Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1600, Issue -, Pages 80-86Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2019.04.056
Keywords
Carboxyl-functional modification; Porous beta-cyclodextrin polymer; Dispersive solid-phase extraction; Lysozyme
Funding
- National Natural Science Foundation of China [21775100]
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Lysozyme is widely used in medical, food and industrial fields due to its bacteriolytic effect and thus it is significant to design and develop a specific adsorbent with high adsorption capacity and selectivity for lysozyme. Inspired by the high uptake capacity of tetrafluoroterephthalonitrile-crosslinked porous beta-cyclodextrin polymers (P-CDPs) and the noncovalent interaction between lysozyme and carboxyl groups, the carboxyl-functionalized P-CDPs (P-CDP-COO-) were synthesized by base-catalysed hydrolysis of nitrite group in P-CDPs to carboxyl. Porous structure, large extent of carboxylic functional groups, cyclodextrin's preventing aggregation, and negatively charged make P-CDP-COO- possess an outstanding adsorption capability for lysozyme. The maximum saturated adsorption capacity reaches 1520 mg g(-1), which is much better than the parent polymer and other reported materials. The as-prepared material was successfully utilized for the selective extraction of lysozyme from egg white. (C) 2019 Elsevier B.V. All rights reserved.
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