Synthesis of inorganic network structure using organic polymer gel (有機高分子ゲルを反応場とした無機ネットワーク構造体の作製)

研究了有机高分子水凝胶与无机胶体之间的共轭物的合成。无机胶体在凝胶的网状结构中生成。丙烯酸凝胶与水合氧化铈的共轭物虽然比表面积很小（2m^2/g），但对As（III）的吸附能力却很高（30mg/g）。水合氧化铈对As（III）的吸附容量为11mg/g，吸附剂的比表面积为50m^2/g。凝胶的网状结构由于凝胶的轻微膨胀使胶体在网状中产生高分散状态，从而产生高接触面积的胶体。在吸附砷的过程中，共轭物中未观察到胶体的溶解。以有机凝胶网络为反应场可制备高性能共轭吸附剂。以丙烯酸/聚乙烯醇凝胶和明胶凝胶为反应场，在水凝胶网络中制备磷灰石。在丙烯酸/聚乙烯醇凝胶和明胶凝胶中，观察到凝胶网络上磷灰石的形成。聚合物/磷灰石缀合物在干燥状态下具有多孔性和机械强度。它们的煅烧产物也呈现多孔结构。研究了凝胶的网状结构与无机材料的网状结构之间的关系。确定了凝胶合成的有效性和制备无机网络的最佳合成条件。本研究的方法对于无机多孔网络材料的简单制备是有效的。

Synthesis of conjugates between organic polymer hydrogel and inorganic colloids were carried out. The inorganic colloids were produced in the network of the gel. The conjugate between acrylic acid gel and hydrated cerium oxide revealed high adsorption capacity for As(III) (30mg/g) in spite of its small specific surface area (2m^2/g). Adsorption capacity of hydrated cerium oxide for As(III) was 11mg/g Although the specific surface area of the adsorbent was 50m^2/g. The network structure of gel produces a high dispersion state of the colloid in the network due to a slight swelling of gel, resulting in a production of high contact area of the colloid. Dissolution of the colloid was not observed in the conjugate during the adsorption of arsenic. The high performance conjugate adsorbent can be prepared using the organic gel network as a reaction field. Preparation of apatite in the network of hydrogel was performed using acrylic acid/PVA gel and gelatin gel as a reaction field of the apatite. In the acrylic acid/PVA and gelatin gels, formation of the apatite on the network of the gels was observed. The polymer/ apatite conjugates were porous and mechanically strong in their dry state. The calcined products of them also showed porous structure. The relationship between the network structure of the gels and the network structure of produced inorganic materials was investigated. The effectiveness of the synthesis in the gel and the optimum synthetic condition for the preparation of inorganic network were confirmed. The method studied in this research is effective in the simple preparation of inorganic porous network materials.