pH值对氧化铝高浓度悬浊液剪切流变性能的影响

1 INTRODUCTION The suspensions employed in ceramic processing are highly concentrated. These snspensions are normally known as slip or slurry in materials science and engi-neering. It is of great interest that concentrated sus-pension exhibit many of the phenomena of very dilute colloidal suspensions[i]. This is probablybecause both the snspension systems have charged particles, so that the principles of colloid chemistry can be applied for them.     

非离子表面活性剂的表面膨胀性质研究

用毛细波 -纵向波技术研究了非离子表面活性剂octaethyleneglycolmonododecylether(C12 E8)的表面膨胀性质。利用毛细波 -纵向波的波数和衰减系数探索了非离子表面活性剂溶液的表面膨胀模量、表面膨胀弹性、表面膨胀粘度、静态膨胀弹性、表面粘度相角与浓度和表面变形频率的关系。还通过表面膨胀性质和Frumkin表面状态方程的研究 ,探讨了非离子表面活性剂溶液的表面吸附动力学性质     

粉唑醇GC和HPLC分析方法

采用气相色谱法和液相色谱法分别对粉唑醇进行了定性和定量分析。气相色谱法中以正二十烷为内标物,色谱柱采用3%OV-101 chromosorb AW DMCS 150-177μm1m×3mm玻璃柱,柱温为195℃,汽化温和检测温均为230℃,方法回收率为99.2%～100.9%,变异系数为0.262%。高效液相色谱法中Nova-PaK C18 250 mm×4.6mm色谱柱,以v(甲醇)+v(水)=851∶5为流动相,检测波长为262nm。方法回收率为98.9%～99.4%,变异系数为0.505%。