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Cellulose absorbent with controllable structure and preparation method thereof

A cellulose and adsorbent technology, applied in the field of functional polymer materials, can solve problems such as narrow molecular weight distribution, and achieve the effects of large adsorption capacity, good adsorption performance and low price

Inactive Publication Date: 2014-04-09
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the present invention, natural cellulose is used as raw material, active radical polymerization of glycidyl methacrylate is carried out in ionic liquid, epoxy groups are introduced, and amination reagent is used for amination ring-opening modification to prepare a structure-controllable, The cellulose adsorbent with a narrow molecular weight distribution has practical application value in the adsorption of heavy metal pollutants, and there are no related reports so far.

Method used

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  • Cellulose absorbent with controllable structure and preparation method thereof
  • Cellulose absorbent with controllable structure and preparation method thereof
  • Cellulose absorbent with controllable structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: the specific steps of this embodiment are as follows:

[0036] (1) Homogeneous graft copolymerization of cellulose in ionic liquid:

[0037] The raw material components used in this embodiment are as follows:

[0038] Absorbent cotton: 0.51 kg

[0039] Ionic liquid ([Emim]Cl): 65.79 kg

[0040] Chloroacetyl chloride: 3.33 kg

[0041] Cuprous bromide: 1.67 kg

[0042] 2-2 bipyridine: 1.19 kg

[0043] Ascorbic acid: 0.20 kg

[0044] Glycidyl methacrylate monomer: 27.31 kg

[0045] Process steps and parameters of living radical polymerization of cellulose in ionic liquid: put 0.51 kg of absorbent cotton and 65.79 kg of ionic liquid ([Emim]Cl) into the reactor, dissolve at 90°C for 5 hours, and form a mass fraction of 0.77% cellulose-ionic liquid solution; the above solution was cooled to 50°C, 3.33 kg of chloroacetyl chloride was added, reacted for 5 hours, and then nitrogen gas was passed, and 1.80 kg of cuprous bromide, 1.26 kg of 2-2 bipyridine, 0.0...

Embodiment 2

[0053] Embodiment 2: the specific steps of this embodiment are as follows:

[0054] (1) Homogeneous graft copolymerization of cellulose in ionic liquid:

[0055] The raw material components used in this embodiment are as follows:

[0056] Cotton fiber: 0.23 kg

[0057] Ionic liquid ([Bmim]Cl): 80.73 kg

[0058] Bromoacetyl bromide: 2.18 kg

[0059] Cuprous chloride: 3.46 kg

[0060] N,N,N',N'',N''-pentamethyldiethylenetriamine: 1.74 kg

[0061] Stannous octoate: 1.30 kg

[0062] Glycidyl methacrylate monomer: 10.36 kg

[0063] The process steps and parameters of living radical polymerization of cellulose in ionic liquid: 0.23 kg of cotton fiber and 82.03 kg of ionic liquid ([Bmim]Cl) were put into the reactor, dissolved at 100°C for 4 hours, and the mass fraction was 0.28 % of cellulose-ionic liquid solution; cool the above solution to 20°C, add 2.18 kg of bromoacetyl bromide, react for 4 hours, and then pass nitrogen, add 3.46 kg of cuprous chloride, 1.74 kg of N,N,N',...

Embodiment 3

[0071] Embodiment 3: the specific steps of this embodiment are as follows:

[0072] (1) Homogeneous graft copolymerization of cellulose in ionic liquid:

[0073] The raw material components used in this embodiment are as follows:

[0074] Absorbent cotton: 0.61 kg

[0075] Ionic liquid ([Amim]Cl): 41.83 kg

[0076] Chloroacetyl chloride: 5.27 kg

[0077] Nail bromide: 0.78 kg

[0078] 2-Pyridineformaldehyde n-propylamine: 0.39 kg

[0079] Vitamin C: 0.96 kg

[0080] Glycidyl methacrylate monomer: 50.16 kg

[0081] Process steps and parameters of living radical polymerization of cellulose in ionic liquid: put 0.61 kg of absorbent cotton and 41.83 kg of ionic liquid ([Amim]Cl) into the reactor, dissolve at 90°C for 5 hours, and form a mass fraction of 1.44% cellulose-ionic liquid solution; the above solution was cooled to 50°C, 5.27 kg of chloroacetyl chloride was added, reacted for 1 hour, and then nitrogen gas was passed, and 0.78 kg of nail bromide, 0.78 kg of 2-pyridi...

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Abstract

The invention discloses a cellulose absorbent with a controllable structure and a preparation method of the cellulose absorbent. The preparation method comprises the following steps of grafting polymerizing cellulose by adopting cotton fibers as raw materials and iminazole ion liquid as a solvent through the polymerization of active free radicals, introducing an epoxy basic group, and aminated ringopening the cellulose grafted polymer by utilizing an amination reagent to prepare the cellulose absorbent with the controllable structure. The cellulose absorbent is faint yellow or white particles, the weight-average molecular weight is 6000 to 69000, the molecular weight distribution is 1.02 to 1.2, the content of nitrogen is 10. 16 to 23.59 percent, the molecular weight is narrow in distribution, the structure is controllable, and a good absorption effect on cation and anion pollutants can be realized.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a cellulose adsorbent with controllable structure and a preparation method thereof. Background technique [0002] Cellulose is one of the renewable polymers with the most abundant reserves and the oldest existence on the earth. It is cheap, degradable and does not pollute the environment. Therefore, all countries in the world attach great importance to the research and development of cellulose. . Today in the 21st century, countries all over the world are paying more and more attention to the problem of environmental pollution. People pay more attention to the biodegradability and environmental coordination of cellulose, the most abundant natural polymer material on the earth, and step up the research on its functionality. Research and development is very necessary. Cellulose is the natural macromolecular compound with the largest reserves in nature, and ...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C08F251/02C08F8/32
Inventor 林春香乔莎刘明华刘丹慧刘以凡
Owner FUZHOU UNIV
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