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Modification method for surface silanization of silicon carbide micro-powder and modified silicon carbide micro-powder
According to a modification method for surface silanization of silicon carbide micro-powder and modified silicon carbide micro-powder provided by the invention, silicon carbide micro-powder is added into a silane coupling agent mixed solution to be stirred to obtain silicon carbide slurry, the PH value of the silicon carbide slurry is adjusted to be within the alkaline range, and the silanized modified silicon carbide micro-powder is obtained after the silicon carbide slurry is dried. The invention provides a modification method for surface silanization of silicon carbide micro powder. Becausethe silane coupling agent is a molecular inorganic filler containing an organic functional group and a hydrolytic inorganic functional group at the same time, the silane coupling agent can form chemical bonds with active groups on the surface of the material, the hydrolytic inorganic functional group is hydrolyzed into silanol, the silanol and hydroxyl on the surface of the nano silicon carbide powder form a hydrogen bond, and silicon hydroxyl can be condensed and dehydrated to form a covalent compound bond, so that the coupling agent forms a coupling layer on the surface of the nano siliconcarbide powder, the hydrophilicity of the powder can be reduced, and the agglomeration phenomenon can be alleviated. The prepared modified silicon carbide micro powder is good in dispersity and high in stability, and the preparation process is simple to operate.
本发明提供的碳化硅微粉表面硅烷化的改性方法及改性碳化硅微粉，将碳化硅微粉加入硅烷偶联剂混合溶液搅拌后得到碳化硅浆料，调节碳化硅浆料的PH值在碱性范围内，将碳化硅浆料干燥后得到硅烷化的改性碳化硅微粉。本发明提供碳化硅微粉表面硅烷化的改性方法，由于硅烷偶联剂是一类同时含有有机官能团和水解性无机官能团的分子无机填料，可与材料表面的活性基团形成化学键，水解性无机官能团水解成硅醇，硅醇与纳米碳化硅粉体表面的羟基形成氢键，硅羟基会凝聚失水，形成共价化合键，使偶联剂在纳米碳化硅粉体表面形成偶联层，可降低粉体的亲水性，减轻团聚现象，制备的改性碳化硅微粉分散性好、稳定性高，且制备工艺操作简单。
Modification method for surface silanization of silicon carbide micro-powder and modified silicon carbide micro-powder
According to a modification method for surface silanization of silicon carbide micro-powder and modified silicon carbide micro-powder provided by the invention, silicon carbide micro-powder is added into a silane coupling agent mixed solution to be stirred to obtain silicon carbide slurry, the PH value of the silicon carbide slurry is adjusted to be within the alkaline range, and the silanized modified silicon carbide micro-powder is obtained after the silicon carbide slurry is dried. The invention provides a modification method for surface silanization of silicon carbide micro powder. Becausethe silane coupling agent is a molecular inorganic filler containing an organic functional group and a hydrolytic inorganic functional group at the same time, the silane coupling agent can form chemical bonds with active groups on the surface of the material, the hydrolytic inorganic functional group is hydrolyzed into silanol, the silanol and hydroxyl on the surface of the nano silicon carbide powder form a hydrogen bond, and silicon hydroxyl can be condensed and dehydrated to form a covalent compound bond, so that the coupling agent forms a coupling layer on the surface of the nano siliconcarbide powder, the hydrophilicity of the powder can be reduced, and the agglomeration phenomenon can be alleviated. The prepared modified silicon carbide micro powder is good in dispersity and high in stability, and the preparation process is simple to operate.
本发明提供的碳化硅微粉表面硅烷化的改性方法及改性碳化硅微粉，将碳化硅微粉加入硅烷偶联剂混合溶液搅拌后得到碳化硅浆料，调节碳化硅浆料的PH值在碱性范围内，将碳化硅浆料干燥后得到硅烷化的改性碳化硅微粉。本发明提供碳化硅微粉表面硅烷化的改性方法，由于硅烷偶联剂是一类同时含有有机官能团和水解性无机官能团的分子无机填料，可与材料表面的活性基团形成化学键，水解性无机官能团水解成硅醇，硅醇与纳米碳化硅粉体表面的羟基形成氢键，硅羟基会凝聚失水，形成共价化合键，使偶联剂在纳米碳化硅粉体表面形成偶联层，可降低粉体的亲水性，减轻团聚现象，制备的改性碳化硅微粉分散性好、稳定性高，且制备工艺操作简单。
Modification method for surface silanization of silicon carbide micro-powder and modified silicon carbide micro-powder
一种碳化硅微粉表面硅烷化的改性方法及改性碳化硅微粉
ZHANG GE (author) / GUO CONGHUI (author) / ZHANG WEI (author) / ZHANG YONGGANG (author) / WEN ZHANGPING (author)
2020-04-10
Patent
Electronic Resource
Chinese
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