What tenside means?
1. A surface-active substance. 2. A substance composed of lipoprotein that is secreted by the alveolar cells of the lung and serves to maintain the stability of pulmonary tissue by reducing the surface tension of fluids that coat the lung.
What is non ionic surfactant?
Non-ionic surfactants are surfactants that have polar head groups that are not electrically charged (see Fig. 20.18). They usually rely on a functional group able to deprotonate but only to a very low degree.
What is tenside solution?
Substances that lower the surface tension of a liquid or a solution are called surfactants. If this phenomenon is particularly powerful, the surfactant is called a tenside. For example, soaps are tensides.
Which of the following is example of lipophilic surfactant?
Lipophilic surfactants possess low HLB values (1-10) and form W/O (water-in-oil) emulsions. Dish detergents, surfactants for emulsion polymerization, and the following example (SLS = Sodium Lauryl Sulfate) are high HLB surfactants.
What is the difference between ionic and nonionic surfactants?
The main difference between ionic and nonionic surfactants is that ionic surfactants are formulated with cations or anions, while non-ionic surfactants are formulated without cations or anions.
What is the example of non-ionic surfactants?
Examples of nonionic surfactant molecules are monoglyceride of long-chain fatty acids, polyoxyethylenated alkylphenol, and polyoxyethylenated alcohol (Rosen and Kunjappu, 2012).
Which of the following is a example of a hydrophilic surfactant?
Diacetyl tartaric acid esters of monoglyceride, polysorbates, lecithin are some of the examples of hydrophilic surfactants and can be used for the stabilization of O/W emulsions. Interestingly, one of the most commonly used surfactants, Sodium lauryl sulfate has an HLB value of 40.
What does anionic and nonionic mean?
The key difference between anionic cationic and nonionic surfactants is that anionic surfactants contain negatively charged functional groups, and cationic surfactants contain positively charged functional groups, whereas nonionic surfactants have no net electrical charge.
What are nonionic surfactants used for?
Nonionic surfactants are very good at emulsifying oils and are better than anionic surfactants at removing organic soils. The two are frequently used together to create dual-action, multi-purpose cleaners that can not only lift and suspend particulate soils, but also emulsify oily soils.
What are surfactants or tensides?
Surfactants or tensides are chemical species that act as wetting agents to lower the surface tension of a liquid and allow for increased spreadability. This can be at a liquid-liquid interface or a liquid- gas interface.
What does surfactant mean in medical terms?
The term surfactant is a blend of surface active agent. In the United States National Library of Medicine’s Medical Subject Headings (MeSH) vocabulary, surfactant is reserved for the meaning pulmonary surfactant. For the more general meaning, surface active agent/s is the heading.
Which word combines the terms surface active agent and surfactant?
Surfactant is the word that combines the terms “surface active agent”. Surfactants or tensides are chemical species that act as wetting agents to lower the surface tension of a liquid and allow for increased spreadability. This can be at a liquid-liquid interface or a liquid-gas interface.
How many tons of surfactants are there?
Other surfactants produced on a particularly large scale are linear alkylbenzene sulfonates (1.7 million tons/y), lignin sulfonates (600,000 tons/y), fatty alcohol ethoxylates (700,000 tons/y), and alkylphenol ethoxylates (500,000 tons/y).