Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing cellulose/SiO2 aerogel from coal gangue
The invention discloses a novel method for preparing cellulose/SiO2 aerogel from coal gangue. The method comprises the following steps: firstly, calcining and activating coal gangue, and carrying out acid leaching to obtain SiO2 powder; weighing a certain amount of SiO2 powder to prepare SiO2 sol; a certain amount of cellulose is weighed to prepare cellulose sol, the cellulose sol and the cellulose sol are mixed and stirred, a certain amount of cross-linking agent is added in the stirring process, the solution is poured into a template for gelling when the solution is viscous, the gel is placed in a Na2SiO3 solution to be aged for a certain time after being formed, and the cellulose/SiO2 aerogel is obtained through drying. The method for preparing the cellulose/SiO2 aerogel is simple and safe to operate and does not involve high-temperature and high-pressure reaction, and the aerogel has the characteristics of high specific surface area and high porosity. The material can be used as a good adsorbent material. Meanwhile, the added value of the coal gangue is improved, and the method has very important significance on actual production work.
本发明公开一种煤矸石制备纤维素/SiO2气凝胶的新方法。步骤如下：首先对煤矸石煅烧活化、酸浸得到SiO2粉末。称取一定量的SiO2粉末制备SiO2溶胶；称取一定量的纤维素制备纤维素溶胶，将二者混合搅拌，在搅拌过程中加入一定量的交联剂，待溶液粘稠倒入模板中凝胶，凝胶形成后将其放在Na2SiO3溶液中老化一定时间，经干燥得到纤维素/SiO2气凝胶。本发明所制备纤维素/SiO2气凝胶的方法操作简单安全，不涉及高温高压反应，且气凝胶具有高比表面积和高孔隙率的特性。可作为良好的吸附剂材料。同时提高了煤矸石附加值，对实际生产工作具有非常重要的意义。
Method for preparing cellulose/SiO2 aerogel from coal gangue
The invention discloses a novel method for preparing cellulose/SiO2 aerogel from coal gangue. The method comprises the following steps: firstly, calcining and activating coal gangue, and carrying out acid leaching to obtain SiO2 powder; weighing a certain amount of SiO2 powder to prepare SiO2 sol; a certain amount of cellulose is weighed to prepare cellulose sol, the cellulose sol and the cellulose sol are mixed and stirred, a certain amount of cross-linking agent is added in the stirring process, the solution is poured into a template for gelling when the solution is viscous, the gel is placed in a Na2SiO3 solution to be aged for a certain time after being formed, and the cellulose/SiO2 aerogel is obtained through drying. The method for preparing the cellulose/SiO2 aerogel is simple and safe to operate and does not involve high-temperature and high-pressure reaction, and the aerogel has the characteristics of high specific surface area and high porosity. The material can be used as a good adsorbent material. Meanwhile, the added value of the coal gangue is improved, and the method has very important significance on actual production work.
本发明公开一种煤矸石制备纤维素/SiO2气凝胶的新方法。步骤如下：首先对煤矸石煅烧活化、酸浸得到SiO2粉末。称取一定量的SiO2粉末制备SiO2溶胶；称取一定量的纤维素制备纤维素溶胶，将二者混合搅拌，在搅拌过程中加入一定量的交联剂，待溶液粘稠倒入模板中凝胶，凝胶形成后将其放在Na2SiO3溶液中老化一定时间，经干燥得到纤维素/SiO2气凝胶。本发明所制备纤维素/SiO2气凝胶的方法操作简单安全，不涉及高温高压反应，且气凝胶具有高比表面积和高孔隙率的特性。可作为良好的吸附剂材料。同时提高了煤矸石附加值，对实际生产工作具有非常重要的意义。
Method for preparing cellulose/SiO2 aerogel from coal gangue
一种煤矸石制备纤维素/SiO2气凝胶的方法
DING CHENGLI (Autor:in) / HU CANMING (Autor:in)
30.07.2024
Patent
Elektronische Ressource
Chinesisch
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