Sulfydryl cellulose porous material as well as preparation method and application thereof

A technology of porous materials and cellulose, applied in other chemical processes, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of unenvironmental protection of reaction reagents, cumbersome preparation process, and low sulfhydryl content, and achieve Effects of improving mechanical properties, abundant sources, and uniform pore size distribution

Active Publication Date: 2017-09-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the cumbersome preparation process of the traditional commercial heavy metal enrichment agent mercapto cotton, the required reaction reagents are not environmentally friendly, the specific surface area is small, the mercapto group content is low, and the mechanical properties are poor, so its application is limited to a certain extent. To develop a new Efficient thiol-functionalized porous materials are particularly important

Method used

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  • Sulfydryl cellulose porous material as well as preparation method and application thereof
  • Sulfydryl cellulose porous material as well as preparation method and application thereof
  • Sulfydryl cellulose porous material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Weigh 10g of 1.2wt% wood pulp cellulose nanowire suspension, the diameter of cellulose nanowire is 1-200nm, and the length is 50-700nm; add mercaptosilane coupling agent KH-590 to cellulose nanowire In the suspension, at room temperature, use hydrochloric acid to adjust pH=5.0, and magnetically stir for 2 hours to fully hydrolyze and condense the methoxy group on the mercaptosilane coupling agent KH-590 to obtain a mixed suspension; wherein, the cellulose nanowire and silane The mass ratio of coupling agent KH-590 is 1:1.

[0029] (2) Put the mixed suspension prepared in (1) into liquid nitrogen for rapid freezing to obtain a frozen gel, put it into a freeze dryer for freeze drying, and place it in an oven at 105°C for 30 minutes to solidify after drying to increase the mercapto group The degree of cross-linking between the silane coupling agent and cellulose was obtained to obtain a porous material of mercaptocellulose, and the measured specific surface area was 7....

Embodiment 2

[0031] (1) Weigh 10g of 0.6wt% carboxylated cellulose nanowire suspension, the diameter of the cellulose nanowire is 1-200nm, and the length is 50-700nm; add mercaptosilane coupling agent KH-590 to the cellulose nanowire In the suspension, adjust the pH to 5.0 with hydrochloric acid at room temperature, and stir magnetically for 2 hours to fully hydrolyze and condense the methoxy group on the mercaptosilane coupling agent KH-590 to obtain a mixed suspension; wherein, the carboxylated cellulose nanowire The mass ratio of mercaptosilane coupling agent KH-590 is 1:2.

[0032] (2) Put the mixed suspension prepared in (1) into liquid nitrogen for rapid freezing to obtain a frozen gel, put it into a freeze dryer for freeze drying, and place it in an oven at 110°C for 30 minutes to solidify after drying to increase the mercapto group The degree of cross-linking between the silane coupling agent and cellulose is obtained to obtain a porous material of mercaptocellulose, and the measur...

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Abstract

The invention relates to a sulfydryl cellulose porous material as well as a preparation method and application thereof. The sulfydryl cellulose porous material contains the raw material components of cellulose suspension liquid and a sulfydryl silane coupling agent in a mass ratio of (1 to 0.3)-(1 to 4). The preparation method comprises the following steps: adding the sulfydryl silane coupling agent into the cellulose suspension liquid, adjusting the pH value, and stirring at the room temperature, so as to obtain cellulose-silane suspension liquid; and freezing the cellulose-silane suspension liquid in liquid nitrogen so as to obtain cellulose-silane icy gel, and carrying out freeze drying, baking and curing, so as to obtain the sulfydryl cellulose porous material. Compared with the existing commercial enrichment adsorbent, namely sulfydryl cotton, in the prior art, the sulfydryl cellulose porous material has excellent performance of uniform porous mesh structure, relatively large specific surface area, relatively high sulfydryl content and good mechanical property, reaction raw materials are environment-friendly, reaction conditions are mild, and the process is simple, efficient and controllable. The sulfydryl cellulose porous material has wide application prospects in the fields of heavy metal adsorption, enrichment and detection, catalyst carriers, chromatographic separation and analysis and the like.

Description

technical field [0001] The invention belongs to the field of functional cellulose porous material and its preparation and application, in particular to a mercapto cellulose porous material and its preparation and application. Background technique [0002] Porous material is a material with a network structure composed of interpenetrating or closed pores. Generally, it is a three-dimensional structure formed by the aggregation of a large number of polyhedral pores in space. The material has high specific surface area, high porosity, low relative density, and excellent performance. With the advantages of adjustable aperture. As a natural polymer, cellulose has the characteristics of abundant sources, good biocompatibility, and easy biodegradation compared with synthetic organic polymers. Cellulose-based porous materials have attracted extensive attention from researchers and have been widely used in catalysts. Carrier, high-efficiency adsorbent, thermal insulation layer, chro...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30B01J31/06B01J35/10B01J32/00
CPCB01J20/24B01J20/28054B01J31/06B01J35/60
Inventor 隋晓锋荣立夺朱足妹毛志平徐红张琳萍王碧佳钟毅
Owner DONGHUA UNIV
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