三辛基氧化膦辐解乳化性质的研究

A STUDY ON THE EMULSIFICATION PROPERTY OF THE γ RADIOLYSIS OF TOPO

为了探讨三烷基氧化膦 (TRPO)辐射乳化的原因及解决的办法 ,以三辛基氧化膦(TOPO)为TRPO的模型 ,对TOPO的γ辐解进行了研究。被辐照样品溶于环己烷后 ,用 5%的Na2 CO3和三蒸水萃取分离TOPO的辐解产物。在水萃过程中出现了乳化现象。乳化程度与体系的吸收剂量和 pH值有关 ,随吸收剂量的增大而增大。辐解产物的总G值随吸收剂量的增大而减小。同时 ,对乳化物的结构分析表明 ,引起乳化的物质可能主要为TOPO与次瞵酸及其酯组成的寡聚物。

Trioctyl phosphine oxide (TOPO) was used as the model of TRPO and its γ radiolysis was studied. The irradiated samples were dissolved in cyclohexane (CH), then extracted with 5% Na 2CO 3 and subsequently extracted with distilled water. Emulsification appeared in the process of water extraction. The extent of emulsification depended on the dose absorbed and pH of the system. It increased with the increasing of the dose absorbed, but the total G value decreased. The structures of radiolysis products were identified by IR spectra, UV spectra and element analysis. The results demonstrated that it was the oligomer of TOPO, phosphinic acid and its ester that induced emulsification.