疏水修飾的高分子與界面活性劑的系統在工業上有許多應用。因此，兩者之間的交互作用越來越受到重視。本實驗探討的系統是非離子型高分子 (疏水改質羥乙基纖維素) 與非離子型界面活性劑(Tergitol 15-S-7、LE207、Neodol 25-7 and Pannox 69C)間的交互作用。實驗分成兩部分，第一部分為羥乙基纖維素與過氧苯醯經由酯化反應做疏水性改質的高分子。第二部分為探討疏水改質羥乙基纖維素在加入非離子型界面活性劑之後，對黏度、活化能及螢光圖譜的影響，來了解兩者交互作用的行為。

Hydrophobically modified polymer and surfactants system have been applied in industry many years. So, interaction between hydrophobically modified polymer and surfactants has attracted growing attention. In this experiment, we study the interaction between nonionic polymer (hydrophobically modified hydroxyethyl cellulose) and nonionic surfactants (Tergitol 15-S-7、LE207、Neodol 25-7 and Pannox 69C). The first step in experiment is preparation of hydrophobically modified hydroxyethyl cellulose with benzoyl chloride. The second step in experiment is to discuss interaction between hydrophobically modified hydroxyethyl cellulose and nonionic surfactants and to compare results with literatures. Observing interaction with viscosity (η)、dissociation energy (Em) and fluorescence.

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