Ionic liquid crosslinked chitosan modified zeolite adsorbent material, preparation method and application thereof
A cross-linked chitosan and ionic liquid technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., to achieve good resource recycling value and application prospects, increase active sites, and reduce costs Effect
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[0042] Example 1:
[0043] Preparation method of ionic liquid cross-linked chitosan modified zeolite adsorption material:
[0044] (1) Take 10g of chitosan (acetylation ≥95%), mix it with 50g of functionalized ionic liquid 1-hydroxyethyl-3-methylimidazole chloride in a weight ratio of 1:5, and stir for 1 hour to make The two substances undergo a cross-linking reaction to increase the functionality of chitosan and obtain a first-level cross-linked chitosan-ionic liquid solution (CTS-IL);
[0045] (2) Take 10g of the above-mentioned primary cross-linked chitosan-ionic liquid solution, and add the liquid polymer to the chitosan-ionic liquid solution, polyethylene glycol and epichlorohydrin at a weight ratio of 20:1:1. 0.5g of ethylene glycol PEG600 and 0.5g of epichlorohydrin, mechanically stirred at 80℃ for 4 hours to make pores and crosslink the product, so that the porosity of the product reaches 50% and the degree of crosslinking increases to 60 % To obtain a secondary crosslinked...
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[0048] Example 2:
[0049] Preparation method of ionic liquid cross-linked chitosan modified zeolite adsorption material:
[0050] (1) Take 10g of chitosan (acetylation ≥95%) and mix it with 30g of functionalized ionic liquid 1-carboxymethyl-3-methylimidazole hexafluorophosphate according to the weight ratio of 1:3, and stir and react for 1 hour , Make the two substances cross-linking reaction, improve the functionality of chitosan, and obtain a first-level cross-linked chitosan-ionic liquid solution (CTS-IL);
[0051] (2) According to the weight ratio of chitosan-ionic liquid solution and polyethylene glycol of 25:1, and the weight ratio of chitosan-ionic liquid solution to epichlorohydrin of 25:1, take the above-mentioned cross-linked shell 10g of glycan-ionic liquid solution, add 0.4g of liquid polyethylene glycol PEG600, add 0.4g of epichlorohydrin, and mechanically stir at 80℃ for 4 hours to make holes and crosslink the product to make the product The porosity reaches 50%, the...
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[0054] Example 3:
[0055] Preparation method of ionic liquid cross-linked chitosan modified zeolite adsorption material:
[0056] (1) Take 10g of chitosan (acetylation ≥95%) and mix it with 80g of functionalized ionic liquid N-sulfonic acid butylpyridine bisulfate in a weight ratio of 1:8 for 1 hour to make two substances Cross-linking reaction occurs to increase the functionality of chitosan and obtain a first-level cross-linked chitosan-ionic liquid solution (CTS-IL);
[0057] (2) Take 10g of the above-mentioned cross-linked chitosan-ionic liquid solution, and add polyethylene glycol according to the weight ratio of chitosan-ionic liquid solution to polyethylene glycol and epichlorohydrin at 20:1:1. 600 0.5g and epichlorohydrin 0.5g, mechanically stirred at 80°C for 4 hours to make pores and crosslink the product, so that the porosity of the product reaches 50%, and the degree of crosslinking increases to 60%. Secondary cross-linked chitosan-ionic liquid solution (CTS-IL);
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