线状聚羧酸高效减水剂在陶瓷坯料颗粒表面的吸附行为

Adsorption Behavior of Polycarboxylate Superplasticizer of Linear at Particle Surfaces of Ceramic Body

摘要:

通过测定添加了2种自制不同分子结构聚羧酸高效减水剂的陶瓷坯体料浆黏度以评价其分散性能，采用静态吸附实验，研究了陶瓷坯料吸附2种自制聚羧酸高效减水剂的动力学规律，用准二级动力学模型对其吸附过程进行拟合，结果显示，在陶瓷坯体料浆中，线状MA/AA/AMPS聚羧酸高效减水剂的分散效能明显好于梳状AMPS改性聚丙烯酸高效减水剂，其平衡吸附量是梳状AMPS改性聚丙烯酸高效减水剂的2倍以上，陶瓷坯料颗粒表面对2种聚羧酸高效减水剂的吸附均符合准二级反应动力学模型。

Abstract:

The ceramic body slurry's viscosity are determined to characterize the dispersion property of ceramic body slurry with two self-made polycarboxylate superplasticizer of different molecular structures. The experiment of static adsorption studied kinetic study about adsorption of two self-made polycarboxylate superplasticizer using ceramic blank. The test data were further analyzed with pseudo-second order kinetics. The results show that the dispersion property of polycarboxylate superplasticizer of linear MA/AA/AMPS is much better than that of comb AMPS-modified polyacrylic acid superplasticizer in the ceramic body slurry. The saturation amount of polycarboxylate superplasticizer of linear MA/AA/AMPS adsorbed onto ceramic blank is more than 2 times that of comb AMPS-modified polyacrylic acid superplasticizer. The pseudo-second order kinetic equation was found to best-fit the test data as judged by the correlation coefficients.