Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of improved silicon dioxide aerogel and silicon dioxide aerogel
The invention belongs to the field of aerogel, in particular discloses a preparation method of an improved silicon dioxide aerogel and the silicon dioxide aerogel. The preparation method comprises steps: adding 3-aminopropyltrihydroxysilane to participate in a condensation reaction after a hydrolysis step of the preparation step of the silicon dioxide aerogel; aging, replacing and modifying with amodifier to obtain an amino modified silicon dioxide wet gel; soaking the wet gel into a polyacyl chloride compound; reacting amino and acyl chloride quickly to form a thin-layer cross-linked polyamide compound on the surface of the silicon dioxide wet gel; drying to obtain a thin-layer cross-linked polyamide compound coated silicon dioxide aerogel; removing the external layer polyamide compoundto obtain the relatively pure silicon dioxide aerogel. According to the invention, a new thought is provided for preparing the silicon dioxide aerogel with high purity.
本发明属于气凝胶领域，具体是一种改进型二氧化硅气凝胶的制备方法及二氧化硅气凝胶，在二氧化硅气凝胶制备步骤的水解步骤后加入3‑氨丙基三羟基硅烷参与缩合反应，经过老化、置换和修饰剂修饰后，获得氨基改性二氧化硅湿凝胶，浸泡入多酰氯化合物中，氨基与酰氯快速反应在二氧化硅湿凝胶表面形成薄层的交联型聚酰胺化合物，干燥后即获得薄层交联型聚酰胺化合物包覆的二氧化硅气凝胶，除去外层的聚酰胺化合物，即可获得较纯的二氧化硅气凝胶，本发明为制备纯度较高的二氧化硅气凝胶提供了一个新的思路。
Preparation method of improved silicon dioxide aerogel and silicon dioxide aerogel
The invention belongs to the field of aerogel, in particular discloses a preparation method of an improved silicon dioxide aerogel and the silicon dioxide aerogel. The preparation method comprises steps: adding 3-aminopropyltrihydroxysilane to participate in a condensation reaction after a hydrolysis step of the preparation step of the silicon dioxide aerogel; aging, replacing and modifying with amodifier to obtain an amino modified silicon dioxide wet gel; soaking the wet gel into a polyacyl chloride compound; reacting amino and acyl chloride quickly to form a thin-layer cross-linked polyamide compound on the surface of the silicon dioxide wet gel; drying to obtain a thin-layer cross-linked polyamide compound coated silicon dioxide aerogel; removing the external layer polyamide compoundto obtain the relatively pure silicon dioxide aerogel. According to the invention, a new thought is provided for preparing the silicon dioxide aerogel with high purity.
本发明属于气凝胶领域，具体是一种改进型二氧化硅气凝胶的制备方法及二氧化硅气凝胶，在二氧化硅气凝胶制备步骤的水解步骤后加入3‑氨丙基三羟基硅烷参与缩合反应，经过老化、置换和修饰剂修饰后，获得氨基改性二氧化硅湿凝胶，浸泡入多酰氯化合物中，氨基与酰氯快速反应在二氧化硅湿凝胶表面形成薄层的交联型聚酰胺化合物，干燥后即获得薄层交联型聚酰胺化合物包覆的二氧化硅气凝胶，除去外层的聚酰胺化合物，即可获得较纯的二氧化硅气凝胶，本发明为制备纯度较高的二氧化硅气凝胶提供了一个新的思路。
Preparation method of improved silicon dioxide aerogel and silicon dioxide aerogel
一种改进型二氧化硅气凝胶的制备方法及二氧化硅气凝胶
WENG CHAOYANG (Autor:in)
11.08.2020
Patent
Elektronische Ressource
Chinesisch
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