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A New Cyclodextrin Polymer with Ultra-fast Adsorption Performance

A technology of cyclodextrin polymer and cyclodextrin, which is applied in the direction of solid adsorbent liquid separation, other chemical processes, separation methods, etc., can solve the problems of slow adsorption rate of organic pollutants and restrictions on industrial production, and achieve rapid removal, The effect of fast adsorption performance and simple synthesis process

Active Publication Date: 2019-12-17
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the prior art, the synthesis of the above-mentioned porous cyclodextrin polymer P-CDP needs to react in the organic phase for a long time (48h) under airtight conditions, which limits its industrial production
Although Alsbaiee et al. also prepared cyclodextrin polymer (NP-CDP) in aqueous phase using cyclodextrin and rigid cross-linking agent, but the obtained polymer is non-porous, and the adsorption rate of organic pollutants is very slow.

Method used

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  • A New Cyclodextrin Polymer with Ultra-fast Adsorption Performance
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  • A New Cyclodextrin Polymer with Ultra-fast Adsorption Performance

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Embodiment

[0058] In order to better understand the present invention, a variety of cyclodextrin polymers were prepared under different conditions (such as cyclodextrin type, rigid cross-linking agent and flexible cross-linking agent type and addition, alkali solution type and concentration, etc.) , and characterize its adsorption effect to various organic micro-pollutants in the aqueous solution, the specific conditions of each embodiment are shown in Table 1. In order to illustrate the adsorption effect of the cyclodextrin polymer prepared by the present invention, two different cyclodextrin polymers were prepared as comparative examples for comparison with reference to the literature. Among them, comparative example 1 prepares a cyclodextrin polymer (EPI-CDP), which is the most researched in the field of adsorption, is also the most mature and has been commercialized. The polymer has a non-porous structure and a very low specific surface area. Comparative Example 2 prepared a recentl...

Embodiment 2

[0120] Example 2, Examples 5-8 prepared cyclodextrin polymers using different rigid crosslinking agents. These rigid crosslinkers include: decafluorobiphenyl, tetrafluoroterephthalonitrile, decafluorobenzophenone, and octafluoronaphthalene, and combinations thereof. Figure 13The adsorption rates of BPA on cyclodextrin polymers prepared by different rigid crosslinking agents are given, and it can be seen that regardless of the single Both of them, or their combination, can be used as rigid crosslinking agent to prepare cyclodextrin polymer with fast adsorption rate, among which tetrafluoroterephthalonitrile and decafluorobenzophenone are the best. Cyclodextrin polymers prepared with different rigid cross-linking agents will have different adsorption properties due to the difference in cross-linking degree and pore structure. The above results indicate that the rigid cross-linking agent containing benzene ring structure mainly acts as a rigid scaffold, enabling the formation o...

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Abstract

A new cyclodextrin polymer with ultra-fast adsorption performance is prepared as follows: cyclodextrin, a rigid cross-linking agent and a non-rigid cross-linking agent are mixed and cross-linked at acertain temperature to obtain a cyclodextrin polymer with a three-dimensional network structure. The polymer can adsorb various organic pollutants in water very quickly, and the adsorbed polymer can be easily regenerated by simple washing at normal temperature, and can be reused for many times without causing degradation of adsorption performance.

Description

technical field [0001] The present invention relates to a novel cyclodextrin polymer with ultra-fast adsorption properties. Background technique [0002] Cyclodextrin is a general term for a class of cyclic oligosaccharides obtained by hydrolysis of starch, usually containing 6 to 12 glucose units. More research and practical significance are molecules containing 6, 7, and 8 glucose units, called α, β, and γ-cyclodextrin, respectively. Cyclodextrin has a ring-shaped cavity structure, which is hydrophilic on the outside and hydrophobic on the inside, so it can form host-guest inclusion complexes with various target molecules. [0003] Since cyclodextrin has certain water solubility, it is usually prepared into various cyclodextrin polymers according to needs. So far, most cyclodextrin polymers are obtained through crosslinking reactions between cyclodextrin and flexible crosslinking agents, such as citric acid and epichlorohydrin. This type of reaction is easy to carry out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/16B01J20/26B01J20/30B01D15/20G01N30/88
CPCB01D15/20G01N30/88C08B37/0012B01J20/264C08K5/0025C08K5/1515C08L5/16C08J3/24
Inventor 谢显传许贵洲秦龙
Owner NANJING UNIV
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