Application of Chemical modification of Graphene and Nano Diamonds in Speakers

• Main Authors: LEE,WEI-JEN, 李維仁
• Other Authors: CHEN, CHIEN-SHENG
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/gc36hx

碩士 === 輔仁大學 === 化學系 === 106 === A liquid coating method is proposed in this thesis, in which a aromatic ring-modified graphene and a nano-diamond were liquid-coating on silk membrane or a PET polymer film. Those composite nano-materials were applied construct a film and to improve the high-frequency response of the speaker. In order to improve the dispersion effect of graphene and nanodiamonds in organic solvents, aromatic ring of functional groups were modified on the surface of graphene and nanodiamonds, and aromatic modified graphene 3-8 and nano-diamonds 9-14 were prepared by diazo-coupling reaction. Among them, toluene-modified graphene 3CH3 can be used to improve the high-pitched performance of silky speaker, acid-based aromatic ring modified nano-diamond 9BA and 14SO3H can be used to improve the high-pitched performance of PET polymer film. Nuclear magnetic resonance spectroscopy confirmed that benzoic acid and benzenesulfonic acid can form a hydrogen bond network with dimethyl terephthalate. It is indirectly confirmed that the acid-based aromatic ring modified nano-diamond can chelating with PET polymer to construct a composite film layer and to improve the high frequency response of the speakers.