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surfactant
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  表面活性剂
    The Process Fundamentals of Surfactant Assisted Protein Refolding
    表面活性剂辅助蛋白质复性过程机理研究
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    Applications of High Resolution Liquid State NMR Spectroscopy in Surfactant Chemistry and Neurochemistry
    液体高分辨核磁共振波谱在表面活性剂化学和神经化学研究中的应用
短句来源
    Spectrophotometric Determination of Mercury with PAN in the Presence of Non—ionic Surfactant
    表面活性剂和PAN用于分光光度法测定微量汞
短句来源
    The study of 5-Cl-PADMA as a spectrophotometric reagent in the presence of anionic surfactant
    在阴离子表面活性剂存在下对5-Cl-PADMA作为光度显色试剂的研究
短句来源
    THE SENSITIZATION OF SURFACTANT ON THE FLUORESCENT REACTIONS OF LANTHANUM, YTTRIUM WITH OXINE-5-SULFONIC ACID
    表面活性剂对镧、钇-8-羟基喹啉-5-磺酸萤光反应的敏化作用
短句来源
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  表面活性物质
    The Adsorption Behavior of the Mixture of Surfactant and Carrier at the interfaces of (W/O)/W Liquid Surfactant Membrane System
    (W/O)/W液膜体系中混和表面活性物质在界面的吸附特性
短句来源
    Computer Data Processing in the Interaction Parameters of Surfactant
    表面活性物质作用参数的计算机数据处理
短句来源
    The results indicated that the properties of tautomerism of DBM could be applied to characterize the microenvironment al property of organized media, reveal the structural characteristics of micelle, and determine the critical micelle concentration of surfactant.
    结果表明,用二苯甲酰甲烷的酮醇互变异构性质能够表征有序介质的微环境性质,确定表面活性物质的临界胶束浓度.
短句来源
    The color change pH values of MO in the xerogel doped with CTAB s hift to low pH values, and are lower than those of MO in the other surfactant do ped xerogels. The xerogel doped with SDS shows the highest leaching rate of MO.
    CTAB掺杂的凝胶中甲基橙的变色点的 pH值明显移向低 pH值 ,低于无表面活性物质及SDS和SA调制凝胶变色点的pH值 ,而这些凝胶的变色点pH值接近。
短句来源
  活性剂
    The Process Fundamentals of Surfactant Assisted Protein Refolding
    表面活性剂辅助蛋白质复性过程机理研究
短句来源
    Applications of High Resolution Liquid State NMR Spectroscopy in Surfactant Chemistry and Neurochemistry
    液体高分辨核磁共振波谱在表面活性剂化学和神经化学研究中的应用
短句来源
    Spectrophotometric Determination of Mercury with PAN in the Presence of Non—ionic Surfactant
    表面活性剂和PAN用于分光光度法测定微量汞
短句来源
    The study of 5-Cl-PADMA as a spectrophotometric reagent in the presence of anionic surfactant
    在阴离子表面活性剂存在下对5-Cl-PADMA作为光度显色试剂的研究
短句来源
    THE SENSITIZATION OF SURFACTANT ON THE FLUORESCENT REACTIONS OF LANTHANUM, YTTRIUM WITH OXINE-5-SULFONIC ACID
    表面活性剂对镧、钇-8-羟基喹啉-5-磺酸萤光反应的敏化作用
短句来源
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  “surfactant”译为未确定词的双语例句
    Enzyme Immobilized Microreactors and Surfactant Suppressed Matrix for Peptide Mapping and Low Mass Molecules Analysis with MALDI TOF-MS
    固定化酶微反应器和混合基体应用于MALDI TOF-MS的肽谱分析和小分子分析
短句来源
    Spectrophotometric Determination of Rare Earth Elements By means of 5-Br-PADAP and Nonionic Surfactant
    用5-Br-PADAP和非离子表面活性剂分光光度测定微量稀土
短句来源
    Study on synergic hyperchromic effect in aqueous solutions of anionic-nonionic surfactant mixtures——Ag~+—5-C1-PADAB system
    阴离子和非离子表面活性剂混合液中协同增色作用的研究——Ag~+—5-Cl-PADAB体系
短句来源
    Studies on the Colour Reaction of Multicomponent Complexes ⅩⅩⅤ.Non-ion Surfactant Spectrophotometric Determination of Microamount Cadmium
    多元络合物显色反应的研究(ⅩⅩⅤ)非离子表面活性剂吐温-80-达旦黄分光光度法测定微量镉
短句来源
    Study on colorimetric reaction of polycomponent complex of scandium in the presence of anionic surfactant, sodium lauryl sulphate
    十二烷基硫酸钠存在下钪多元络合物显色反应的研究
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  surfactant
The optimal constituents of microemulsion were found from pseudoternary phase diagrams: the mass ratio of Span80 to PS was 4:1 and complex surfactant to cosurfactant was 1:1.
      
Synthesis and surface-active property of bis-quaternary ammonium-sodium sulfate Gemini surfactant
      
N,N-dimethyldodecylamine, hydrochloride and epichlorohydrin (molar ration is 2:1:1) were used to synthesize bis-quaternary ammonium Gemini surfactant with a hydroxyl in its spacer group by the one-pot method.
      
This hydroxyl was sulfonated by chlorosulfonic acid and then neutralized to bis-quaternary ammonium-sodium sulfate zwitterionic Gemini surfactant.
      
The critical micelle concentration (cmc) and surface tension of the novel zwitterionic Gemini surfactant in aqueous solution at 15°C are 7.2×10-5 mol/L and 34.5 mN/m, respectively.
      
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Although the surface adsorption of ionic surfactants had been widely studied, the investigations were almost limited to solutions containing only a single surfactant. In the present investigation surface tension of the mixed solutions containing a cationic and an anionic surfactant namely, dodecylpyridinium bromide and sodium dodecylsulfate, has been measured by the drop-volume method, and the individual adsorption of each surface-active ion calculated by the following equations:

本工作研究澳化十二烷基呲啶(C_(12)NBr)和硫酸十二烷基钠(NaC_(12)S)两种正、负离子表面活性剂的混合溶液(加入溴化钠作成等离子强度溶液)的表面吸附。用滴体积法测定C_(12)NBr水溶液、等离子强度的、不同C_(12)Br-NaC_(12)S比例的水溶液及1:1当量C_(12)NBr-NaC_(12)S混合溶液的表面张力。利用等离子强度条件下的Gibbs吸附公式 -((dγ/dln m_N))_m_S=RTГ′_N及- -((dγ/dln m_N))_m_N=RTГ′_S,可分剧求出正、负表面活性离子的吸附量。结果表明: 1.负离子表面活性剂之存在大为增加正离子表面活性剂的表面活性;反之亦然。1:1当量C_(12)NBr-NaC_(12)S混合溶液的CMC约为2×10~(-5)m,比C_(12)NBr溶液的CMC约小650倍。 2.负离子表面活性剂之存在促进正表面活性离子的表面吸附;反之亦然。这恰好与负、负表面活性离子混合溶液及丁醇-负表面活性离子混合溶液之情形相反。 3.加无机盐(NaBr)对1:1当量C_(12)NBr-NaC_(12)S混合溶液的表面张力几无影响,亦即对吸附无显著影响。由...

本工作研究澳化十二烷基呲啶(C_(12)NBr)和硫酸十二烷基钠(NaC_(12)S)两种正、负离子表面活性剂的混合溶液(加入溴化钠作成等离子强度溶液)的表面吸附。用滴体积法测定C_(12)NBr水溶液、等离子强度的、不同C_(12)Br-NaC_(12)S比例的水溶液及1:1当量C_(12)NBr-NaC_(12)S混合溶液的表面张力。利用等离子强度条件下的Gibbs吸附公式 -((dγ/dln m_N))_m_S=RTГ′_N及- -((dγ/dln m_N))_m_N=RTГ′_S,可分剧求出正、负表面活性离子的吸附量。结果表明: 1.负离子表面活性剂之存在大为增加正离子表面活性剂的表面活性;反之亦然。1:1当量C_(12)NBr-NaC_(12)S混合溶液的CMC约为2×10~(-5)m,比C_(12)NBr溶液的CMC约小650倍。 2.负离子表面活性剂之存在促进正表面活性离子的表面吸附;反之亦然。这恰好与负、负表面活性离子混合溶液及丁醇-负表面活性离子混合溶液之情形相反。 3.加无机盐(NaBr)对1:1当量C_(12)NBr-NaC_(12)S混合溶液的表面张力几无影响,亦即对吸附无显著影响。由此提出,对于无盐时的1:1C_(12)NBr-NaC_(12)S混合溶液,Gibbs吸附公式应为 -dγ/RT=(Г′_N+Г′_S)dlnm_N(或s) 4.1:1 当量混合溶液表面吸附的最小分子面积为16(?)~2(加NaBr)及15(?)~2(未加 NaBr)。因此可能有多分子吸附层的形成。此外,自实验结果的解析提出1:1当量混合溶液的表面无双电层;而正、负表面活性剂的高表面活性及高吸附量的产生,是由于长链间的van der Waals引力及正、负离子的静电引力的作用。

Kinetics of the elimination reaction of 1, 1, 2, 3-tetrachloropropane had been studied in emulsion system. It was found that the reaction was second order, the major product resulting from the elimination reaction of 1, 1, 2, 3-tetrachloropropane was 1, 1, 3-trichloropropene-2, the minor products were cis- and trans-1, 2, 3-trichloropropone.A number of characteristics inherent in the interfacial reactions were revealed experimentally, i. e: (a) The rate constant of emulsion elimination was plotted against the...

Kinetics of the elimination reaction of 1, 1, 2, 3-tetrachloropropane had been studied in emulsion system. It was found that the reaction was second order, the major product resulting from the elimination reaction of 1, 1, 2, 3-tetrachloropropane was 1, 1, 3-trichloropropene-2, the minor products were cis- and trans-1, 2, 3-trichloropropone.A number of characteristics inherent in the interfacial reactions were revealed experimentally, i. e: (a) The rate constant of emulsion elimination was plotted against the surfactant concentration and the experimental points were shown to fit a broken line on which there was a point of intersection at certain critical concentration of the surfactant; (b) The activation energy of the reaction increased linearly with the increase of the surfactant concentration, after passing through its maximum value, then decreased rapidly and approached a limit value; (c) The apparent rate constant k_(td) remained almost constant even if the ratio of dispersed phase to disperse medium was varied; (d) The logarithm of rate constant was inversely proportional to the logarithm of ion concentrations in aqueous phase.

研究了1,1,2,3-四氯丙烷的乳液消除反应动力学。此反应是二级反应,主要产物是1,1,3-三氯丙烯-2,并有少量顺式及反式-1,2,3-三氯丙烯。从实验发现一系列独特的界面反应特征:(a)乳液消除反应速度常数-表面活性剂浓度图的实验点符合折线关系,折线交点落在某一临界表面活性剂浓度上;(b)表观活化能随表面活性剂浓度的增高而先呈线性增大,达极大值后又急剧下降,最后趋近极限值;(c)表观速度常数K_(td)几乎不随分散相对分散介质体积的分数变化而改变;(d)反应速度常数的对数随水相离子浓度对数的增大而下降。

In this investigation, the surface-chemical properties of the mixed aqueous solutions of n-octyltrimethylammonium bromide (C_8 NMe_3Br) and sodium n-octylsulfate (C_8 SNa) have been studied. Some peculiar properties have been observed: (1) there is a very high surface activity of the mixed surfactants. The cmc of 1:1 (molar ratio) mixture is 7.5×10~(-3) m(cmc of C_8NMe_3Br: 2.6×10~(-1) m). The surface and interfaeial tension of 1:1 mixture are very low—down to ~23 and ~0.2 dyne/cm, whereas those of the single...

In this investigation, the surface-chemical properties of the mixed aqueous solutions of n-octyltrimethylammonium bromide (C_8 NMe_3Br) and sodium n-octylsulfate (C_8 SNa) have been studied. Some peculiar properties have been observed: (1) there is a very high surface activity of the mixed surfactants. The cmc of 1:1 (molar ratio) mixture is 7.5×10~(-3) m(cmc of C_8NMe_3Br: 2.6×10~(-1) m). The surface and interfaeial tension of 1:1 mixture are very low—down to ~23 and ~0.2 dyne/cm, whereas those of the single ionic surfactant solution (at cmc or above) are ~40 and ~10 dyne/em, respectively; (2) the bubble-life and the drop-life of 1:1 mixture are both much longer than those of the single surfactant solution; (3) the 1:1 mixture has a much better wetting power on paraffin wax than a single ionic surfactant solution; (4) the total surface and interracial adsorptions of the non-1:1 mixture are nearly equal to those of the 1:1 mixture, in most cases the surface and interfacial tensions are very low, and the surface mole-ratio of C_8NMe_3~+ to C_8S~- approaches 1:1; and (5) there is no obvious effect upon the surface and interfacial adsorptions and cmc by adding an inorganic salt (NaBr) to the solution of the mixed surfactants. The Gibbs equation should be written as:-dγ=RTΓ_(Total)d In mC_5NMe_3~+(or C_8S-) rather than the 2RT form as applied in the case of an ionic surfactant. From this equation the minimum average "molecular" area of the surface film of 1:1 mixture has been calculated to be 27~29 ~2, which is much smaller than that of a single ionic surfactant (in general, >40~2), indicating a closer packing of the surfactant ions on the surface.The above mentioned characteristics show that there are strong interactions between cationic and anionic surfactants in the mixed solution. The nature of these interactions is essentially due to the Columbic attractions between the positive and negative charges of the surfactant ions in addition to the hydrophobic interactions between hydrocarbon chains.

本工作研究了碳氢链较短的溴化辛基三甲铵(简写为C_8NMe_3Br)及辛基硫酸钠(简写为C_8SNa)混合水溶液的一些表面化学性质:在表面及“油-水”界面上的混合吸附、在表面上的气泡寿命和在界面上的液滴寿命以及溶液在石蜡表面上的润湿性能。从这些性质了解正、负离子表面活性剂的相互作用。结果表明:(1)混合表面活性剂有很高的表面活性。1:1C_8NMe_3Br-C_8SNa混合物的临界胶团浓度(cmc)为~7.5×10~(-3)m,远小于单一表面活性剂。在此浓度时,表面张力低达~23达因/厘米;溶液-正庚烷的界面张力更低,达~0.2达因/厘米,亦远低于单一表面活性剂;(2)混合表面活性剂溶液有很高的气泡寿命及液滴寿命,亦即有较大的表面膜及界面膜强度;(3)混合溶液比单一表面活性剂的润湿性能好;(4)不同比例的C_8NMe_3Br-C_8SNa混合溶液的表(界)面总吸附量与1:1混合溶液的相近,当浓度较大时,吸附层中两者比例大多接近1:1,且表(界)面张力亦甚低:(5)与一般离子型表面活性剂的情形完全不同,无机盐对1:1混合溶液的表(界)面张力影响很小。计算吸附量时,Gibbs公式应取1RT形式,而不采用对一般离子...

本工作研究了碳氢链较短的溴化辛基三甲铵(简写为C_8NMe_3Br)及辛基硫酸钠(简写为C_8SNa)混合水溶液的一些表面化学性质:在表面及“油-水”界面上的混合吸附、在表面上的气泡寿命和在界面上的液滴寿命以及溶液在石蜡表面上的润湿性能。从这些性质了解正、负离子表面活性剂的相互作用。结果表明:(1)混合表面活性剂有很高的表面活性。1:1C_8NMe_3Br-C_8SNa混合物的临界胶团浓度(cmc)为~7.5×10~(-3)m,远小于单一表面活性剂。在此浓度时,表面张力低达~23达因/厘米;溶液-正庚烷的界面张力更低,达~0.2达因/厘米,亦远低于单一表面活性剂;(2)混合表面活性剂溶液有很高的气泡寿命及液滴寿命,亦即有较大的表面膜及界面膜强度;(3)混合溶液比单一表面活性剂的润湿性能好;(4)不同比例的C_8NMe_3Br-C_8SNa混合溶液的表(界)面总吸附量与1:1混合溶液的相近,当浓度较大时,吸附层中两者比例大多接近1:1,且表(界)面张力亦甚低:(5)与一般离子型表面活性剂的情形完全不同,无机盐对1:1混合溶液的表(界)面张力影响很小。计算吸附量时,Gibbs公式应取1RT形式,而不采用对一般离子型表面活性剂适用的2RT形式。由此得出的最小平均“分子”面积为27~29(?)2,表明吸附层中表面活性离子排列紧密,膜凝聚性强。上述结果充分说明正、负离子表面活性剂在水溶液中有强烈的相互作用,其本质主要在于附加的正、负电荷的库仑引力,由此导致正、负离子表面活性剂混合溶液的一系列表面化学特性。

 
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