhydride was heated to 80° C. for 60 minutes. The purpose of heat treatment was to accelerate the esterification reaction between maleic anhydride and hydroxyl groups on the fiber surface.

[0078] Step 2. Use Al 2 o 3 -B 2 o 3 -SiO 2 The total molar amount of the precursor raw materials composed of th...

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Abstract

The invention relates to Al2O3-B2O3-SiO2 composite sol, a core-shell structure activated carbon fiber and a preparation method thereof, belongs to the technical field of activated carbon fibers, and solves the technical problem of low intrinsic strength of activated carbon fibers in the prior art. The preparation method of the core-shell structure activated carbon fiber comprises the following steps: 1, carrying out surface modification on a regenerated cellulose fiber by utilizing maleic anhydride to obtain modified regenerated cellulose fiber; 2, carrying out surface modification treatment on the modified regenerated cellulose fiber by using Al2O3-B2O3-SiO2 composite sol, and further carrying out gel curing on the obtained modification layer; and 3, carbonizing and activating the modified regenerated cellulose fiber to obtain the core-shell structure activated carbon fiber with a Al2O3-B2O3-SiO2 composite oxide modification layer. The core-shell structure activated carbon fiber provided by the invention can greatly improve the strength, flexibility and weavability of a product.

Description

technical field [0001] The invention relates to the technical field of activated carbon fibers, in particular to an Al 2 o 3 -B 2 o 3 -SiO 2 Composite sol, activated carbon fiber with core-shell structure and preparation method thereof. Background technique [0002] Fibrous activated carbon is a kind of activated carbon material with unprecedented characteristics. It has been used in practice for more than 20 years. By utilizing its unique pore characteristics and excellent weaving processing performance, it can be used in solvent recovery, VOCs removal and water purification. device is applied. However, its dosage and range are negligible compared with ordinary activated carbon. [0003] With the continuous emergence of new problems in the fields of environmental protection and energy, higher requirements are placed on new materials. Activated carbon fibers need to further develop their unique properties, such as: pore regulation, surface chemical modification, mechan...

Claims

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Application Information

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IPC IPC(8): B01J13/00B01J20/20B01J20/28B01J20/30C01B33/145C01B35/10C01F7/02D01F9/16D06M11/45D06M11/82D06M11/79D06M13/203D06M101/06
CPCB01J13/0086B01J20/20B01J20/28011B01J20/28021B01J20/28064B01J20/28066B01J20/28071B01J20/28073C01B33/145C01B35/1036C01F7/30C01P2004/82D01F9/16D06M11/45D06M11/79D06M11/82D06M13/203D06M2101/06
Inventor 李峰波袁国卿
Owner INST OF CHEM CHINESE ACAD OF SCI
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