Abstract
Based on the carboxymethyl reaction of the medical cotton gauze, the paper analyzed absorbency and strength of the carboxymethyl medical cotton gauze. According to different concentrations of sodium hydroxide, molar ratio of sodium hydroxide and chloroactic acid, and mass ratio of chloroactic acid and cotton gauze, we found the best conditions on the excellent absorbency and strength of the carboxymethyl medical cotton gauze. It`s shown that, when the concentration of sodium hydroxide is 20%, the molar ratio of sodium hydroxide and chloroactic acid is 2.7:1, and the mass ratio of chloroactic acid and cotton gauze is 1.5:1, the substitution degree of the carboxymethyl cotton gauze will be 0.2132, the water absorption will be 370.5%, the salt absorption will be 292.3% and the breaking force will be 181.8N. After the carboxymethyl reaction of proper condition, the cotton gauze possesses the excellent mechanical properties based on the good absorbency.
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