聚酰胺-胺型树枝状高分子水溶液的表面活性

树枝状化合物是一类三维的、高度有序的新型高分子.与传统高分子相比,这类化合物在合成时,可以在分子水平上严格控制,设计分子大小、形状、结构和功能基团,产物一般高度对称,单分散性好.因而具有广泛的潜在用途^[1,2].近年来,已引起广大化学工作者的重视.

Surface Activity of the PAMAM Dendrimer Aqueous Solutions

The generations of 0^5, 1^5, 2^5, 3^5, 4^5 of the PAMAM dendrimers and 1, 2, 3, 4 of the PAMAM dendrimers have been synthesized with an EDA core. Surface tensions of the dendrimer aqueous solution have been measured by drop|volume method. It is showed that (1) the dendrimer aqueous solutions have a surface activity and the order of the surface activity is %G=4^5>G=3^5>G=2^5>G=1^5>G=0^5; (2) %the plateau area of %G%=4^5 is more obvious than those of %G%=3^5 and %G%=2^5, the reason is not clear now; (3) as compared with %G%=0^5, 1^5, 2^5, 3^5, 4^5 of dendrimer, the cationic ones containing {_C-{12}H-{25}} had a higher surface activity.