Carboxymethyl chitosan is a kind of chitosan derivatives with good water solubility and good properties after carboxymethylation modification. At present, it has been used in the daily chemical industry such as hair care, skin care and medicine. Many applications of carboxymethyl chitosan need to coexist with surfactants. The interaction of the two will have a direct impact on the actual performance of the product.
Four typical types of commonly used surfactants were studied, namely, anionic surfactant sodium dodecyl sulfate SDS, cationic surfactant cetyltrimethyl ammonium bromide CTAB, cetylpyridinium bromide C16PyBr, nonionic surfactant polyoxyethylene ether Stability of TritonX-100 and amphoteric surfactants, dodecyl betaine C12BE, in combination with carboxymethyl chitosan solutions and their effects on their properties such as surface activity and viscosity.
The results show that carboxymethyl chitosan has good stability when mixed with anionic surfactant SDS, non-ionic surfactant TritonX-100 and amphoteric surfactant C12 BE, while when mixed with cationic surfactant CTAB and C16PyBr, precipitation will be produced in a certain concentration region. Carboxymethyl chitosan can increase the surface activity of SDS, while SDS can decrease the specific concentrated viscosity of carboxymethyl chitosan. CTAB can form a complex with carboxymethyl chitosan, so that the surface tension curve can produce two turning points, even in the precipitation area still has good surface activity, but the specific concentration viscosity of solution is greatly decreased. The interaction of Trito nX-100 and C12 BE with carboxymethyl chitosan was not obvious.
From Sui Weiping "The Interaction between carboxymethyl Chitosan and surfactant"
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