Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (11): 20220405.doi: 10.7503/cjcu20220405

• Polymer Chemistry • Previous Articles     Next Articles

Low Critical Dissolution Temperature Behavior of βCyclodextrin and Its Application in the Preparation of βCyclodextrin Sheet Crystal with Ordered Nano⁃channel

TAN Lejian1, ZHONG Xuanshu1, WANG Jin2(), LIU Zongjian3, ZHANG Aiying1, YE Lin1(), FENG Zengguo1   

  1. 1.School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China
    2.Key Laboratory of Multifunctional Nanomaterials and Smart Systems,Suzhou Institute of Nano?Tech and Bionics,Chinese Academy of Sciences,Suzhou 215123,China
    3.Beijing Rehabilitation Hospital,Capital Medical University,Beijing 101144,China
  • Received:2022-06-08 Online:2022-11-10 Published:2022-08-21
  • Contact: WANG Jin,YE Lin E-mail:jwang2014@sinano.ac.cn;yelin@bit.edu.cn
  • Supported by:
    the Suzhou Municipal Science and Technology Bureau Basic Research Project, China(SJC2021008)

Abstract:

In this paper, β-cyclodextrin(β-CD) was dissolved in NN-dimethylformamide solution(DMF), and a large number of white crystals were precipitated after the solution was heated to 140 ℃. It was found that the precipitated crystals were β-CD sheet crystals by scanning electron microscopy(SEM) as well as infrared Spectroscopy(IR) and Nuclear magnetic resonance(NMR). Thermogravimetric analysis(TGA) and differential scanning calorimetry(DSC) analysis showed that the sheet crystals had the same physical and chemical properties as β-CD raw materials. The X-rays diffraction(XRD) results showed that β-CD sheet had different crystalline structure from β-CD raw materials. The XRD patterns of β-CD crystal with open-chanel crystalline structure were simulated by Diamond software, which is consistent with that of β-CD sheet, indicating that β-CD sheet has ordered open-channel crystalline structure. Brunauer-Emmett-Tellern(BET) measurement and phenolphthalein adsorption experiment further confirmed that β-CD sheet had larger specific surface area and better adsorption performance than β-CD raw materials.

Key words: β?Cyclodextrin, Low critical dissolution temperature(LCST), Channel crystalline structure, Sheet crystal, Adsorption

CLC Number: 

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