天津农学院学报 ›› 2025, Vol. 32 ›› Issue (5): 1-5.doi: 10.19640/j.cnki.jtau.2025.05.001

• •    下一篇

酰基含量对三赞胶流变学特性的影响

李科莹, 贾逸璞, 张莹, 常露元, 权桂芝, 黄海东通信作者   

  1. 天津农学院 农学与资源环境学院,天津 300392
  • 收稿日期:2024-03-15 发布日期:2025-11-12
  • 通讯作者: 黄海东(1972—),男,教授,博士,主要从事植物内生菌、微生物多糖等方面的研究。E-mail:hdhuang@tjau.edu.cn。
  • 作者简介:李科莹(2000—),女,硕士在读,主要从事微生物多糖应用方面的研究。E-mail:yy203411676@163.com。
  • 基金资助:
    天津市技术创新引导专项基金(23YDTPJC00610)

Effect of acyl content on rheological properties of Sanxan gum

Li Keying, Jia Yipu, Zhang Ying, Chang Luyuan, Quan Guizhi, Huang HaidongCorresponding Author   

  1. College of Agronomy and Resource Environment, Tianjin Agricultural University, Tianjin 300392, China
  • Received:2024-03-15 Published:2025-11-12

摘要: 三赞胶是由菌株Sphingomonas sanxanigenens经发酵合成的胞外多糖,其侧链上的酰基基团对三赞胶性质有着重要影响。为探究酰基含量对三赞胶流变学特性的影响,以三赞胶为原料,经碱处理后制得酰基含量不同的脱酰基三赞胶样品,对碱处理时间不同的三赞胶样品的酰基含量进行了测定,研究了不同酰基含量的三赞胶样品在常温、胶凝和胶融过程中的流变学特性。结果显示,虽然脱酰基处理的时间对酰基含量变化的影响不大,但随着处理时间的延长,三赞胶酰基含量逐渐降低,表明常温下天然三赞胶的黏度高于脱酰基三赞胶;胶凝和胶融过程中天然三赞胶的温差更大,热滞现象更加明显;在10 ℃—90 ℃—10 ℃的温度变化范围内,天然三赞胶的DSC曲线变化更显著。说明酰基的存在使得三赞胶的双螺旋结构聚集得更快、更稳定,为三赞胶在食品及其他领域的应用、产品改良、技术创新及推广普及提供了依据。

关键词: 三赞胶, 流变学, 酰基

Abstract: Sanxan is an exopolysaccharide synthesized by fermentation of Sphingomonas sanxanigenens. The acyl groups on the side chain of Sanxanigenens have important influence on the properties of Sanxan gum. In order to investigate the effect of acyl content on the rheological properties of Sanxan gum, deacylated Sanxan gum with different acyl content was prepared by alkali treatment. The content of acyl group in Sanxan gum samples with different alkali treatment time was determined, and the rheological properties of Sanxan gum samples with different acyl group content were studied during room temperature, gelation and melting process. The results showed that although the time of deacylation treatment had little effect on the change of acyl content, the acyl content of trisangel gradually decreased with the extension of the treatment time.The viscosity of natural Sanxan was higher than that of deacylated Sanxan at room temperature. In the process of gelling and melting, the temperature difference of natural Sanxan is larger, and the thermal hysteresis phenomenon is more obvious. In the temperature range of 10 ℃—90 ℃— 10 ℃, the DSC curve of natural Sanxan changes more significantly. The results showed that the existence of acyl group made the double helix structure of Sanxan gum aggregate faster and more stable, which provided a basis for the application, product improvement, technical innovation and popularization of Sanxan gum in food and other fields.

Key words: Sanxan gum, rheology, acyl

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