摘要
接触角是衡量固体表面润湿性的重要指标,现有方法在微细颗粒接触角测量方面存在局限性,颗粒润湿性的测试与表征仍是难题。为此研制了一种颗粒润湿性测试教学实验设备,结合高速显微摄像技术与虚拟仪器技术,精确控制气泡大小及气泡运动状态,将颗粒与气泡相互作用的过程可视化。通过该设备可以观测规则球形颗粒的接触角,测定不规则形状颗粒与气泡的诱导时间,能够全面测试颗粒的润湿性,为学生提供了良好的实验研究和实践创新平台。
Contact angle is an important index to measure the wettability of solid surface. Existing methods have limitations in the measurement of fine particle contact angle, and the measurement and characterization of particle wettability are still a difficult problem. Therefore, a kind of teaching and experimental equipment for particle wettability test is developed. Combined with high-speed micro camera technology and virtual instrument technology, the bubble size and movement state are accurately controlled, and the process of particle bubble interaction is visualized. Through this equipment, the contact angle of regular spherical particles can be observed, the induction time of irregular particles and bubbles can be measured, and the wettability of particles can be comprehensively tested, which provides a good experimental research and practical innovation platform for students.
作者
张志军
庄丽
赵亮
ZHANG Zhijun;ZHUANG Li;ZHAO Liang(School of Chemical and Environment Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)
出处
《实验技术与管理》
CAS
北大核心
2021年第4期128-131,共4页
Experimental Technology and Management
基金
国家自然科学基金项目(51704300)
北京市自然科学基金项目(2192046)
中国矿业大学(北京)课程建设与教学改革项目(J170301)。
