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Biomass based network-like porous composite material and preparation method thereof

A reticular porous, composite material technology, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve the problems of poor cycle performance and weak adsorption force of composite materials, achieve low cost, improve adsorption force, Simple process and environmentally friendly results

Active Publication Date: 2018-04-27
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the problems of poor cycle performance of the composite material caused by the inhomogeneous and weak adsorption force of the existing mesh material, and provides a mesh-like porous composite material with a biomass substrate and a preparation method thereof

Method used

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  • Biomass based network-like porous composite material and preparation method thereof
  • Biomass based network-like porous composite material and preparation method thereof
  • Biomass based network-like porous composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing a biomass-based porous composite material, comprising the following steps,

[0033] (1) Preparation of CMC gel

[0034] First mix 0.4889g CMC with 10mL H 2 O was slowly added into a 250mL round-bottomed flask in 3 times, and the device was sealed and placed in a water bath at 50°C for 25min with mechanical stirring at a speed of 200rpm / min, which was recorded as CMC gel.

[0035] (2) Preparation of BTC solution

[0036] Dissolve 0.4889g of BTC in 6mL of absolute ethanol, and ultrasonically dissolve it for 5 minutes, and record it as BTC solution;

[0037] (3) Preparation of composite materials of CMC-BTC

[0038] Add the BTC mixed solution dropwise into the CMC gel, and stir it mechanically for 20 min. Pour the mixed solution into a polytetrafluoroethylene mold inserted with a 30° beveled copper sheet, seal it with a plastic wrap, place it in a container containing liquid nitrogen at a rate of 0.5 cm / s, freeze it for 5 minutes, and then quickl...

Embodiment 2

[0044] A method for preparing a biomass-based porous composite material, comprising the following steps,

[0045] (1) Preparation of CMC gel

[0046] First mix 4.889g CMC with 100mL H2 O was slowly added to a 250 mL round-bottomed flask in 10 times, and the device was sealed and placed in a water bath at 60 °C for mechanical stirring for 50 min at a rotational speed of 500 rpm / min, which was designated as CMC gel.

[0047] (2) Preparation of BTC solution

[0048] Dissolve 3.85g BTC in 60mL absolute ethanol, ultrasonicate for 10min to fully dissolve it, and record it as BTC solution;

[0049] (3) Preparation of CMC-BTC composites

[0050] The BTC mixed solution was added dropwise to the CMC gel and mechanically stirred for 30 min. Pour the mixed solution into a polytetrafluoroethylene mold with a 10° beveled copper sheet, seal it with plastic wrap, place it in a container containing liquid nitrogen at 0.5cm / s, freeze it for 5 minutes, and quickly put it into freeze-drying. ...

Embodiment 3

[0056] A preparation method of a biomass-based reticulated porous composite material, comprising the following steps:

[0057] (1) Preparation of CMC gel

[0058] First, 0.4889g of CMC and 10mL of H2O were slowly added to a 250mL round-bottomed flask several times, and the device was sealed and placed in a water bath at 55°C for mechanical stirring for 30min at a speed of 300rpm / min, denoted as CMC gel.

[0059] (2) Preparation of BTC solution

[0060] Take 0.385g BTC and dissolve it in 6mL absolute ethanol, ultrasonicate for 3min to make it fully dissolved, and record it as BTC solution;

[0061] (3) Preparation of CMC-BTC composites

[0062] The BTC mixed solution was added dropwise to the CMC gel and mechanically stirred for 30 min. Pour the mixed solution into a polytetrafluoroethylene mold with a 15° beveled iron sheet, seal it with plastic wrap, place it in a container containing liquid nitrogen at 0.6 cm / s, freeze it for 4 minutes, and quickly put it into freeze-dryi...

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Abstract

The invention discloses a preparation method of a biomass based network-like porous composite material. The method includes the steps of: stirring and mixing a sodium carboxymethylcellulose gel (CMC)and a trimesic acid (BTC) solution according to the mass ratio of 1-4:1, and then pouring the uniformly mixed solution into a polytetrafluoroethylene mold, a metal sheet inserted in the bottom thereof; sealing the mold and placing the mold in a container filled with liquid nitrogen to rapidly freezing the mold for 4-10 min, and rapidly placing the mold in a freeze-drying machine to dry the material for 25-32 h, and taking out the mold to produce the biomass based network-like porous composite material. In the invention, the CMC-BTC composite material is produced in an ice-solidification freezing method, so that during the freeze-drying process, a regular ice crystal network structure can be formed in the composite material, which can significantly increase the adhesion force and dispersionuniformity of other adsorption molecules on the network structure. The product can be used for removing heavy metal ions in high-concentration organic wastewater.

Description

technical field [0001] The invention belongs to the field of novel functional materials, and in particular relates to a mesh material and a preparation method thereof. Background technique [0002] With the advancement of urbanization in modern society and the rapid development of industry, more and more domestic sewage and industrial wastewater are discharged into rivers, lakes and seas, and the wastewater contains a large amount of heavy metal ions, which has become the focus of attention. Industrial wastewater is the cause of The main pollution source of serious environmental pollution, in which heavy metal ions Cu 2+ , Pb 2+ , Cd, Hg + and Ni 3+ The proportion of its compounds is relatively high. How to degrade heavy metals is one of the main problems in the field of water pollution control at present. However, due to the poor selectivity of general adsorption composite materials, it strongly interferes with the adsorption selectivity of heavy metals in high-concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28
CPCB01J20/22B01J20/24B01J20/28061B01J20/28083C02F1/285C02F1/286
Inventor 赵钟兴崔馨方孙晓丹魏雅男赵祯霞
Owner GUANGXI UNIV
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