Abstract
Recent uses of flexible electret loudspeakers in futuristic applications have garnered muchinterest for these novel loudspeakers. In this paper, a novel thin film processingmethod was developed to improve the performance of an electret diaphragm. Thispaper discusses the relationship between the charge storage and the additiveconcentration. A cyclic olefin copolymer (COC) thin film containing an additive such as2-(6-mercaptohexyl) malonic acid was prepared using a spin-coating process.Furthermore, attention was directed towards the processing conditions which werefound to have an important role and are related to the self-assembly and micelleformation behavior of the additives in the COC. In the present study, thin films of 13 µm thickness were charged by a corona method. Compared with areference thin film of pure COC, results indicated that when a 3497 mg kg − 1 additivewas added to the COC matrix, the obtained surface potential was 71% higher. Thus, the results show thata COC + additive thin film leads to a much improved charge storage. It appears to be an inexpensiveand relatively easy way to form a thin structure for developing novel flexible electretloudspeakers.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
