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Structure-controllable cellulose graft copolymer and montmorillonite composite and preparation method thereof

A technology of cellulose grafting and composite materials, applied in the field of polymer nanocomposite new materials, to achieve the effects of easy operation, mild reaction conditions, and easy recycling

Inactive Publication Date: 2012-09-26
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the cellulose copolymer with a controllable graft structure and montmorillonite intercalation are used as an adsorbent, it will not only greatly enhance the adsorption capacity of the material, but also realize multiple adsorption functions at the same time, which will open up new developments for adsorbents. direction, but there is no composite material combining structure-controllable cellulose graft copolymer and inorganic materials such as montmorillonite in the prior art

Method used

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  • Structure-controllable cellulose graft copolymer and montmorillonite composite and preparation method thereof
  • Structure-controllable cellulose graft copolymer and montmorillonite composite and preparation method thereof
  • Structure-controllable cellulose graft copolymer and montmorillonite composite and preparation method thereof

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Effect test

Embodiment 1

[0035]0.2 g of bamboo fiber was dissolved in 10.0 g of 1-allyl-3-methylimidazolium chloride ionic liquid to obtain a cellulose ionic liquid solution with a concentration of 2%, and 1.7 g of 2-chloroacetyl chloride was added dropwise. After stirring for 10 h, a cellulose macroinitiator with a degree of substitution of 2.4 was prepared. Take 0.4 g of the above-mentioned cellulose macromolecular initiator and dissolve it in tetrahydrofuran, add 14.8 g of methyl methacrylate containing 1.4% by weight of montmorillonite, and 2.8 g of N,N-bipyridine successively under the protection of nitrogen. Under the bath, carry out 3 times of vacuum-filling nitrogen cycle, under N 2 Add 0.85 g molar ratio of CuBr under protection, then perform 3 times vacuum-nitrogen cycle, and then react in 80 °C oil bath for 0.5 h to obtain cellulose graft copolymer / montmorillonite composite material, macromolecular initiator The molar ratio of catalyst, ligand and polymerizable monomer is 1:1:8:50. The gr...

Embodiment 2

[0037] 1 g cotton fiber was dissolved in 10.0 g 1-butyl-3-methylimidazolium chloride ionic liquid to obtain a cellulose ionic liquid solution with a concentration of 10%, and 6.7 g of 2-bromopropionyl bromide was added dropwise, at 70°C The reaction was stirred for 2 h to prepare a cellulose macroinitiator with a degree of substitution of 1.5. Take 0.2 g of the above-mentioned cellulose macromolecular initiator and dissolve it in DMF, add 24.1 g of hydroxyethyl methacrylate containing 1% by weight of montmorillonite and 0.21 g of tetramethylethylenediamine successively under the protection of nitrogen. Under the bath, carry out 3 times of vacuum-filling nitrogen cycle, under N 2 Under protection, 0.18 g molar ratio of CuCl was added for 3 times of vacuum-filling nitrogen cycle, and then reacted in an oil bath at 60°C for 8 h to obtain a cellulose graft copolymer / montmorillonite composite material, a macromolecular initiator, and a catalyst The molar ratio of , ligand and poly...

Embodiment 3

[0039] 3 g of wood pulp fibers were dissolved in 10.0 g of 1-allyl-3-methylimidazolium chloride ionic liquid to obtain a 30% cellulose ionic liquid solution, and 2.4 g of 2-chloropropionyl chloride was added dropwise at 25°C Stirring and reacting for 96 h, a cellulose macroinitiator with a degree of substitution of 1.2 was prepared. Take 0.1 g of the above-mentioned cellulose macromolecular initiator and dissolve it in DMSO, and add 9.5 g of tert-butyl acrylate containing 1.8% by weight of montmorillonite and 0.93 g of N,N-bipyridine successively under nitrogen protection. Carry out 3 times of vacuum-filling nitrogen cycle under N 2 Under protection, 0.21 g molar ratio of CuBr was added for 3 times of vacuum-nitrogen cycle, and then reacted in an oil bath at 90°C for 6 h to obtain a cellulose graft copolymer / montmorillonite composite material, a macromolecular initiator, and a catalyst The molar ratio of , ligand and polymerizable monomer is 1:2:8:100. The grafting rate of c...

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Abstract

The invention discloses a structure-controllable cellulose graft copolymer and montmorillonite nano composite and a preparation method thereof. The nano composite comprises structure-controllable cellulose graft copolymer with different graft monomers and montmorillonite, and is formed by intercalating cellulose graft side chains with montmorillonite and characterized in that the cellulose graft copolymer is positioned at the interlamination of the montmorillonite, and the cellulose graft side chains are structurally controlled by adjusting atom transfer radical polymerization reaction time. The preparation method includes: preparing cellulose macroinitiator through homogeneous phase acylation reaction in ionic liquid, initiating atom transfer radical polymerization reaction under the catalyst action, and performing polymer in-situ intercalation reaction to obtain the structure-controllable cellulose graft copolymer and montmorillonite nano composite. The method is simple, process conditions are mild, and the prepared composite has excellent adsorbability to heavy metal ions, organic pollutants, dyes and the like and can be used for the field of wastewater treatment.

Description

technical field [0001] The invention relates to the field of new polymer nanocomposite materials, in particular to a structure-controllable cellulose copolymer / montmorillonite composite material and a preparation method thereof, which is grafted by atom transfer radical polymerization from cellulose and functional monomers A new polymer nanocomposite material prepared by intercalation with montmorillonite during copolymerization. Background technique [0002] Cellulose is the most abundant natural polymer material on the earth. It has the advantages of non-toxicity, low price, biodegradability and good biocompatibility, and is an environmentally friendly material. Cellulose has the characteristics of multi-capillary, porous and large specific surface area, and has certain adsorption capacity. However, the adsorption capacity of natural fiber itself is not strong, and the introduction of functional groups with strong adsorption properties through the modification of hydroxyl...

Claims

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Application Information

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IPC IPC(8): C08L51/00C08K3/34C08F251/02C08F2/00
Inventor 武荣兰郑燕坪徐世美王吉德田玲园
Owner XINJIANG UNIVERSITY
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