【摘要】 本文对天然海泡石的酸改性历程和酸改性海泡石的结构进行了探讨。结果表明,海泡石的酸脱镁历程就单位晶胞而言,是从八面体层边缘位置开始逐渐向中间位置深入;就整个纤维体而言,是部分滑石片段单元完全脱镁,引起晶内通道连通并向中孔发展。不完全脱镁产物具有宏观上不均一的结构,完全脱镁产物保持了未脱水缩合的结构状态。更多还原

【Abstract】 The acid modification mechanism of nature sepiolite and the structure of acid modified sepiolite have been investigated. The results show that the removal of Mg²⁺ from sepiolite starts from the border of a unit cell talc ribbon-type structure then develops to the central position of the layer. As for fiber-like sepiolite particles,in which talc ribbon units are incompletely formed, Mg²⁺ dissociate completely with mesopores formed during acid modification. Products with Mg²⁺ partially removed has a non-uniform structure, while those with Mg²⁺ completely removed, the condensation of Si-OH groups is inhabited.更多还原