表面活性剂

Zwitterionic surfactant not only has properties of conventional surfactants, but also has many unique properties, for example, the low toxicity and stimulating to the skin and the eyes, good biologic degradation, basically no social effects of pollution, in addition it is able to bear the hard water and the high concentration electrolyte.

两性表面活性剂不仅具有阴、阳离子表面活性剂的性能，而且具有许多独特之处，例如，低毒性和对皮肤及眼睛的低刺激性，良好的生物降解性，基本上无公害和污染，而且具有耐硬水及高浓度电解质性能。

General meanings, feather and behavior of surfactant, Chemical structure, characteristic and synthesis of anionic, cationic, non-ionic and zwitterionic surfactants, Extraordinary properties and their correlative effecting factors.

阳离子、非离子和两性离子表面活性剂的化学结构、特点和合成方法；同时对表面活性剂的性质及相关因素作一大致的阐述。

Aqueous film-forming foam concentrates ( also called light water foam concentrates ) is made up of hydrocarbon surface active agent, fluocarbon surface active agent, auxiliary agent, stabilizing agent, antifreeze agent, etc.

水成膜泡沫灭火剂由碳氢表面活性剂、氟碳表面活性剂、助剂、稳定剂、抗冻剂等组成。

The results demonstrate that LAS can be biodegraded by microorganisms in the water and that the percentage of degradation of LAS was more than 95 % after 26 d.

表面活性剂在造福人类的同时，也带来了一系列的环境问题，我国环境标准中将表面活性剂列为第二类污染物质。

Compared with chemical surfactant, biosurfactant has a low toxicity to ecological system of Earth and can be biodegraded by microorganism.

相对于化学合成的表面活性剂，生物表面活性剂对生态系统的毒性较低，且可生物降解。

Chelating surfactants is a type of functional surfactants.

螯合性表面活性剂是一种新型的功能型表面活性剂。

The suitable oil phase, surfactant and cosurfactant were choused, the nanoemulsion drug delivery system of berberine were optimized by studying the pseudoternary phase diagram.

选择适宜的油相、表面活性剂和助表面活性剂，利用伪三元相图，制备出黄连素纳米乳给药系统。

The formulation in the study for the first time combined four types of additives including ionic surfactant,non-ionic emulsifier (Pluronic F-68 and Tween-80),and lecithin to obtain favorably stable nanosuspension,which could stabilize for more than six months without creaming.

4种表面活性剂的复配[两种非离子乳化剂(Pluronic F-68和Tween 80)，离子型表面活性剂以及卵磷脂]可以制备稳定6个月而不分层的纳米混悬液。

To study the relationship between the "tail" structure and the characteristics of Gemini surfactants, a new gemini surfactant CH(subscript 2s)-αω-Bis (dehydroabietyihydroxypropyltetramethylethyldiammonium Chloride) here s=2, has been synthesized. Dehydrogenated rosin as hydrophobic "tails" in the structure. The affections of reacttants ratio, reaction temperature and time on the yield of aimed compound have been discussed.

研究了Gemini表面活性剂中疏水&尾巴&结构对性质的影响，以脱氢松香酸和环氧氯丙烷为原料合成了中间体3-脱氢松香酰氧－2-羟丙基氯，再与四甲基乙二胺反应，得到1种以脱氢松香酰基为疏水链&尾巴&的对称Gemini型双季铵盐阳离子表面活性剂：二氯化－N，N'-二（3-脱氢松香酰氧－2-羟丙基）四甲基乙二胺。

To study the relationship between the hydrophobic "tail" structure and thecharacterizations of Gemini surfactants, a new gemini surfactant CsH2s-α,ω-bis(dehydroabietylhydroxypropylteteramethylethylammonium Chloride),here s=2, wassynthesized. Dehydrogenated rosin as hydrophobic "tails" in the structure. The impact factorsin the two steps are discussed.

为研究gemini表面活性剂中疏水&尾巴&结构对性质的影响，本论文以脱氢松香酸和环氧氯丙烷为原料合成了中间体3-脱氢松香酰氧-2-羟丙基氯，再与四甲基乙二胺反应，得到一种以脱氢松香酰基为疏水链&尾巴&的对称gemini型双季铵盐阳离子表面活性剂：二氯化-N，N′-二(3-脱氢松香酰氧-2-羟丙基)四甲基乙二胺。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。