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通过在水介质中添加纳米CdSSe粒子,制备了CdSSe-H2O纳米流体,采用Zeta电位、吸光度并结合沉降照片研究了三种表面活性剂对CdSSe-H2O纳米流体的稳定性影响。结果表明:在0.01wt%CdSSe-H2O纳米流体中,对于三种表面活性剂聚乙二醇2000(PEG2000),十六烷基三甲基溴化铵(CTAB)和十二烷基苯磺酸钠(SDBS),当其浓度分别为0.06%、0.03%和0.05%时体系的分散稳定性最好。针对阴离子表面活性剂在带负电的CdSSe颗粒上的吸附本文提出了表面活性剂离子竞争吸附理论,很好的解释了SDBS对CdSSe-H2O纳米流体的稳定性影响过程。
The CdSSe-H2O nanofluids were prepared by adding CdSSe nanoparticles into aqueous media. The effects of the three surfactants on the stability of CdSSe-H2O nanofluids were investigated by Zeta potential, absorbance and sedimentation photos. The results showed that in 0.01wt% CdSSe-H2O nanofluid, the three surfactants, polyethylene glycol 2000 (PEG2000), cetyl trimethyl ammonium bromide (CTAB) and dodecyl benzene sulfonic acid Sodium (SDBS) had the best dispersion stability when its concentration was 0.06%, 0.03% and 0.05% respectively. Adsorption of Anionic Surfactants on Negatively Charged CdSSe Particles A surfactant ion competitive adsorption theory was proposed in this paper to explain the effect of SDBS on the stability of CdSSe-H2O nanofluids.