聚丙烯酰胺胶态分散凝胶微观形态研究

用光学显微镜和扫描电镜观测了聚丙烯酰胺／柠檬酸铝胶态分散凝胶在盖玻片上常温自然干燥后形成的聚集体微观结构，通过与相同浓度的聚丙烯酰胺水溶液和盐水溶液在相同条件下形成的聚集体微观结构的比较及胶态分散凝胶颗粒有效直径的测定，确认该胶态分散凝胶是由以分子内交联的为主生成的，彼此独立，相互连接较弱的凝胶小颗料组成的胶态分散体系。

MICROSTRCTURAL STUDIES OF POLYACRYLAMIDE COLLOIDAL DISPERSION GEL

The morphologies of the aggregates of HPAM/aluminum citrate colloidal dispersion gels formed on glass substrate after evaporation of the water are observed and investigated by using optical and scanning electronic microscopy. These aggregates are principally of dendrite type with distinguishable packing elements being gel particles. The gel particles are composed predominantly of intermolecularly crosslinked HPAM molecular coils as shown on SEM photographs. The dimension of the gel particles observed under SEM and determined instrumentally are practically the same. The morphological structures of the aggregates formed from HPAM slutions in salt and distilled waters are more complex and fine.