A novel superabsorbent polymer materials for a diaper for aged adults

聚(丙烯酸)/聚4-乙烯基吡啶(PAA/PVPy)、聚(丙烯酸)/聚(4-乙基-N-乙基吡啶)(PAA/PVPyEtBR)、聚(苯乙烯磺酸)/聚(4-乙烯-N-乙基吡啶)(PSSH/PVPyEtBR)等聚电解质复合物的吸水过程不仅受扩散机制的控制，而且还受交联聚合物链的松弛机制控制。PSSH/PVPyEtBR络合物表现出不同于PAA/PVPy和PAA/PVPyEtBR络合物的吸附行为，在吸附水的溶解过程中起着重要的作用。生理盐溶液的吸水率与水的吸水率成正比。电荷密度和交联度影响吸附的水分子的吸附性和聚集性。

Polyelectrolyte complexes employed in the experiments are as follows: poly (acrylic acid)/poly(4-vinylpyridine) (PAA/PVPy), poly(acrylic acid)/poly (4-vinyl-N-ethylpyridinium bromide) (PAA/PVPyEtBr) and poly(styrenesulfonic acid)/poly (4-vinyl-N-ethylpyridinium bromide) (PSSH/PVPyEtBr).The complexes PAA/PVPy and PAA/PVPyEtBr showed that the sorption process of water in these complexes is controlled not only by diffusion mechanism but also by relaxation mechanism of cross-linked polymer chains. The PSSH/PVPyEtBr complex exhibited different sorption behavior compared with PAA/PVPy and PAA/PVPyEtBr complexes; in the sorption of water dissolution process plays an important part. The sorptivity for the physiological salt solution was directly proportional to that for water. The charge densities and the degrees of crosslinks affected sorptivities and clustering of water molecules sorbed.