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Aluminum silicate ceramic fiber precursor gel preparation method
The invention provides an aluminum silicate ceramic fiber precursor gel preparation method, which comprises: S1, carrying out intermittent pulse ultrasonic hydrolysis on an inorganic aluminum salt to obtain an inorganic aluminum salt hydrolysate; s2, adding an organic aluminum salt into the inorganic aluminum salt hydrolysate, and performing intermittent pulse ultrasonic hydrolysis to obtain a mixed aluminum salt hydrolysate; s3, adding a silicon source into the mixed aluminum salt hydrolysate, uniformly dispersing, and hydrolyzing to obtain a silicon-aluminum hydrolysate; s4, adding a thickening agent into the silicon-aluminum hydrolysate, and carrying out polymerization reaction under ultraviolet irradiation to obtain a precursor; and S5, adding the precursor into absolute ethyl alcohol, and concentrating in an alcohol-water system under ultraviolet irradiation to obtain the aluminum silicate ceramic fiber precursor gel. According to the preparation method disclosed by the invention, intermittent pulse ultrasound-assisted hydrolysis, ultraviolet illumination-induced hydrolysis and alcohol-water system concentration gel formation are adopted, so that the precursor gel of the aluminum silicate ceramic fiber with controllable components and performance is rapidly obtained, and the gel can be widely applied to mechanical spinning or extrusion spinning.
本发明提供了一种硅酸铝陶瓷纤维前驱凝胶的制备方法，其包括如下步骤：S1、将无机铝盐进行间歇式脉冲超声水解，得到无机铝盐水解液；S2、在所述无机铝盐水解液中加入有机铝盐，间歇式脉冲超声水解，得到混合铝盐水解液；S3、在所述混合铝盐水解液中加入硅源，分散均匀后，水解得到硅铝水解液；S4、在所述硅铝水解液中加入增稠剂后，在紫外光照下进行聚合反应，得到前驱体；S5、将所述前驱体加入无水乙醇，在紫外光照下醇水体系中进行浓缩，得到所述硅酸铝陶瓷纤维前驱凝胶。本发明采用间歇式脉冲超声辅助水解、紫外光照诱导水解及醇水体系浓缩成胶，以快速获得组分及性能可控的硅酸铝陶瓷纤维的前驱凝胶，该凝胶可广泛适用于机械纺丝或挤压纺丝。
Aluminum silicate ceramic fiber precursor gel preparation method
The invention provides an aluminum silicate ceramic fiber precursor gel preparation method, which comprises: S1, carrying out intermittent pulse ultrasonic hydrolysis on an inorganic aluminum salt to obtain an inorganic aluminum salt hydrolysate; s2, adding an organic aluminum salt into the inorganic aluminum salt hydrolysate, and performing intermittent pulse ultrasonic hydrolysis to obtain a mixed aluminum salt hydrolysate; s3, adding a silicon source into the mixed aluminum salt hydrolysate, uniformly dispersing, and hydrolyzing to obtain a silicon-aluminum hydrolysate; s4, adding a thickening agent into the silicon-aluminum hydrolysate, and carrying out polymerization reaction under ultraviolet irradiation to obtain a precursor; and S5, adding the precursor into absolute ethyl alcohol, and concentrating in an alcohol-water system under ultraviolet irradiation to obtain the aluminum silicate ceramic fiber precursor gel. According to the preparation method disclosed by the invention, intermittent pulse ultrasound-assisted hydrolysis, ultraviolet illumination-induced hydrolysis and alcohol-water system concentration gel formation are adopted, so that the precursor gel of the aluminum silicate ceramic fiber with controllable components and performance is rapidly obtained, and the gel can be widely applied to mechanical spinning or extrusion spinning.
本发明提供了一种硅酸铝陶瓷纤维前驱凝胶的制备方法，其包括如下步骤：S1、将无机铝盐进行间歇式脉冲超声水解，得到无机铝盐水解液；S2、在所述无机铝盐水解液中加入有机铝盐，间歇式脉冲超声水解，得到混合铝盐水解液；S3、在所述混合铝盐水解液中加入硅源，分散均匀后，水解得到硅铝水解液；S4、在所述硅铝水解液中加入增稠剂后，在紫外光照下进行聚合反应，得到前驱体；S5、将所述前驱体加入无水乙醇，在紫外光照下醇水体系中进行浓缩，得到所述硅酸铝陶瓷纤维前驱凝胶。本发明采用间歇式脉冲超声辅助水解、紫外光照诱导水解及醇水体系浓缩成胶，以快速获得组分及性能可控的硅酸铝陶瓷纤维的前驱凝胶，该凝胶可广泛适用于机械纺丝或挤压纺丝。
Aluminum silicate ceramic fiber precursor gel preparation method
一种硅酸铝陶瓷纤维前驱凝胶的制备方法
LUO ZHIMIN (Autor:in) / LI ZHONGSHUI (Autor:in) / LUO XIANSHU (Autor:in) / ZHENG SHAO'AN (Autor:in)
02.07.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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