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Anti-dusting and high-temperature-resistant hydrophobic aerogel felt and preparation method thereof
The invention belongs to the field of silica aerogel, and particularly relates to an anti-dusting and high-temperature-resistant hydrophobic aerogel felt and a preparation method thereof. The preparation method comprises the following steps: mixing and stirring a silicon source, a solvent, deionized water and ammonia water, and then adding a catalyst for condensation polymerization to obtain sol; immersing high-temperature-resistant fibers into the sol, and obtaining saturated sol after the high-temperature-resistant fibers absorb the sol in a saturated manner; heating the saturated sol to complete a condensation polymerization reaction so as to obtain wet gel; immersing the wet gel into ethanol to replace water in the wet gel, and then aging to obtain aged wet gel; under the supercritical condition, the aged wet gel is in contact with CO2 fluid to be dried, and after drying is completed, the anti-powder-falling and high-temperature-resistant hydrophobic aerogel felt is obtained. According to the preparation method, a sol-gel two-step method is adopted, and the prepared aerogel felt has the characteristics that powder does not fall off when the aerogel felt is bent by 90 degrees, the hydrophobic rate reaches 98% or above, and the aerogel felt can resist the high temperature of 1000 DEG C.
本发明属于硅气凝胶领域，具体涉及一种防掉粉、耐高温的疏水气凝胶毡及其制备方法。所述制备方法包括如下步骤：将硅源、溶剂、去离子水、氨水进行混合搅拌，完成后加入催化剂进行缩聚反应，得到溶胶；将耐高温纤维浸入所述溶胶中，待所述耐高温纤维饱和吸收所述溶胶后，得到饱和溶胶；再对所述饱和溶胶进行加热以完成缩聚反应，得到湿凝胶；将所述湿凝胶浸入乙醇中，以置换所述湿凝胶中的水，然后进行老化，得到老化湿凝胶；在超临界条件下，将所述老化湿凝胶与CO2流体进行接触，以进行干燥，完成后得到所述防掉粉、耐高温的疏水气凝胶毡。所述制备方法采用“溶胶‑凝胶”两步法，制备得到的气凝胶毡具有弯折90度下仍不掉粉，疏水率达98％以上且耐1000℃高温的特性。
Anti-dusting and high-temperature-resistant hydrophobic aerogel felt and preparation method thereof
The invention belongs to the field of silica aerogel, and particularly relates to an anti-dusting and high-temperature-resistant hydrophobic aerogel felt and a preparation method thereof. The preparation method comprises the following steps: mixing and stirring a silicon source, a solvent, deionized water and ammonia water, and then adding a catalyst for condensation polymerization to obtain sol; immersing high-temperature-resistant fibers into the sol, and obtaining saturated sol after the high-temperature-resistant fibers absorb the sol in a saturated manner; heating the saturated sol to complete a condensation polymerization reaction so as to obtain wet gel; immersing the wet gel into ethanol to replace water in the wet gel, and then aging to obtain aged wet gel; under the supercritical condition, the aged wet gel is in contact with CO2 fluid to be dried, and after drying is completed, the anti-powder-falling and high-temperature-resistant hydrophobic aerogel felt is obtained. According to the preparation method, a sol-gel two-step method is adopted, and the prepared aerogel felt has the characteristics that powder does not fall off when the aerogel felt is bent by 90 degrees, the hydrophobic rate reaches 98% or above, and the aerogel felt can resist the high temperature of 1000 DEG C.
本发明属于硅气凝胶领域，具体涉及一种防掉粉、耐高温的疏水气凝胶毡及其制备方法。所述制备方法包括如下步骤：将硅源、溶剂、去离子水、氨水进行混合搅拌，完成后加入催化剂进行缩聚反应，得到溶胶；将耐高温纤维浸入所述溶胶中，待所述耐高温纤维饱和吸收所述溶胶后，得到饱和溶胶；再对所述饱和溶胶进行加热以完成缩聚反应，得到湿凝胶；将所述湿凝胶浸入乙醇中，以置换所述湿凝胶中的水，然后进行老化，得到老化湿凝胶；在超临界条件下，将所述老化湿凝胶与CO2流体进行接触，以进行干燥，完成后得到所述防掉粉、耐高温的疏水气凝胶毡。所述制备方法采用“溶胶‑凝胶”两步法，制备得到的气凝胶毡具有弯折90度下仍不掉粉，疏水率达98％以上且耐1000℃高温的特性。
Anti-dusting and high-temperature-resistant hydrophobic aerogel felt and preparation method thereof
一种防掉粉、耐高温的疏水气凝胶毡及其制备方法
ZHOU XIAOFANG (author) / HE TAO (author) / XING HOUPU (author) / LI JIANPING (author) / SU FENG (author)
2024-05-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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