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通过电导法、荧光法、粒度法等方法研究了羧甲基淀粉与3种不同碳数烷基二甲基苄基氯化铵之间的相互作用。结果表明,羧甲基淀粉与长链烷基二甲基苄基氯化铵在小于单纯表面活性剂临界胶束浓度(cmc)1～2个数量级的浓度下发生复合,并产生沉淀。当表面活性剂烷基链增加且浓度增大时,表面活性剂长碳链间的疏水作用及与羧甲基淀粉间的疏水作用,导致羧甲基淀粉-表面活性剂复合物溶解。结合电导率与透光率数据,可以认为盐浓度的增加可以促进表面活性剂单体胶束的形成与聚集体的加强,从而强化了羧甲基淀粉与长链烷基二甲基苄基氯化铵的相互作用。
The interaction between carboxymethyl starch and three different alkyldimethylbenzyl ammonium chlorides was studied by the methods of conductivity, fluorescence and particle size. The results showed that carboxymethyl starch and long chain alkyl dimethyl benzyl ammonium chloride complexed at a concentration less than one to two orders of magnitude of the critical surfactant concentration (cmc) and precipitated. When the surfactant alkyl chain increases and the concentration increases, the hydrophobic interaction between the long carbon chains of the surfactant and the hydrophobic interaction with the carboxymethyl starch results in the dissolution of the carboxymethyl starch-surfactant complex. Combining conductivity and transmittance data, it is believed that an increase in salt concentration may promote the formation of the surfactant micelles and the strengthening of the aggregates, thereby strengthening the interaction between the carboxymethyl starch and the long chain alkyl dimethyl benzyl chloride Ammonium Ammonium Interactions.