From Mechanical Spraying to Electrospraying-Advanced Technology Teaching in Higher Education

摘要

It is important to explain the advanced nanotechnology to the college students in higher education for training their creativity and arousing their learning interests. In this paper, a new method was developed for teaching the new technology in a vivid manner. The results demonstrated that an analogical comparison between a traditional technique and an advanced one not only can effectively promote the students to understand the new one, but also can be used as a useful tool to encourage the student to do more self-learning about material science and engineering in higher education. With electrospraying as a technique model, the difficulties in clear explanations this complicated new process in the class could be easily overcome by the usage of traditional spraying as a start point. Based on their past knowledge and experience about the spraying processes, the college students majoring in material engineering were able to quickly grasp the essences of electrospraying, discriminated the differences between electrospraying and spraying. Some students eagerly went to the experimental laboratory to carry out some experiments about the preparations and characterizations of electrosprayed protein microparticles.