重质碳酸钙粉体表面微波辅助改性的研究

Surface Modification of Heavy Calciam Carbonate Powder by Microwave-aided Method

通过与传统的加热搅拌改性方法的比较,微波辅助改性方法在浊度、浸润度、接触角等方面都优于传统改性方法。实验结果表明,该方法不仅能取代传统的改性加热方式,实现对粉料的表面改性,而且可激发物质内部分子进行超高频振动、摩擦,可实现分子水平上的“搅拌”,这种“激发效应”已开始在高分子合成和固化反应中应用。本文介绍了粉体表面微波辅助改性方法(发明专利申请号:031282598),提出了一套微波辅助改性装置,并以此对重质碳酸钙粉体表面进行异丙基三异硬脂酸基钛酸酯(TTS)改性,实验表明其效果优于传统的加热搅拌改性。

By compared to the traditional modification method of heating and stirring,the microwave aided method has many advantages on cloudiness,soakage,contact angle etc.The testing resuts show that this method can replace the traditional method to modify the suface of powder and excite the molecules vibrating and rubbing in super high freqency. The microwave heating can be considered as a “stirring”on molecular level, appear to have certain “activation effect”on materials.A method of surface modification for powder by microwave aided is introduced,and a set of installation is given. The surface modification of heavy calcium carbonate of coating TTS molecular by microwave aided method is researched. It is verified that the result of microwave aided surface modification is better than that of traditional methods.