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A platform for research: civil engineering, architecture and urbanism
Hydrophobic flame-retardant silicon dioxide aerogel ceramic fiber felt and preparation method thereof
The invention discloses a hydrophobic flame-retardant silicon dioxide aerogel ceramic fiber felt and a preparation method thereof. The preparation method comprises the steps of uniformly stirring sodium silicate and deionized water to obtain a mixed solution A; slowly adding the mixed solution A into the acid solution in a stirring state, stopping adding until the mixed solution A reaches a specified pH value, then adding a flame retardant, and uniformly stirring; quickly pouring the silicon dioxide sol containing the flame retardant into a mold filled with the ceramic fiber felt to completely soak the ceramic fiber felt, standing at room temperature, taking out the ceramic fiber felt, and carrying out gel curing; and carrying out solvent replacement, surface modification and drying treatment on the ceramic fiber felt to be subjected to gel curing to obtain the hydrophobic flame-retardant silicon dioxide aerogel ceramic fiber felt. Through the mode, cheap sodium silicate can be selected as a silicon source, so that the cost can be saved, and the added uniformly dispersed flame retardant can form a flame-retardant system with silicon dioxide aerogel, so that the flame retardance is improved; and the hydrophobicity of the silicon dioxide aerogel ceramic fiber felt is improved through surface modification.
本发明公开了一种疏水阻燃二氧化硅气凝胶陶瓷纤维毡及其制备方法，将水玻璃和去离子水搅拌均匀得到混合溶液A；在搅拌状态下将混合溶液A缓慢加入酸性溶液中，直至混合溶液A的达到指定pH值时停止加入，然后加入阻燃剂搅拌均匀后；将含阻燃剂的二氧化硅溶胶快速倒入装有陶瓷纤维毡的模具中，使陶瓷纤维毡完全浸透，室温静置后取出，进行凝胶固化；待凝胶固化的陶瓷纤维毡进行溶剂置换、表面改性、干燥处理得到疏水阻燃二氧化硅气凝胶陶瓷纤维毡。通过上述方式，本发明能够选用廉价的水玻璃为硅源，不仅可以节约成本，添加均匀分散的阻燃剂可以和二氧化硅气凝胶形成阻燃体系，提高阻燃性；表面改性增加了二氧化硅气凝胶陶瓷纤维毡的疏水性。
Hydrophobic flame-retardant silicon dioxide aerogel ceramic fiber felt and preparation method thereof
The invention discloses a hydrophobic flame-retardant silicon dioxide aerogel ceramic fiber felt and a preparation method thereof. The preparation method comprises the steps of uniformly stirring sodium silicate and deionized water to obtain a mixed solution A; slowly adding the mixed solution A into the acid solution in a stirring state, stopping adding until the mixed solution A reaches a specified pH value, then adding a flame retardant, and uniformly stirring; quickly pouring the silicon dioxide sol containing the flame retardant into a mold filled with the ceramic fiber felt to completely soak the ceramic fiber felt, standing at room temperature, taking out the ceramic fiber felt, and carrying out gel curing; and carrying out solvent replacement, surface modification and drying treatment on the ceramic fiber felt to be subjected to gel curing to obtain the hydrophobic flame-retardant silicon dioxide aerogel ceramic fiber felt. Through the mode, cheap sodium silicate can be selected as a silicon source, so that the cost can be saved, and the added uniformly dispersed flame retardant can form a flame-retardant system with silicon dioxide aerogel, so that the flame retardance is improved; and the hydrophobicity of the silicon dioxide aerogel ceramic fiber felt is improved through surface modification.
本发明公开了一种疏水阻燃二氧化硅气凝胶陶瓷纤维毡及其制备方法，将水玻璃和去离子水搅拌均匀得到混合溶液A；在搅拌状态下将混合溶液A缓慢加入酸性溶液中，直至混合溶液A的达到指定pH值时停止加入，然后加入阻燃剂搅拌均匀后；将含阻燃剂的二氧化硅溶胶快速倒入装有陶瓷纤维毡的模具中，使陶瓷纤维毡完全浸透，室温静置后取出，进行凝胶固化；待凝胶固化的陶瓷纤维毡进行溶剂置换、表面改性、干燥处理得到疏水阻燃二氧化硅气凝胶陶瓷纤维毡。通过上述方式，本发明能够选用廉价的水玻璃为硅源，不仅可以节约成本，添加均匀分散的阻燃剂可以和二氧化硅气凝胶形成阻燃体系，提高阻燃性；表面改性增加了二氧化硅气凝胶陶瓷纤维毡的疏水性。
Hydrophobic flame-retardant silicon dioxide aerogel ceramic fiber felt and preparation method thereof
疏水阻燃二氧化硅气凝胶陶瓷纤维毡及其制备方法
GUO XINGZHONG (author) / WANG FAN (author) / LEI WEI (author) / DING RONGHUA (author) / ZHANG YUN (author)
2021-11-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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