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Method for preparing SiO2 heat-insulation heat-preservation composite aerogel material by taking gasified ash as silicon source
The invention discloses a method for preparing a SiO2 heat-insulation heat-preservation composite aerogel material by taking gasified ash as a silicon source. The method comprises the following steps: 1, crushing and grinding the gasified ash to obtain ground fine slag; 2, carrying out floating and sinking treatment on screen underflow obtained after the ground fine slag is vibrated and separated, and collecting bottom sediment; 3, pickling the bottom precipitate, and cleaning to obtain a water washing product; 4, heating and refluxing the washed product and a NaOH solution to prepare a silicon source precursor; 5, adding a cross-linking agent into the silicon source precursor, and carrying out gelation reaction to obtain composite gel; immersing the composite gel into a modifier/tert-butyl alcohol solution for modification to obtain modified composite gel; and 6, carrying out vacuum freeze drying on the composite gel or the modified composite gel. According to the invention, cheap and nontoxic gasified ash is taken as a silicon source, efficient and high-valued utilization of gasified ash resources is realized by adopting sol-gel and vacuum freeze-drying processes, and the prepared product is applicable to the fields of building energy-saving materials, dielectric materials, thermal insulation materials and the like.
本发明公开了一种以气化灰渣为硅源制备SiO2隔热保温复合气凝胶材料的方法，该方法包括：一、将气化灰渣破碎研磨得到研磨细渣；二、将研磨细渣振动筛分后的筛下物进行浮沉处理，并收集底部沉淀；三、将底部沉淀酸洗后清洗得到水洗产物；四、将水洗产物与NaOH溶液加热回流制备硅源前驱体；五、向硅源前驱体中加入交联剂进行凝胶化反应得到复合凝胶；将复合凝胶浸入改性剂/叔丁醇溶液中改性得到改性复合凝胶；六、将复合凝胶或改性复合凝胶真空冷冻干燥。本发明以廉价无毒的气化灰渣为硅源，采用溶胶‑凝胶和真空冷冻干燥工艺，实现了对气化灰渣资源的高效及高值化利用，制备的产物适用于建筑节能材料、介电材料、隔热保温材料等领域。
Method for preparing SiO2 heat-insulation heat-preservation composite aerogel material by taking gasified ash as silicon source
The invention discloses a method for preparing a SiO2 heat-insulation heat-preservation composite aerogel material by taking gasified ash as a silicon source. The method comprises the following steps: 1, crushing and grinding the gasified ash to obtain ground fine slag; 2, carrying out floating and sinking treatment on screen underflow obtained after the ground fine slag is vibrated and separated, and collecting bottom sediment; 3, pickling the bottom precipitate, and cleaning to obtain a water washing product; 4, heating and refluxing the washed product and a NaOH solution to prepare a silicon source precursor; 5, adding a cross-linking agent into the silicon source precursor, and carrying out gelation reaction to obtain composite gel; immersing the composite gel into a modifier/tert-butyl alcohol solution for modification to obtain modified composite gel; and 6, carrying out vacuum freeze drying on the composite gel or the modified composite gel. According to the invention, cheap and nontoxic gasified ash is taken as a silicon source, efficient and high-valued utilization of gasified ash resources is realized by adopting sol-gel and vacuum freeze-drying processes, and the prepared product is applicable to the fields of building energy-saving materials, dielectric materials, thermal insulation materials and the like.
本发明公开了一种以气化灰渣为硅源制备SiO2隔热保温复合气凝胶材料的方法，该方法包括：一、将气化灰渣破碎研磨得到研磨细渣；二、将研磨细渣振动筛分后的筛下物进行浮沉处理，并收集底部沉淀；三、将底部沉淀酸洗后清洗得到水洗产物；四、将水洗产物与NaOH溶液加热回流制备硅源前驱体；五、向硅源前驱体中加入交联剂进行凝胶化反应得到复合凝胶；将复合凝胶浸入改性剂/叔丁醇溶液中改性得到改性复合凝胶；六、将复合凝胶或改性复合凝胶真空冷冻干燥。本发明以廉价无毒的气化灰渣为硅源，采用溶胶‑凝胶和真空冷冻干燥工艺，实现了对气化灰渣资源的高效及高值化利用，制备的产物适用于建筑节能材料、介电材料、隔热保温材料等领域。
Method for preparing SiO2 heat-insulation heat-preservation composite aerogel material by taking gasified ash as silicon source
以气化灰渣为硅源制备SiO2隔热保温复合气凝胶材料的方法
SHANG WEIKE (author) / LIN YIAN (author) / CAI MEI (author) / WANG XING (author) / ZHENG YALAN (author) / HE GENLIANG (author) / XU HONGWEI (author) / WEI SUNCHANG (author) / LUO JINCHENG (author) / ZHAO MENG (author)
2024-02-23
Patent
Electronic Resource
Chinese
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