Patent ID: 8492161
Filing Date: 2013-07-23
Classification: B82Y,G01N,Y10T

Abstract:
1. A method for quantitative analyzing a functional group on the surface of a solid material based on acid-base titration, wherein the method includes the steps of: introducing that includes carbon nano-tubes and carboxylic group into sodium hydrogen carbonate solution for reaction, thus turning the carboxylic group into sodium carboxylate and consuming the sodium ions of the solution; separating the carbon nano-tubes from the sodium hydrogen carbonate solution by centrifugal filtration; analyzing the change in the amount of the sodium ions in the sodium hydrogen carbonate solution before and after the reaction in the sodium hydrogen carbonate, wherein the amount of the sodium ions before the reaction minus the amount of the sodium ions after the reaction is the amount of the carboxylic group; introducing the separated carbon nano-tube that includes carbon nano-tube and sodium carboxylate into hydrochloric acid solution for reaction, thus turning the sodium carboxylate into the carboxylic group and dissolving the sodium ions in the hydrochloric acid solution; separating the carbon nano-tubes from the hydrochloric acid solution by centrifugal filtration; and analyzing the amount of sodium ions before and after the reaction in the hydrochloric acid solution, wherein the amount of the sodium ions after the reaction in the hydrochloric acid solution minus the amount of the sodium ions before the reaction in the hydrochloric acid solution is the amount of the carboxylic group for confirming the result of the foregoing analysis wherein the solid material is carbon nano-tubes, the functional group is the carboxylic group.