Lecture 3 Flashcards Preview

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Flashcards in Lecture 3 Deck (14)
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1
Q

Anionic emulsifier uses

A

soaps, detergents

2
Q

Cationic emulsifier uses

A

amines, quaternary ammonium compounds

3
Q

Nonionic emulsifier uses

A

ethoxylates, polyglyceryl esters, acylglucosides

4
Q

Amphoteric emulsifier uses

A

betaines

5
Q

A surfactant becomes more hydrophobic when it has

A

Longer hydrocarbon tail, more tails, or a smaller nonionic headgroup

6
Q

A surfactant becomes more hydrophilic when it

A

is ionic, has more nonionic headgroup units, has a shorter tail

7
Q

HLB

A

A measure of how hydrophilic a surfactant is, 1 (most hydrophobic) - 20 (most hydrophilic)

8
Q

HLB of 1-3

A

defoamer

9
Q

HLB of 3-7

A

W/O emulsifier

10
Q

HLB of 7-9

A

wetting agent

11
Q

HLB of 8+

A

O/W emulsifier

12
Q

HLB of 12+

A

detergent, solubilizer

13
Q

What kind of surfactant was HLB designed for?

A

Nonionic

14
Q

HLB theory does not take into account…

A

Electrical double layer of ionics, temperature effects of nonionics, fatty alcohols, concentration of emulsifier, or phase volume.