高吸水性淀粉吸水倍率测定条件研究

文章采用自然过滤法研究高吸水性淀粉吸水倍率的测定条件,考察了样品颗粒大小、网筛孔径、水用量、吸水时间、滤水时间、吸液种类、温度及pH值等对高吸水性淀粉吸水倍率测定结果的影响。实验结果表明:高吸水性淀粉吸水倍率最佳测定条件为:颗粒大小为120～150目,滤网孔径为100目,去离子水用量与高吸水性淀粉质量比为1 200:1,吸水时间为40 min,滤水时间为60 min,吸液pH=7。在该条件下测定的吸水倍率能反映高吸水性淀粉的真实吸水倍率;吸液温度对测定结果几乎无影响;氯化钠溶液显著降低了高吸水性淀粉的吸水倍率,浓度越高则吸水倍率降低越多。

Determination Conditions Research on Super-absorbent Starch's Water Absorbency

The paper adopts natural filtration method to study the determination conditions of super-absorbent starch's water absorbency,examining various elements which influence the measured results,including sample particle size,screen aperture,water quantity,absorbing time,drainage time,absorbing types,temperature and PH value.Experimental result shows that the best measure condition of super-absorbent starch's water absorbency is:particle size 120-150 meshes, screen aperture 100 meshes,ratio of deionized water qu...