水相中乙醇对胶体泡沫性质的影响

用不同比例的水-乙醇混合物作水相制备了胶体泡沫（CLA）,实验观察并测定了CLA的形态、粒径分布、半衰期、Zeta电位、水相溶液的粘度和水相/油相之间的界面张力等性质.结果表明，水相中加入乙醇会影响CLA的稳定性和粒径大小,但对CLA的Zeta电位影响不大.乙醇对CLA稳定性的影响主要是由于乙醇分子嵌入到界面膜中导致膜的强度变化以及水相粘度发生变化导致CLA粒子间隙的排液过程发生变化.     

Synthesis of the composite material of polyaniline/NiO/sodium dodecylbenzenesulfonate in micelles

The composite material of polyaniline/NiO/sodium dodecylbenzenesulfonate (SDBS) is synthesized in SDBS micelles. The composite material has satisfactory conductivity and thermostability, and the particle length, width, and thickness are about 200–500 m, 3–5 m, and 40–96 nm, respectively.     

流动注射荧光法同时测定苯酚和十二烷基苯磺酸钠

应用流动注射荧光法同时测定苯酚和十二烷基苯磺酸钠（ＳＤＢＳ），它们的激发光波长为λｅｘ＝２３０ｎｍ，发射光谱波长分别为３００ｎｍ，２９３ｎｍ，通过控制溶液ｐＨ值方法可以达到同时测定。该方法简便，快速应用于环境水样中苯酚和ＳＤＢＳ的测定，结果令人满意。     

CTAB与SDBS对碳酸锶粒子生长形态调控及机理研究

以表面活性剂CTAB和SDBS为化学添加剂,采用化学共沉淀法对碳酸锶晶体的生长形态进行调控,成功地制备出了实心的树枝状和花瓣为空心的花状碳酸锶粉体,并用X射线衍射(XRD)、扫描电子显微镜(SEM)和傅里叶变换红外光谱(FT-IR)等分析手段对样品进行了表征;最后重点对化学添加剂可能产生的影响机理进行了初步的探讨.结果表明,CTAB和SDBS在晶体生长的过程中能起到显著的影响作用,两者对粒子分散性能的作用效果相反,而且后者对晶体(013)和(213)晶面表面能降低的贡献明显大于前者.     

Optical properties of flower‐like CdS prepared by a hydrothermal method with SDBS as surfactant

In this article, flower‐like CdS structures have been prepared by a hydrothermal method with SDBS as surfactant. The influences of different experimental conditions on the morphologies, UV‐Vis and fluorescence properties of CdS have been investigated. The performances of CdS have been analyzed by X‐ray diffraction (XRD), field emission scanning electron microscopy (FESEM), ultraviolet‐visible (UV–Vis) and room‐temperature photoluminescence (PL). The XRD result indicates that the flower‐like CdS structures are of hexagonal phase. The FESEM results indicate that the main role of SDBS is to make the CdS crystals assemble together to form the flower‐like structures. The UV–Vis results show CdS has a strong absorption in the ultraviolet region and visible‐light region. The PL results show CdS has two emission peaks, respectively at 461 nm and 553 nm. The growth mechanism for the formation of flower‐like CdS structures is also described.     

烷基苯磺酸盐表面活性剂对水合硅酸钙形貌和结构的影响

利用十二烷基苯磺酸钠(SDBS)为模板剂, 研究了SDBS的浓度、 Ca ²⁺和Si {\mathrm{O}}_3^{2-} 离子的浓度、 是否搅拌和反应时间等条件对水合硅酸钙(CSH)形貌特征和分散性能的影响, 并提出了不同CSH球壳形貌特征的形成机理. 结果显示, 溶液中Na₂SiO₃·9H₂O浓度增大、 SDBS浓度增大及反应时间延长均会使CSH的结晶度变好, 聚合度增大, Q ²结构的相对含量增加, 其中Na₂SiO₃·9H₂O和SDBS浓度是主要控制因素. SDBS在溶液中形成的球形胶束具有极强的模板作用, 能有效改变CSH的结晶生长方式; 通过调节SDBS浓度和钙硅比例, 并适当延长CSH的生长时间, 能够获得球壳完整、 分散性好且稳定性强的CSH.     

SDBS对氧化铜纳米颗粒悬浮液粘度的影响

由氧化铜纳米颗粒、分散剂和水组成的悬浮液粘度是研究其流动与换热的重要基础数据。本文通过实验得出分散剂是影响纳米悬浮液粘度的决定性因素这一结论。研究表明,本文采用的纯分散剂溶液即十二烷基苯磺酸钠(SDBS)水溶液的粘度对温度变化很敏感,氧化铜纳米颗粒质量分数的增加对粘度的影响并不明显,而分散剂浓度对粘度的影响远远超过纳米颗粒质量分数对粘度的影响。     

钼酸盐复配绿色缓蚀剂的研究

用失重法研究了在自来水介质中,钼酸盐与硬脂酸钠(SS)和十二烷基苯磺酸钠(SDBS)对碳钢的缓蚀作用,讨论了产生协同效应的原因,分析了不同缓蚀配方的缓蚀效果,得到了较佳的复合配方。     

Determination of copper traces in water samples by flow injection-flame atomic absorption spectrometry using a novel solidified floating organic drop microextraction method

A simple, rapid and inexpensive solidified floating organic drop microextraction (SFODME) and flow injection flame atomic absorption spectrometric determination (FI-FAAS) method for copper were developed. 3-amino-7-dimethylamino-2-methylphenazine (Neutral red, NR) was used as the complexing agent. Several factors affecting the microextraction efficiency, such as, pH, NR and sodium dodecylbenzenesulfonate (SDBS) concentration, extraction time, stirring rate, and temperature were investigated and optimized. Under optimized experimental conditions an enrichment factor of 541 was obtained for 100 mL of sample solution. The calibration graph was linear in the range of 0.5–20.0 ng mL^{− 1} and the limit of detection (3 s) was 0.18 ng mL^{− 1}, the limit of quantification (10 s) was 0.58 ng mL^{− 1}. The relative standard deviation (RSD) for 10 replicate measurements of 10 ng mL^{− 1} copper was 2.7%. The developed method was successfully applied to the extraction and determination of copper in different certified reference materials (Estuarine water, Slew 3 and fortified water, TM 23.2) and real water samples and satisfactory results were obtained.     

高温下表面活性剂与钠离子钙离子的作用机理

在高温条件下研究了表面活性剂SDBS和NPSS–10与Na+和Ca2+的静电作用机理:(1)SDBS浓度大于临界胶束浓度(cmc)时Na+作用较弱,Na+与胶束中的阴离子头基形成了离子对,屏蔽了离子头基的静电排斥力,在一定程度上降低了表面活性剂离子头基的极性,活性剂分子排列更加紧密。(2)NPSS–10浓度大于cmc时与Na+的作用较强,水化的氧乙烯基高温下部分失水和Na+与胶束中的阴离子头基形成了离子对的共同作用促使表面活性剂的极性降低,抗盐性能增加。(3)在Ca2+浓度较低时,SDBS与钙离子没有相互作用,无沉淀产生,原因是生成的烷基磺酸钙盐有一定的溶解度;在Ca2+浓度较高时,SDBS与Ca2+有强相互作用,电极电位发生显著变化,产生烷基磺酸钙盐沉淀。(4)在低浓度Ca2+溶液中,NPSS–10与Ca2+有较强的作用,无沉淀产生,NPSS–10中的氧乙烯基团与Ca2+形成络合物。在高浓度Ca2+溶液中,NPSS–10与Ca2+没有作用,这是因为NPSS–10在高Ca2+溶液中的极性减弱,再加上空间效应,使得磺酸基头与Ca2+的相互作用减小,形成离子对的能力减弱,避免了Ca2+与磺酸基头的作用产生沉淀,从而使它具有很强的抗Ca2+能力。