科研之友
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摘要
The aim of this study was to compare the adsorption difference of cetyltrimethylammonium bromide (CTAB) on nano/micron calcium oxalate monohydrate (COM) and dihydrate (COD) crystals, so as to explore the stone formation mechanism. The crystal phase transformation before and after adsorption was analyzed by XRD and FT-IR. Adsorbed amount of nano/micron COM and COD to CTAB was detected by colorimetry. Zeta potentials of crystals were measured by Zeta potential analyzer. The adsorption curves of large-sized COM and COD (3 pm and 10 pm) formed a platform with increase of c (CTAB), while the small-sized COM and COD (50 nm, 100 nm and 1 um) showed linear-type. The adsorbed amounts of COM and COD crystals were reduced with increase of crystal size. Adsorbed amounts of CTAB on COM were more than COD with the same size, because CTAB is more likely to adsorb to the negative charges on the COM surface. In conclusion, adsorption of crystals is related to the specific surface area and crystal structure. The adsorption quantity, absolute values of zeta potential of crystals and electrostatic repulsive-force are increased with the decrease of crystal size because of the increased specific surface area and exposed oxalate ions. The adsorption could inhibit the aggregation of urine crystals thus reduce the risk of calcium oxalate stone formation.
- 出版日期2016-2
- 单位暨南大学
