皮革科学与工程 ›› 2023, Vol. 33 ›› Issue (6): 8-16.doi: 10.19677/j.issn.1004-7964.2023.06.002

• 试验研究 • 上一篇    下一篇

羧基化胶原纤维的制备及其对黄酮苷类化合物的分离特性

张琦弦1,2, 孙青永1, 石碧1,2,*   

  1. 1.四川大学轻工科学与工程学院,四川 成都 610065;
    2.四川大学制革清洁技术国家工程实验室,四川 成都 610065
  • 收稿日期:2023-08-06 出版日期:2023-12-01 上线日期:2023-11-14
  • 通讯作者: *石碧(1958-),男,博士,教授,主要从事制革化学、制革清洁技术、胶原资源化利用等研究。E-mail: shibi@scu.edu.cn。
  • 作者简介:张琦弦(1988-),女,硕士,副编审,主要从事胶原基材料功能化研究。E-mail: zhangqx@scu.edu.cn。
  • 基金资助:
    国家自然科学基金(21978176)

Preparation of Carboxyl Grafted Collagen Fiber and its Separation Performances for Flavonoid Glycosides

ZHANG Qixian1,2, SUN Qingyong1, SHI Bi1,2,*   

  1. 1. College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China;
    2. National Engineering Laboratory for Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China
  • Received:2023-08-06 Online:2023-12-01 Published:2023-11-14

摘要: 胶原纤维(CF)可以基于氢键和疏水作用分离黄酮类化合物,但CF对于含葡萄糖基的黄酮苷具有过强的氢键作用,黄酮苷在CF层析柱上洗脱峰拖尾、回收率低。研究利用乙醛酸(GA)将羧基(-COOH)接枝到CF上,增大CF亲水性,提高其与黄酮苷的静电斥力,削弱两者之间的氢键作用,改善黄酮苷洗脱和分离性能。水接触角、水吸收时间和等电点(pI)测定结果表明-COOH成功接枝到了CF上,使GA改性CF(GA-CF)亲水性增大,pI降低。差示扫描量热仪和扫描电镜测定结果表明GA-CF保留了胶原纤维的热稳定性和纤维结构。相比CF,GA-CF对黄芩苷和杨梅苷(黄酮苷代表物)的洗脱和分离效率增大,纯度和回收率显著提高,其分离效率高于聚酰胺,接近Sephadex LH-20,具有良好的应用潜力。

关键词: 胶原, 改性, 柱层析填料, 黄酮苷, 分离

Abstract: Collagen fiber (CF) was previously used as packing material for the separation of flavonoids based on hydrogen bond and hydrophobic interactions. However, as for flavonoid glycosides which are rich in hydroxyls in forming hydrogen bonds, CF presented excessive adsorption capacity, causing the peak tailing and low recovery in column separation. In order to weaken the hydrogen bond interaction and improve the elution rate, carboxyls (-COOHs) were grafted on CF in this work by using glyoxylic acid (GA) to enhance the hydrophilicity of CF and the electrostatic repulsion between CF and flavonoid glycosides. Results of water contact angle, absorption time of water and isoelectric point (pI) determinations proved the successful grafting of -COOHs, and the obtained GA-modified collagen fiber (GA-CF) showed significantly enhanced hydrophilicity and decreased pI. Results of differential scanning calorimetry and scanning electron microscope determinations proved that the thermal stability and special fiber structure of collagen fiber were retained after the reacting with GA. In comparison with CF, GA-CF showed higher elution rates and separation efficiency to baicalin and myricitrin (the typical flavonoid glycosides), leading to much higher purities and recoveries. In fact, the separation performance of flavonoid glycosides on GA-CF was better than that on polyamide and comparable to Sephadex LH-20.

Key words: collagen, modification, packing material, flavonoid glycosides, separation

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