乙醇阻溶体积分数对魔芋葡甘聚糖结构及性能影响

运用激光粒度仪考察不同乙醇体积分数下的KGM 粒度变化，分析其流变性能差异，并探讨阻溶剂乙醇对KGM 结构的影响。结果显示：KGM 的比表面积随乙醇体积分数增加而逐渐增大，其相对应的中位径、峰值黏度和溶胀速率随之降低，反映出乙醇阻溶体积分数影响其性能的变化。SEM、FT-IR 及X-ray 分析表明高体积分数的乙醇能促使KGM 分子链之间形成的氢键作用加强，局部有序层叠排列的结构，与其性能大小相印证。

Influence of Alcohol Treatment at Various Concentrations on the Structure and Properties of Konjac Glucomannan

The change of KGM particle size in different alcohol concentration (φalcohol) was detected by using laser particle size analyzer, and the differences in rheological performance as well as the effect of alcohol inhibitor solvent on the structure of KGM were investigated. The results showed that the specific surface area of KGM increased with φalcoho, while the medium diameter, peak viscosity (ηmax) and swelling rate reduced, which implied that the concentration of alcohol inhibitor affects the performance of KGM. SEM, FT-IR and X-ray analysis showed that high concentration of alcohol could promote the hydrogen bonds among the molecules chains of KGM, producing a sequentially overlapped structure in part, which can be evidenced by its performance.