Page 65 - Sarah Shafa F_e-Modul Koloid Berbasis PBL
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K e g i a t a n B e l a j a r 2
K e g i a t a n B e l a j a r 2
INVESTIGASI
Investigasi Mandiri : Ulasan Materi
KOLOID PELINDUNG
A g a r k o l o i d t e t a p s t a b i l , k i t a d a p a t m e n a m b a h k a n
s u a t u z a t b e r u p a k o l o i d d a l a m s i s t e m a g a r t i d a k
t e r k o a g u l a s i . K o l o i d t e r s e b u t d i k e n a l d e n g a n i s t i l a h
k o l o i d p e l i n d u n g . K o l o i d p e l i n d u n g j u g a d a p a t
d i t a m b a h k a n p a d a k o l o i d y a n g s i f a t n y a k u r a n g s t a b i l .
K o l o i d p e l i n d u n g s e r i n g
d i g u n a k a n p a d a s i s t e m
T e t e s a n
k o l o i d b e r u p a e m u l s i . E m u l s i
m i n y a k
d i d e f i n i s i k a n s e b a g a i
c a m p u r a n a n t a r a d u a m a c a m
c a i r a n y a n g t i d a k s a l i n g
c a m p u r ( i m m i s c i b l e ) , d i m a n a
E m u l s i m i n y a k d a n a i r
s a l a h s a t u c a i r a n t e r d i s p e r s i
Sumber:
d a l a m b e n t u k t e t e s a n
Essentials of Physical Chemistry
( d r o p l e t ) p a d a c a i r a n y a n g
l a i n ( T h a r w a t F . T a d r o s ) .
K o l o i d p e l i n d u n g y a n g b e r f u n g s i u n t u k m e n s t a b i l k a n
e m u l s i d i s e b u t e m u l g a t o r ( z a t p e n g e m u l s i ) . B e r k a t
a d a n y a e m u l g a t o r , m i n y a k d a n a i r d a p a t b e r c a m p u r .
C o n t o h b e b e r a p a p r o d u k i n d u s t r i y a n g m e n g g u n a k a n
e m u l g a t o r a d a l a h p r o d u k i n d u s t r i m a k a n a n d a n
m i n u m a n , s e p e r t i ; m a y o n e s , m a r g a r i n , d a n s u s u . I n d u s t r i
f a r m a s i , s e p e r t i ; m i n y a k i k a n d a n s a l e p . S e r t a i n d u s t r i
k o m e s t i k a , s e p e r t i k r i m w a j a h .
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