库德兰水凝的微观结构和机械行为:热预处理温度的作用
Jingwen Zhao1, Peng Wu1, Jun He1
1Department of Food Science and Engineering, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China.
Carbohydrate polymers
|August 16, 2025
概括
热预处理通过削弱其结构来定制的凝. 这种方法产生一种与脂肪相似的纹理的黄凝,具有作为食物脂肪替代品的潜力.
科学领域:
- 食品科学 食品科学 食品科学
- 材料科学 是一种材料科学.
- 生物聚合物的化学化学
背景情况:
- 库德兰是一种细菌多糖,形成强烈的,热不可逆转的凝.
- 高凝强度限制了Curdlan在食品中的应用.
- 定制Curdlan凝的特性对于食品工业更广泛的应用至关重要.
研究的目的:
- 调查热预处理作为修改凝特性的一种方法.
- 了解前处理温度如何影响凝微观结构和机械特性.
- 探索改性草作为食品配方中的脂肪替代剂的潜力.
主要方法:
- 在90°C凝结之前,Curdlan悬浮剂在各种温度 (40-80°C) 上进行预处理.
- 评估了凝的机械性能 (硬度,粘性弹性).
- 使用冷扫描电子显微镜分析了微观结构.
- 分子相互作用通过里埃变换红外光谱和X射线衍射来研究.
主要成果:
- 在48-58°C范围内的预处理显著削弱了黄凝网络.
- 与未经处理的凝相比,预处理的凝表现出较低的硬度和粘性弹性.
- 微结构分析显示,在预处理后,毛孔尺寸增加和网络密度减少.
- 光谱和衍射数据表明,键被破坏,三螺旋形成发生了变化.
结论:
- 热预处理,特别是在50°C左右,通过影响网络形成,链的移动性和三环螺旋组件来调节curdlan凝.
- 这种对凝结构和性质的控制为食品应用提供了一个新的策略.
- 4%的库德兰配方 (CU-50-90) 显示出与猪脂肪组织相似的纹理特性,表明其作为脂肪替代剂的潜力.
- 该研究提出了一种环保,无添加剂的方法,以增强Curdlan的工业效用.
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