摘要
用质子化的4-乙烯基吡啶-丙烯腈无规共聚物(P4VP+-r-AN)与偶氮苯染料酸性间胺黄(MY)在水溶液中通过静电力作用制备了一种新型的侧链偶氮复合物(P4VP-r-AN/MY).采用FTIR,UV-Vis,DSC,TEM和HRTEM-EDS研究了溶剂对P4VP-r-AN/MY聚集形态的影响,并初步探讨了P4VP-r-AN/MY聚集体的形成过程及转变机理.结果表明,P4VP-r-AN/MY在水溶液中聚集形成尺寸为10～250nm的球形聚集体;在DMF中,球形聚集体解聚,形成较为均匀的薄膜结构;而向P4VP-r-AN/MY的N,N-二甲基甲酰胺(DMF)中逐渐增加水的含量,P4VP-r-AN/MY又会重新聚集,当含水量达到质量分数为62.5%时,P4VP-r-AN/MY聚集形成尺寸为30～200nm的空心纳米球.溶剂的组成(水和DMF的质量比)对P4VP-r-AN/MY聚集体形态起着至关重要的作用.
A new strategy based on electrostatic interaction technology was provided for design of novel side chain azobenzene complex（P4VP-r-AN/MY） from the protonated P4VP-r-AN（P4VP ＋-r-AN） and azobenzene dye metanil yellow（MY） in aqueous solution.The self-assembly behavior and morphologies of P4VP-r-AN/MY were investigated by means of FTIR,DSC,UV-Vis,TEM and HRTEM-EDS.The possible formation and transformation progresses of P4VP-r-AN/MY aggregations were also preliminary discussed in this paper.The azobenzene complex was subjected to solvent-induced self-assembly in THF/water mix solvent to construct avariety of morphologies.The azobenzene complex P4VP-r-AN/MY could be self-assembled and aggregated in aqueous solution,and the aggregations shown to be solid polymeric nanospheres on the sizes of 10—250 nm in diameters.The spherical ordered structures of P4VP-r-AN/MY were destroyed in DMF solvent,and converted into film structure.However,in DMF/H2O mixed solvent with a H2O mass fraction of 62.5%,azobenzene chromophore containing polymeric hollow nanospheres on the sizes of 30—200 nm in diameters were directly observed by TEM.The results indicate that the composition of solvents（the mass ratio of H2O and DMF） plays an important role in controlling the shape of self-assembly morphologies.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第10期2067-2073,共7页
Chemical Journal of Chinese Universities
