Surface studies on the ultrathin membrane prepared by spreading the polymer solution on a water surface
Surface studies on the ultrathin membrane prepared by spreading the polymer solution on a water surface
复制标题
将聚合物溶液铺展在水面制备的超薄膜的表面研究
DOI：
10.1016/0376-7388(92)80173-h
复制
发表时间：
1992
影响因子：
9.5
通讯作者：
Tsunetaka Matsumoto
中科院分区：
文献类型：
--
作者：
K. Nakamae;T. Miyata;Tsunetaka Matsumoto
通过将聚合物溶液铺展在水面上，制备了乙烯-乙烯醇共聚物（伊娃）和乙烯-乙烯醇-丙烯酸共聚物（EVA-AA）共混膜。聚合物的表面特征是通过电化学电位和ESCA测量。伊娃膜在两个表面即空气侧和水侧表面具有几乎相同的电位。ESCA测量的结果表明，伊娃膜在水侧表面比在空气侧表面具有更多的OH基团。由DMSO溶液制备的EVA-AA膜在水侧表面上具有比在空气侧表面上更高的电位。然而，来自DMAc溶液的EVA-AA膜在两个表面上具有相同的反电势。ESCA测量表明，来自DMSO溶液的EVA-AA膜在水侧表面上的−COOH基团的量是空气侧表面的两倍多。另一方面，在来自DMAc溶液的膜中，观察到两侧的COOH基团的量相同。
Ethylene-vinyl alcohol copolymer (EVA) and ethylene-vinyl alcohol-acrylic acid terpolymer (EVA-AA) ultrathin membranes were prepared by spreading the polymer solutions on a water surface. The surfaces of the polymers were characterized by ζ-potential and ESCA measurements. The EVA membrane has nearly the same ζ-potential at both surfaces, that is, the air side and the water side surface. The results of the ESCA measurements demonstrated that the EVA membrane had more OH groups at the water side surface than at the air side surface. The EVA-AA membrane from DMSO solution had a higher ζ-potential on the water side surface than on the air side surface. However, the EVA-AA membrane from DMAc solution had the same ζ-potential on both surfaces. The ESCA measurement showed that EVA-AA membrane from DMSO solution had more than twice the amount of −COOH groups on the water side surface compared with the air side surface. On the other hand, in the membrane from DMAc solution the amount of COOH groups was observed to be the same at both sides.