硅酸盐学报

将金属铝在氯化汞催化剂的作用下，溶解在甲酸和乙酸的混合水溶液中，制取羧酸铝溶液。此溶液在合适温度下，浓缩得到具有纤维成型能力的高粘度流体，然后利用干纺技术得到透明无色纤维。实验表明，当铝、甲酸、乙酸和水的摩尔比为１∶４∶３∶２４时，铝完全溶解得到无色透明且在室温下保持长期稳定的羧酸铝溶液。浓缩过程中，溶液内部发生了聚合反应，形成以—Ａｌ—Ｏ—Ｃ—联结为主的高分子。在高温下加热，纤维先驱体转化为氧化铝

Aluminium was dissolved in the mixture of aqueous formic acid and acetic acid in the presence of mercury chloride as a catalyst.It is found that dissolution of aluminium is a function of the ratio of aluminium,formic acid,acetic acid and water.Aluminium∶formic acid∶acetic acid∶water ratio,1∶4∶3∶24 by mole,is required to produce a clear,colorless solution.The solution is concentrated to obtain high viscosity,suitable for fiber formation by dry spinning.Polymerization takes place during concentration,giving a polymer with predominant —Al—O—C— linkage.The fiber can be pyrolysed into aluminium oxide at elevated temperature.