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研究了尺寸分别为50 nm和3μm的一水草酸钙(COM)和二水草酸钙(COD)晶体对不同电荷表面活性剂的吸附差异,包括阴离子型表面活性剂磺基琥珀酸钠二辛酯(AOT)、阳离子型表面活性剂十六烷基三甲基溴化铵(CTAB)和非离子型表面活性剂壬基酚聚氧乙烯醚(NP-40),探究了尿液中带不同电荷的分子对纳米、微米尿微晶的影响。结果表明,表面活性剂的吸附量大小为AOT>CTAB>NP-40,即阴离子型表面活性剂的吸附量最大,非离子型表面活性剂的吸附量最小;晶体尺寸相同时,COM的吸附能力稍大于COD;吸附表面活性剂后,晶体表面的ζ电位绝对值都增大,有利于抑制晶体的团聚和沉降。提出了晶体吸附不同表面活性剂的分子模型。不同电荷表面活性剂与纳/微米COM、COD晶体之间存在不同的相互作用。表面活性剂吸附量越大,沉降越慢,对晶体悬浮液的稳定效果越明显。
The differences in the adsorption of different charge surfactants on COM and DIMMs with sizes of 50 nm and 3 μm, respectively, including the anionic surfactant sodium dioctyl sulfosuccinate (AOT), cetyltrimethylammonium bromide (CTAB) and nonylphenol nonylphenol ethoxylate (NP-40) as cationic surfactants were investigated in urine with different charges Of molecules on the impact of nano-micron micelles. The results showed that the adsorption capacity of surfactant was AOT> CTAB> NP-40, that is, the adsorption capacity of anionic surfactant was the largest and the adsorption capacity of non-ionic surfactant was the smallest. When the crystal size was the same, the adsorption capacity of COM Slightly larger than COD; After the surfactant is adsorbed, the absolute value of the zeta potential of the crystal surface is increased, which is beneficial to inhibit the crystal agglomeration and sedimentation. A molecular model of crystal adsorption on different surfactants was proposed. Different charge surfactants and nano / micron COM, COD crystals exist between the different interactions. The larger the amount of surfactant adsorption, the slower the sedimentation, the more stable the effect of the crystal suspension.