Andreopoulos A G
Laboratory of Special Chemical Technology, N.T.U. Athens, Greece.
Biomaterials. 1987 Sep;8(5):397-400. doi: 10.1016/0142-9612(87)90012-3.
The diffusive properties of alginate membranes prepared by the interfacial reaction of sodium alginate solution with gypsum substrates were studied. The penetrants of primary importance for the above study were methyl methacrylate (MMA) and water, since alginate membranes are used as mould release agents, during the casting of poly(methyl methacrylate) (PMMA) in gypsum moulds in a water bath. Vapour sorption measurements were carried out at various temperatures. The effect of temperature and the combined action of water and MMA on the swelling behaviour of the membrane was also investigated. The results indicate that the water sorption of alginate membranes is non-Fickian, in spite of the linearity of the curves obtained by plotting Mt/M infinity versus t 1/2, at least for a short time period. The membrane treatment with methyl methacrylate, leads to considerably lower equilibrium sorption, possibly because of the formation of a thin film of poly(methyl methacrylate) on the membrane surface.
研究了通过海藻酸钠溶液与石膏底物的界面反应制备的海藻酸盐膜的扩散特性。对于上述研究，最重要的渗透剂是甲基丙烯酸甲酯（MMA）和水，因为在水浴中在石膏模具中浇铸聚甲基丙烯酸甲酯（PMMA）时，海藻酸盐膜用作脱模剂。在不同温度下进行了蒸汽吸附测量。还研究了温度以及水和MMA的联合作用对膜溶胀行为的影响。结果表明，尽管通过绘制Mt/M∞对t1/2得到的曲线呈线性，但至少在短时间内，海藻酸盐膜的水吸附是非菲克型的。用甲基丙烯酸甲酯处理膜会导致平衡吸附量大幅降低，这可能是由于在膜表面形成了聚甲基丙烯酸甲酯薄膜。
