颗粒粉碎/改性一体化中二者相互干扰和促进机理研究

项目名称： 颗粒粉碎/改性一体化中二者相互干扰和促进机理研究

项目编号： No.50804004

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 无线电电子学、电信技术

项目作者： 蔡楚江

作者单位： 北京航空航天大学

项目金额： 20万元

中文摘要： 本项目将目前矿物颗粒填料两种重要的深加工技术- - 气流粉碎与表面改性二者有机地结合在一起，在对矿物颗粒进行气流粉碎的同时进行表面改性处理，获得功能性填料。在项目研究中，基于粉碎改性一体化方法中粉碎过程与改性过程之间的交互作用特点，以减小二者之间的相互干扰问题，充分利用二者之间的相互促进效果为目的，选择碳酸钙、碳化硅、二氧化硅三种具有代表性的矿物颗粒，系统地对气流粉碎与表面改性一体化处理方法进行了研究。研究结果表明：（1）采用提高气流粉碎温度、提高改性剂溶液浓度、粉碎腔中进行表面改性处理等方式，可以改善和解决粉碎改性一体化方法中粉碎过程和改性过程二者之间的相互干扰问题；（2）采用一体化处理方法对矿物颗粒进行处理，可以实现在粉碎过程中对矿物颗粒进行表面改性处理，同时还可以提高颗粒的气流粉碎出料速度，明确了各参数对颗粒粉碎改性效果的影响趋势；（3）研究改性剂通过气相在固体表面的吸附机理，从机理上验证了在气流粉碎过程中可以实现颗粒的表面改性处理。本项目的研究成果推进了超细颗粒制备与处理的研究进展，为超细改性颗粒的制备提供了一种新的方法。

中文关键词： 气流粉碎；表面改性；一体化；改性机理

英文摘要： Nowadays, air jet pulverization and surface modification are two important methods to achieve the functional mineral filler. Surface modification of mineral combined with the ultrafine comminution in an air jet mill was studied in this project. In the combined modification-comminution process, the contradictory aspects and the stimulative aspects between the modification and comminution were studied. In order to decrease the contradictory aspects and increase the stimulative aspects in combined process, calcium carbonate, silicon carbide and silica minerals were chosen to prepared in the combined process, the results indicated that: (1) Three techniques, increasing temperature of compressed air, increasing concentration of modifying agent solution, and modifying the powder in the air jet mill vessel, can be used to decrease or resolve the contradictory aspects between the modification and comminution in combined process; (2) In the combined modification-comminution process, the ultrafine modified mineral particles can be prepared in an air jet mill in one step, and the production rate of mineral particles also can be increased; (3) The adsorption mechanism of the modifying agent was studied microcosmically by AFM, which can prove the possibility of the combined modification-comminution process. In this project, the technology of powder comminution and surface modification in air jet mill were studied systemically, which afford a novel method and improve the technology of ultrafine functional powder treatment.

英文关键词： air jet pulverization; surface modification; integration; modification mechanism