聚酰胺―胺的合成表征及对铝酸钠溶液物化性质的影响

用发散法合成以乙二胺为核的聚酰胺―胺(PAMAM 0.5～6.0代),采用元素分析、电位滴定等方法对合成产物进行表征分析,考察了不同分子代数、不同浓度的PAMAM对铝酸钠溶液表面张力和电导率等物理化学性质的影响。结果表明,该条件下合成的PAMAM具有较好的结构完整性。此外随着添加剂PAMAM的增加,铝酸钠溶液的表面张力急剧降低,半代数的PAMAM具有较好的表面活性,有望成为新一代的表面活性剂;整代数的PAMAM也有一定的表面活性。PAMAM属于非离子型表面活性剂,因此随着PAMAM的加入,铝酸钠溶液的电导率改变不大。

Studies on the Synthesis and Characteristics of PAMAM Dendrimers and the Physicochemical Properties of Sodium Aluminate Solution

In this paper, a series of polyamidoamine （PAMAM dendrimers of 0.5-6.0 generation） were synthesized by divergent method using ethylenediamine as a raw material, Their structure were characterized by means of elemental analysis and potentiometrie titration. With the respective experiments of different generation and at the different additions, the surface tension and electric conductivity of the sodium aluminate solution were especially examine. It has shown that the architecture of PAMAM dendrimers was much more perfect at that condition, and with the increasing of the dosage of PAMAM, surface tension of sodium aluminate solution sharp reduce, It is found that the half generation PAMAM dendrimers, which are expected to be a kind of novel Surfaeant, have fine surface activity. The integrated generation PAMAM dendrimers also have some surface activity. PAMAM is a non-ionic surfactant, with the additive of PAMAM, the electric conductivity of sodium aluminate solution change very small.