The results showed that the structure of poly-HEMA hydrogel was even while the structure of the copolymer hydrogel of NVP and HEMA was uneven in micron in full swollen state;

• 采用环境扫描电子显微镜(ESEM)研究各单体对水凝胶结构的影响,结果表明,在溶胀状态下,HEMA的均聚物水凝胶结构均匀,而HEMA与NVP共聚物水凝胶在微米层次上出现含水量不均;