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pectin和半纤维素对细菌纤维素的物理特性的影响
Justyna Cybulska1, Jolanta Cieśla1, Magdalena Kurzyna-Szklarek1
1Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland.
Food chemistry
|July 28, 2023
概括
这项研究探讨了将多糖添加到细菌纤维素 (BC) 膜中如何影响其特性. 加入这些化合物改变了膜的组成,吸水能力和热稳定性,而西洛格卢干显著增加了膜的硬度.
科学领域:
- 材料科学 材料科学 材料科学
- 生物化学 生物化学
- 聚合物科学 聚合物科学
背景情况:
- 细菌纤维素 (BC) 是一种具有独特特性的生物聚合物.
- 用多糖化合物修改BC膜可以改变它们的特性.
- 了解这些修改对于开发先进生物材料至关重要.
研究的目的:
- 为了研究各种多糖类对in situ生物合成细菌纤维素薄膜的特性的影响.
- 分析薄膜组成,水吸收,热稳定性和纳米结构的变化.
- 为了确定特定多糖类对BC膜特性的影响.
主要方法:
- 在细菌纤维素薄膜的现场生物合成中添加了多糖体 (pectin,arabinan,rhamnogalacturonan I,arabinoxylan,xyloglucan,glucomannan).
- 薄膜组成的分析,包括非纤维素多糖含量.
- 原子力显微镜 (AFM) 用于纳米结构分析.
- 福利埃变换红外 (FT-IR) 和拉曼光谱用于结构特征.
- 评估水的吸收和热稳定性.
主要成果:
- 多糖添加物将非纤维素单糖合并到BC膜中,达到高达26.7%.
- 经过修改的膜显示了水吸收的改变和热稳定性的降低.
- AFM揭示了减少的纤维素纳米纤维尺寸.
- FT-IR和拉曼光谱表明纤维素Iα全形形式的减少,结晶度的改变,以及链条的长度,特别是与西洛格卢干和葡萄甘.
- 添加西洛格卢干导致薄膜硬度的最显著增加.
结论:
- 将多糖化合物纳入BC膜可以显著改变它们的物理化学特性.
- 观察到的纳米结构和结晶性的变化与改变的热稳定性和水吸收相关.
- 糖在增强细菌纤维素薄膜的机械性能 (硬度) 方面特别有效.
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