Mixed monolayers of polydimethylsiloxane with cellulose acetate
Mixed monolayers of polydimethylsiloxane with cellulose acetate
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聚二甲基硅氧烷与醋酸纤维素的混合单层
DOI：
10.1016/0021-9797(80)90105-8
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发表时间：
1980
期刊：
影响因子：
--
通讯作者：
P. Baglioni
中科院分区：
文献类型：
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作者：
G. Gabrielli;P. Baglioni
先前的工作对水-空气界面处二维状态的大分子化合物的混合物进行了研究，发现不仅组分聚合物之间存在相容性，而且还存在混合自由能为负值的混合物，即具有高热力学稳定性的混合物(1)。另一方面，众所周知，二维薄膜不仅是生物膜的有用模型，而且也是离子或气体交换器的有用模型 (2)。正是出于这个原因，我们在目前的工作中选择了两种在透析膜领域广泛使用的聚合物（3），并且我们研究了它们的二维混合物，有两个目的：“首先，将二维聚合物混合物的研究扩展到与先前考虑的聚甲基丙烯酸类化合物非常不同的化合物，以获得有关相容性和相容性的一般原因的信息。 二维状态下不相容；其次，确定是否可以考虑具有优异透析性能（例如气体）的两种大分子化合物的混合物，至少在二维状态、均质（即真正混合）膜或异质，并因此以组分的相互不溶性为特征。这项研究是使用表面压力测量和椭圆测量技术进行的。
In previous works mixtures of macromolecular compounds in the bidimensional state at the water-air interface were studied, and there was found not only a compatibility between the component polymers, but also the existence of mixtures which show a negative value of the free energy of mixing, that is, mixtures characterized by a high thermodynamic stability (1). On the other hand, it is known that bidimensional films are useful models, not only of biological membranes, but also of ion or gas exchangers (2). It is for this reason that we have, in the present work, selected two polymers that are much used in the field of membranes employed in dialysis (3), and we have studied bidimensional mixtures of them, with two aims:'first, to extend the study of bidimensional polymeric mixtures to compounds that are very different from the polymethacrylic ones previously considered, to obtain information concerning the general reasons for compatibility and incompatibility in the bidimensional state; and second, to establish whether mixtures of two macromolecular compounds having excellent dialyzing properties (for example, of gases) could be considered, at least in the bidimensional state, homogeneous (that is, truly mixed) films, or heterogeneous, and therefore characterized by a reciprocal insolubility of the components. The study was carded out using both surface pressure measurements and the ellipsometric technique.