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用平衡渗析法研究了有机高分子絮凝剂PAN-DCD与甲基橙(MO)在20,25,30,35℃下相互作用的热力学,求得结合常数K和热力学参数西△G,△H,△S,在对不同絮凝剂结构进行表征的基础上,探讨了不同PAN,DCD配比对合成的絮凝剂与MO相互作用的影响.结果表明:PAN-DCD与MO的相互作用中能量作用是主要的;随PAN与DCD的比值增大,合成的絮凝剂PD_1,PD_2,PD_3在常温下与MO的结合程度依次减小,但在较高温度下,三种絮凝剂与MO的结合程度顺序与常温相反,为PD_3>PD_2>PD_1,故PAN-DCD的结构与其同MO的结合程度之间存在着温度依赖性.
The thermodynamics of the interaction between the organic polymer flocculant PAN-DCD and methyl orange (MO) at 20, 25, 30 and 35 ℃ were studied by equilibrium dialysis. The binding constants K and thermodynamic parameters West △ G, △ H , △ S, on the basis of the characterization of different flocculant structure, the effects of different PAN and DCD ratio on the interaction between the synthesized flocculant and MO were discussed.The results show that: the energy interaction between PAN-DCD and MO Is the main. With the increase of the ratio of PAN to DCD, the binding capacity of the synthesized flocculants PD_1, PD_2 and PD_3 to MO gradually decreases at ambient temperature, but at higher temperatures, the binding degree of the three flocculants to MO In the opposite order to that at room temperature, PD_3> PD_2> PD_1, there is a temperature dependence between the structure of PAN-DCD and the extent of its binding to MO.