2C&2D, showed the presence of carboxylic groups
on MWCNTs Graphene surfaces which confirms the drug, Ibuprofen[Carboxylic group
The enhanced colloidal stability and freeze-thaw stability result from the presence of carboxylic groups
on the outer surface of the latex particles, providing both steric and electro- static stabilizations.
Values of pH, carboxylic groups
, and BET surface area PI, Pine; EU, eucalyptus; L, S, diluted and undiluted tannery waste; Ctr, control Carboxylic BET Samples pH groups ([m.
Similar experiments have been carried out with a solventborne PUA coating with the same chemical structure, but without the carboxylic groups
w] value of the obtained copolymer sample, for similar urea contents, as urea molecules can also provoke chain crosslinking through a reaction with the carboxylic groups
of the acrylic acid monomer.
I, different numbers of carboxylic groups
were added on MWCNTs by refluxing in 68% HNO3 (Merck) for 1-9 h (denoted as "n-CNT", where n is the time of acid treatment).
After irradiation, few peaks were observed including hydroxyl and carboxylic groups
characteristic of carboxylic acids which are formed during degradation.
25 mmol of deprotonated carboxylic groups
per gram of sample, respectively .
In the presence of heat and catalyst two carboxylic groups
form a fivemembered anhydride ring and release one molecule of water.
PBMAD was selected as the bioadhesive coating because it has a large number of carboxylic groups
exposed on each side group and it exhibits pH-dependent solubility; the polymer is stable at a low pH, but dissolves at a pH > 8.
Alginates--low-cost materials that are already used in foods, pharmaceutical products, paper, and other applications--are attractive because of their uniformly distributed carboxylic groups
This indicates that only one of the two carboxylic groups
is bonded to the metal.